New function, deb-extract to be used by dpkg, code cleanups. saves some bytes

1 files changed, 86 insertions, 85 deletions

diff --git a/dpkg_deb.c b/dpkg_deb.c
index 3345c273f..32ef4ca75 100644
--- a/dpkg_deb.c
+++ b/dpkg_deb.c
@@ -14,6 +14,10 @@
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
+/*
+ *	Merge this applet into dpkg when dpkg becomes more stable
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
@@ -33,31 +37,82 @@ typedef struct ar_headers_s {
 	struct ar_headers_s *next;
 } ar_headers_t;
 
-extern ar_headers_t get_headers(int srcFd);
+extern ar_headers_t get_ar_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);
+	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_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;	
+const int dpkg_deb_extract = 8;
+const int dpkg_deb_verbose_extract = 16;
+
+extern int deb_extract(int optflags, const char *dir_name, const char *deb_filename)
+{
+	char **extract_list = NULL;
+	ar_headers_t *ar_headers = NULL;
+	char ar_filename[15];
 	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;
+	int srcFd = 0;
+	int status;
+
+	if (dpkg_deb_contents == (dpkg_deb_contents & optflags)) {
+		strcpy(ar_filename, "data.tar.gz");
+		verbose_flag = TRUE;
+		list_flag = TRUE;
+	}
+	if (dpkg_deb_control == (dpkg_deb_control & optflags)) {
+		strcpy(ar_filename, "control.tar.gz");	
+		extract_flag = TRUE;
+	}
+	if (dpkg_deb_extract == (dpkg_deb_extract & optflags)) {
+		strcpy(ar_filename, "data.tar.gz");
+		extract_flag = TRUE;
+	}
+	if (dpkg_deb_verbose_extract == (dpkg_deb_verbose_extract & optflags)) {
+		strcpy(ar_filename, "data.tar.gz");
+		extract_flag = TRUE;
+		list_flag = TRUE;
+	}
+
+	ar_headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));	
+	srcFd = open(deb_filename, O_RDONLY);
+	
+	*ar_headers = get_ar_headers(srcFd);
+	if (ar_headers->next == NULL) {
+		error_msg_and_die("Couldnt find %s in %s", ar_filename, deb_filename);
+	}
+
+	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 ( dir_name != NULL) { 
+		if (is_directory(dir_name, TRUE, NULL)==FALSE) {
+			mkdir(dir_name, 0755);
+		}
+		if (chdir(dir_name)==-1) {
+			error_msg_and_die("Cannot change to dir %s", dir_name);
+		}
+	}
+	status = readTarFile(srcFd, extract_flag, list_flag, extract_to_stdout, verbose_flag, NULL, extract_list);
+
+	return status;
+}
+
+extern int dpkg_deb_main(int argc, char **argv)
+{
+	char *target_dir = NULL;
+	int opt = 0;
+	int optflag = 0;	
 	
 	while ((opt = getopt(argc, argv, "cexX")) != -1) {
 		switch (opt) {
@@ -67,16 +122,16 @@ extern int dpkg_deb_main(int argc, char **argv)
 			case 'e':
 				optflag |= dpkg_deb_control;
 				break;
-/*			case 'I':
-				optflag |= dpkg_deb_info;
+			case 'X':
+				optflag |= dpkg_deb_verbose_extract;
 				break;
-*/
 			case 'x':
 				optflag |= dpkg_deb_extract;
 				break;
-			case 'X':
-				optflag |= dpkg_deb_verbose_extract;
+/*			case 'I':
+				optflag |= dpkg_deb_info;
 				break;
+*/
 			default:
 				usage(dpkg_deb_usage);
 				return EXIT_FAILURE;
@@ -87,25 +142,16 @@ extern int dpkg_deb_main(int argc, char **argv)
 		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]);
-                }
+	if ((optflag & dpkg_deb_control) || (optflag & dpkg_deb_extract) || (optflag & dpkg_deb_verbose_extract)) {
+		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]);
+		}
 	}
+	deb_extract(optflag, target_dir, argv[optind]);
 /*	else if (optflag & dpkg_deb_info) {
 		extract_flag = TRUE;
 		extract_to_stdout = TRUE;
@@ -114,50 +160,5 @@ extern int dpkg_deb_main(int argc, char **argv)
 		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");
-		}
-		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");
-		}
-		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", 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", argv[optind+1]);
-		}
-	}
-	status = readTarFile(srcFd, extract_flag, list_flag, extract_to_stdout, verbose_flag, NULL, extract_list);
-	close (srcFd);
 	return(EXIT_SUCCESS);
 }