Total rewrite, uses hash tables for speed and low memory use.

2 files changed, 2496 insertions, 1358 deletions

diff --git a/archival/dpkg.c b/archival/dpkg.c
index 020a68a90..ffe746703 100644
--- a/archival/dpkg.c
+++ b/archival/dpkg.c
@@ -1,854 +1,1423 @@
-#include <ctype.h>
-#include <dirent.h>
+/*
+ *  Mini dpkg implementation for busybox.
+ *  This is not meant as a replacemnt for dpkg
+ *
+ *  Copyright (C) 2001 by Glenn McGrath
+ * 		
+ *  Started life as a busybox implementation of udpkg
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Known difference between busybox dpkg and the official dpkg that i dont
+ * consider important, its worth keeping a note of differences anyway, just to
+ * make it easier to maintain.
+ *  - The first value for the Confflile: field isnt placed on a new line.
+ *  - The <package>.control file is extracted and kept in the info dir.
+ *  - When installing a package the Status: field is placed at the end of the
+ *      section, rather than just after the Package: field.
+ *  - Packages with previously unknown status are inserted at the begining of
+ *      the status file
+ *
+ * Bugs that need to be fixed
+ *  - (unknown, please let me know when you find any)
+ *
+ */
+
 #include <getopt.h>
-#include <stdio.h>
-#include <string.h>
 #include <stdlib.h>
-#include <search.h>
-#include <errno.h>
-#include <fcntl.h>
+#include <string.h>
 #include <unistd.h>
-#include <utime.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
 #include "busybox.h"
 
-#define DEPENDSMAX	64	/* maximum number of depends we can handle */
-
-/* Should we do full dependency checking? */
-//#define DODEPENDS 0
-
-/* Should we do debugging? */
-//#define DODEBUG 0
-
-#ifdef DODEBUG
-#define SYSTEM(x) do_system(x)
-#define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args)
-#else
-#define SYSTEM(x) system(x)
-#define DPRINTF(fmt,args...) /* nothing */
-#endif
-
-/* from dpkg-deb.c */
-
-static const char statusfile[] = "/var/lib/dpkg/status.udeb";
-static const char new_statusfile[] = "/var/lib/dpkg/status.udeb.new";
-static const char bak_statusfile[] = "/var/lib/dpkg/status.udeb.bak";
-
-static const char infodir[] = "/var/lib/dpkg/info/";
-static const char udpkg_quiet[] = "UDPKG_QUIET";
-
-//static const int status_want_unknown	= 1;
-static const int state_want_install	= 2;
-//static const int state_want_hold	= 3;
-//static const int state_want_deinstall	= 4;
-//static const int state_want_purge	= 5;
-
-static const int state_flag_ok	= 1;
-//static const int state_flag_reinstreq = 2; 
-//static const int state_flag_hold	= 3;
-//static const int state_flag_holdreinstreq = 4;
-
-//static const int state_statusnoninstalled = 1;
-static const int state_status_unpacked	= 2;
-static const int state_status_halfconfigured = 3; 
-static const int state_status_installed	= 4;
-static const int state_status_halfinstalled	= 5;
-//static const int state_statusconfigfiles	= 6;
-//static const int state_statuspostinstfailed	= 7;
-//static const int state_statusremovalfailed	= 8;
-
-static const char *state_words_want[] = { "unknown", "install", "hold", "deinstall", "purge", 0 };
-static const char *state_words_flag[] = { "ok", "reinstreq", "hold", "hold-reinstreq", 0 };
-static const char *state_words_status[] = { "not-installed", "unpacked", "half-configured", "installed", 
-		"half-installed", "config-files", "post-inst-failed", "removal-failed", 0 };
-
-static const int color_white	= 0;
-static const int color_grey	= 1;
-static const int color_black	= 2;
-
-/* data structures */ 
-typedef struct package_s {
-	char *filename;
-	char *package;
-	unsigned char state_want;
-	unsigned char state_flag;
-	unsigned char state_status;
-	char *depends;
-	char *provides;
-	char *description;
-	char *priority;
-	char *section;
-	char *installed_size;
-	char *maintainer;
-	char *source;
-	char *version;
-	char *pre_depends;
-	char *replaces;
-	char *recommends;
-	char *suggests;
-	char *conflicts;
-	char *conffiles;
-	char *long_description;
-	char *architecture;
-	char *md5sum;
-	int installer_menu_item;
-	char color; /* for topo-sort */
-	struct package_s *requiredfor[DEPENDSMAX]; 
-	unsigned short requiredcount;
-	struct package_s *next;
-} package_t;
-
-#ifdef DODEBUG
-static int do_system(const char *cmd)
-{
-	DPRINTF("cmd is %s\n", cmd);
-	return system(cmd);
-}
-#else
-#define do_system(cmd) system(cmd)
-#endif
+/* NOTE: If you vary HASH_PRIME sizes be aware,
+ * 1) Tweaking these will have a big effect on how much memory this program uses.
+ * 2) For computational efficiency these hash tables should be at least 20%
+ *    larger than the maximum number of elements stored in it.
+ * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking
+ *    for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
+ * 4) If you go bigger than 15 bits you may get into trouble (untested) as its
+ *    sometimes cast to an unsigned int, if you go to 16 bit you will overlap
+ *    int's and chaos is assured, 16381 is the max prime for 14 bit field
+ */
 
-static int package_compare(const void *p1, const void *p2)
-{
-	return strcmp(((package_t *)p1)->package, 
-		((package_t *)p2)->package);
-}
+/* NAME_HASH_PRIME, Stores package names and versions, 
+ * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
+ * as there a lot of duplicate version numbers */
+#define NAME_HASH_PRIME 16381
+char *name_hashtable[NAME_HASH_PRIME + 1];
+
+/* PACKAGE_HASH_PRIME, Maximum number of unique packages,
+ * It must not be smaller than STATUS_HASH_PRIME,
+ * Currently only packages from status_hashtable are stored in here, but in
+ * future this may be used to store packages not only from a status file,
+ * but an available_hashtable, and even multiple packages files.
+ * Package can be stored more than once if they have different versions.
+ * e.g. The same package may have different versions in the status file
+ *      and available file */
+#define PACKAGE_HASH_PRIME 10007
+typedef struct edge_s {
+	unsigned int operator:3;
+	unsigned int type:4;
+	unsigned int name:14;
+	unsigned int version:14;
+} edge_t;
+
+typedef struct common_node_s {
+	unsigned int name:14;
+	unsigned int version:14;
+	unsigned int num_of_edges:14;
+	edge_t **edge;
+} common_node_t;
+common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
+
+/* Currently it doesnt store packages that have state-status of not-installed
+ * So it only really has to be the size of the maximum number of packages
+ * likely to be installed at any one time, so there is a bit of leaway here */
+#define STATUS_HASH_PRIME 8191
+typedef struct status_node_s {
+	unsigned int package:14;	/* has to fit PACKAGE_HASH_PRIME */
+	unsigned int status:14;		/* has to fit STATUS_HASH_PRIME */
+} status_node_t;
+status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
+
+/* Even numbers are for 'extras', like ored dependecies or null */
+enum edge_type_e {
+	EDGE_NULL = 0,
+	EDGE_PRE_DEPENDS = 1,
+	EDGE_OR_PRE_DEPENDS = 2,
+	EDGE_DEPENDS = 3,
+	EDGE_OR_DEPENDS = 4,
+	EDGE_REPLACES = 5,
+	EDGE_PROVIDES = 7,
+	EDGE_CONFLICTS = 9,
+	EDGE_SUGGESTS = 11,
+	EDGE_RECOMMENDS = 13,
+	EDGE_ENHANCES = 15
+};
+enum operator_e {
+	VER_NULL = 0,
+	VER_EQUAL = 1,
+	VER_LESS = 2,
+	VER_LESS_EQUAL = 3,
+	VER_MORE = 4,
+	VER_MORE_EQUAL = 5,
+	VER_ANY = 6
+};
+
+enum dpkg_opt_e {
+	dpkg_opt_purge = 1,
+	dpkg_opt_remove = 2,
+	dpkg_opt_unpack = 4,
+	dpkg_opt_configure = 8,
+	dpkg_opt_install = 16,
+	dpkg_opt_package_name = 32,
+	dpkg_opt_filename = 64,
+	dpkg_opt_list_installed = 128,
+	dpkg_opt_force_ignore_depends = 256
+};
+
+typedef struct deb_file_s {
+	char *control_file;
+	char *filename;
+	unsigned int package:14;
+} deb_file_t;
 
-#ifdef DODEPENDS
 
-static char **depends_split(const char *dependsstr)
+void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime)
 {
-	static char *dependsvec[DEPENDSMAX];
-	char *p;
-	int i = 0;
+	unsigned long int hash_num = key[0];
+	int len = strlen(key);
+	int i;
 
-	dependsvec[0] = 0;
-	if (dependsstr == 0) {
-		goto end;
+	/* Maybe i should have uses a "proper" hashing algorithm here instead
+	 * of making one up myself, seems to be working ok though. */
+	for(i = 1; i < len; i++) {
+		/* shifts the ascii based value and adds it to previous value
+		 * shift amount is mod 24 because long int is 32 bit and data
+		 * to be shifted is 8, dont want to shift data to where it has
+		 * no effect*/
+		hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24)); 
 	}
+	*start = (unsigned int) hash_num % hash_prime;
+	*decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1));
+}
 
-	p = xstrdup(dependsstr);
-	while (*p != 0 && *p != '\n') {
-		if (*p != ' ') {
-			if (*p == ',') {
-				*p = 0;
-				dependsvec[++i] = 0;
-			} else {
-				if (dependsvec[i] == 0) {
-					dependsvec[i] = p;
-				}
-			}
+/* this adds the key to the hash table */
+int search_name_hashtable(const char *key)
+{
+	unsigned int probe_address = 0;
+	unsigned int probe_decrement = 0;
+
+	make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
+	while(name_hashtable[probe_address] != NULL) {
+		if (strcmp(name_hashtable[probe_address], key) == 0) {
+			return(probe_address);
 		} else {
-			*p = 0; /* eat the space... */
+			probe_address -= probe_decrement;
+			if ((int)probe_address < 0) {
+				probe_address += NAME_HASH_PRIME;
+			}
 		}
-		p++;
 	}
-	*p = 0;
+	name_hashtable[probe_address] = xstrdup(key);
 
-end:
-	dependsvec[i+1] = 0;
-	return dependsvec;
+	return(probe_address);
 }
 
-/* Topological sort algorithm:
- * ordered is the output list, pkgs is the dependency graph, pkg is 
- * the current node
- *
- * recursively add all the adjacent nodes to the ordered list, marking
- * each one as visited along the way
- *
- * yes, this algorithm looks a bit odd when all the params have the
- * same type :-)
+/* this DOESNT add the key to the hashtable
+ * TODO make it consistent with search_name_hashtable
  */
-static void depends_sort_visit(package_t **ordered, package_t *pkgs,
-		package_t *pkg)
+unsigned int search_status_hashtable(const char *key)
 {
-	unsigned short i;
-
-	/* mark node as processing */
-	pkg->color = color_grey;
-
-	/* visit each not-yet-visited node */
-	for (i = 0; i < pkg->requiredcount; i++)
-		if (pkg->requiredfor[i]->color == color_white)
-			depends_sort_visit(ordered, pkgs, pkg->requiredfor[i]);
-
-#if 0
-	/* add it to the list */
-	newnode = (struct package_t *)xmalloc(sizeof(struct package_t));
-	/* make a shallow copy */
-	*newnode = *pkg;
-	newnode->next = *ordered;
-	*ordered = newnode;
-#endif
-
-	pkg->next = *ordered;
-	*ordered = pkg;
-
-	/* mark node as done */
-	pkg->color = color_black;
+	unsigned int probe_address = 0;
+	unsigned int probe_decrement = 0;
+
+	make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
+	while(status_hashtable[probe_address] != NULL) {
+		if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
+			break;
+		} else {
+			probe_address -= probe_decrement;
+			if ((int)probe_address < 0) {
+				probe_address += STATUS_HASH_PRIME;
+			}
+		}
+	}
+	return(probe_address);
 }
 
-static package_t *depends_sort(package_t *pkgs)
+/* Need to rethink version comparison, maybe the official dpkg has something i can use ? */
+int version_compare_part(const char *version1, const char *version2)
 {
-	/* TODO: it needs to break cycles in the to-be-installed package 
-	 * graph... */
-	package_t *ordered = NULL;
-	package_t *pkg;
-
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		pkg->color = color_white;
+	int upstream_len1 = 0;
+	int upstream_len2 = 0;
+	char *name1_char;
+	char *name2_char;
+	int len1 = 0;
+	int len2 = 0;
+	int tmp_int;
+	int ver_num1;
+	int ver_num2;
+
+	if (version1 == NULL) {
+		version1 = xstrdup("");
+	}
+	if (version2 != NULL) {
+		version2 = xstrdup("");
 	}
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		if (pkg->color == color_white) {
-			depends_sort_visit(&ordered, pkgs, pkg);
+	upstream_len1 = strlen(version1);
+	upstream_len2 = strlen(version2);
+
+	while ((len1 < upstream_len1) || (len2 < upstream_len2)) {
+		/* Compare non-digit section */
+		tmp_int = strcspn(&version1[len1], "0123456789");
+		name1_char = xstrndup(&version1[len1], tmp_int);
+		len1 += tmp_int;
+		tmp_int = strcspn(&version2[len2], "0123456789");
+		name2_char = xstrndup(&version2[len2], tmp_int);
+		len2 += tmp_int;
+		tmp_int = strcmp(name1_char, name2_char);
+		free(name1_char);
+		free(name2_char);
+		if (tmp_int != 0) {
+			return(tmp_int);
+		}
+
+		/* Compare digits */
+		tmp_int = strspn(&version1[len1], "0123456789");
+		name1_char = xstrndup(&version1[len1], tmp_int);
+		len1 += tmp_int;
+		tmp_int = strspn(&version2[len2], "0123456789");
+		name2_char = xstrndup(&version2[len2], tmp_int);
+		len2 += tmp_int;
+		ver_num1 = atoi(name1_char);
+		ver_num2 = atoi(name2_char);
+		free(name1_char);
+		free(name2_char);
+		if (ver_num1 < ver_num2) {
+			return(-1);
 		}
+		else if (ver_num1 > ver_num2) {
+			return(1);
+		}
+	}
+	return(0);
+}
+
+/* if ver1 < ver2 return -1,
+ * if ver1 = ver2 return 0,
+ * if ver1 > ver2 return 1,
+ */
+int version_compare(const unsigned int ver1, const unsigned int ver2)
+{
+	char *ch_ver1 = name_hashtable[ver1];
+	char *ch_ver2 = name_hashtable[ver2];
+
+	char epoch1, epoch2;
+	char *deb_ver1, *deb_ver2;
+	char *ver1_ptr, *ver2_ptr;
+	char *upstream_ver1;
+	char *upstream_ver2;
+	int result;
+
+	/* Compare epoch */
+	if (ch_ver1[1] == ':') {
+		epoch1 = ch_ver1[0];
+		ver1_ptr = strchr(ch_ver1, ':') + 1;
+	} else {
+		epoch1 = '0';
+		ver1_ptr = ch_ver1;
+	}
+	if (ch_ver2[1] == ':') {
+		epoch2 = ch_ver2[0];
+		ver2_ptr = strchr(ch_ver2, ':') + 1;
+	} else {
+		epoch2 = '0';
+		ver2_ptr = ch_ver2;
+	}
+	if (epoch1 < epoch2) {
+		return(-1);
 	}
+	else if (epoch1 > epoch2) {
+		return(1);
+	}
+
+	/* Compare upstream version */
+	upstream_ver1 = xstrdup(ver1_ptr);
+	upstream_ver2 = xstrdup(ver2_ptr);
+
+	/* Chop off debian version, and store for later use */
+	deb_ver1 = strrchr(upstream_ver1, '-');
+	deb_ver2 = strrchr(upstream_ver2, '-');
+	if (deb_ver1) {
+		deb_ver1[0] = '\0';
+		deb_ver1++;
+	}
+	if (deb_ver2) {
+		deb_ver2[0] = '\0';
+		deb_ver2++;
+	}
+	result = version_compare_part(upstream_ver1, upstream_ver2);
+
+	free(upstream_ver1);
+	free(upstream_ver2);
 
-	/* Leaks the old list... return the new one... */
-	return ordered;
+	if (result != 0) {
+		return(result);
+	}
+
+	/* Compare debian versions */
+	return(version_compare_part(deb_ver1, deb_ver2));
+}
+
+int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator)
+{
+	const int version_result = version_compare(version1, version2);
+	switch(operator) {
+		case (VER_ANY):
+			return(TRUE);
+		case (VER_EQUAL):
+			if (version_result == 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_LESS):
+			if (version_result < 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_LESS_EQUAL):
+			if (version_result <= 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_MORE):
+			if (version_result > 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_MORE_EQUAL):
+			if (version_result >= 0) {
+				return(TRUE);
+			}
+			break;
+	}
+	return(FALSE);
 }
 
