From 1f28b90a9c934a2e56e50da279bfca136b802114 Mon Sep 17 00:00:00 2001
From: Glenn L McGrath <bug1@ihug.co.nz>
Date: Wed, 7 Jan 2004 09:24:06 +0000
Subject: Use bb_getopt_ulflags, save 100 bytes and strict argument checking.

---
 archival/dpkg_deb.c | 93 ++++++++++++++++++++++++++++-------------------------
 1 file changed, 49 insertions(+), 44 deletions(-)

diff --git a/archival/dpkg_deb.c b/archival/dpkg_deb.c
index 2d7383fd7..da94b394f 100644
--- a/archival/dpkg_deb.c
+++ b/archival/dpkg_deb.c
@@ -12,24 +12,32 @@
  *  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 <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <getopt.h>
+
 #include "unarchive.h"
 #include "busybox.h"
 
+#define DPKG_DEB_OPT_CONTENTS	1
+#define DPKG_DEB_OPT_CONTROL	2
+#define DPKG_DEB_OPT_FIELD	4
+#define DPKG_DEB_OPT_EXTRACT	8
+#define DPKG_DEB_OPT_EXTRACT_VERBOSE	16
+
 extern int dpkg_deb_main(int argc, char **argv)
 {
 	archive_handle_t *ar_archive;
 	archive_handle_t *tar_archive;
-	int opt = 0;
-#ifndef CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
 	llist_t *control_tar_llist = NULL;
-#endif
-	
+	unsigned long opt;
+	char *extract_dir = NULL;
+	short argcount = 1;
+
 	/* Setup the tar archive handle */
 	tar_archive = init_handle();
 
@@ -40,53 +48,47 @@ extern int dpkg_deb_main(int argc, char **argv)
 
 #ifdef CONFIG_FEATURE_DEB_TAR_GZ
 	ar_archive->accept = llist_add_to(NULL, "data.tar.gz");
-# ifndef CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
 	control_tar_llist = llist_add_to(NULL, "control.tar.gz");
-# endif
 #endif
 
 #ifdef CONFIG_FEATURE_DEB_TAR_BZ2
 	ar_archive->accept = llist_add_to(ar_archive->accept, "data.tar.bz2");
-# ifndef CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
 	control_tar_llist = llist_add_to(control_tar_llist, "control.tar.bz2");
-# endif
 #endif
 
-#ifndef CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
-	while ((opt = getopt(argc, argv, "cefXx")) != -1) {
-#else
-	while ((opt = getopt(argc, argv, "x")) != -1) {
-#endif
-		switch (opt) {
-#ifndef CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY
-			case 'c':
-				tar_archive->action_header = header_verbose_list;
-				break;
-			case 'e':
-				ar_archive->accept = control_tar_llist;
-				tar_archive->action_data = data_extract_all;
-				break;
-			case 'f':
-				/* Print the entire control file
-				 * it should accept a second argument which specifies a 
-				 * specific field to print */
-				ar_archive->accept = control_tar_llist;
-				tar_archive->accept = llist_add_to(NULL, "./control");;
-				tar_archive->filter = filter_accept_list;
-				tar_archive->action_data = data_extract_to_stdout;
-				break;
-			case 'X':
-				tar_archive->action_header = header_list;
-#endif
-			case 'x':
-				tar_archive->action_data = data_extract_all;
-				break;
-			default:
-				bb_show_usage();
+	bb_opt_complementaly = "c~efXx:e~cfXx:f~ceXx:X~cefx:x~cefX";
+	opt = bb_getopt_ulflags(argc, argv, "cefXx");
+
+	if (opt & DPKG_DEB_OPT_CONTENTS) {
+		tar_archive->action_header = header_verbose_list;
+	}
+	if (opt & DPKG_DEB_OPT_CONTROL) {
+		ar_archive->accept = control_tar_llist;
+		tar_archive->action_data = data_extract_all;
+		if (optind + 1 == argc) {
+			extract_dir = "./DEBIAN";
+		} else {
+			argcount++;
 		}
 	}
+	if (opt & DPKG_DEB_OPT_FIELD) {
+		/* Print the entire control file
+		 * it should accept a second argument which specifies a 
+		 * specific field to print */
+		ar_archive->accept = control_tar_llist;
+		tar_archive->accept = llist_add_to(NULL, "./control");;
+		tar_archive->filter = filter_accept_list;
+		tar_archive->action_data = data_extract_to_stdout;
+	}
+	if (opt & DPKG_DEB_OPT_EXTRACT) {
+		tar_archive->action_header = header_list;
+	}
+	if (opt & (DPKG_DEB_OPT_EXTRACT_VERBOSE | DPKG_DEB_OPT_EXTRACT)) {
+		tar_archive->action_data = data_extract_all;
+		argcount = 2;
+	}
 
-	if (optind + 2 < argc)  {
+	if ((optind + argcount != argc) || (opt & 0x80000000UL)) {
 		bb_show_usage();
 	}
 
@@ -94,9 +96,13 @@ extern int dpkg_deb_main(int argc, char **argv)
 
 	/* Workout where to extract the files */
 	/* 2nd argument is a dir name */
-	mkdir(argv[optind], 0777);
-	chdir(argv[optind]);
-
+	if (argv[optind]) {
+		extract_dir = argv[optind];
+	}
+	if (extract_dir) {
+		mkdir(extract_dir, 0777);
+		chdir(extract_dir);
+	}
 	unpack_ar_archive(ar_archive);
 
 	/* Cleanup */
@@ -104,4 +110,3 @@ extern int dpkg_deb_main(int argc, char **argv)
 
 	return(EXIT_SUCCESS);
 }
-
-- 
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