really add dpkg-deb.c this time

1 files changed, 159 insertions, 0 deletions

diff --git a/dpkg_deb.c b/dpkg_deb.c
new file mode 100644
index 000000000..b20cc2695
--- /dev/null
+++ b/dpkg_deb.c
@@ -0,0 +1,159 @@
+/*
+ *  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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include "busybox.h"
+
+typedef struct ar_headers_s {
+	char *name;
+	size_t size;
+	uid_t uid;
+	gid_t gid;
+	mode_t mode;
+	time_t mtime;
+	off_t offset;
+	struct ar_headers_s *next;
+} ar_headers_t;
+
+extern ar_headers_t get_headers(int srcFd);
+extern int tar_unzip_init(int tarFd);
+extern int readTarFile(int tarFd, int extractFlag, int listFlag, 
+		int tostdoutFlag, int verboseFlag, char** extractList,
+		char** excludeList);
+
+extern int dpkg_deb_main(int argc, char **argv)
+{
+	const int dpkg_deb_contents = 1;
+	const int dpkg_deb_control = 2;
+	const int dpkg_deb_info = 4;
+	const int dpkg_deb_extract = 8;
+	const int dpkg_deb_verbose_extract = 16;
+	int opt=0;
+	int optflag=0;	
+	int extract_flag = FALSE;
+	int list_flag = FALSE;
+	int verbose_flag = FALSE;
+	int extract_to_stdout = FALSE;
+	char ar_filename[15];
+	int srcFd=0;
+	int status=0;
+	ar_headers_t *ar_headers = NULL;
+	char **extract_list=NULL;
+	char *target_dir=NULL;
+	
+	while ((opt = getopt(argc, argv, "cexX")) != -1) {
+		switch (opt) {
+			case 'c':
+				optflag |= dpkg_deb_contents;
+				break;
+			case 'e':
+				optflag |= dpkg_deb_control;
+				break;
+/*			case 'I':
+				optflag |= dpkg_deb_info;
+				break;
+*/
+			case 'x':
+				optflag |= dpkg_deb_extract;
+				break;
+			case 'X':
+				optflag |= dpkg_deb_verbose_extract;
+				break;
+			default:
+				usage(dpkg_deb_usage);
+				return EXIT_FAILURE;
+		}
+	}
+
+	if (((optind + 1 ) > argc) || (optflag == 0))  {
+		usage(dpkg_deb_usage);
+		return(EXIT_FAILURE);
+	}
+	
+	if (optflag & dpkg_deb_contents) {
+		list_flag = TRUE;
+		verbose_flag = TRUE;
+		strcpy(ar_filename, "data.tar.gz");
+	}
+	else if (optflag & dpkg_deb_control) {
+		extract_flag = TRUE;
+		strcpy(ar_filename, "control.tar.gz");		
+                if ( (optind + 1) == argc ) {
+                        target_dir = (char *) xmalloc(7);
+                        strcpy(target_dir, "DEBIAN");
+               }
+                else {
+                        target_dir = (char *) xmalloc(strlen(argv[optind+1]));
+
+                        strcpy(target_dir, argv[optind+1]);
+                }
+	}
+/*	else if (optflag & dpkg_deb_info) {
+		extract_flag = TRUE;
+		extract_to_stdout = TRUE;
+		strcpy(ar_filename, "control.tar.gz");
+		extract_list = argv+optind+1;
+		printf("list one is [%s]\n",extract_list[0]);
+	}
+*/
+	else if (optflag & dpkg_deb_extract) {
+		extract_flag = TRUE;
+		strcpy(ar_filename, "data.tar.gz");
+		if ( (optind + 2) > argc ) {
+			error_msg_and_die("No directory specified\n");
+		}
+		target_dir = (char *) xmalloc(strlen(argv[optind+1]));			
+		strcpy(target_dir, argv[optind+1]);
+	}	
+	else if (optflag & dpkg_deb_verbose_extract) {
+		extract_flag = TRUE;
+		list_flag = TRUE;
+		strcpy(ar_filename, "data.tar.gz");
+		if ( (optind + 2) > argc ) {
+			error_msg_and_die("No directory specified\n");
+		}
+		target_dir = (char *) xmalloc(strlen(argv[optind+1]));			
+		strcpy(target_dir, argv[optind+1]);
+	}
+		
+	ar_headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));	
+	srcFd = open(argv[optind], O_RDONLY);
+	
+	*ar_headers = get_headers(srcFd);
+	if (ar_headers->next==NULL)
+		error_msg_and_die("Couldnt find %s in %s\n",ar_filename, argv[optind]);
+
+	while (ar_headers->next != NULL) {
+		if (strcmp(ar_headers->name, ar_filename)==0)
+			break;
+		ar_headers = ar_headers->next;
+	}
+
+	lseek(srcFd, ar_headers->offset, SEEK_SET);
+	srcFd = tar_unzip_init(srcFd);
+	if ( target_dir != NULL) { 
+		if (is_directory(target_dir, TRUE, NULL)==FALSE) {
+			mkdir(target_dir, 0755);
+		}
+		if (chdir(target_dir)==-1) {
+			error_msg_and_die("Cannot change to dir %s\n",argv[optind+1]);
+		}
+	}
+	status = readTarFile(srcFd, extract_flag, list_flag, extract_to_stdout, verbose_flag, NULL, extract_list);
+	return(EXIT_SUCCESS);
+}