Make uncompress a seperate applet so it doesnt pull in all the gunzip code

1 files changed, 133 insertions, 0 deletions

diff --git a/archival/uncompress.c b/archival/uncompress.c
new file mode 100644
index 000000000..877bcc784
--- /dev/null
+++ b/archival/uncompress.c
@@ -0,0 +1,133 @@
+/* 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;
+}