 
-/* resolve package dependencies -- 
- * for each package in the list of packages to be installed, we parse its 
- * dependency info to determine if the dependent packages are either 
- * already installed, or are scheduled to be installed. If both tests fail
- * than bail.
- *
- * The algorithm here is O(n^2*m) where n = number of packages to be 
- * installed and m is the # of dependencies per package. Not a terribly
- * efficient algorithm, but given that at any one time you are unlikely
- * to install a very large number of packages it doesn't really matter
- */
-static package_t *depends_resolve(package_t *pkgs, void *status)
+int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator)
 {
-	package_t *pkg, *chk;
-	package_t dependpkg;
-	char **dependsvec;
-	int i;
-	void *found;
-
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		dependsvec = depends_split(pkg->depends);
-		i = 0;
-		while (dependsvec[i] != 0) {
-			/* Check for dependencies; first look for installed packages */
-			dependpkg.package = dependsvec[i];
-			if (((found = tfind(&dependpkg, &status, package_compare)) == 0) ||
-			    ((chk = *(package_t **)found) && (chk->state_flag & state_flag_ok) &&
-				(chk->state_status & state_status_installed))) {
-
-				/* if it fails, we look through the list of packages we are going to 
-				 * install */
-				for (chk = pkgs; chk != 0; chk = chk->next) {
-					if (strcmp(chk->package, dependsvec[i]) == 0 || (chk->provides && 
-					     strncmp(chk->provides, dependsvec[i], strlen(dependsvec[i])) == 0)) {
-						if (chk->requiredcount >= DEPENDSMAX) {
-							error_msg("Too many dependencies for %s", chk->package);
-							return 0;
-						}
-						if (chk != pkg) {
-							chk->requiredfor[chk->requiredcount++] = pkg;
-						}
-						break;
-					}
-				}
-				if (chk == 0) {
-					error_msg("%s depends on %s, but it is not going to be installed", pkg->package, dependsvec[i]);
-					return 0;
-				}
+	unsigned int probe_address = 0;
+	unsigned int probe_decrement = 0;
+
+	make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
+	while(package_hashtable[probe_address] != NULL) {
+		if (package_hashtable[probe_address]->name == name) {
+			if (operator == VER_ANY) {
+				return(probe_address);
+			}
+			if (test_version(package_hashtable[probe_address]->version, version, operator)) {
+				return(probe_address);
 			}
-			i++;
+		}
+		probe_address -= probe_decrement;
+		if ((int)probe_address < 0) {
+			probe_address += PACKAGE_HASH_PRIME;
 		}
 	}
-
-	return depends_sort(pkgs);
+	return(probe_address);
 }
-#endif
-
-/* Status file handling routines
- * 
- * This is a fairly minimalistic implementation. there are two main functions 
- * that are supported:
- * 
- * 1) reading the entire status file:
- *    the status file is read into memory as a binary-tree, with just the 
- *    package and status info preserved
- *
- * 2) merging the status file
- *    control info from (new) packages is merged into the status file, 
- *    replacing any pre-existing entries. when a merge happens, status info 
- *    read using the status_read function is written back to the status file
+
+/*
+ * Create one new node and one new edge for every dependency.
  */
-static unsigned char status_parse(const char *line, const char **status_words)
+void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
 {
-	unsigned char status_num;
-	int i = 0;
+	char *line = xstrdup(whole_line);
+	char *line2;
+	char *line_ptr1 = NULL;
+	char *line_ptr2 = NULL;
+	char *field;
+	char *field2;
+	char *version;
+	edge_t *edge;
+	int offset_ch;
+	int type;
+
+	field = strtok_r(line, ",", &line_ptr1);
+	do {
+		line2 = xstrdup(field);
+		field2 = strtok_r(line2, "|", &line_ptr2);
+		if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) {
+			type = EDGE_OR_DEPENDS;
+		}
+		else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
+			type = EDGE_OR_PRE_DEPENDS;
+		} else {
+			type = edge_type;
+		}
+
+		do {
+			edge = (edge_t *) xmalloc(sizeof(edge_t));
+			edge->type = type;
+
+			/* Skip any extra leading spaces */
+			field2 += strspn(field2, " ");
+
+			/* Get dependency version info */
+			version = strchr(field2, '(');
+			if (version == NULL) {
+				edge->operator = VER_ANY;
+				/* Get the versions hash number, adding it if the number isnt already in there */
+				edge->version = search_name_hashtable("ANY");
+			} else {
+				/* Skip leading ' ' or '(' */
+				version += strspn(field2, " ");
+				version += strspn(version, "(");
+				/* Calculate length of any operator charactors */
+				offset_ch = strspn(version, "<=>");
+				/* Determine operator */
+				if (offset_ch > 0) {
+					if (strncmp(version, "=", offset_ch) == 0) {
+						edge->operator = VER_EQUAL;
+					}
+					else if (strncmp(version, "<<", offset_ch) == 0) {
+						edge->operator = VER_LESS;
+					}
+					else if (strncmp(version, "<=", offset_ch) == 0) {
+						edge->operator = VER_LESS_EQUAL;
+					}
+					else if (strncmp(version, ">>", offset_ch) == 0) {
+						edge->operator = VER_MORE;
+					}
+					else if (strncmp(version, ">=", offset_ch) == 0) {
+						edge->operator = VER_MORE_EQUAL;
+					} else {
+						error_msg_and_die("Illegal operator\n");
+					}
+				}
+				/* skip to start of version numbers */
+				version += offset_ch;
+				version += strspn(version, " ");
+
+				/* Truncate version at trailing ' ' or ')' */
+				version[strcspn(version, " )")] = '\0';
+				/* Get the versions hash number, adding it if the number isnt already in there */
+				edge->version = search_name_hashtable(version);
+			}
+
+			/* Get the dependency name */
+			field2[strcspn(field2, " (")] = '\0';
+			edge->name = search_name_hashtable(field2);
+	
+			/* link the new edge to the current node */
+			parent_node->num_of_edges++;
+			parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1));
+			parent_node->edge[parent_node->num_of_edges - 1] = edge;
+		} while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL);
+		free(line2);
+	} while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL);
+	free(line);
 
-	while (status_words[i] != 0) {
-		if (strncmp(line, status_words[i], strlen(status_words[i])) == 0) {
-			status_num = (char)i;
-			return(status_num);
+	return;
+}
+
+void free_package(common_node_t *node)
+{
+	int i;
+	if (node != NULL) {
+		for (i = 0; i < node->num_of_edges; i++) {
+			if (node->edge[i] != NULL) {
+				free(node->edge[i]);
+			}
+		}
+		if (node->edge != NULL) {
+			free(node->edge);
+		}
+		if (node != NULL) {
+			free(node);
 		}
-		i++;
 	}
-	/* parse error */
-	error_msg("Invalid status word");
-	return(0);
 }
 
-/*
- * Read the buffered control file and parse it,
- * filling parsed fields into the package structure
- */
-static int fill_package_struct(package_t *package, const char *package_buffer)
+unsigned int fill_package_struct(char *control_buffer)
 {
-	char *field = NULL;
+	common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t));
+
+	char *field;
+	char *field_name;
+	char *field_value;
 	int field_start = 0;
-	int field_length = 0;
+	int field_length;
+	int seperator_offset;
+	int num = -1;
+	int buffer_length = strlen(control_buffer);
+
+	new_node->version = search_name_hashtable("unknown");
+	while (field_start < buffer_length) {
+		field = read_package_field(&control_buffer[field_start]);
 
-	while ((field = read_package_field(&package_buffer[field_start])) != NULL) {
+		/* Setup start point for next field */
 		field_length = strlen(field);
 		field_start += (field_length + 1);
 
-		if (strlen(field) == 0) {
-			printf("empty line: *this shouldnt happen i dont think*\n");
-			break;
-		}
+		seperator_offset = strcspn(field, ":");
+		field_name = xstrndup(field, seperator_offset);
+		field_value = field + seperator_offset + 1;
+		field_value += strspn(field_value, " \n\t");
 
-		/* these are common to both installed and uninstalled packages */
-		if (strstr(field, "Package: ") == field) {
-			package->package = strdup(field + 9);
-		}
-		else if (strstr(field, "Depends: ") == field) {
-			package->depends = strdup(field + 9);
-		}
-		else if (strstr(field, "Provides: ") == field) {
-			package->provides = strdup(field + 10);
+		if (strcmp(field_name, "Package") == 0) {
+			new_node->name = search_name_hashtable(field_value);
 		}
-		/* This is specific to the Debian Installer. Ifdef? */
-		else if (strstr(field, "installer-menu-item: ") == field) {
-			package->installer_menu_item = atoi(field + 21);
+		else if (strcmp(field_name, "Version") == 0) {
+			new_node->version = search_name_hashtable(field_value);
 		}
-		else if (strstr(field, "Description: ") == field) {
-			package->description = strdup(field + 13);
+		else if (strcmp(field_name, "Pre-Depends") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
 		}
-		else if (strstr(field, "Priority: ") == field) {
-			package->priority = strdup(field + 10);
+		else if (strcmp(field_name, "Depends") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
 		}
-		else if (strstr(field, "Section: ") == field) {
-			package->section = strdup(field + 9);
+		else if (strcmp(field_name, "Replaces") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_REPLACES);
 		}
-		else if (strstr(field, "Installed-Size: ") == field) {
-			package->installed_size = strdup(field + 16);
+		else if (strcmp(field_name, "Provides") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
 		}
-		else if (strstr(field, "Maintainer: ") == field) {
-			package->maintainer = strdup(field + 12);
+		else if (strcmp(field_name, "Conflicts") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
 		}
-		else if (strstr(field, "Version: ") == field) {
-			package->version = strdup(field + 9);
-		}
-		else if (strstr(field, "Suggests: ") == field) {
-			package->suggests = strdup(field + 10);
-		}
-		else if (strstr(field, "Recommends: ") == field) {
-			package->recommends = strdup(field + 12);
-		}
-/*		else if (strstr(field, "Conffiles: ") == field) {
-			package->conffiles = read_block(file);
-				package->conffiles = xcalloc(1, 1);
-				while ((field = strtok(NULL, "\n")) != NULL) {
-					package->long_description = xrealloc(package->conffiles, 
-					strlen(package->conffiles) + strlen(field) + 1);
-					strcat(package->conffiles, field);
-				}
-			}
-*/
-		/* These are only in available file */
-		else if (strstr(field, "Architecture: ") == field) {
-			package->architecture = strdup(field + 14);
+		else if (strcmp(field_name, "Suggests") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
 		}
-		else if (strstr(field, "Filename: ") == field) {
-			package->filename = strdup(field + 10);
+		else if (strcmp(field_name, "Recommends") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
 		}
-		else if (strstr(field, "MD5sum ") == field) {
-			package->md5sum = strdup(field + 7);
+		else if (strcmp(field_name, "Enhances") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
 		}
-
-		/* This is only needed for status file */
-		if (strstr(field, "Status: ") == field) {
-			char *word_pointer;
-
-			word_pointer = strchr(field, ' ') + 1;
-			package->state_want = status_parse(word_pointer, state_words_want);
-			word_pointer = strchr(word_pointer, ' ') + 1;
-			package->state_flag = status_parse(word_pointer, state_words_flag);
-			word_pointer = strchr(word_pointer, ' ') + 1;
-			package->state_status = status_parse(word_pointer, state_words_status);
-		} else {
-			package->state_want = status_parse("purge", state_words_want);
-			package->state_flag = status_parse("ok", state_words_flag);
-			package->state_status = status_parse("not-installed", state_words_status);
-		}
-
+		free(field_name);
 		free(field);
 	}
-	return EXIT_SUCCESS;
+	if (new_node->version == search_name_hashtable("unknown")) {
+		free_package(new_node);
+		return(-1);
+	}
+	num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
+	if (package_hashtable[num] == NULL) {
+		package_hashtable[num] = new_node;
+	} else {
+		free_package(new_node);
+	}
+	return(num);
 }
 
-extern void write_package(FILE *out_file, package_t *pkg)
+/* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
+unsigned int get_status(const unsigned int status_node, const int num)
 {
-	if (pkg->package) {
-		fprintf(out_file, "Package: %s\n", pkg->package);
-	}
-	if ((pkg->state_want != 0) || (pkg->state_flag != 0)|| (pkg->state_status != 0)) {
-		fprintf(out_file, "Status: %s %s %s\n", 
-			state_words_want[pkg->state_want - 1],
-			state_words_flag[pkg->state_flag - 1],
-			state_words_status[pkg->state_status - 1]);
-	}
-	if (pkg->depends) {
-		fprintf(out_file, "Depends: %s\n", pkg->depends);
-	}
-	if (pkg->provides) {
-		fprintf(out_file, "Provides: %s\n", pkg->provides);
-	}
-	if (pkg->priority) {
-		fprintf(out_file, "Priority: %s\n", pkg->priority);
-	}
-	if (pkg->section) {
-		fprintf(out_file, "Section: %s\n", pkg->section);
-	}
-	if (pkg->section) {
-		fprintf(out_file, "Installed-Size: %s\n", pkg->installed_size);
-	}
-	if (pkg->maintainer) {
-		fprintf(out_file, "Maintainer: %s\n", pkg->maintainer);
-	}
-	if (pkg->source) {
-		fprintf(out_file, "Source: %s\n", pkg->source);
-	}
-	if (pkg->version) {
-		fprintf(out_file, "Version: %s\n", pkg->version);
-	}
-	if (pkg->pre_depends) {
-		fprintf(out_file, "Pre-depends: %s\n", pkg->pre_depends);
-	}
-	if (pkg->replaces) {
-		fprintf(out_file, "Replaces: %s\n", pkg->replaces);
-	}
-	if (pkg->recommends) {
-		fprintf(out_file, "Recommends: %s\n", pkg->recommends);
-	}
-	if (pkg->suggests) {
-		fprintf(out_file, "Suggests: %s\n", pkg->suggests);
-	}
-	if (pkg->conflicts) {
-		fprintf(out_file, "Conflicts: %s\n", pkg->conflicts);
-	}
-	if (pkg->conffiles) {
-		fprintf(out_file, "Conf-files: %s\n", pkg->conffiles);
-	}
-	if (pkg->architecture) {
-		fprintf(out_file, "Architecture: %s\n", pkg->architecture);
-	}
-	if (pkg->filename) {
-		fprintf(out_file, "Filename: %s\n", pkg->filename);
-	}
-	if (pkg->md5sum) {
-		fprintf(out_file, "MD5sum: %s\n", pkg->md5sum);
+	char *status_string = name_hashtable[status_hashtable[status_node]->status];
+	char *state_sub_string;
+	unsigned int state_sub_num;
+	int len;
+	int i;
+
+	/* set tmp_string to point to the start of the word number */
+	for (i = 1; i < num; i++) {
+		/* skip past a word */
+		status_string += strcspn(status_string, " ");
+		/* skip past the seperating spaces */
+		status_string += strspn(status_string, " ");
 	}
-	if (pkg->installer_menu_item) {
-		fprintf(out_file, "installer-main-menu %d\n", pkg->installer_menu_item);
+	len = strcspn(status_string, " \n\0");
+	state_sub_string = xstrndup(status_string, len);
+	state_sub_num = search_name_hashtable(state_sub_string);
+	free(state_sub_string);
+	return(state_sub_num);
+}
+
+void set_status(const unsigned int status_node_num, const char *new_value, const int position)
+{
+	const unsigned int new_value_len = strlen(new_value);
+	const unsigned int new_value_num = search_name_hashtable(new_value);
+	unsigned int want = get_status(status_node_num, 1);
+	unsigned int flag = get_status(status_node_num, 2);
+	unsigned int status = get_status(status_node_num, 3);
+	int want_len = strlen(name_hashtable[want]);
+	int flag_len = strlen(name_hashtable[flag]);
+	int status_len = strlen(name_hashtable[status]);
+	char *new_status;
+
+	switch (position) {
+		case (1):
+			want = new_value_num;
+			want_len = new_value_len;
+			break;
+		case (2):
+			flag = new_value_num;
+			flag_len = new_value_len;
+			break;
+		case (3):
+			status = new_value_num;
+			status_len = new_value_len;
+			break;
+		default:
+			error_msg_and_die("DEBUG ONLY: this shouldnt happen");
 	}
-	if (pkg->description) {
-		fprintf(out_file, "Description: %s\n", pkg->description);
+
+	new_status = (char *) xmalloc(want_len + flag_len + status_len + 3);
+	sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
+	status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
+	return;
+}
+
+void index_status_file(const char *filename)
+{
+	FILE *status_file;
+	char *control_buffer;
+	char *status_line;
+	status_node_t *status_node = NULL;
+	unsigned int status_num;
+
+	status_file = fopen(filename, "r");
+	while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) {
+		const unsigned int package_num = fill_package_struct(control_buffer);
+		if (package_num != -1) {
+			status_node = xmalloc(sizeof(status_node_t));
+			/* fill_package_struct doesnt handle the status field */
+			status_line = strstr(control_buffer, "Status:");
+			if (status_line != NULL) {
+				status_line += 7;
+				status_line += strspn(status_line, " \n\t");
+				status_line = xstrndup(status_line, strcspn(status_line, "\n\0"));
+				status_node->status = search_name_hashtable(status_line);
+				free(status_line);
+			}
+			status_node->package = package_num;
+			status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
+			status_hashtable[status_num] = status_node;
+		}
+		free(control_buffer);
 	}
-	fputc('\n', out_file);
-	pkg = pkg->next;
+	fclose(status_file);
+	return;
 }
 
