diff options
Diffstat (limited to 'dpkg.c')
| -rw-r--r-- | dpkg.c | 905 |
1 files changed, 905 insertions, 0 deletions
@@ -0,0 +1,905 @@ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <search.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <utime.h> +#include <sys/types.h> +#include <sys/stat.h> +#include "busybox.h" + +//#define PACKAGE "udpkg" +//#define VERSION "0.1" + +/* + * Should we do full dependency checking? + */ +#define DODEPENDS 1 + +/* + * Should we do debugging? + */ +#define DODEBUG 0 + +#ifdef DODEBUG +#include <assert.h> +#define ASSERT(x) assert(x) +#define SYSTEM(x) do_system(x) +#define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args) +#else +#define ASSERT(x) /* nothing */ +#define SYSTEM(x) system(x) +#define DPRINTF(fmt,args...) /* nothing */ +#endif + +#define BUFSIZE 4096 +#define ADMINDIR "/var/lib/dpkg" +#define STATUSFILE ADMINDIR ## "/status" +#define DPKGCIDIR ADMINDIR ## "/tmp.ci/" +#define INFODIR ADMINDIR ## "/info/" +#define UDPKG_QUIET "UDPKG_QUIET" +#define DEPENDSMAX 64 /* maximum number of depends we can handle */ + +#define STATUS_WANTSTART (0) +#define STATUS_WANTUNKNOWN (1 << 0) +#define STATUS_WANTINSTALL (1 << 1) +#define STATUS_WANTHOLD (1 << 2) +#define STATUS_WANTDEINSTALL (1 << 3) +#define STATUS_WANTPURGE (1 << 4) +#define STATUS_WANTMASK ~(STATUS_WANTUNKNOWN | STATUS_WANTINSTALL | STATUS_WANTHOLD | STATUS_WANTDEINSTALL | STATUS_WANTPURGE) + +#define STATUS_FLAGSTART (5) +#define STATUS_FLAGOK (1 << 5) +#define STATUS_FLAGREINSTREQ (1 << 6) +#define STATUS_FLAGHOLD (1 << 7) +#define STATUS_FLAGHOLDREINSTREQ (1 << 8) +#define STATUS_FLAGMASK ~(STATUS_FLAGOK | STATUS_FLAGREINSTREQ | STATUS_FLAGHOLD | STATUS_FLAGHOLDREINSTREQ) + +#define STATUS_STATUSSTART (9) +#define STATUS_STATUSNOTINSTALLED (1 << 9) +#define STATUS_STATUSUNPACKED (1 << 10) +#define STATUS_STATUSHALFCONFIGURED (1 << 11) +#define STATUS_STATUSINSTALLED (1 << 12) +#define STATUS_STATUSHALFINSTALLED (1 << 13) +#define STATUS_STATUSCONFIGFILES (1 << 14) +#define STATUS_STATUSPOSTINSTFAILED (1 << 15) +#define STATUS_STATUSREMOVALFAILED (1 << 16) +#define STATUS_STATUSMASK ~(STATUS_STATUSNOTINSTALLED | STATUS_STATUSUNPACKED | STATUS_STATUSHALFCONFIGURED | STATUS_STATUSCONFIGFILES | STATUS_STATUSPOSTINSTFAILED | STATUS_STATUSREMOVALFAILED | STATUS_STATUSHALFINSTALLED) + +#define COLOR_WHITE 0 +#define COLOR_GRAY 1 +#define COLOR_BLACK 2 + +/* data structures */ +struct package_t { + char *file; + char *package; + char *version; + char *depends; + char *provides; + char *description; + int installer_menu_item; + unsigned long status; + char color; /* for topo-sort */ + struct package_t *requiredfor[DEPENDSMAX]; + unsigned short requiredcount; + struct package_t *next; +}; + +/* function prototypes */ +void *status_read(void); +void control_read(FILE *f, struct package_t *p); +int status_merge(void *status, struct package_t *pkgs); +int package_compare(const void *p1, const void *p2); +struct package_t *depends_resolve(struct package_t *pkgs, void *status); + +#ifdef DODEPENDS +#include <ctype.h> + +static char **depends_split(const char *dependsstr) +{ + static char *dependsvec[DEPENDSMAX]; + char *p; + int i = 0; + + dependsvec[0] = 0; + + if (dependsstr != 0) + { + p = strdup(dependsstr); + while (*p != 0 && *p != '\n') + { + if (*p != ' ') + { + if (*p == ',') + { + *p = 0; + dependsvec[++i] = 0; + } + else if (dependsvec[i] == 0) + dependsvec[i] = p; + } + else + *p = 0; /* eat the space... */ + p++; + } + *p = 0; + } + dependsvec[i+1] = 0; + return dependsvec; +} + +static void depends_sort_visit(struct package_t **ordered, + struct package_t *pkgs, struct package_t *pkg) +{ + /* 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 :-) + */ + unsigned short i; + + /* mark node as processing */ + pkg->color = COLOR_GRAY; + + /* 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 *)malloc(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; +} + +static struct package_t *depends_sort(struct package_t *pkgs) +{ + /* TODO: it needs to break cycles in the to-be-installed package + * graph... */ + struct package_t *ordered = NULL; + struct package_t *pkg; + + for (pkg = pkgs; pkg != 0; pkg = pkg->next) + pkg->color = COLOR_WHITE; + + for (pkg = pkgs; pkg != 0; pkg = pkg->next) + if (pkg->color == COLOR_WHITE) + depends_sort_visit(&ordered, pkgs, pkg); + + /* Leaks the old list... return the new one... */ + return ordered; +} + + +/* 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 + */ +struct package_t *depends_resolve(struct package_t *pkgs, void *status) +{ + struct package_t *pkg, *chk; + struct 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 = *(struct package_t **)found) && + (chk->status & (STATUS_FLAGOK | STATUS_STATUSINSTALLED)) != + (STATUS_FLAGOK | STATUS_STATUSINSTALLED))) + { + /* 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) + { + fprintf(stderr, "Too many dependencies for %s\n", + chk->package); + return 0; + } + if (chk != pkg) + chk->requiredfor[chk->requiredcount++] = pkg; + break; + } + } + if (chk == 0) + { + fprintf(stderr, "%s depends on %s, but it is not going to be installed\n", pkg->package, dependsvec[i]); + return 0; + } + } + i++; + } + } + + return depends_sort(pkgs); +} +#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 + */ + +static const char *statuswords[][10] = { + { (char *)STATUS_WANTSTART, "unknown", "install", "hold", + "deinstall", "purge", 0 }, + { (char *)STATUS_FLAGSTART, "ok", "reinstreq", "hold", + "hold-reinstreq", 0 }, + { (char *)STATUS_STATUSSTART, "not-installed", "unpacked", "half-configured", + "installed", "half-installed", + "config-files", "post-inst-failed", + "removal-failed", 0 } +}; + +int package_compare(const void *p1, const void *p2) +{ + return strcmp(((struct package_t *)p1)->package, + ((struct package_t *)p2)->package); +} + +static unsigned long status_parse(const char *line) +{ + char *p; + int i, j; + unsigned long l = 0; + for (i = 0; i < 3; i++) + { + p = strchr(line, ' '); + if (p) *p = 0; + j = 1; + while (statuswords[i][j] != 0) + { + if (strcmp(line, statuswords[i][j]) == 0) + { + l |= (1 << ((int)statuswords[i][0] + j - 1)); + break; + } + j++; + } + if (statuswords[i][j] == 0) return 0; /* parse error */ + line = p+1; + } + return l; +} + +static const char *status_print(unsigned long flags) +{ + /* this function returns a static buffer... */ + static char buf[256]; + int i, j; + + buf[0] = 0; + for (i = 0; i < 3; i++) + { + j = 1; + while (statuswords[i][j] != 0) + { + if ((flags & (1 << ((int)statuswords[i][0] + j - 1))) != 0) + { + strcat(buf, statuswords[i][j]); + if (i < 2) strcat(buf, " "); + break; + } + j++; + } + if (statuswords[i][j] == 0) + { + fprintf(stderr, "corrupted status flag!!