| 1 | /*
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| 2 | * Small lzma deflate implementation.
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| 3 | * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
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| 4 | *
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| 5 | * Based on bunzip.c from busybox
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| 6 | *
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| 7 | * Licensed under GPL v2, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | #include <fcntl.h>
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| 11 | #include <stdio.h>
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| 12 | #include <stdlib.h>
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| 13 | #include <string.h>
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| 14 | #include <unistd.h>
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| 15 |
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| 16 | #include "busybox.h"
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| 17 | #include "unarchive.h"
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| 18 |
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| 19 | #define UNLZMA_OPT_STDOUT 1
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| 20 |
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| 21 | int unlzma_main(int argc, char **argv)
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| 22 | {
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| 23 | char *filename;
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| 24 | unsigned long opt;
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| 25 | int status, src_fd, dst_fd;
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| 26 |
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| 27 | opt = bb_getopt_ulflags(argc, argv, "c");
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| 28 |
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| 29 | /* Set input filename and number */
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| 30 | filename = argv[optind];
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| 31 | if ((filename) && (filename[0] != '-') && (filename[1] != '\0')) {
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| 32 | /* Open input file */
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| 33 | src_fd = bb_xopen(filename, O_RDONLY);
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| 34 | } else {
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| 35 | src_fd = STDIN_FILENO;
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| 36 | filename = 0;
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| 37 | }
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| 38 |
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| 39 | /* if called as lzmacat force the stdout flag */
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| 40 | if ((opt & UNLZMA_OPT_STDOUT) || bb_applet_name[4] == 'c')
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| 41 | filename = 0;
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| 42 |
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| 43 | if (filename) {
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| 44 | struct stat stat_buf;
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| 45 | char *extension = filename + strlen(filename) - 5;
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| 46 |
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| 47 | if (strcmp(extension, ".lzma") != 0) {
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| 48 | bb_error_msg_and_die("Invalid extension");
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| 49 | }
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| 50 | xstat(filename, &stat_buf);
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| 51 | *extension = 0;
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| 52 | dst_fd = bb_xopen3(filename, O_WRONLY | O_CREAT, stat_buf.st_mode);
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| 53 | } else
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| 54 | dst_fd = STDOUT_FILENO;
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| 55 | status = unlzma(src_fd, dst_fd);
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| 56 | if (filename) {
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| 57 | if (!status)
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| 58 | filename[strlen(filename)] = '.';
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| 59 | if (unlink(filename) < 0) {
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| 60 | bb_error_msg_and_die("Couldn't remove %s", filename);
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | return status;
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| 65 | }
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| 66 |
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| 67 | /* vi:set ts=4: */
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