-static void *status_read(void)
+
+char *get_depends_field(common_node_t *package, const int depends_type)
 {
-	FILE *f;
-	void *status = 0;
-	package_t *m = 0, *p = 0, *t = 0;
-	char *package_control_buffer = NULL;
+	char *depends = NULL;
+	char *old_sep = (char *)xcalloc(1, 3);
+	char *new_sep = (char *)xcalloc(1, 3);
+	int line_size = 0;
+	int depends_size;
 
-	if (getenv(udpkg_quiet) == NULL) {
-		printf("(Reading database...)\n");
-	}
+	int i;
 
-	if ((f = wfopen(statusfile, "r")) == NULL) {
-		return(NULL);
-	}
+	for (i = 0; i < package->num_of_edges; i++) {
+		if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) ||
+			(package->edge[i]->type == EDGE_OR_DEPENDS)) {
+		}
 
-	while ( (package_control_buffer = fgets_str(f, "\n\n")) != NULL) {
-		m = (package_t *)xcalloc(1, sizeof(package_t));
-		fill_package_struct(m, package_control_buffer);
-		if (m->package) {
-			/*
-			 * If there is an item in the tree by this name,
-			 * it must be a virtual package; insert real
-			 * package in preference.
-			 */
-			tdelete(m, &status, package_compare);
-			tsearch(m, &status, package_compare);
-			if (m->provides) {
-				/* 
-				 * A "Provides" triggers the insertion
-				 * of a pseudo package into the status
-				 * binary-tree.
-				 */
-				p = (package_t *)xcalloc(1, sizeof(package_t));
-				p->package = xstrdup(m->provides);
-				t = *(package_t **)tsearch(p, &status, package_compare);
-				if (t != p) {
-					free(p->package);
-					free(p);
+		if ((package->edge[i]->type == depends_type) ||
+			(package->edge[i]->type == depends_type + 1)) {
+			/* Check if its the first time through */
+
+			depends_size = 8 + strlen(name_hashtable[package->edge[i]->name])
+				+ strlen(name_hashtable[package->edge[i]->version]);
+			line_size += depends_size;
+			depends = (char *) xrealloc(depends, line_size + 1);
+
+			/* Check to see if this dependency is the type we are looking for
+			 * +1 to check for 'extra' types, e.g. ored dependecies */
+			strcpy(old_sep, new_sep);
+			if (package->edge[i]->type == depends_type) {
+				strcpy(new_sep, ", ");
+			}
+			else if (package->edge[i]->type == depends_type + 1) {
+				strcpy(new_sep, "| ");
+			}
+
+			if (depends_size == line_size) {
+				strcpy(depends, "");
+			} else {
+				if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) {
+					strcat(depends, " | ");
 				} else {
-					/*
-					 * Pseudo package status is the
-					 * same as the status of the
-					 * package providing it 
-					 * FIXME: (not quite right, if 2
-					 * packages of different statuses
-				 	 * provide it).
-				 	 */
-					t->state_want = m->state_want;
-					t->state_flag = m->state_flag;
-					t->state_status = m->state_status;
+					strcat(depends, ", ");
 				}
 			}
-		}
-		else {
-			free(m);
+
+			strcat(depends, name_hashtable[package->edge[i]->name]);
+			if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) {
+				if (package->edge[i]->operator == VER_EQUAL) {
+					strcat(depends, " (= ");
+				}
+				else if (package->edge[i]->operator == VER_LESS) {
+					strcat(depends, " (<< ");
+				}
+				else if (package->edge[i]->operator == VER_LESS_EQUAL) {
+					strcat(depends, " (<= ");
+				}
+				else if (package->edge[i]->operator == VER_MORE) {
+					strcat(depends, " (>> ");
+				}
+				else if (package->edge[i]->operator == VER_MORE_EQUAL) {
+					strcat(depends, " (>= ");
+				} else {
+					strcat(depends, " (");
+				}
+				strcat(depends, name_hashtable[package->edge[i]->version]);
+				strcat(depends, ")");
+			}
 		}
 	}
-	fclose(f);
-	return status;
+	return(depends);
 }
 
-static int status_merge(void *status, package_t *pkgs)
+/* This could do with a cleanup */
+void write_status_file(deb_file_t **deb_file)
 {
-	FILE *fin, *fout;
-	char *line = NULL;
-	package_t *pkg = 0, *statpkg = 0;
-	package_t locpkg;
+	FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r");
+	FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w");
+	char *package_name;
+	char *status_from_file;
+	char *control_buffer = NULL;
+	char *tmp_string;
+	char *field;
+	int status_num;
+	int field_length;
+	int field_start = 0;
+	int buffer_length;
+	int write_flag;
+	int i = 0;
 
-	if ((fout = wfopen(new_statusfile, "w")) == NULL) {
-		return 0;
-	}
-	if (getenv(udpkg_quiet) == NULL) {
-		printf("(Updating database...)\n");
-	}
+	/* Update previously known packages */
+	while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) {
+		tmp_string = strstr(control_buffer, "Package:") + 8;
+ 		tmp_string += strspn(tmp_string, " \n\t");
+		package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0"));
+		write_flag = FALSE;
+
+		tmp_string = strstr(control_buffer, "Status:");
+		if (tmp_string != NULL) {
+			/* Seperate the status value from the control buffer */
+			tmp_string += 7;
+			tmp_string += strspn(tmp_string, " \n\t");
+			status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
+		} else {
+			status_from_file = NULL;
+		}
 
-	/*
-	 * Dont use wfopen here, handle errors ourself
-	 */
-	if ((fin = fopen(statusfile, "r")) != NULL) {
-		while (((line = get_line_from_file(fin)) != NULL) && !feof(fin)) { 
-			chomp(line); /* trim newline */
-			/* If we see a package header, find out if it's a package
-			 * that we have processed. if so, we skip that block for
-			 * now (write it at the end).
-			 *
-			 * we also look at packages in the status cache and update
-			 * their status fields
-	 		 */
-			if (strstr(line, "Package: ") == line) {
-				for (pkg = pkgs; pkg != 0 && strcmp(line + 9,
-						pkg->package) != 0; pkg = pkg->next) ;
-
-				locpkg.package = line + 9;
-				statpkg = tfind(&locpkg, &status, package_compare);
-	
-				/* note: statpkg should be non-zero, unless the status
-				 * file was changed while we are processing (no locking
-				 * is currently done...
-				 */
-				if (statpkg != 0) {
-					statpkg = *(package_t **)statpkg;
+		/* Find this package in the status hashtable */
+		status_num = search_status_hashtable(package_name);
+		if (status_hashtable[status_num] != NULL) {
+			const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
+			if (strcmp(status_from_file, status_from_hashtable) != 0) {
+				/* New status isnt exactly the same as old status */
+				const int state_status = get_status(status_num, 3);
+				if ((strcmp("installed", name_hashtable[state_status]) == 0) ||
+					(strcmp("unpacked", name_hashtable[state_status]) == 0)) {
+					/* We need to add the control file from the package */
+					i = 0;
+					while(deb_file[i] != NULL) {
+						if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
+							char *last_char;
+							/* Write a status file entry with a modified status */
+							/* remove trailing \n's */
+							while(1) {
+								last_char = last_char_is(deb_file[i]->control_file, '\n');
+								if (last_char) {
+									*last_char = '\0';
+								} else {
+									break;
+								}
+							}
+							fputs(deb_file[i]->control_file, new_status_file);
+							set_status(status_num, "ok", 2);
+							fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
+							write_flag = TRUE;
+							break;
+						}
+						i++;
+					}
+					/* This is temperary, debugging only */
+					if (deb_file[i] == NULL) {
+						error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name);
+					}
+				}
+				else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
+					/* Only write the Package, Status, Priority and Section lines */
+					fprintf(new_status_file, "Package: %s\n", package_name);
+					fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
+					buffer_length = strlen(control_buffer);
+					while (field_start < buffer_length) {
+						field = read_package_field(&control_buffer[field_start]);
+						field_length = strlen(field);
+						field_start += (field_length + 1);
+						if (strncmp(field, "Priority:", 9) == 0) {
+							fprintf(new_status_file, "Priority:%s\n", field + 9);
+						}
+						if (strncmp(field, "Section:", 8) == 0) {
+							fprintf(new_status_file, "Section:%s\n", field + 8);
+						}
+					}
+					write_flag = TRUE;
+					fputs("\n", new_status_file);
+				}
+				else if	(strcmp("config-files", name_hashtable[state_status]) == 0) {
+					/* only change the status line */
+					buffer_length = strlen(control_buffer);
+					while (field_start < buffer_length) {
+						field = read_package_field(&control_buffer[field_start]);
+						/* Setup start point for next field */
+						field_length = strlen(field);
+						field_start += (field_length + 1);
+						if (strncmp(field, "Status:", 7) == 0) {
+							fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
+						} else {
+							fprintf(new_status_file, "%s\n", field);
+						}
+						free(field);
+					}
+					write_flag = TRUE;
+					fputs("\n", new_status_file);
 				}
 			}
-			if (pkg != 0) {
-				continue;
-			}
-			if (strstr(line, "Status: ") == line && statpkg != 0) {
-				snprintf(line, sizeof(line), "Status: %s %s %s",
-					state_words_want[statpkg->state_want - 1], 
-					state_words_flag[statpkg->state_flag - 1], 
-					state_words_status[statpkg->state_status - 1]);
+		}
+
+		/* If the package from the status file wasnt handle above, do it now*/
+		if (write_flag == FALSE) {
+			fprintf(new_status_file, "%s\n\n", control_buffer);
+		}
+
+		if (status_from_file != NULL) {
+			free(status_from_file);
+		}
+		free(package_name);
+		free(control_buffer);
+	}
+	/* Write any new packages */
+	for(i = 0; deb_file[i] != NULL; i++) {
+		status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
+		if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
+			char *last_char;
+			/* remove trailing \n's */
+			while(1) {
+				last_char = last_char_is(deb_file[i]->control_file, '\n');
+				if (last_char) {
+					*last_char = '\0';
+				} else {
+					break;
+				}
 			}
-			fprintf(fout, "%s\n", line);
+				
+			fputs(deb_file[i]->control_file, new_status_file);
+			set_status(status_num, "ok", 2);
+			fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
 		}
-		fclose(fin);
 	}
-	free(line);
+	fclose(old_status_file);
+	fclose(new_status_file);
 
-	// Print out packages we processed.
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		write_package(fout, pkg);
-	}
-	fclose(fout);
 
-	/*
-	 * Its ok if renaming statusfile fails becasue it doesnt exist
-	 */
-	if (rename(statusfile, bak_statusfile) == -1) {
+	/* Create a seperate backfile to dpkg */
+	if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
 		struct stat stat_buf;	
-		if (stat(statusfile, &stat_buf) == 0) {
-			error_msg("Couldnt create backup status file");
-			return(EXIT_FAILURE);
+		if (stat("/var/lib/dpkg/status", &stat_buf) == 0) {
+			error_msg_and_die("Couldnt create backup status file");
 		}
+		/* Its ok if renaming the status file fails becasue status 
+		 * file doesnt exist, maybe we are starting from scratch */
 		error_msg("No status file found, creating new one");
 	}
 
-	if (rename(new_statusfile, statusfile) == -1) {
-		error_msg("Couldnt create status file");
-		return(EXIT_FAILURE);
+	if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) {
+		error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file");
 	}
-	return(EXIT_SUCCESS);
 }
 
-static int is_file(const char *fn)
+int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
 {
-	struct stat statbuf;
+	int *conflicts = NULL;
+	int conflicts_num = 0;
+	int state_status;
+	int state_flag;
+	int state_want;
+	unsigned int status_package_num;
+	int i = deb_start;
+	int j, k;
+
+	/* Check for conflicts
+	 * TODO: TEST if conflicts with other packages to be installed
+	 *
+	 * Add install packages and the packages they provide
+	 * to the list of files to check conflicts for
+	 */
 
-	if (stat(fn, &statbuf) < 0) {
-		return 0;
+	/* Create array of package numbers to check against
+	 * installed package for conflicts*/
+	while (deb_file[i] != NULL) {
+		const unsigned int package_num = deb_file[i]->package;
+		conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
+		conflicts[conflicts_num] = package_num;
+		conflicts_num++;
+		/* add provides to conflicts list */
+		for (j = 0; j <	package_hashtable[package_num]->num_of_edges; j++) {
+			if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
+				const int conflicts_package_num = search_package_hashtable(
+					package_hashtable[package_num]->edge[j]->name,
+					package_hashtable[package_num]->edge[j]->version,
+					package_hashtable[package_num]->edge[j]->operator);
+				if (package_hashtable[conflicts_package_num] == NULL) {
+					/* create a new package */
+					common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t));
+					new_node->name = package_hashtable[package_num]->edge[j]->name;
+					new_node->version = package_hashtable[package_num]->edge[j]->version;
+					new_node->num_of_edges = 0;
+					new_node->edge = NULL;
+					package_hashtable[conflicts_package_num] = new_node;
+				}
+				conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
+				conflicts[conflicts_num] = conflicts_package_num;
+				conflicts_num++;
+			}
+		}
+		i++;
 	}
-	return S_ISREG(statbuf.st_mode);
+
+	/* Check conflicts */
+	for (i = 0; i < conflicts_num; i++) {
+		/* Check for conflicts */
+		for (j = 0; j < STATUS_HASH_PRIME; j++) {
+			if (status_hashtable[j] == NULL) {
+				continue;
+			}
+			state_flag = get_status(j, 2);
+			state_status = get_status(j, 3);
+			if ((state_status != search_name_hashtable("installed"))
+				&& (state_flag != search_name_hashtable("want-install"))) {
+				continue;
+			}
+			status_package_num = status_hashtable[j]->package;
+			for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) {
+				const edge_t *package_edge = package_hashtable[status_package_num]->edge[k];
+				if (package_edge->type != EDGE_CONFLICTS) {
+					continue;
+				}
+				if (package_edge->name != package_hashtable[conflicts[i]]->name) {
+					continue;
+				}
+				/* There is a conflict against the package name
+				 * check if version conflict as well */
+				if (test_version(package_hashtable[deb_file[i]->package]->version,
+						package_edge->version, package_edge->operator)) {
+					error_msg_and_die("Package %s conflict with %s",
+						name_hashtable[package_hashtable[deb_file[i]->package]->name],
+						name_hashtable[package_hashtable[status_package_num]->name]);
+				}
+			}
+		}
+	}
+
+	/* Check dependendcies */
+	i = 0;
+	while (deb_file[i] != NULL) {
+		const common_node_t *package_node = package_hashtable[deb_file[i]->package];
+		int status_num = 0;
+
+		for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) {
+			const edge_t *package_edge = package_node->edge[j];
+			const unsigned int package_num = search_package_hashtable(package_edge->name,
+				package_edge->version, package_edge->operator);
+
+			status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
+			state_status = get_status(status_num, 3);
+			state_want = get_status(status_num, 1);
+			switch (package_edge->type) {
+				case(EDGE_PRE_DEPENDS):
+				case(EDGE_OR_PRE_DEPENDS):
+					/* It must be already installed */
+					/* NOTE: This is untested, nothing apropriate in my status file */
+					if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) {
+						error_msg_and_die("Package %s pre-depends on %s, but it is not installed",
+							name_hashtable[package_node->name],
+							name_hashtable[package_edge->name]);
+					}
+					break;
+				case(EDGE_DEPENDS):
+				case(EDGE_OR_DEPENDS):
+					/* It must be already installed, or to be installed */
+					if ((package_hashtable[package_num] == NULL) ||
+						((state_status != search_name_hashtable("installed")) &&
+						(state_want != search_name_hashtable("want_install")))) {
+						error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed",
+							name_hashtable[package_node->name],
+							name_hashtable[package_edge->name]);
+					}
+					break;
+			}
+		}
+		i++;
+	}
+	return(TRUE);
 }
 
-static int dpkg_doconfigure(package_t *pkg)
+char **create_list(const char *filename)
 {
-	int r;
-	char postinst[1024];
-	char buf[1024];
-
-	DPRINTF("Configuring %s\n", pkg->package);
-	pkg->state_status = 0;
-	snprintf(postinst, sizeof(postinst), "%s%s.postinst", infodir, pkg->package);
+	FILE *list_stream;
+	char **file_list = xmalloc(sizeof(char *));
+	char *line = NULL;
+	char *last_char;
+	int length = 0;
+	int count = 0;
 
-	if (is_file(postinst)) {
-		snprintf(buf, sizeof(buf), "%s configure", postinst);
-		if ((r = do_system(buf)) != 0) {
-			error_msg("postinst exited with status %d\n", r);
-			pkg->state_status = state_status_halfconfigured;
-			return 1;
+	list_stream = fopen(filename, "r");
+	if (list_stream == NULL) {
+		return(NULL);
+	}
+	while (getline(&line, &length, list_stream) != -1) {
+		file_list = xrealloc(file_list, sizeof(char *) * (length + 1));
+		last_char = last_char_is(line, '\n');
+		if (last_char) {
+			*last_char = '\0';
 		}
+		file_list[count] = xstrdup(line);
+		free(line);
+		count++;
+		length = 0;
+	}
+	fclose(list_stream);
+	if (count == 0) {
+		return(NULL);
+	} else {
+		file_list[count] = NULL;
+		return(file_list);
 	}
-	pkg->state_status = state_status_installed;
-	
-	return 0;
 }
 
