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/* 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;
}
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