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68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/*
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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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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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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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{
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char *filename;
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unsigned long opt;
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int status, src_fd, dst_fd;
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opt = bb_getopt_ulflags(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) && (filename[0] != '-') && (filename[1] != '\0')) {
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/* Open input file */
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src_fd = bb_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) || bb_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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char *extension = filename + strlen(filename) - 5;
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if (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 = bb_xopen3(filename, O_WRONLY | O_CREAT, 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)
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filename[strlen(filename)] = '.';
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if (unlink(filename) < 0) {
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bb_error_msg_and_die("Couldn't remove %s", filename);
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}
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}
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return status;
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}
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/* vi:set ts=4: */
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