-static int dpkg_dounpack(package_t *pkg)
+/* maybe i should try and hook this into remove_file.c somehow */
+int remove_file_array(char **remove_names, char **exclude_names)
 {
-	FILE *out_stream;
-	char *info_prefix;
-	int status = TRUE;
-	int r = 0;
-
-	DPRINTF("Unpacking %s\n", pkg->package);
+	struct stat path_stat;
+	int match_flag;
+	int remove_flag = FALSE;
+	int i,j;
 
-	/* extract the data file */
-	deb_extract(pkg->filename, stdout, (extract_data_tar_gz | extract_all_to_fs), "/", NULL);
+	if (remove_names == NULL) {
+		return(FALSE);
+	}
+	for (i = 0; remove_names[i] != NULL; i++) {
+		match_flag = FALSE;
+		if (exclude_names != NULL) {
+			for (j = 0; exclude_names[j] != 0; j++) {
+				if (strcmp(remove_names[i], exclude_names[j]) == 0) {
+					match_flag = TRUE;
+					break;
+				}
+			}
+		}
+		if (!match_flag) {
+			if (lstat(remove_names[i], &path_stat) < 0) {
+				continue;
+			}
+			if (S_ISDIR(path_stat.st_mode)) {
+				if (rmdir(remove_names[i]) != -1) {
+					remove_flag = TRUE;
+				}
+			} else {
+				if (unlink(remove_names[i]) != -1) {
+					remove_flag = TRUE;
+				}
+			}
+		}
+	}
+	return(remove_flag);
+}
 
-	/* extract the control files */
-	info_prefix = (char *) malloc(strlen(pkg->package) + strlen(infodir) + 2 + 5 + 1);
-	sprintf(info_prefix, "%s/%s.", infodir, pkg->package);
-	deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL);
+int run_package_script(const char *package_name, const char *script_type)
+{
+	struct stat path_stat;
+	char *script_path;
 
-	/* Create the list file */
-	strcat(info_prefix, "list");
-	out_stream = wfopen(info_prefix, "w");			
-	deb_extract(pkg->filename, out_stream, (extract_data_tar_gz | extract_list), NULL, NULL);
-	fclose(out_stream);
+	script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21);
+	sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type);
 
-	pkg->state_want = state_want_install;
-	pkg->state_flag = state_flag_ok;
- 
-	if (status == TRUE) {
-		pkg->state_status = state_status_unpacked;
+	/* If the file doesnt exist is isnt a fatal */
+	if (lstat(script_path, &path_stat) < 0) {
+		return(EXIT_SUCCESS);
 	} else {
-		pkg->state_status = state_status_halfinstalled;
+		return(system(script_path));
 	}
-
-	return r;
 }
 
-/*
- * Extract and parse the control file from control.tar.gz
- */
-static int dpkg_read_control(package_t *pkg)
+void all_control_list(char **remove_files, const char *package_name)
 {
-	FILE *pkg_file;
-	char *control_buffer = NULL;
+	const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm",
+		"list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL };
+	int i;
 
-	if ((pkg_file = wfopen(pkg->filename, "r")) == NULL) {
-		return EXIT_FAILURE;
+	/* Create a list of all /var/lib/dpkg/info/<package> files */
+	for(i = 0; i < 10; i++) {
+		remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21);
+		sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]);
 	}
-	control_buffer = deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
-	fill_package_struct(pkg, control_buffer);
-	return EXIT_SUCCESS;
+	remove_files[10] = NULL;
 }
 
-static int dpkg_unpack(package_t *pkgs, void *status)
+void remove_package(const unsigned int package_num)
 {
-	int r = 0;
-	package_t *pkg;
-
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		dpkg_read_control(pkg);
-		if ((r = dpkg_dounpack(pkg)) != 0 ) {
-			break;
-		}
+	const char *package_name = name_hashtable[package_hashtable[package_num]->name];
+	const unsigned int status_num = search_status_hashtable(package_name);
+	const int package_name_length = strlen(package_name);
+	char **remove_files;
+	char **exclude_files;
+	char list_name[package_name_length + 25];
+	char conffile_name[package_name_length + 30];
+	int return_value;
+
+	/* run prerm script */
+	return_value = run_package_script(package_name, "prem");
+	if (return_value == -1) {
+		error_msg_and_die("script failed, prerm failure");
 	}
-	status_merge(status, pkgs);
 
-	return r;
-}
+	/* Create a list of files to remove, and a seperate list of those to keep */
+	sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
+	remove_files = create_list(list_name);
 
-static int dpkg_configure(package_t *pkgs, void *status)
-{
-	int r = 0;
-	void *found;
-	package_t *pkg;
+	sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name);
+	exclude_files = create_list(conffile_name);
 
-	for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next) {
-		found = tfind(pkg, &status, package_compare);
+	/* Some directories cant be removed straight away, so do multiple passes */
+	while (remove_file_array(remove_files, exclude_files) == TRUE);
 
-		if (found == 0) {
-			error_msg("Trying to configure %s, but it is not installed", pkg->package);
-			r = 1;
-		} 
-		/* configure the package listed in the status file;
-		 * not pkg, as we have info only for the latter
-		 */
-		else {
-			r = dpkg_doconfigure(*(package_t **)found);
-		}
-	}
-	status_merge(status, 0);
+	/* Create a list of all /var/lib/dpkg/info/<package> files */
+	remove_files = xmalloc(11);
+	all_control_list(remove_files, package_name);
 
-	return r;
+	/* Create a list of files in /var/lib/dpkg/info/<package>.* to keep  */
+	exclude_files = xmalloc(sizeof(char*) * 3);
+	exclude_files[0] = xstrdup(conffile_name);
+	exclude_files[1] = xmalloc(package_name_length + 27);
+	sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name);
+	exclude_files[2] = NULL;
+
+	remove_file_array(remove_files, exclude_files);
+
+	/* rename <package>.conffile to <package>.list */
+	rename(conffile_name, list_name);
+
+	/* Change package status */
+	set_status(status_num, "deinstall", 1);
+	set_status(status_num, "config-files", 3);
 }
 
-static int dpkg_install(package_t *pkgs, void *status)
+void purge_package(const unsigned int package_num)
 {
-	package_t *p, *ordered = 0;
-
-	/* Stage 1: parse all the control information */
-	for (p = pkgs; p != 0; p = p->next) {
-		dpkg_read_control(p);
+	const char *package_name = name_hashtable[package_hashtable[package_num]->name];
+	const unsigned int status_num = search_status_hashtable(package_name);
+	char **remove_files;
+	char **exclude_files;
+	char list_name[strlen(package_name) + 25];
+
+	/* run prerm script */
+	if (run_package_script(package_name, "prerm") == -1) {
+		error_msg_and_die("script failed, prerm failure");
 	}
 
-	/* Stage 2: resolve dependencies */
-#ifdef DODEPENDS
-	ordered = depends_resolve(pkgs, status);
-#else
-	ordered = pkgs;
-#endif
-	
-	/* Stage 3: install */
-	for (p = ordered; p != 0; p = p->next) {
-		p->state_want = state_want_install;
+	/* Create a list of files to remove */
+	sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
+	remove_files = create_list(list_name);
 
-		/* for now the flag is always set to ok... this is probably
-		 * not what we want
-		 */
-		p->state_flag = state_flag_ok;
+	exclude_files = xmalloc(1);
+	exclude_files[0] = NULL;
 
-		DPRINTF("Installing %s\n", p->package);
-		if (dpkg_dounpack(p) != 0) {
-			perror_msg(p->filename);
-		}
+	/* Some directories cant be removed straight away, so do multiple passes */
+	while (remove_file_array(remove_files, exclude_files) == TRUE);
 
-		if (dpkg_doconfigure(p) != 0) {
-			perror_msg(p->filename);
-		}
+	/* Create a list of all /var/lib/dpkg/info/<package> files */
+	remove_files = xmalloc(11);
+	all_control_list(remove_files, package_name);
+	remove_file_array(remove_files, exclude_files);
+
+	/* run postrm script */
+	if (run_package_script(package_name, "postrm") == -1) {
+		error_msg_and_die("postrm fialure.. set status to what?");
 	}
+	/* Change package status */
+	set_status(status_num, "purge", 1);
+	set_status(status_num, "not-installed", 3);
+}
+
+void unpack_package(deb_file_t *deb_file)
+{
+	const unsigned int package_name_num = package_hashtable[deb_file->package]->name;
+	const char *package_name = name_hashtable[package_name_num];
+	const unsigned int status_num = search_status_hashtable(package_name);
+	unsigned int status_package_num;
 
-	if (ordered != 0) {
-		status_merge(status, pkgs);
+	FILE *out_stream;
+	char *info_prefix;
+
+	/* If existing version, remove it first */
+	if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
+		/* Package is already installed, remove old version first */
+		printf("Preparing to replace %s %s (using %s) ...\n", package_name,
+			name_hashtable[package_hashtable[status_package_num]->version],
+			deb_file->filename);
+		remove_package(status_package_num);
+	} else {
+		printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
 	}
 
-	return 0;
+	/* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
+	info_prefix = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1);
+	sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name);
+	deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL);
+
+	/* Extract data.tar.gz to the root directory */
+	deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs), "/", NULL);
+
+	/* Create the list file */
+	strcat(info_prefix, "list");
+
+	out_stream = wfopen(info_prefix, "w");			
+	deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), NULL, NULL);
+	fclose(out_stream);
+
+	/* change status */
+	set_status(status_num, "install", 1);
+	set_status(status_num, "unpacked", 3);
 }
 
-/*
- * Not implemented yet
- *
-static int dpkg_remove(package_t *pkgs, void *status)
+void configure_package(deb_file_t *deb_file)
 {
-	package_t *p;
-
-	for (p = pkgs; p != 0; p = p->next)
-	{
+	int return_value;
+	int status_num;
+
+	/* Run the preinst prior to extracting */
+	return_value = run_package_script(name_hashtable[package_hashtable[deb_file->package]->name], "postinst");
+	if (return_value == -1) {
+		/* TODO: handle failure gracefully */
+		error_msg_and_die("postrm fialure.. set status to what?");
 	}
-	status_merge(status, 0);
 
-	return 0;
+	/* Change status to reflect success */
+	status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file->package]->name]);
+	set_status(status_num, "install", 1);
+	set_status(status_num, "installed", 3);
 }
-*/
 
 extern int dpkg_main(int argc, char **argv)
 {
-	const int arg_install = 1;
-	const int arg_unpack = 2;
-	const int arg_configure = 4;
-
-	package_t *p, *packages = NULL;
-	void *status = NULL;
-	int opt = 0;
-	int optflag = 0;
+	deb_file_t **deb_file = NULL;
+	status_node_t *status_node;
+	char opt = 0;
+	int package_num;
+	int dpkg_opt = 0;
+	int deb_count = 0;
+	int state_status;
+	int status_num;
+	int i;
 
-	while ((opt = getopt(argc, argv, "iruc")) != -1) {
+	while ((opt = getopt(argc, argv, "cF:ilPru")) != -1) {
 		switch (opt) {
+			case 'c':
+				dpkg_opt |= dpkg_opt_configure;
+				dpkg_opt |= dpkg_opt_package_name;
+				break;
+			case 'F': // equivalent to --force in official dpkg
+				if (strcmp(optarg, "depends") == 0) {
+					dpkg_opt |= dpkg_opt_force_ignore_depends;
+				}				
 			case 'i':
-				optflag |= arg_install;
+				dpkg_opt |= dpkg_opt_install;
+				dpkg_opt |= dpkg_opt_filename;
 				break;
-			case 'u':
-				optflag |= arg_unpack;
+			case 'l':
+				dpkg_opt |= dpkg_opt_list_installed;
+			case 'P':
+				dpkg_opt |= dpkg_opt_purge;
+				dpkg_opt |= dpkg_opt_package_name;
 				break;
-			case 'c':
-				optflag |= arg_configure;
+			case 'r':
+				dpkg_opt |= dpkg_opt_remove;
+				dpkg_opt |= dpkg_opt_package_name;
+				break;
+			case 'u':	/* Equivalent to --unpack in official dpkg */
+				dpkg_opt |= dpkg_opt_unpack;
+				dpkg_opt |= dpkg_opt_filename;
 				break;
 			default:
 				show_usage();
 		}
 	}
 
+	if ((argc == optind) || (dpkg_opt == 0)) {
+		show_usage();
+	} 
+
+	puts("(Reading database ... xxxxx files and directories installed.)");
+	index_status_file("/var/lib/dpkg/status");
+
+	/* Read arguments and store relevant info in structs */
+	deb_file = xmalloc(sizeof(deb_file_t));
 	while (optind < argc) {
-		p = (package_t *) xcalloc(1, sizeof(package_t));
-		if (optflag & arg_configure) {
-			p->package = xstrdup(argv[optind]);
-		} else {
-			p->filename = xstrdup(argv[optind]);
+		deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t));
+		if (dpkg_opt & dpkg_opt_filename) {
+			deb_file[deb_count]->filename = xstrdup(argv[optind]);
+			deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
+			if (deb_file[deb_count]->control_file == NULL) {
+				error_msg_and_die("Couldnt extract control file");
+			}
+			package_num = fill_package_struct(deb_file[deb_count]->control_file);
+
+			if (package_num == -1) {
+				error_msg("Invalid control file in %s", argv[optind]);
+				continue;
+			}
+			deb_file[deb_count]->package = (unsigned int) package_num;
+			/* Add the package to the status hashtable */
+			if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) {
+				status_node = (status_node_t *) xmalloc(sizeof(status_node_t));
+				status_node->package = deb_file[deb_count]->package;
+				/* use reinstreq isnt changed to "ok" until the package control info
+				 * is written to the status file*/
+				status_node->status = search_name_hashtable("install reinstreq not-installed");
+
+				status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
+				status_hashtable[status_num] = status_node;
+			}
 		}
-		p->next = packages;
-		packages = p;
+		else if (dpkg_opt & dpkg_opt_package_name) {
+			deb_file[deb_count]->filename = NULL;
+			deb_file[deb_count]->control_file = NULL;
+			deb_file[deb_count]->package = search_package_hashtable(
+				search_name_hashtable(argv[optind]),
+				search_name_hashtable("ANY"), VER_ANY);
+			if (package_hashtable[deb_file[deb_count]->package] == NULL) {
+				error_msg_and_die("unknown package, %s\n", argv[optind]);
+			}
+			state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
 
+			/* check package status is "installed" */
+			if (dpkg_opt & dpkg_opt_remove) {
+				if ((strcmp(name_hashtable[state_status], "not-installed") == 0) ||
+					(strcmp(name_hashtable[state_status], "config-files") == 0)) {
+					error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
+				}
+			}
+			else if (dpkg_opt & dpkg_opt_purge) {
+				/* if package status is "conf-files" then its ok */
+				if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
+					error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
+				}
+			}
+		}
+		deb_count++;
 		optind++;
 	}
+	deb_file[deb_count] = NULL;
 
-	make_directory((char *)infodir, S_IRWXU, FILEUTILS_RECUR);
+	/* Check that the deb file arguments are installable */
+	/* TODO: check dependencies before removing */
+	if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) {
+		if (!check_deps(deb_file, 0, deb_count)) {
+			error_msg_and_die("Dependency check fialed");
+		}
+	}
 
-	status = status_read();
+	for (i = 0; i < deb_count; i++) {
+		/* Remove or purge packages */
+		if (dpkg_opt & dpkg_opt_remove) {
+			remove_package(deb_file[i]->package);
+		}
+		else if (dpkg_opt & dpkg_opt_purge) {
+			purge_package(deb_file[i]->package);
+		}
+		else if (dpkg_opt & dpkg_opt_unpack) {
+			unpack_package(deb_file[i]);
+		}
+		else if (dpkg_opt & dpkg_opt_install) {
+			unpack_package(deb_file[i]);
+			configure_package(deb_file[i]);
+		}
+		else if (dpkg_opt & dpkg_opt_configure) {
+			configure_package(deb_file[i]);
+		}
+	}
 
