--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * Uncompress applet for busybox (c) 2002 Glenn McGrath
+ *
+ * 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 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 <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "libbb.h"
+#include "unarchive.h"
+
+int uncompress_main(int argc, char **argv)
+{
+ const char gunzip_to_stdout = 1;
+ const char gunzip_force = 2;
+ char status = EXIT_SUCCESS;
+ char flags = 0;
+ int opt;
+
+ while ((opt = getopt(argc, argv, "cfh")) != -1) {
+ switch (opt) {
+ case 'c':
+ flags |= gunzip_to_stdout;
+ break;
+ case 'f':
+ flags |= gunzip_force;
+ break;
+ default:
+ show_usage(); /* exit's inside usage */
+ }
+ }
+
+ do {
+ struct stat stat_buf;
+ const char *old_path = argv[optind];
+ const char *delete_path = NULL;
+ char *new_path = NULL;
+ int src_fd;
+ int dst_fd;
+
+ optind++;
+
+ if (old_path == NULL || strcmp(old_path, "-") == 0) {
+ src_fd = fileno(stdin);
+ flags |= gunzip_to_stdout;
+ } else {
+ src_fd = xopen(old_path, O_RDONLY);
+
+ /* Get the time stamp on the input file. */
+ if (stat(old_path, &stat_buf) < 0) {
+ error_msg_and_die("Couldn't stat file %s", old_path);
+ }
+ }
+
+ /* Check that the input is sane. */
+ if (isatty(src_fd) && ((flags & gunzip_force) == 0)) {
+ error_msg_and_die
+ ("compressed data not read from terminal. Use -f to force it.");
+ }
+
+ /* Set output filename and number */
+ if (flags & gunzip_to_stdout) {
+ dst_fd = fileno(stdout);
+ } else {
+ char *extension;
+
+ new_path = xstrdup(old_path);
+
+ extension = strrchr(new_path, '.');
+ if (!extension || (strcmp(extension, ".Z") != 0)) {
+ error_msg_and_die("Invalid extension");
+ }
+ *extension = '\0';
+
+ /* Open output file */
+ dst_fd = xopen(new_path, O_WRONLY | O_CREAT);
+
+ /* Set permissions on the file */
+ chmod(new_path, stat_buf.st_mode);
+
+ /* If unzip succeeds remove the old file */
+ delete_path = old_path;
+ }
+
+ /* do the decompression, and cleanup */
+ if ((xread_char(src_fd) == 0x1f) && (xread_char(src_fd) == 0x9d)) {
+ status = uncompress(src_fd, dst_fd);
+ } else {
+ error_msg_and_die("Invalid magic");
+ }
+
+ if ((status != EXIT_SUCCESS) && (new_path)) {
+ /* Unzip failed, remove new path instead of old path */
+ delete_path = new_path;
+ }
+
+ if (dst_fd != fileno(stdout)) {
+ close(dst_fd);
+ }
+ if (src_fd != fileno(stdin)) {
+ close(src_fd);
+ }
+
+ /* delete_path will be NULL if in test mode or from stdin */
+ if (delete_path && (unlink(delete_path) == -1)) {
+ error_msg_and_die("Couldn't remove %s", delete_path);
+ }
+
+ free(new_path);
+
+ } while (optind < argc);
+
+ return status;
+}
projects / oweals / busybox.git / commitdiff