\n"); + return NULL; + } + } + return buf; +} + +/* + * Read a control file (or a stanza of a status file) and parse it, + * filling parsed fields into the package structure + */ +void control_read(FILE *f, struct package_t *p) +{ + char buf[BUFSIZE]; + while (fgets(buf, BUFSIZE, f) && !feof(f)) + { + buf[strlen(buf)-1] = 0; + if (*buf == 0) + return; + else if (strstr(buf, "Package: ") == buf) + { + p->package = strdup(buf+9); + } + else if (strstr(buf, "Status: ") == buf) + { + p->status = status_parse(buf+8); + } + else if (strstr(buf, "Depends: ") == buf) + { + p->depends = strdup(buf+9); + } + else if (strstr(buf, "Provides: ") == buf) + { + p->provides = strdup(buf+10); + } + /* This is specific to the Debian Installer. Ifdef? */ + else if (strstr(buf, "installer-menu-item: ") == buf) + { + p->installer_menu_item = atoi(buf+21); + } + else if (strstr(buf, "Description: ") == buf) + { + p->description = strdup(buf+13); + } + /* TODO: localized descriptions */ + } +} + +void *status_read(void) +{ + FILE *f; + void *status = 0; + struct package_t *m = 0, *p = 0, *t = 0; + + if ((f = fopen(STATUSFILE, "r")) == NULL) + { + perror(STATUSFILE); + return 0; + } + if (getenv(UDPKG_QUIET) == NULL) + printf("(Reading database...)\n"); + while (!feof(f)) + { + m = (struct package_t *)malloc(sizeof(struct package_t)); + memset(m, 0, sizeof(struct package_t)); + control_read(f, m); + 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 = (struct package_t *)malloc(sizeof(struct package_t)); + memset(p, 0, sizeof(struct package_t)); + p->package = strdup(m->provides); + + t = *(struct package_t **)tsearch(p, &status, package_compare); + if (!(t == p)) + { + free(p->package); + free(p); + } + 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->status = m->status; + } + } + } + else + { + free(m); + } + } + fclose(f); + return status; +} + +int status_merge(void *status, struct package_t *pkgs) +{ + FILE *fin, *fout; + char buf[BUFSIZE]; + struct package_t *pkg = 0, *statpkg = 0; + struct package_t locpkg; + int r = 0; + + if ((fin = fopen(STATUSFILE, "r")) == NULL) + { + perror(STATUSFILE); + return 0; + } + if ((fout = fopen(STATUSFILE ".new", "w")) == NULL) + { + perror(STATUSFILE ".new"); + return 0; + } + if (getenv(UDPKG_QUIET) == NULL) + printf("(Updating database...)\n"); + while (fgets(buf, BUFSIZE, fin) && !feof(fin)) + { + buf[strlen(buf)-1] = 0; /* 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(buf, "Package: ") == buf) + { + for (pkg = pkgs; pkg != 0 && strncmp(buf+9, + pkg->package, strlen(pkg->package))!=0; + pkg = pkg->next) ; + + locpkg.package = buf+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 = *(struct package_t **)statpkg; + } + if (pkg != 0) continue; + + if (strstr(buf, "Status: ") == buf && statpkg != 0) + { + snprintf(buf, sizeof(buf), "Status: %s", + status_print(statpkg->status)); + } + fputs(buf, fout); + fputc('\n', fout); + } + + // Print out packages we processed. + for (pkg = pkgs; pkg != 0; pkg = pkg->next) { + fprintf(fout, "Package: %s\nStatus: %s\n", + pkg->package, status_print(pkg->status)); + if (pkg->depends) + fprintf(fout, "Depends: %s\n", pkg->depends); + if (pkg->provides) + fprintf(fout, "Provides: %s\n", pkg->provides); + if (pkg->installer_menu_item) + fprintf(fout, "installer-menu-item: %i\n", pkg->installer_menu_item); + if (pkg->description) + fprintf(fout, "Description: %s\n", pkg->description); + fputc('\n', fout); + } + + fclose(fin); + fclose(fout); + + r = rename(STATUSFILE, STATUSFILE ".bak"); + if (r == 0) r = rename(STATUSFILE ".new", STATUSFILE); + return 0; +} + +#include <errno.h> +#include <fcntl.h> +#include <search.