-	if (optflag & arg_install) {
-		return dpkg_install(packages, status);
+	write_status_file(deb_file);
+
+	for (i = 0; i < NAME_HASH_PRIME; i++) {
+		if (name_hashtable[i] != NULL) {
+			free(name_hashtable[i]);
+		}
 	}
-	else if (optflag & arg_unpack) {
-		return dpkg_unpack(packages, status);
+	for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
+		free_package(package_hashtable[i]);
 	}
-	else if (optflag & arg_configure) {
-		return dpkg_configure(packages, status);
+	for (i = 0; i < STATUS_HASH_PRIME; i++) {
+		if (status_hashtable[i] != NULL) {
+			free(status_hashtable[i]);
+		}
 	}
+
 	return(EXIT_FAILURE);
 }
+
diff --git a/dpkg.c b/dpkg.c
index 020a68a90..ffe746703 100644
--- a/dpkg.c
+++ b/dpkg.c
@@ -1,854 +1,1423 @@
-#include <ctype.h>
-#include <dirent.h>
+/*
+ *  Mini dpkg implementation for busybox.
+ *  This is not meant as a replacemnt for dpkg
+ *
+ *  Copyright (C) 2001 by Glenn McGrath
+ * 		
+ *  Started life as a busybox implementation of udpkg
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Known difference between busybox dpkg and the official dpkg that i dont
+ * consider important, its worth keeping a note of differences anyway, just to
+ * make it easier to maintain.
+ *  - The first value for the Confflile: field isnt placed on a new line.
+ *  - The <package>.control file is extracted and kept in the info dir.
+ *  - When installing a package the Status: field is placed at the end of the
+ *      section, rather than just after the Package: field.
+ *  - Packages with previously unknown status are inserted at the begining of
+ *      the status file
+ *
+ * Bugs that need to be fixed
+ *  - (unknown, please let me know when you find any)
+ *
+ */
+
 #include <getopt.h>
-#include <stdio.h>
-#include <string.h>
 #include <stdlib.h>
-#include <search.h>
-#include <errno.h>
-#include <fcntl.h>
+#include <string.h>
 #include <unistd.h>
-#include <utime.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
 #include "busybox.h"
 
-#define DEPENDSMAX	64	/* maximum number of depends we can handle */
-
-/* Should we do full dependency checking? */
-//#define DODEPENDS 0
-
-/* Should we do debugging? */
-//#define DODEBUG 0
-
-#ifdef DODEBUG
-#define SYSTEM(x) do_system(x)
-#define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args)
-#else
-#define SYSTEM(x) system(x)
-#define DPRINTF(fmt,args...) /* nothing */
-#endif
-
-/* from dpkg-deb.c */
-
-static const char statusfile[] = "/var/lib/dpkg/status.udeb";
-static const char new_statusfile[] = "/var/lib/dpkg/status.udeb.new";
-static const char bak_statusfile[] = "/var/lib/dpkg/status.udeb.bak";
-
-static const char infodir[] = "/var/lib/dpkg/info/";
-static const char udpkg_quiet[] = "UDPKG_QUIET";
-
-//static const int status_want_unknown	= 1;
-static const int state_want_install	= 2;
-//static const int state_want_hold	= 3;
-//static const int state_want_deinstall	= 4;
-//static const int state_want_purge	= 5;
-
-static const int state_flag_ok	= 1;
-//static const int state_flag_reinstreq = 2; 
-//static const int state_flag_hold	= 3;
-//static const int state_flag_holdreinstreq = 4;
-
-//static const int state_statusnoninstalled = 1;
-static const int state_status_unpacked	= 2;
-static const int state_status_halfconfigured = 3; 
-static const int state_status_installed	= 4;
-static const int state_status_halfinstalled	= 5;
-//static const int state_statusconfigfiles	= 6;
-//static const int state_statuspostinstfailed	= 7;
-//static const int state_statusremovalfailed	= 8;
-
-static const char *state_words_want[] = { "unknown", "install", "hold", "deinstall", "purge", 0 };
-static const char *state_words_flag[] = { "ok", "reinstreq", "hold", "hold-reinstreq", 0 };
-static const char *state_words_status[] = { "not-installed", "unpacked", "half-configured", "installed", 
-		"half-installed", "config-files", "post-inst-failed", "removal-failed", 0 };
-
-static const int color_white	= 0;
-static const int color_grey	= 1;
-static const int color_black	= 2;
-
-/* data structures */ 
-typedef struct package_s {
-	char *filename;
-	char *package;
-	unsigned char state_want;
-	unsigned char state_flag;
-	unsigned char state_status;
-	char *depends;
-	char *provides;
-	char *description;
-	char *priority;
-	char *section;
-	char *installed_size;
-	char *maintainer;
-	char *source;
-	char *version;
-	char *pre_depends;
-	char *replaces;
-	char *recommends;
-	char *suggests;
-	char *conflicts;
-	char *conffiles;
-	char *long_description;
-	char *architecture;
-	char *md5sum;
-	int installer_menu_item;
-	char color; /* for topo-sort */
-	struct package_s *requiredfor[DEPENDSMAX]; 
-	unsigned short requiredcount;
-	struct package_s *next;
-} package_t;
-
-#ifdef DODEBUG
-static int do_system(const char *cmd)
-{
-	DPRINTF("cmd is %s\n", cmd);
-	return system(cmd);
-}
-#else
-#define do_system(cmd) system(cmd)
-#endif
+/* NOTE: If you vary HASH_PRIME sizes be aware,
+ * 1) Tweaking these will have a big effect on how much memory this program uses.
+ * 2) For computational efficiency these hash tables should be at least 20%
+ *    larger than the maximum number of elements stored in it.
+ * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking
+ *    for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
+ * 4) If you go bigger than 15 bits you may get into trouble (untested) as its
+ *    sometimes cast to an unsigned int, if you go to 16 bit you will overlap
+ *    int's and chaos is assured, 16381 is the max prime for 14 bit field
+ */
 
-static int package_compare(const void *p1, const void *p2)
-{
-	return strcmp(((package_t *)p1)->package, 
-		((package_t *)p2)->package);
-}
+/* NAME_HASH_PRIME, Stores package names and versions, 
+ * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
+ * as there a lot of duplicate version numbers */
+#define NAME_HASH_PRIME 16381
+char *name_hashtable[NAME_HASH_PRIME + 1];
+
+/* PACKAGE_HASH_PRIME, Maximum number of unique packages,
+ * It must not be smaller than STATUS_HASH_PRIME,
+ * Currently only packages from status_hashtable are stored in here, but in
+ * future this may be used to store packages not only from a status file,
+ * but an available_hashtable, and even multiple packages files.
+ * Package can be stored more than once if they have different versions.
+ * e.g. The same package may have different versions in the status file
+ *      and available file */
+#define PACKAGE_HASH_PRIME 10007
+typedef struct edge_s {
+	unsigned int operator:3;
+	unsigned int type:4;
+	unsigned int name:14;
+	unsigned int version:14;
+} edge_t;
+
+typedef struct common_node_s {
+	unsigned int name:14;
+	unsigned int version:14;
+	unsigned int num_of_edges:14;
+	edge_t **edge;
+} common_node_t;
+common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
+
+/* Currently it doesnt store packages that have state-status of not-installed
+ * So it only really has to be the size of the maximum number of packages
+ * likely to be installed at any one time, so there is a bit of leaway here */
+#define STATUS_HASH_PRIME 8191
+typedef struct status_node_s {
+	unsigned int package:14;	/* has to fit PACKAGE_HASH_PRIME */
+	unsigned int status:14;		/* has to fit STATUS_HASH_PRIME */
+} status_node_t;
+status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
+
+/* Even numbers are for 'extras', like ored dependecies or null */
+enum edge_type_e {
+	EDGE_NULL = 0,
+	EDGE_PRE_DEPENDS = 1,
+	EDGE_OR_PRE_DEPENDS = 2,
+	EDGE_DEPENDS = 3,
+	EDGE_OR_DEPENDS = 4,
+	EDGE_REPLACES = 5,
+	EDGE_PROVIDES = 7,
+	EDGE_CONFLICTS = 9,
+	EDGE_SUGGESTS = 11,
+	EDGE_RECOMMENDS = 13,
+	EDGE_ENHANCES = 15
+};
+enum operator_e {
+	VER_NULL = 0,
+	VER_EQUAL = 1,
+	VER_LESS = 2,
+	VER_LESS_EQUAL = 3,
+	VER_MORE = 4,
+	VER_MORE_EQUAL = 5,
+	VER_ANY = 6
+};
+
+enum dpkg_opt_e {
+	dpkg_opt_purge = 1,
+	dpkg_opt_remove = 2,
+	dpkg_opt_unpack = 4,
+	dpkg_opt_configure = 8,
+	dpkg_opt_install = 16,
+	dpkg_opt_package_name = 32,
+	dpkg_opt_filename = 64,
+	dpkg_opt_list_installed = 128,
+	dpkg_opt_force_ignore_depends = 256
+};
+
+typedef struct deb_file_s {
+	char *control_file;
+	char *filename;
+	unsigned int package:14;
+} deb_file_t;
 
-#ifdef DODEPENDS
 
-static char **depends_split(const char *dependsstr)
+void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime)
 {
-	static char *dependsvec[DEPENDSMAX];
-	char *p;
-	int i = 0;
+	unsigned long int hash_num = key[0];
+	int len = strlen(key);
+	int i;
 
-	dependsvec[0] = 0;
-	if (dependsstr == 0) {
-		goto end;
+	/* Maybe i should have uses a "proper" hashing algorithm here instead
+	 * of making one up myself, seems to be working ok though. */
+	for(i = 1; i < len; i++) {
+		/* shifts the ascii based value and adds it to previous value
+		 * shift amount is mod 24 because long int is 32 bit and data
+		 * to be shifted is 8, dont want to shift data to where it has
+		 * no effect*/
+		hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24)); 
 	}
+	*start = (unsigned int) hash_num % hash_prime;
+	*decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1));
+}
 
-	p = xstrdup(dependsstr);
-	while (*p != 0 && *p != '\n') {
-		if (*p != ' ') {
-			if (*p == ',') {
-				*p = 0;
-				dependsvec[++i] = 0;
-			} else {
-				if (dependsvec[i] == 0) {
-					dependsvec[i] = p;
-				}
-			}
+/* this adds the key to the hash table */
+int search_name_hashtable(const char *key)
+{
+	unsigned int probe_address = 0;
+	unsigned int probe_decrement = 0;
+
+	make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
+	while(name_hashtable[probe_address] != NULL) {
+		if (strcmp(name_hashtable[probe_address], key) == 0) {
+			return(probe_address);
 		} else {
-			*p = 0; /* eat the space... */
+			probe_address -= probe_decrement;
+			if ((int)probe_address < 0) {
+				probe_address += NAME_HASH_PRIME;
+			}
 		}
-		p++;
 	}
-	*p = 0;
+	name_hashtable[probe_address] = xstrdup(key);
 
-end:
-	dependsvec[i+1] = 0;
-	return dependsvec;
+	return(probe_address);
 }
 
-/* Topological sort algorithm:
- * ordered is the output list, pkgs is the dependency graph, pkg is 
- * the current node
- *
- * recursively add all the adjacent nodes to the ordered list, marking
- * each one as visited along the way
- *
- * yes, this algorithm looks a bit odd when all the params have the
- * same type :-)
+/* this DOESNT add the key to the hashtable
+ * TODO make it consistent with search_name_hashtable
  */
-static void depends_sort_visit(package_t **ordered, package_t *pkgs,
-		package_t *pkg)
+unsigned int search_status_hashtable(const char *key)
 {
-	unsigned short i;
-
-	/* mark node as processing */
-	pkg->color = color_grey;
-
-	/* visit each not-yet-visited node */
-	for (i = 0; i < pkg->requiredcount; i++)
-		if (pkg->requiredfor[i]->color == color_white)
-			depends_sort_visit(ordered, pkgs, pkg->requiredfor[i]);
-
-#if 0
-	/* add it to the list */
-	newnode = (struct package_t *)xmalloc(sizeof(struct package_t));
-	/* make a shallow copy */
-	*newnode = *pkg;
-	newnode->next = *ordered;
-	*ordered = newnode;
-#endif
-
-	pkg->next = *ordered;
-	*ordered = pkg;
-
-	/* mark node as done */
-	pkg->color = color_black;
+	unsigned int probe_address = 0;
+	unsigned int probe_decrement = 0;
+
+	make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
+	while(status_hashtable[probe_address] != NULL) {
+		if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
+			break;
+		} else {
+			probe_address -= probe_decrement;
+			if ((int)probe_address < 0) {
+				probe_address += STATUS_HASH_PRIME;
+			}
+		}
+	}
+	return(probe_address);
 }
 
-static package_t *depends_sort(package_t *pkgs)
+/* Need to rethink version comparison, maybe the official dpkg has something i can use ? */
+int version_compare_part(const char *version1, const char *version2)
 {
-	/* TODO: it needs to break cycles in the to-be-installed package 
-	 * graph... */
-	package_t *ordered = NULL;
-	package_t *pkg;
-
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		pkg->color = color_white;
+	int upstream_len1 = 0;
+	int upstream_len2 = 0;
+	char *name1_char;
+	char *name2_char;
+	int len1 = 0;
+	int len2 = 0;
+	int tmp_int;
+	int ver_num1;
+	int ver_num2;
+
+	if (version1 == NULL) {
+		version1 = xstrdup("");
+	}
+	if (version2 != NULL) {
+		version2 = xstrdup("");
 	}
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		if (pkg->color == color_white) {
-			depends_sort_visit(&ordered, pkgs, pkg);
+	upstream_len1 = strlen(version1);
+	upstream_len2 = strlen(version2);
+
+	while ((len1 < upstream_len1) || (len2 < upstream_len2)) {
+		/* Compare non-digit section */
+		tmp_int = strcspn(&version1[len1], "0123456789");
+		name1_char = xstrndup(&version1[len1], tmp_int);
+		len1 += tmp_int;
+		tmp_int = strcspn(&version2[len2], "0123456789");
+		name2_char = xstrndup(&version2[len2], tmp_int);
+		len2 += tmp_int;
+		tmp_int = strcmp(name1_char, name2_char);
+		free(name1_char);
+		free(name2_char);
+		if (tmp_int != 0) {
+			return(tmp_int);
+		}
+
+		/* Compare digits */
+		tmp_int = strspn(&version1[len1], "0123456789");
+		name1_char = xstrndup(&version1[len1], tmp_int);
+		len1 += tmp_int;
+		tmp_int = strspn(&version2[len2], "0123456789");
+		name2_char = xstrndup(&version2[len2], tmp_int);
+		len2 += tmp_int;
+		ver_num1 = atoi(name1_char);
+		ver_num2 = atoi(name2_char);
+		free(name1_char);
+		free(name2_char);
+		if (ver_num1 < ver_num2) {
+			return(-1);
 		}
+		else if (ver_num1 > ver_num2) {
+			return(1);
+		}
+	}
+	return(0);
+}
+
+/* if ver1 < ver2 return -1,
+ * if ver1 = ver2 return 0,
+ * if ver1 > ver2 return 1,
+ */
+int version_compare(const unsigned int ver1, const unsigned int ver2)
+{
+	char *ch_ver1 = name_hashtable[ver1];
+	char *ch_ver2 = name_hashtable[ver2];
+
+	char epoch1, epoch2;
+	char *deb_ver1, *deb_ver2;
+	char *ver1_ptr, *ver2_ptr;
+	char *upstream_ver1;
+	char *upstream_ver2;
+	int result;
+
+	/* Compare epoch */
+	if (ch_ver1[1] == ':') {
+		epoch1 = ch_ver1[0];
+		ver1_ptr = strchr(ch_ver1, ':') + 1;
+	} else {
+		epoch1 = '0';
+		ver1_ptr = ch_ver1;
+	}
+	if (ch_ver2[1] == ':') {
+		epoch2 = ch_ver2[0];
+		ver2_ptr = strchr(ch_ver2, ':') + 1;
+	} else {
+		epoch2 = '0';
+		ver2_ptr = ch_ver2;
+	}
+	if (epoch1 < epoch2) {
+		return(-1);
 	}
+	else if (epoch1 > epoch2) {
+		return(1);
+	}
+
+	/* Compare upstream version */
+	upstream_ver1 = xstrdup(ver1_ptr);
+	upstream_ver2 = xstrdup(ver2_ptr);
+
+	/* Chop off debian version, and store for later use */
+	deb_ver1 = strrchr(upstream_ver1, '-');
+	deb_ver2 = strrchr(upstream_ver2, '-');
+	if (deb_ver1) {
+		deb_ver1[0] = '\0';
+		deb_ver1++;
+	}
+	if (deb_ver2) {
+		deb_ver2[0] = '\0';
+		deb_ver2++;
+	}
+	result = version_compare_part(upstream_ver1, upstream_ver2);
+
+	free(upstream_ver1);
+	free(upstream_ver2);
 
-	/* Leaks the old list... return the new one... */
-	return ordered;
+	if (result != 0) {
+		return(result);
+	}
+
+	/* Compare debian versions */
+	return(version_compare_part(deb_ver1, deb_ver2));
+}
+
+int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator)
+{
+	const int version_result = version_compare(version1, version2);
+	switch(operator) {
+		case (VER_ANY):
+			return(TRUE);
+		case (VER_EQUAL):
+			if (version_result == 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_LESS):
+			if (version_result < 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_LESS_EQUAL):
+			if (version_result <= 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_MORE):
+			if (version_result > 0) {
+				return(TRUE);
+			}
+			break;
+		case (VER_MORE_EQUAL):
+			if (version_result >= 0) {
+				return(TRUE);
+			}
+			break;
+	}
+	return(FALSE);
 }
 
