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