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <utime.h> +#include <sys/types.h> +#include <sys/stat.h> + +/* + * Main udpkg implementation routines + */ + +#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 + +static int is_file(const char *fn) +{ + struct stat statbuf; + + if (stat(fn, &statbuf) < 0) return 0; + return S_ISREG(statbuf.st_mode); +} + +static int dpkg_copyfile(const char *src, const char *dest) +{ + /* copy a (regular) file if it exists, preserving the mode, mtime + * and atime */ + char buf[8192]; + int infd, outfd; + int r; + struct stat srcStat; + struct utimbuf times; + + if (stat(src, &srcStat) < 0) + { + if (errno == 2) return 0; else return -1; + } + if ((infd = open(src, O_RDONLY)) < 0) + return -1; + if ((outfd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, srcStat.st_mode)) < 0) + return -1; + while ((r = read(infd, buf, sizeof(buf))) > 0) + { + if (write(outfd, buf, r) < 0) + return -1; + } + close(outfd); + close(infd); + if (r < 0) return -1; + times.actime = srcStat.st_atime; + times.modtime = srcStat.st_mtime; + if (utime(dest, ×) < 0) return -1; + return 1; +} + +static int dpkg_doconfigure(struct package_t *pkg) +{ + int r; + char postinst[1024]; + char buf[1024]; + DPRINTF("Configuring %s\n", pkg->package); + pkg->status &= STATUS_STATUSMASK; + snprintf(postinst, sizeof(postinst), "%s%s.postinst", INFODIR, pkg->package); + if (is_file(postinst)) + { + snprintf(buf, sizeof(buf), "%s configure", postinst); + if ((r = do_system(buf)) != 0) + { + fprintf(stderr, "postinst exited with status %d\n", r); + pkg->status |= STATUS_STATUSHALFCONFIGURED; + return 1; + } + } + + pkg->status |= STATUS_STATUSINSTALLED; + + return 0; +} + +static int dpkg_dounpack(struct package_t *pkg) +{ + int r = 0; + char *cwd, *p; + FILE *infp, *outfp; + char buf[1024], buf2[1024]; + int i; + char *adminscripts[] = { "prerm", "postrm", "preinst", "postinst", + "conffiles", "md5sums", "shlibs", + "templates" }; + + DPRINTF("Unpacking %s\n", pkg->package); + + cwd = getcwd(0, 0); + chdir("/"); + snprintf(buf, sizeof(buf), "ar -p %s data.tar.gz|zcat|tar -xf -", pkg->file); + if (SYSTEM(buf) == 0) + { + /* Installs the package scripts into the info directory */ + for (i = 0; i < sizeof(adminscripts) / sizeof(adminscripts[0]); + i++) + { + snprintf(buf, sizeof(buf), "%s%s/%s", + DPKGCIDIR, pkg->package, adminscripts[i]); + snprintf(buf2, sizeof(buf), "%s%s.%s", + INFODIR, pkg->package, adminscripts[i]); + if (dpkg_copyfile(buf, buf2) < 0) + { + fprintf(stderr, "Cannot copy %s to %s: %s\n", + buf, buf2, strerror(errno)); + r = 1; + break; + } + else + { + /* ugly hack to create the list file; should + * probably do something more elegant + * + * why oh why does dpkg create the list file + * so oddly... + */ + snprintf(buf, sizeof(buf), + "ar -p %s data.tar.gz|zcat|tar -tf -", + pkg->file); + snprintf(buf2, sizeof(buf2), + "%s%s.list", INFODIR, pkg->package); + if ((infp = popen(buf, "r")) == NULL || + (outfp = fopen(buf2, "w")) == NULL) + { + fprintf(stderr, "Cannot create %s\n", + buf2); + r = 1; + break; + } + while (fgets(buf, sizeof(buf), infp) && + !feof(infp)) + { + p = buf; + if (*p == '.') p++; + if (*p == '/' && *(p+1) == '\n') + { + *(p+1) = '.'; + *(p+2) = '\n'; + *(p+3) = 0; + } + if (p[strlen(p)-2] == '/') + { + p[strlen(p)-2] = '\n'; + p[strlen(p)-1] = 0; + } + fputs(p, outfp); + } + fclose(infp); + fclose(outfp); + } + } + pkg->status &= STATUS_WANTMASK; + pkg->status |= STATUS_WANTINSTALL; + pkg->status &= STATUS_FLAGMASK; + pkg->status |= STATUS_FLAGOK; + pkg->status &= STATUS_STATUSMASK; + if (r == 0) + pkg->status |= STATUS_STATUSUNPACKED; + else + pkg->status |= STATUS_STATUSHALFINSTALLED; + } + chdir(cwd); + return r; +} + +static int dpkg_doinstall(struct package_t *pkg) +{ + DPRINTF("Installing %s\n", pkg->package); + return (dpkg_dounpack(pkg) || dpkg_doconfigure(pkg)); +} + +static int dpkg_unpackcontrol(struct package_t *pkg) +{ + int r = 1; + char *cwd = 0; + char *p; + char buf[1024]; + FILE *f; + + p = strrchr(pkg->file, '/'); + if (p) p++; else p = pkg->file; + p = pkg->package = strdup(p); + while (*p != 0 && *p != '_' && *p != '.') p++; + *p = 0; + + cwd = getcwd(0, 0); + snprintf(buf, sizeof(buf), "%s%s", DPKGCIDIR, pkg->package); + DPRINTF("dir = %s\n", buf); + if (mkdir(buf, S_IRWXU) == 0 && chdir(buf) == 0) + { + snprintf(buf, sizeof(buf), "ar -p %s control.tar.gz|zcat|tar -xf -", + pkg->file); + if (SYSTEM(buf) == 0) + { + if ((f = fopen("control", "r")) != NULL) { + control_read(f, pkg); + r = 0; + } + } + } + + chdir(cwd); + free(cwd); + return r; +} + +static int dpkg_unpack(struct package_t *pkgs) +{ + int r = 0; + struct package_t *pkg; + void *status = status_read(); + + if (SYSTEM("rm -rf -- " DPKGCIDIR) != 0 || + mkdir(DPKGCIDIR, S_IRWXU) != 0) + { + perror("mkdir"); + return 1; + } + + for (pkg = pkgs; pkg != 0; pkg = pkg->next) + { + dpkg_unpackcontrol(pkg); + r = dpkg_dounpack(pkg); + if (r != 0) break; + } + status_merge(status, pkgs); + SYSTEM("rm -rf -- " DPKGCIDIR); + return r; +} + +static int dpkg_configure(struct package_t *pkgs) +{ + int r = 0; + void *found; + struct package_t *pkg; + void *status = status_read(); + for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next) + { + found = tfind(pkg, &status, package_compare); + if (found == 0) + { + fprintf(stderr, "Trying to configure %s, but it is not installed\n", pkg->package); + r = 1; + } + else + { + /* configure the package listed in the status file; + * not pkg, as we have info only for the latter */ + r = dpkg_doconfigure(*(struct package_t **)found); + } + } + status_merge(status, 0); + return r; +} + +static int dpkg_install(struct package_t *pkgs) +{ + struct package_t *p, *ordered = 0; + void *status = status_read(); + if (SYSTEM("rm -rf -- " DPKGCIDIR) != 0 || + mkdir(DPKGCIDIR, S_IRWXU) != 0) + { + perror("mkdir"); + return 1; + } + + /* Stage 1: parse all the control information */ + for (p = pkgs; p != 0; p = p->next) + if (dpkg_unpackcontrol(p) != 0) + { + perror(p->file); + /* force loop break, and prevents further ops */ + pkgs = 0; + } + + /* 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->status &= STATUS_WANTMASK; + p->status |= STATUS_WANTINSTALL; + + /* for now the flag is always set to ok... this is probably + * not what we want + */ + p->status &= STATUS_FLAGMASK; + p->status |= STATUS_FLAGOK; + + if (dpkg_doinstall(p) != 0) + { + perror(p->file); + } + } + + if (ordered != 0) + status_merge(status, pkgs); + SYSTEM("rm -rf -- " DPKGCIDIR); + return 0; +} + +static int dpkg_remove(struct package_t *pkgs) +{ + struct package_t *p; + void *status = status_read(); + for (p = pkgs; p != 0; p = p->next) + { + } + status_merge(status, 0); + return 0; +} + +int dpkg_main(int argc, char **argv) +{ + char opt = 0; + char *s; + struct package_t *p, *packages = NULL; + char *cwd = getcwd(0, 0); + while (*++argv) + { + if (**argv == '-') { + /* Nasty little hack to "parse" long options. */ + s = *argv; + while (*s == '-') + s++; + opt=s[0]; + } + else + { + p = (struct package_t *)malloc(sizeof(struct package_t)); + memset(p, 0, sizeof(struct package_t)); + if (**argv == '/') + p->file = *argv; + else if (opt != 'c') + { + p->file = malloc(strlen(cwd) + strlen(*argv) + 2); + sprintf(p->file, "%s/%s", cwd, *argv); + } + else { + p->package = strdup(*argv); + } + p->next = packages; + packages = p; + } + + } + switch (opt) + { + case 'i': return dpkg_install(packages); break; + case 'r': return dpkg_remove(packages); break; + case 'u': return dpkg_unpack(packages); break; + case 'c': return dpkg_configure(packages); break; + } + + /* if it falls through to here, some of the command line options were + wrong */ + usage(dpkg_usage); + return 0; +}
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