 
-/* resolve package dependencies -- 
- * for each package in the list of packages to be installed, we parse its 
- * dependency info to determine if the dependent packages are either 
- * already installed, or are scheduled to be installed. If both tests fail
- * than bail.
- *
- * The algorithm here is O(n^2*m) where n = number of packages to be 
- * installed and m is the # of dependencies per package. Not a terribly
- * efficient algorithm, but given that at any one time you are unlikely
- * to install a very large number of packages it doesn't really matter
- */
-static package_t *depends_resolve(package_t *pkgs, void *status)
+int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator)
 {
-	package_t *pkg, *chk;
-	package_t dependpkg;
-	char **dependsvec;
-	int i;
-	void *found;
-
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		dependsvec = depends_split(pkg->depends);
-		i = 0;
-		while (dependsvec[i] != 0) {
-			/* Check for dependencies; first look for installed packages */
-			dependpkg.package = dependsvec[i];
-			if (((found = tfind(&dependpkg, &status, package_compare)) == 0) ||
-			    ((chk = *(package_t **)found) && (chk->state_flag & state_flag_ok) &&
-				(chk->state_status & state_status_installed))) {
-
-				/* if it fails, we look through the list of packages we are going to 
-				 * install */
-				for (chk = pkgs; chk != 0; chk = chk->next) {
-					if (strcmp(chk->package, dependsvec[i]) == 0 || (chk->provides && 
-					     strncmp(chk->provides, dependsvec[i], strlen(dependsvec[i])) == 0)) {
-						if (chk->requiredcount >= DEPENDSMAX) {
-							error_msg("Too many dependencies for %s", chk->package);
-							return 0;
-						}
-						if (chk != pkg) {
-							chk->requiredfor[chk->requiredcount++] = pkg;
-						}
-						break;
-					}
-				}
-				if (chk == 0) {
-					error_msg("%s depends on %s, but it is not going to be installed", pkg->package, dependsvec[i]);
-					return 0;
-				}
+	unsigned int probe_address = 0;
+	unsigned int probe_decrement = 0;
+
+	make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
+	while(package_hashtable[probe_address] != NULL) {
+		if (package_hashtable[probe_address]->name == name) {
+			if (operator == VER_ANY) {
+				return(probe_address);
+			}
+			if (test_version(package_hashtable[probe_address]->version, version, operator)) {
+				return(probe_address);
 			}
-			i++;
+		}
+		probe_address -= probe_decrement;
+		if ((int)probe_address < 0) {
+			probe_address += PACKAGE_HASH_PRIME;
 		}
 	}
-
-	return depends_sort(pkgs);
+	return(probe_address);
 }
-#endif
-
-/* Status file handling routines
- * 
- * This is a fairly minimalistic implementation. there are two main functions 
- * that are supported:
- * 
- * 1) reading the entire status file:
- *    the status file is read into memory as a binary-tree, with just the 
- *    package and status info preserved
- *
- * 2) merging the status file
- *    control info from (new) packages is merged into the status file, 
- *    replacing any pre-existing entries. when a merge happens, status info 
- *    read using the status_read function is written back to the status file
+
+/*
+ * Create one new node and one new edge for every dependency.
  */
-static unsigned char status_parse(const char *line, const char **status_words)
+void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
 {
-	unsigned char status_num;
-	int i = 0;
+	char *line = xstrdup(whole_line);
+	char *line2;
+	char *line_ptr1 = NULL;
+	char *line_ptr2 = NULL;
+	char *field;
+	char *field2;
+	char *version;
+	edge_t *edge;
+	int offset_ch;
+	int type;
+
+	field = strtok_r(line, ",", &line_ptr1);
+	do {
+		line2 = xstrdup(field);
+		field2 = strtok_r(line2, "|", &line_ptr2);
+		if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) {
+			type = EDGE_OR_DEPENDS;
+		}
+		else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
+			type = EDGE_OR_PRE_DEPENDS;
+		} else {
+			type = edge_type;
+		}
+
+		do {
+			edge = (edge_t *) xmalloc(sizeof(edge_t));
+			edge->type = type;
+
+			/* Skip any extra leading spaces */
+			field2 += strspn(field2, " ");
+
+			/* Get dependency version info */
+			version = strchr(field2, '(');
+			if (version == NULL) {
+				edge->operator = VER_ANY;
+				/* Get the versions hash number, adding it if the number isnt already in there */
+				edge->version = search_name_hashtable("ANY");
+			} else {
+				/* Skip leading ' ' or '(' */
+				version += strspn(field2, " ");
+				version += strspn(version, "(");
+				/* Calculate length of any operator charactors */
+				offset_ch = strspn(version, "<=>");
+				/* Determine operator */
+				if (offset_ch > 0) {
+					if (strncmp(version, "=", offset_ch) == 0) {
+						edge->operator = VER_EQUAL;
+					}
+					else if (strncmp(version, "<<", offset_ch) == 0) {
+						edge->operator = VER_LESS;
+					}
+					else if (strncmp(version, "<=", offset_ch) == 0) {
+						edge->operator = VER_LESS_EQUAL;
+					}
+					else if (strncmp(version, ">>", offset_ch) == 0) {
+						edge->operator = VER_MORE;
+					}
+					else if (strncmp(version, ">=", offset_ch) == 0) {
+						edge->operator = VER_MORE_EQUAL;
+					} else {
+						error_msg_and_die("Illegal operator\n");
+					}
+				}
+				/* skip to start of version numbers */
+				version += offset_ch;
+				version += strspn(version, " ");
+
+				/* Truncate version at trailing ' ' or ')' */
+				version[strcspn(version, " )")] = '\0';
+				/* Get the versions hash number, adding it if the number isnt already in there */
+				edge->version = search_name_hashtable(version);
+			}
+
+			/* Get the dependency name */
+			field2[strcspn(field2, " (")] = '\0';
+			edge->name = search_name_hashtable(field2);
+	
+			/* link the new edge to the current node */
+			parent_node->num_of_edges++;
+			parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1));
+			parent_node->edge[parent_node->num_of_edges - 1] = edge;
+		} while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL);
+		free(line2);
+	} while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL);
+	free(line);
 
-	while (status_words[i] != 0) {
-		if (strncmp(line, status_words[i], strlen(status_words[i])) == 0) {
-			status_num = (char)i;
-			return(status_num);
+	return;
+}
+
+void free_package(common_node_t *node)
+{
+	int i;
+	if (node != NULL) {
+		for (i = 0; i < node->num_of_edges; i++) {
+			if (node->edge[i] != NULL) {
+				free(node->edge[i]);
+			}
+		}
+		if (node->edge != NULL) {
+			free(node->edge);
+		}
+		if (node != NULL) {
+			free(node);
 		}
-		i++;
 	}
-	/* parse error */
-	error_msg("Invalid status word");
-	return(0);
 }
 
-/*
- * Read the buffered control file and parse it,
- * filling parsed fields into the package structure
- */
-static int fill_package_struct(package_t *package, const char *package_buffer)
+unsigned int fill_package_struct(char *control_buffer)
 {
-	char *field = NULL;
+	common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t));
+
+	char *field;
+	char *field_name;
+	char *field_value;
 	int field_start = 0;
-	int field_length = 0;
+	int field_length;
+	int seperator_offset;
+	int num = -1;
+	int buffer_length = strlen(control_buffer);
+
+	new_node->version = search_name_hashtable("unknown");
+	while (field_start < buffer_length) {
+		field = read_package_field(&control_buffer[field_start]);
 
-	while ((field = read_package_field(&package_buffer[field_start])) != NULL) {
+		/* Setup start point for next field */
 		field_length = strlen(field);
 		field_start += (field_length + 1);
 
-		if (strlen(field) == 0) {
-			printf("empty line: *this shouldnt happen i dont think*\n");
-			break;
-		}
+		seperator_offset = strcspn(field, ":");
+		field_name = xstrndup(field, seperator_offset);
+		field_value = field + seperator_offset + 1;
+		field_value += strspn(field_value, " \n\t");
 
-		/* these are common to both installed and uninstalled packages */
-		if (strstr(field, "Package: ") == field) {
-			package->package = strdup(field + 9);
-		}
-		else if (strstr(field, "Depends: ") == field) {
-			package->depends = strdup(field + 9);
-		}
-		else if (strstr(field, "Provides: ") == field) {
-			package->provides = strdup(field + 10);
+		if (strcmp(field_name, "Package") == 0) {
+			new_node->name = search_name_hashtable(field_value);
 		}
-		/* This is specific to the Debian Installer. Ifdef? */
-		else if (strstr(field, "installer-menu-item: ") == field) {
-			package->installer_menu_item = atoi(field + 21);
+		else if (strcmp(field_name, "Version") == 0) {
+			new_node->version = search_name_hashtable(field_value);
 		}
-		else if (strstr(field, "Description: ") == field) {
-			package->description = strdup(field + 13);
+		else if (strcmp(field_name, "Pre-Depends") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
 		}
-		else if (strstr(field, "Priority: ") == field) {
-			package->priority = strdup(field + 10);
+		else if (strcmp(field_name, "Depends") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
 		}
-		else if (strstr(field, "Section: ") == field) {
-			package->section = strdup(field + 9);
+		else if (strcmp(field_name, "Replaces") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_REPLACES);
 		}
-		else if (strstr(field, "Installed-Size: ") == field) {
-			package->installed_size = strdup(field + 16);
+		else if (strcmp(field_name, "Provides") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
 		}
-		else if (strstr(field, "Maintainer: ") == field) {
-			package->maintainer = strdup(field + 12);
+		else if (strcmp(field_name, "Conflicts") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
 		}
-		else if (strstr(field, "Version: ") == field) {
-			package->version = strdup(field + 9);
-		}
-		else if (strstr(field, "Suggests: ") == field) {
-			package->suggests = strdup(field + 10);
-		}
-		else if (strstr(field, "Recommends: ") == field) {
-			package->recommends = strdup(field + 12);
-		}
-/*		else if (strstr(field, "Conffiles: ") == field) {
-			package->conffiles = read_block(file);
-				package->conffiles = xcalloc(1, 1);
-				while ((field = strtok(NULL, "\n")) != NULL) {
-					package->long_description = xrealloc(package->conffiles, 
-					strlen(package->conffiles) + strlen(field) + 1);
-					strcat(package->conffiles, field);
-				}
-			}
-*/
-		/* These are only in available file */
-		else if (strstr(field, "Architecture: ") == field) {
-			package->architecture = strdup(field + 14);
+		else if (strcmp(field_name, "Suggests") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
 		}
-		else if (strstr(field, "Filename: ") == field) {
-			package->filename = strdup(field + 10);
+		else if (strcmp(field_name, "Recommends") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
 		}
-		else if (strstr(field, "MD5sum ") == field) {
-			package->md5sum = strdup(field + 7);
+		else if (strcmp(field_name, "Enhances") == 0) {
+			add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
 		}
-
-		/* This is only needed for status file */
-		if (strstr(field, "Status: ") == field) {
-			char *word_pointer;
-
-			word_pointer = strchr(field, ' ') + 1;
-			package->state_want = status_parse(word_pointer, state_words_want);
-			word_pointer = strchr(word_pointer, ' ') + 1;
-			package->state_flag = status_parse(word_pointer, state_words_flag);
-			word_pointer = strchr(word_pointer, ' ') + 1;
-			package->state_status = status_parse(word_pointer, state_words_status);
-		} else {
-			package->state_want = status_parse("purge", state_words_want);
-			package->state_flag = status_parse("ok", state_words_flag);
-			package->state_status = status_parse("not-installed", state_words_status);
-		}
-
+		free(field_name);
 		free(field);
 	}
-	return EXIT_SUCCESS;
+	if (new_node->version == search_name_hashtable("unknown")) {
+		free_package(new_node);
+		return(-1);
+	}
+	num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
+	if (package_hashtable[num] == NULL) {
+		package_hashtable[num] = new_node;
+	} else {
+		free_package(new_node);
+	}
+	return(num);
 }
 
-extern void write_package(FILE *out_file, package_t *pkg)
+/* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
+unsigned int get_status(const unsigned int status_node, const int num)
 {
-	if (pkg->package) {
-		fprintf(out_file, "Package: %s\n", pkg->package);
-	}
-	if ((pkg->state_want != 0) || (pkg->state_flag != 0)|| (pkg->state_status != 0)) {
-		fprintf(out_file, "Status: %s %s %s\n", 
-			state_words_want[pkg->state_want - 1],
-			state_words_flag[pkg->state_flag - 1],
-			state_words_status[pkg->state_status - 1]);
-	}
-	if (pkg->depends) {
-		fprintf(out_file, "Depends: %s\n", pkg->depends);
-	}
-	if (pkg->provides) {
-		fprintf(out_file, "Provides: %s\n", pkg->provides);
-	}
-	if (pkg->priority) {
-		fprintf(out_file, "Priority: %s\n", pkg->priority);
-	}
-	if (pkg->section) {
-		fprintf(out_file, "Section: %s\n", pkg->section);
-	}
-	if (pkg->section) {
-		fprintf(out_file, "Installed-Size: %s\n", pkg->installed_size);
-	}
-	if (pkg->maintainer) {
-		fprintf(out_file, "Maintainer: %s\n", pkg->maintainer);
-	}
-	if (pkg->source) {
-		fprintf(out_file, "Source: %s\n", pkg->source);
-	}
-	if (pkg->version) {
-		fprintf(out_file, "Version: %s\n", pkg->version);
-	}
-	if (pkg->pre_depends) {
-		fprintf(out_file, "Pre-depends: %s\n", pkg->pre_depends);
-	}
-	if (pkg->replaces) {
-		fprintf(out_file, "Replaces: %s\n", pkg->replaces);
-	}
-	if (pkg->recommends) {
-		fprintf(out_file, "Recommends: %s\n", pkg->recommends);
-	}
-	if (pkg->suggests) {
-		fprintf(out_file, "Suggests: %s\n", pkg->suggests);
-	}
-	if (pkg->conflicts) {
-		fprintf(out_file, "Conflicts: %s\n", pkg->conflicts);
-	}
-	if (pkg->conffiles) {
-		fprintf(out_file, "Conf-files: %s\n", pkg->conffiles);
-	}
-	if (pkg->architecture) {
-		fprintf(out_file, "Architecture: %s\n", pkg->architecture);
-	}
-	if (pkg->filename) {
-		fprintf(out_file, "Filename: %s\n", pkg->filename);
-	}
-	if (pkg->md5sum) {
-		fprintf(out_file, "MD5sum: %s\n", pkg->md5sum);
+	char *status_string = name_hashtable[status_hashtable[status_node]->status];
+	char *state_sub_string;
+	unsigned int state_sub_num;
+	int len;
+	int i;
+
+	/* set tmp_string to point to the start of the word number */
+	for (i = 1; i < num; i++) {
+		/* skip past a word */
+		status_string += strcspn(status_string, " ");
+		/* skip past the seperating spaces */
+		status_string += strspn(status_string, " ");
 	}
-	if (pkg->installer_menu_item) {
-		fprintf(out_file, "installer-main-menu %d\n", pkg->installer_menu_item);
+	len = strcspn(status_string, " \n\0");
+	state_sub_string = xstrndup(status_string, len);
+	state_sub_num = search_name_hashtable(state_sub_string);
+	free(state_sub_string);
+	return(state_sub_num);
+}
+
+void set_status(const unsigned int status_node_num, const char *new_value, const int position)
+{
+	const unsigned int new_value_len = strlen(new_value);
+	const unsigned int new_value_num = search_name_hashtable(new_value);
+	unsigned int want = get_status(status_node_num, 1);
+	unsigned int flag = get_status(status_node_num, 2);
+	unsigned int status = get_status(status_node_num, 3);
+	int want_len = strlen(name_hashtable[want]);
+	int flag_len = strlen(name_hashtable[flag]);
+	int status_len = strlen(name_hashtable[status]);
+	char *new_status;
+
+	switch (position) {
+		case (1):
+			want = new_value_num;
+			want_len = new_value_len;
+			break;
+		case (2):
+			flag = new_value_num;
+			flag_len = new_value_len;
+			break;
+		case (3):
+			status = new_value_num;
+			status_len = new_value_len;
+			break;
+		default:
+			error_msg_and_die("DEBUG ONLY: this shouldnt happen");
 	}
-	if (pkg->description) {
-		fprintf(out_file, "Description: %s\n", pkg->description);
+
+	new_status = (char *) xmalloc(want_len + flag_len + status_len + 3);
+	sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
+	status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
+	return;
+}
+
+void index_status_file(const char *filename)
+{
+	FILE *status_file;
+	char *control_buffer;
+	char *status_line;
+	status_node_t *status_node = NULL;
+	unsigned int status_num;
+
+	status_file = fopen(filename, "r");
+	while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) {
+		const unsigned int package_num = fill_package_struct(control_buffer);
+		if (package_num != -1) {
+			status_node = xmalloc(sizeof(status_node_t));
+			/* fill_package_struct doesnt handle the status field */
+			status_line = strstr(control_buffer, "Status:");
+			if (status_line != NULL) {
+				status_line += 7;
+				status_line += strspn(status_line, " \n\t");
+				status_line = xstrndup(status_line, strcspn(status_line, "\n\0"));
+				status_node->status = search_name_hashtable(status_line);
+				free(status_line);
+			}
+			status_node->package = package_num;
+			status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
+			status_hashtable[status_num] = status_node;
+		}
+		free(control_buffer);
 	}
-	fputc('\n', out_file);
-	pkg = pkg->next;
+	fclose(status_file);
+	return;
 }
 
