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/* vi: set sw=4 ts=4: */
/*
* Small lzma deflate implementation.
* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
* Based on bunzip.c from busybox
*
* Licensed under GPL v2, see file LICENSE in this tarball for details.
*/
/* Why our g[un]zip/bunzip2 are so ugly compared to this beauty? */
#include "busybox.h"
#include "unarchive.h"
#define UNLZMA_OPT_STDOUT 1
int unlzma_main(int argc, char **argv)
{
USE_DESKTOP(long long) int status;
char *filename;
unsigned opt;
int src_fd, dst_fd;
opt = getopt32(argc, argv, "c");
/* Set input filename and number */
filename = argv[optind];
if (filename && NOT_LONE_DASH(filename)) {
/* Open input file */
src_fd = xopen(filename, O_RDONLY);
} else {
src_fd = STDIN_FILENO;
filename = 0;
}
/* if called as lzmacat force the stdout flag */
if ((opt & UNLZMA_OPT_STDOUT) || applet_name[4] == 'c')
filename = 0;
if (filename) {
struct stat stat_buf;
/* bug: char *extension = filename + strlen(filename) - 5; */
char *extension = strrchr(filename, '.');
if (!extension || strcmp(extension, ".lzma") != 0) {
bb_error_msg_and_die("invalid extension");
}
xstat(filename, &stat_buf);
*extension = '\0';
dst_fd = xopen3(filename, O_WRONLY | O_CREAT | O_TRUNC,
stat_buf.st_mode);
} else
dst_fd = STDOUT_FILENO;
status = unlzma(src_fd, dst_fd);
if (filename) {
if (status >= 0) /* if success delete src, else delete dst */
filename[strlen(filename)] = '.';
if (unlink(filename) < 0) {
bb_error_msg_and_die("cannot remove %s", filename);
}
}
return (status < 0);
}
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