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/*
* Modified for busybox by Glenn McGrath <bug1@iinet.net.au>
* Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
*
* 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 <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "busybox.h"
#include "unarchive.h"
#define BUNZIP2_OPT_STDOUT 1
#define BUNZIP2_OPT_FORCE 2
int bunzip2_main(int argc, char **argv)
{
char *compressed_name;
/* Note: Ignore the warning about save_name being used uninitialized.
* That is not the case, but gcc has trouble working that out... */
#warning The save_name warning is OK, ignore it
char *save_name;
unsigned long opt;
int status;
int src_fd;
int dst_fd;
opt = bb_getopt_ulflags(argc, argv, "cf");
/* if called as bzcat force the stdout flag */
if (bb_applet_name[2] == 'c') {
opt |= BUNZIP2_OPT_STDOUT;
}
/* Set input filename and number */
compressed_name = argv[optind];
if ((compressed_name) && (compressed_name[0] != '-') && (compressed_name[1] != '\0')) {
/* Open input file */
src_fd = bb_xopen(compressed_name, O_RDONLY);
} else {
src_fd = STDIN_FILENO;
opt |= BUNZIP2_OPT_STDOUT;
}
/* Check that the input is sane. */
if (isatty(src_fd) && (opt & BUNZIP2_OPT_FORCE) == 0) {
bb_error_msg_and_die("compressed data not read from terminal. Use -f to force it.");
}
if (opt & BUNZIP2_OPT_STDOUT) {
dst_fd = STDOUT_FILENO;
} else {
int len = strlen(compressed_name) - 4;
if (strcmp(compressed_name + len, ".bz2") != 0) {
bb_error_msg_and_die("Invalid extension");
}
save_name = bb_xstrndup(compressed_name, len);
dst_fd = bb_xopen(save_name, O_WRONLY | O_CREAT);
}
status = uncompressStream(src_fd, dst_fd);
if(!(opt & BUNZIP2_OPT_STDOUT)) {
char *delete_name;
if (status) {
delete_name = save_name;
} else {
delete_name = compressed_name;
}
if (unlink(delete_name) < 0) {
bb_error_msg_and_die("Couldn't remove %s", delete_name);
}
}
return status;
}
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