-static void *status_read(void)
+
+char *get_depends_field(common_node_t *package, const int depends_type)
 {
-	FILE *f;
-	void *status = 0;
-	package_t *m = 0, *p = 0, *t = 0;
-	char *package_control_buffer = NULL;
+	char *depends = NULL;
+	char *old_sep = (char *)xcalloc(1, 3);
+	char *new_sep = (char *)xcalloc(1, 3);
+	int line_size = 0;
+	int depends_size;
 
-	if (getenv(udpkg_quiet) == NULL) {
-		printf("(Reading database...)\n");
-	}
+	int i;
 
-	if ((f = wfopen(statusfile, "r")) == NULL) {
-		return(NULL);
-	}
+	for (i = 0; i < package->num_of_edges; i++) {
+		if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) ||
+			(package->edge[i]->type == EDGE_OR_DEPENDS)) {
+		}
 
-	while ( (package_control_buffer = fgets_str(f, "\n\n")) != NULL) {
-		m = (package_t *)xcalloc(1, sizeof(package_t));
-		fill_package_struct(m, package_control_buffer);
-		if (m->package) {
-			/*
-			 * If there is an item in the tree by this name,
-			 * it must be a virtual package; insert real
-			 * package in preference.
-			 */
-			tdelete(m, &status, package_compare);
-			tsearch(m, &status, package_compare);
-			if (m->provides) {
-				/* 
-				 * A "Provides" triggers the insertion
-				 * of a pseudo package into the status
-				 * binary-tree.
-				 */
-				p = (package_t *)xcalloc(1, sizeof(package_t));
-				p->package = xstrdup(m->provides);
-				t = *(package_t **)tsearch(p, &status, package_compare);
-				if (t != p) {
-					free(p->package);
-					free(p);
+		if ((package->edge[i]->type == depends_type) ||
+			(package->edge[i]->type == depends_type + 1)) {
+			/* Check if its the first time through */
+
+			depends_size = 8 + strlen(name_hashtable[package->edge[i]->name])
+				+ strlen(name_hashtable[package->edge[i]->version]);
+			line_size += depends_size;
+			depends = (char *) xrealloc(depends, line_size + 1);
+
+			/* Check to see if this dependency is the type we are looking for
+			 * +1 to check for 'extra' types, e.g. ored dependecies */
+			strcpy(old_sep, new_sep);
+			if (package->edge[i]->type == depends_type) {
+				strcpy(new_sep, ", ");
+			}
+			else if (package->edge[i]->type == depends_type + 1) {
+				strcpy(new_sep, "| ");
+			}
+
+			if (depends_size == line_size) {
+				strcpy(depends, "");
+			} else {
+				if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) {
+					strcat(depends, " | ");
 				} else {
-					/*
-					 * Pseudo package status is the
-					 * same as the status of the
-					 * package providing it 
-					 * FIXME: (not quite right, if 2
-					 * packages of different statuses
-				 	 * provide it).
-				 	 */
-					t->state_want = m->state_want;
-					t->state_flag = m->state_flag;
-					t->state_status = m->state_status;
+					strcat(depends, ", ");
 				}
 			}
-		}
-		else {
-			free(m);
+
+			strcat(depends, name_hashtable[package->edge[i]->name]);
+			if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) {
+				if (package->edge[i]->operator == VER_EQUAL) {
+					strcat(depends, " (= ");
+				}
+				else if (package->edge[i]->operator == VER_LESS) {
+					strcat(depends, " (<< ");
+				}
+				else if (package->edge[i]->operator == VER_LESS_EQUAL) {
+					strcat(depends, " (<= ");
+				}
+				else if (package->edge[i]->operator == VER_MORE) {
+					strcat(depends, " (>> ");
+				}
+				else if (package->edge[i]->operator == VER_MORE_EQUAL) {
+					strcat(depends, " (>= ");
+				} else {
+					strcat(depends, " (");
+				}
+				strcat(depends, name_hashtable[package->edge[i]->version]);
+				strcat(depends, ")");
+			}
 		}
 	}
-	fclose(f);
-	return status;
+	return(depends);
 }
 
-static int status_merge(void *status, package_t *pkgs)
+/* This could do with a cleanup */
+void write_status_file(deb_file_t **deb_file)
 {
-	FILE *fin, *fout;
-	char *line = NULL;
-	package_t *pkg = 0, *statpkg = 0;
-	package_t locpkg;
+	FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r");
+	FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w");
+	char *package_name;
+	char *status_from_file;
+	char *control_buffer = NULL;
+	char *tmp_string;
+	char *field;
+	int status_num;
+	int field_length;
+	int field_start = 0;
+	int buffer_length;
+	int write_flag;
+	int i = 0;
 
-	if ((fout = wfopen(new_statusfile, "w")) == NULL) {
-		return 0;
-	}
-	if (getenv(udpkg_quiet) == NULL) {
-		printf("(Updating database...)\n");
-	}
+	/* Update previously known packages */
+	while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) {
+		tmp_string = strstr(control_buffer, "Package:") + 8;
+ 		tmp_string += strspn(tmp_string, " \n\t");
+		package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0"));
+		write_flag = FALSE;
+
+		tmp_string = strstr(control_buffer, "Status:");
+		if (tmp_string != NULL) {
+			/* Seperate the status value from the control buffer */
+			tmp_string += 7;
+			tmp_string += strspn(tmp_string, " \n\t");
+			status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
+		} else {
+			status_from_file = NULL;
+		}
 
-	/*
-	 * Dont use wfopen here, handle errors ourself
-	 */
-	if ((fin = fopen(statusfile, "r")) != NULL) {
-		while (((line = get_line_from_file(fin)) != NULL) && !feof(fin)) { 
-			chomp(line); /* trim newline */
-			/* If we see a package header, find out if it's a package
-			 * that we have processed. if so, we skip that block for
-			 * now (write it at the end).
-			 *
-			 * we also look at packages in the status cache and update
-			 * their status fields
-	 		 */
-			if (strstr(line, "Package: ") == line) {
-				for (pkg = pkgs; pkg != 0 && strcmp(line + 9,
-						pkg->package) != 0; pkg = pkg->next) ;
-
-				locpkg.package = line + 9;
-				statpkg = tfind(&locpkg, &status, package_compare);
-	
-				/* note: statpkg should be non-zero, unless the status
-				 * file was changed while we are processing (no locking
-				 * is currently done...
-				 */
-				if (statpkg != 0) {
-					statpkg = *(package_t **)statpkg;
+		/* Find this package in the status hashtable */
+		status_num = search_status_hashtable(package_name);
+		if (status_hashtable[status_num] != NULL) {
+			const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
+			if (strcmp(status_from_file, status_from_hashtable) != 0) {
+				/* New status isnt exactly the same as old status */
+				const int state_status = get_status(status_num, 3);
+				if ((strcmp("installed", name_hashtable[state_status]) == 0) ||
+					(strcmp("unpacked", name_hashtable[state_status]) == 0)) {
+					/* We need to add the control file from the package */
+					i = 0;
+					while(deb_file[i] != NULL) {
+						if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
+							char *last_char;
+							/* Write a status file entry with a modified status */
+							/* remove trailing \n's */
+							while(1) {
+								last_char = last_char_is(deb_file[i]->control_file, '\n');
+								if (last_char) {
+									*last_char = '\0';
+								} else {
+									break;
+								}
+							}
+							fputs(deb_file[i]->control_file, new_status_file);
+							set_status(status_num, "ok", 2);
+							fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
+							write_flag = TRUE;
+							break;
+						}
+						i++;
+					}
+					/* This is temperary, debugging only */
+					if (deb_file[i] == NULL) {
+						error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name);
+					}
+				}
+				else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
+					/* Only write the Package, Status, Priority and Section lines */
+					fprintf(new_status_file, "Package: %s\n", package_name);
+					fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
+					buffer_length = strlen(control_buffer);
+					while (field_start < buffer_length) {
+						field = read_package_field(&control_buffer[field_start]);
+						field_length = strlen(field);
+						field_start += (field_length + 1);
+						if (strncmp(field, "Priority:", 9) == 0) {
+							fprintf(new_status_file, "Priority:%s\n", field + 9);
+						}
+						if (strncmp(field, "Section:", 8) == 0) {
+							fprintf(new_status_file, "Section:%s\n", field + 8);
+						}
+					}
+					write_flag = TRUE;
+					fputs("\n", new_status_file);
+				}
+				else if	(strcmp("config-files", name_hashtable[state_status]) == 0) {
+					/* only change the status line */
+					buffer_length = strlen(control_buffer);
+					while (field_start < buffer_length) {
+						field = read_package_field(&control_buffer[field_start]);
+						/* Setup start point for next field */
+						field_length = strlen(field);
+						field_start += (field_length + 1);
+						if (strncmp(field, "Status:", 7) == 0) {
+							fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
+						} else {
+							fprintf(new_status_file, "%s\n", field);
+						}
+						free(field);
+					}
+					write_flag = TRUE;
+					fputs("\n", new_status_file);
 				}
 			}
-			if (pkg != 0) {
-				continue;
-			}
-			if (strstr(line, "Status: ") == line && statpkg != 0) {
-				snprintf(line, sizeof(line), "Status: %s %s %s",
-					state_words_want[statpkg->state_want - 1], 
-					state_words_flag[statpkg->state_flag - 1], 
-					state_words_status[statpkg->state_status - 1]);
+		}
+
+		/* If the package from the status file wasnt handle above, do it now*/
+		if (write_flag == FALSE) {
+			fprintf(new_status_file, "%s\n\n", control_buffer);
+		}
+
+		if (status_from_file != NULL) {
+			free(status_from_file);
+		}
+		free(package_name);
+		free(control_buffer);
+	}
+	/* Write any new packages */
+	for(i = 0; deb_file[i] != NULL; i++) {
+		status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
+		if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
+			char *last_char;
+			/* remove trailing \n's */
+			while(1) {
+				last_char = last_char_is(deb_file[i]->control_file, '\n');
+				if (last_char) {
+					*last_char = '\0';
+				} else {
+					break;
+				}
 			}
-			fprintf(fout, "%s\n", line);
+				
+			fputs(deb_file[i]->control_file, new_status_file);
+			set_status(status_num, "ok", 2);
+			fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
 		}
-		fclose(fin);
 	}
-	free(line);
+	fclose(old_status_file);
+	fclose(new_status_file);
 
-	// Print out packages we processed.
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		write_package(fout, pkg);
-	}
-	fclose(fout);
 
-	/*
-	 * Its ok if renaming statusfile fails becasue it doesnt exist
-	 */
-	if (rename(statusfile, bak_statusfile) == -1) {
+	/* Create a seperate backfile to dpkg */
+	if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
 		struct stat stat_buf;	
-		if (stat(statusfile, &stat_buf) == 0) {
-			error_msg("Couldnt create backup status file");
-			return(EXIT_FAILURE);
+		if (stat("/var/lib/dpkg/status", &stat_buf) == 0) {
+			error_msg_and_die("Couldnt create backup status file");
 		}
+		/* Its ok if renaming the status file fails becasue status 
+		 * file doesnt exist, maybe we are starting from scratch */
 		error_msg("No status file found, creating new one");
 	}
 
-	if (rename(new_statusfile, statusfile) == -1) {
-		error_msg("Couldnt create status file");
-		return(EXIT_FAILURE);
+	if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) {
+		error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file");
 	}
-	return(EXIT_SUCCESS);
 }
 
-static int is_file(const char *fn)
+int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
 {
-	struct stat statbuf;
+	int *conflicts = NULL;
+	int conflicts_num = 0;
+	int state_status;
+	int state_flag;
+	int state_want;
+	unsigned int status_package_num;
+	int i = deb_start;
+	int j, k;
+
+	/* Check for conflicts
+	 * TODO: TEST if conflicts with other packages to be installed
+	 *
+	 * Add install packages and the packages they provide
+	 * to the list of files to check conflicts for
+	 */
 
-	if (stat(fn, &statbuf) < 0) {
-		return 0;
+	/* Create array of package numbers to check against
+	 * installed package for conflicts*/
+	while (deb_file[i] != NULL) {
+		const unsigned int package_num = deb_file[i]->package;
+		conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
+		conflicts[conflicts_num] = package_num;
+		conflicts_num++;
+		/* add provides to conflicts list */
+		for (j = 0; j <	package_hashtable[package_num]->num_of_edges; j++) {
+			if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
+				const int conflicts_package_num = search_package_hashtable(
+					package_hashtable[package_num]->edge[j]->name,
+					package_hashtable[package_num]->edge[j]->version,
+					package_hashtable[package_num]->edge[j]->operator);
+				if (package_hashtable[conflicts_package_num] == NULL) {
+					/* create a new package */
+					common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t));
+					new_node->name = package_hashtable[package_num]->edge[j]->name;
+					new_node->version = package_hashtable[package_num]->edge[j]->version;
+					new_node->num_of_edges = 0;
+					new_node->edge = NULL;
+					package_hashtable[conflicts_package_num] = new_node;
+				}
+				conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
+				conflicts[conflicts_num] = conflicts_package_num;
+				conflicts_num++;
+			}
+		}
+		i++;
 	}
-	return S_ISREG(statbuf.st_mode);
+
+	/* Check conflicts */
+	for (i = 0; i < conflicts_num; i++) {
+		/* Check for conflicts */
+		for (j = 0; j < STATUS_HASH_PRIME; j++) {
+			if (status_hashtable[j] == NULL) {
+				continue;
+			}
+			state_flag = get_status(j, 2);
+			state_status = get_status(j, 3);
+			if ((state_status != search_name_hashtable("installed"))
+				&& (state_flag != search_name_hashtable("want-install"))) {
+				continue;
+			}
+			status_package_num = status_hashtable[j]->package;
+			for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) {
+				const edge_t *package_edge = package_hashtable[status_package_num]->edge[k];
+				if (package_edge->type != EDGE_CONFLICTS) {
+					continue;
+				}
+				if (package_edge->name != package_hashtable[conflicts[i]]->name) {
+					continue;
+				}
+				/* There is a conflict against the package name
+				 * check if version conflict as well */
+				if (test_version(package_hashtable[deb_file[i]->package]->version,
+						package_edge->version, package_edge->operator)) {
+					error_msg_and_die("Package %s conflict with %s",
+						name_hashtable[package_hashtable[deb_file[i]->package]->name],
+						name_hashtable[package_hashtable[status_package_num]->name]);
+				}
+			}
+		}
+	}
+
+	/* Check dependendcies */
+	i = 0;
+	while (deb_file[i] != NULL) {
+		const common_node_t *package_node = package_hashtable[deb_file[i]->package];
+		int status_num = 0;
+
+		for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) {
+			const edge_t *package_edge = package_node->edge[j];
+			const unsigned int package_num = search_package_hashtable(package_edge->name,
+				package_edge->version, package_edge->operator);
+
+			status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
+			state_status = get_status(status_num, 3);
+			state_want = get_status(status_num, 1);
+			switch (package_edge->type) {
+				case(EDGE_PRE_DEPENDS):
+				case(EDGE_OR_PRE_DEPENDS):
+					/* It must be already installed */
+					/* NOTE: This is untested, nothing apropriate in my status file */
+					if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) {
+						error_msg_and_die("Package %s pre-depends on %s, but it is not installed",
+							name_hashtable[package_node->name],
+							name_hashtable[package_edge->name]);
+					}
+					break;
+				case(EDGE_DEPENDS):
+				case(EDGE_OR_DEPENDS):
+					/* It must be already installed, or to be installed */
+					if ((package_hashtable[package_num] == NULL) ||
+						((state_status != search_name_hashtable("installed")) &&
+						(state_want != search_name_hashtable("want_install")))) {
+						error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed",
+							name_hashtable[package_node->name],
+							name_hashtable[package_edge->name]);
+					}
+					break;
+			}
+		}
+		i++;
+	}
+	return(TRUE);
 }
 
-static int dpkg_doconfigure(package_t *pkg)
+char **create_list(const char *filename)
 {
-	int r;
-	char postinst[1024];
-	char buf[1024];
-
-	DPRINTF("Configuring %s\n", pkg->package);
-	pkg->state_status = 0;
-	snprintf(postinst, sizeof(postinst), "%s%s.postinst", infodir, pkg->package);
+	FILE *list_stream;
+	char **file_list = xmalloc(sizeof(char *));
+	char *line = NULL;
+	char *last_char;
+	int length = 0;
+	int count = 0;
 
-	if (is_file(postinst)) {
-		snprintf(buf, sizeof(buf), "%s configure", postinst);
-		if ((r = do_system(buf)) != 0) {
-			error_msg("postinst exited with status %d\n", r);
-			pkg->state_status = state_status_halfconfigured;
-			return 1;
+	list_stream = fopen(filename, "r");
+	if (list_stream == NULL) {
+		return(NULL);
+	}
+	while (getline(&line, &length, list_stream) != -1) {
+		file_list = xrealloc(file_list, sizeof(char *) * (length + 1));
+		last_char = last_char_is(line, '\n');
+		if (last_char) {
+			*last_char = '\0';
 		}
+		file_list[count] = xstrdup(line);
+		free(line);
+		count++;
+		length = 0;
+	}
+	fclose(list_stream);
+	if (count == 0) {
+		return(NULL);
+	} else {
+		file_list[count] = NULL;
+		return(file_list);
 	}
-	pkg->state_status = state_status_installed;
-	
-	return 0;
 }
 
-static int dpkg_dounpack(package_t *pkg)
+/* maybe i should try and hook this into remove_file.c somehow */
+int remove_file_array(char **remove_names, char **exclude_names)
 {
-	FILE *out_stream;
-	char *info_prefix;
-	int status = TRUE;
-	int r = 0;
-
-	DPRINTF("Unpacking %s\n", pkg->package);
+	struct stat path_stat;
+	int match_flag;
+	int remove_flag = FALSE;
+	int i,j;
 
-	/* extract the data file */
-	deb_extract(pkg->filename, stdout, (extract_data_tar_gz | extract_all_to_fs), "/", NULL);
+	if (remove_names == NULL) {
+		return(FALSE);
+	}
+	for (i = 0; remove_names[i] != NULL; i++) {
+		match_flag = FALSE;
+		if (exclude_names != NULL) {
+			for (j = 0; exclude_names[j] != 0; j++) {
+				if (strcmp(remove_names[i], exclude_names[j]) == 0) {
+					match_flag = TRUE;
+					break;
+				}
+			}
+		}
+		if (!match_flag) {
+			if (lstat(remove_names[i], &path_stat) < 0) {
+				continue;
+			}
+			if (S_ISDIR(path_stat.st_mode)) {
+				if (rmdir(remove_names[i]) != -1) {
+					remove_flag = TRUE;
+				}
+			} else {
+				if (unlink(remove_names[i]) != -1) {
+					remove_flag = TRUE;
+				}
+			}
+		}
+	}
+	return(remove_flag);
+}
 
-	/* extract the control files */
-	info_prefix = (char *) malloc(strlen(pkg->package) + strlen(infodir) + 2 + 5 + 1);
-	sprintf(info_prefix, "%s/%s.", infodir, pkg->package);
-	deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL);
+int run_package_script(const char *package_name, const char *script_type)
+{
+	struct stat path_stat;
+	char *script_path;
 
-	/* Create the list file */
-	strcat(info_prefix, "list");
-	out_stream = wfopen(info_prefix, "w");			
-	deb_extract(pkg->filename, out_stream, (extract_data_tar_gz | extract_list), NULL, NULL);
-	fclose(out_stream);
+	script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21);
+	sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type);
 
-	pkg->state_want = state_want_install;
-	pkg->state_flag = state_flag_ok;
- 
-	if (status == TRUE) {
-		pkg->state_status = state_status_unpacked;
+	/* If the file doesnt exist is isnt a fatal */
+	if (lstat(script_path, &path_stat) < 0) {
+		return(EXIT_SUCCESS);
 	} else {
-		pkg->state_status = state_status_halfinstalled;
+		return(system(script_path));
 	}
-
-	return r;
 }
 
-/*
- * Extract and parse the control file from control.tar.gz
- */
-static int dpkg_read_control(package_t *pkg)
+void all_control_list(char **remove_files, const char *package_name)
 {
-	FILE *pkg_file;
-	char *control_buffer = NULL;
+	const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm",
+		"list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL };
+	int i;
 
-	if ((pkg_file = wfopen(pkg->filename, "r")) == NULL) {
-		return EXIT_FAILURE;
+	/* Create a list of all /var/lib/dpkg/info/<package> files */
+	for(i = 0; i < 10; i++) {
+		remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21);
+		sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]);
 	}
-	control_buffer = deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
-	fill_package_struct(pkg, control_buffer);
-	return EXIT_SUCCESS;
+	remove_files[10] = NULL;
 }
 
-static int dpkg_unpack(package_t *pkgs, void *status)
+void remove_package(const unsigned int package_num)
 {
-	int r = 0;
-	package_t *pkg;
-
-	for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
-		dpkg_read_control(pkg);
-		if ((r = dpkg_dounpack(pkg)) != 0 ) {
-			break;
-		}
+	const char *package_name = name_hashtable[package_hashtable[package_num]->name];
+	const unsigned int status_num = search_status_hashtable(package_name);
+	const int package_name_length = strlen(package_name);
+	char **remove_files;
+	char **exclude_files;
+	char list_name[package_name_length + 25];
+	char conffile_name[package_name_length + 30];
+	int return_value;
+
+	/* run prerm script */
+	return_value = run_package_script(package_name, "prem");
+	if (return_value == -1) {
+		error_msg_and_die("script failed, prerm failure");
 	}
-	status_merge(status, pkgs);
 
-	return r;
-}
+	/* Create a list of files to remove, and a seperate list of those to keep */
+	sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
+	remove_files = create_list(list_name);
 
-static int dpkg_configure(package_t *pkgs, void *status)
-{
-	int r = 0;
-	void *found;
-	package_t *pkg;
+	sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name);
+	exclude_files = create_list(conffile_name);
 
-	for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next) {
-		found = tfind(pkg, &status, package_compare);
+	/* Some directories cant be removed straight away, so do multiple passes */
+	while (remove_file_array(remove_files, exclude_files) == TRUE);
 
-		if (found == 0) {
-			error_msg("Trying to configure %s, but it is not installed", pkg->package);
-			r = 1;
-		} 
-		/* configure the package listed in the status file;
-		 * not pkg, as we have info only for the latter
-		 */
-		else {
-			r = dpkg_doconfigure(*(package_t **)found);
-		}
-	}
-	status_merge(status, 0);
+	/* Create a list of all /var/lib/dpkg/info/<package> files */
+	remove_files = xmalloc(11);
+	all_control_list(remove_files, package_name);
 
-	return r;
+	/* Create a list of files in /var/lib/dpkg/info/<package>.* to keep  */
+	exclude_files = xmalloc(sizeof(char*) * 3);
+	exclude_files[0] = xstrdup(conffile_name);
+	exclude_files[1] = xmalloc(package_name_length + 27);
+	sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name);
+	exclude_files[2] = NULL;
+
+	remove_file_array(remove_files, exclude_files);
+
+	/* rename <package>.conffile to <package>.list */
+	rename(conffile_name, list_name);
+
+	/* Change package status */
+	set_status(status_num, "deinstall", 1);
+	set_status(status_num, "config-files", 3);
 }
 
-static int dpkg_install(package_t *pkgs, void *status)
+void purge_package(const unsigned int package_num)
 {
-	package_t *p, *ordered = 0;
-
-	/* Stage 1: parse all the control information */
-	for (p = pkgs; p != 0; p = p->next) {
-		dpkg_read_control(p);
+	const char *package_name = name_hashtable[package_hashtable[package_num]->name];
+	const unsigned int status_num = search_status_hashtable(package_name);
+	char **remove_files;
+	char **exclude_files;
+	char list_name[strlen(package_name) + 25];
+
+	/* run prerm script */
+	if (run_package_script(package_name, "prerm") == -1) {
+		error_msg_and_die("script failed, prerm failure");
 	}
 
-	/* Stage 2: resolve dependencies */
-#ifdef DODEPENDS
-	ordered = depends_resolve(pkgs, status);
-#else
-	ordered = pkgs;
-#endif
-	
-	/* Stage 3: install */
-	for (p = ordered; p != 0; p = p->next) {
-		p->state_want = state_want_install;
+	/* Create a list of files to remove */
+	sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
+	remove_files = create_list(list_name);
 
-		/* for now the flag is always set to ok... this is probably
-		 * not what we want
-		 */
-		p->state_flag = state_flag_ok;
+	exclude_files = xmalloc(1);
+	exclude_files[0] = NULL;
 
-		DPRINTF("Installing %s\n", p->package);
-		if (dpkg_dounpack(p) != 0) {
-			perror_msg(p->filename);
-		}
+	/* Some directories cant be removed straight away, so do multiple passes */
+	while (remove_file_array(remove_files, exclude_files) == TRUE);
 
-		if (dpkg_doconfigure(p) != 0) {
-			perror_msg(p->filename);
-		}
+	/* Create a list of all /var/lib/dpkg/info/<package> files */
+	remove_files = xmalloc(11);
+	all_control_list(remove_files, package_name);
+	remove_file_array(remove_files, exclude_files);
+
+	/* run postrm script */
+	if (run_package_script(package_name, "postrm") == -1) {
+		error_msg_and_die("postrm fialure.. set status to what?");
 	}
+	/* Change package status */
+	set_status(status_num, "purge", 1);
+	set_status(status_num, "not-installed", 3);
+}
+
+void unpack_package(deb_file_t *deb_file)
+{
+	const unsigned int package_name_num = package_hashtable[deb_file->package]->name;
+	const char *package_name = name_hashtable[package_name_num];
+	const unsigned int status_num = search_status_hashtable(package_name);
+	unsigned int status_package_num;
 
-	if (ordered != 0) {
-		status_merge(status, pkgs);
+	FILE *out_stream;
+	char *info_prefix;
+
+	/* If existing version, remove it first */
+	if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
+		/* Package is already installed, remove old version first */
+		printf("Preparing to replace %s %s (using %s) ...\n", package_name,
+			name_hashtable[package_hashtable[status_package_num]->version],
+			deb_file->filename);
+		remove_package(status_package_num);
+	} else {
+		printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
 	}
 
-	return 0;
+	/* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
+	info_prefix = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1);
+	sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name);
+	deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL);
+
+	/* Extract data.tar.gz to the root directory */
+	deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs), "/", NULL);
+
+	/* Create the list file */
+	strcat(info_prefix, "list");
+
+	out_stream = wfopen(info_prefix, "w");			
+	deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), NULL, NULL);
+	fclose(out_stream);
+
+	/* change status */
+	set_status(status_num, "install", 1);
+	set_status(status_num, "unpacked", 3);
 }
 
-/*
- * Not implemented yet
- *
-static int dpkg_remove(package_t *pkgs, void *status)
+void configure_package(deb_file_t *deb_file)
 {
-	package_t *p;
-
-	for (p = pkgs; p != 0; p = p->next)
-	{
+	int return_value;
+	int status_num;
+
+	/* Run the preinst prior to extracting */
+	return_value = run_package_script(name_hashtable[package_hashtable[deb_file->package]->name], "postinst");
+	if (return_value == -1) {
+		/* TODO: handle failure gracefully */
+		error_msg_and_die("postrm fialure.. set status to what?");
 	}
-	status_merge(status, 0);
 
-	return 0;
+	/* Change status to reflect success */
+	status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file->package]->name]);
+	set_status(status_num, "install", 1);
+	set_status(status_num, "installed", 3);
 }
-*/
 
 extern int dpkg_main(int argc, char **argv)
 {
-	const int arg_install = 1;
-	const int arg_unpack = 2;
-	const int arg_configure = 4;
-
-	package_t *p, *packages = NULL;
-	void *status = NULL;
-	int opt = 0;
-	int optflag = 0;
+	deb_file_t **deb_file = NULL;
+	status_node_t *status_node;
+	char opt = 0;
+	int package_num;
+	int dpkg_opt = 0;
+	int deb_count = 0;
+	int state_status;
+	int status_num;
+	int i;
 
-	while ((opt = getopt(argc, argv, "iruc")) != -1) {
+	while ((opt = getopt(argc, argv, "cF:ilPru")) != -1) {
 		switch (opt) {
+			case 'c':
+				dpkg_opt |= dpkg_opt_configure;
+				dpkg_opt |= dpkg_opt_package_name;
+				break;
+			case 'F': // equivalent to --force in official dpkg
+				if (strcmp(optarg, "depends") == 0) {
+					dpkg_opt |= dpkg_opt_force_ignore_depends;
+				}				
 			case 'i':
-				optflag |= arg_install;
+				dpkg_opt |= dpkg_opt_install;
+				dpkg_opt |= dpkg_opt_filename;
 				break;
-			case 'u':
-				optflag |= arg_unpack;
+			case 'l':
+				dpkg_opt |= dpkg_opt_list_installed;
+			case 'P':
+				dpkg_opt |= dpkg_opt_purge;
+				dpkg_opt |= dpkg_opt_package_name;
 				break;
-			case 'c':
-				optflag |= arg_configure;
+			case 'r':
+				dpkg_opt |= dpkg_opt_remove;
+				dpkg_opt |= dpkg_opt_package_name;
+				break;
+			case 'u':	/* Equivalent to --unpack in official dpkg */
+				dpkg_opt |= dpkg_opt_unpack;
+				dpkg_opt |= dpkg_opt_filename;
 				break;
 			default:
 				show_usage();
 		}
 	}
 
+	if ((argc == optind) || (dpkg_opt == 0)) {
+		show_usage();
+	} 
+
+	puts("(Reading database ... xxxxx files and directories installed.)");
+	index_status_file("/var/lib/dpkg/status");
+
+	/* Read arguments and store relevant info in structs */
+	deb_file = xmalloc(sizeof(deb_file_t));
 	while (optind < argc) {
-		p = (package_t *) xcalloc(1, sizeof(package_t));
-		if (optflag & arg_configure) {
-			p->package = xstrdup(argv[optind]);
-		} else {
-			p->filename = xstrdup(argv[optind]);
+		deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t));
+		if (dpkg_opt & dpkg_opt_filename) {
+			deb_file[deb_count]->filename = xstrdup(argv[optind]);
+			deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
+			if (deb_file[deb_count]->control_file == NULL) {
+				error_msg_and_die("Couldnt extract control file");
+			}
+			package_num = fill_package_struct(deb_file[deb_count]->control_file);
+
+			if (package_num == -1) {
+				error_msg("Invalid control file in %s", argv[optind]);
+				continue;
+			}
+			deb_file[deb_count]->package = (unsigned int) package_num;
+			/* Add the package to the status hashtable */
+			if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) {
+				status_node = (status_node_t *) xmalloc(sizeof(status_node_t));
+				status_node->package = deb_file[deb_count]->package;
+				/* use reinstreq isnt changed to "ok" until the package control info
+				 * is written to the status file*/
+				status_node->status = search_name_hashtable("install reinstreq not-installed");
+
+				status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
+				status_hashtable[status_num] = status_node;
+			}
 		}
-		p->next = packages;
-		packages = p;
+		else if (dpkg_opt & dpkg_opt_package_name) {
+			deb_file[deb_count]->filename = NULL;
+			deb_file[deb_count]->control_file = NULL;
+			deb_file[deb_count]->package = search_package_hashtable(
+				search_name_hashtable(argv[optind]),
+				search_name_hashtable("ANY"), VER_ANY);
+			if (package_hashtable[deb_file[deb_count]->package] == NULL) {
+				error_msg_and_die("unknown package, %s\n", argv[optind]);
+			}
+			state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
 
+			/* check package status is "installed" */
+			if (dpkg_opt & dpkg_opt_remove) {
+				if ((strcmp(name_hashtable[state_status], "not-installed") == 0) ||
+					(strcmp(name_hashtable[state_status], "config-files") == 0)) {
+					error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
+				}
+			}
+			else if (dpkg_opt & dpkg_opt_purge) {
+				/* if package status is "conf-files" then its ok */
+				if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
+					error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
+				}
+			}
+		}
+		deb_count++;
 		optind++;
 	}
+	deb_file[deb_count] = NULL;
 
-	make_directory((char *)infodir, S_IRWXU, FILEUTILS_RECUR);
+	/* Check that the deb file arguments are installable */
+	/* TODO: check dependencies before removing */
+	if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) {
+		if (!check_deps(deb_file, 0, deb_count)) {
+			error_msg_and_die("Dependency check fialed");
+		}
+	}
 
-	status = status_read();
+	for (i = 0; i < deb_count; i++) {
+		/* Remove or purge packages */
+		if (dpkg_opt & dpkg_opt_remove) {
+			remove_package(deb_file[i]->package);
+		}
+		else if (dpkg_opt & dpkg_opt_purge) {
+			purge_package(deb_file[i]->package);
+		}
+		else if (dpkg_opt & dpkg_opt_unpack) {
+			unpack_package(deb_file[i]);
+		}
+		else if (dpkg_opt & dpkg_opt_install) {
+			unpack_package(deb_file[i]);
+			configure_package(deb_file[i]);
+		}
+		else if (dpkg_opt & dpkg_opt_configure) {
+			configure_package(deb_file[i]);
+		}
+	}
 
-	if (optflag & arg_install) {
-		return dpkg_install(packages, status);
+	write_status_file(deb_file);
+
+	for (i = 0; i < NAME_HASH_PRIME; i++) {
+		if (name_hashtable[i] != NULL) {
+			free(name_hashtable[i]);
+		}
 	}
-	else if (optflag & arg_unpack) {
-		return dpkg_unpack(packages, status);
+	for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
+		free_package(package_hashtable[i]);
 	}
-	else if (optflag & arg_configure) {
-		return dpkg_configure(packages, status);
+	for (i = 0; i < STATUS_HASH_PRIME; i++) {
+		if (status_hashtable[i] != NULL) {
+			free(status_hashtable[i]);
+		}
 	}
+
 	return(EXIT_FAILURE);
 }
+