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authorDenis Vlasenko <vda.linux@googlemail.com>2007-03-07 22:02:23 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2007-03-07 22:02:23 +0000
commitab9eef21a57c23567505e8fbceb8e5ea76306ce1 (patch)
tree800845b64d0e9a204743656c4d267cc6c9917cde /archival/gunzip.c
parent8e858e2700651a0e973169b579622cd3dcd0defd (diff)
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bunzip2/gunzip/uncompress/unlzma: merge into common code -
fix few corner cases, reduce size by 450 bytes. Update testsuite.
Diffstat (limited to 'archival/gunzip.c')
-rw-r--r--archival/gunzip.c163
1 files changed, 0 insertions, 163 deletions
diff --git a/archival/gunzip.c b/archival/gunzip.c
deleted file mode 100644
index 3d99fe506..000000000
--- a/archival/gunzip.c
+++ /dev/null
@@ -1,163 +0,0 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * Gzip implementation for busybox
4 *
5 * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
6 *
7 * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
8 * based on gzip sources
9 *
10 * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
11 * well as stdin/stdout, and to generally behave itself wrt command line
12 * handling.
13 *
14 * General cleanup to better adhere to the style guide and make use of standard
15 * busybox functions by Glenn McGrath <bug1@iinet.net.au>
16 *
17 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
18 *
19 * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
20 * Copyright (C) 1992-1993 Jean-loup Gailly
21 * The unzip code was written and put in the public domain by Mark Adler.
22 * Portions of the lzw code are derived from the public domain 'compress'
23 * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
24 * Ken Turkowski, Dave Mack and Peter Jannesen.
25 *
26 * See the license_msg below and the file COPYING for the software license.
27 * See the file algorithm.doc for the compression algorithms and file formats.
28 */
29
30#include "busybox.h"
31#include "unarchive.h"
32
33#define GUNZIP_OPT_STDOUT 1
34#define GUNZIP_OPT_FORCE 2
35#define GUNZIP_OPT_TEST 4
36#define GUNZIP_OPT_DECOMPRESS 8
37#define GUNZIP_OPT_VERBOSE 0x10
38
39int gunzip_main(int argc, char **argv);
40int gunzip_main(int argc, char **argv)
41{
42 USE_DESKTOP(long long) int status;
43 int exitcode = 0;
44 unsigned opt;
45
46 opt = getopt32(argc, argv, "cftdv");
47 /* if called as zcat */
48 if (strcmp(applet_name, "zcat") == 0) {
49 opt |= GUNZIP_OPT_STDOUT;
50 }
51
52 do {
53 struct stat stat_buf;
54 char *old_path = argv[optind];
55 char *delete_path = NULL;
56 char *new_path = NULL;
57 int src_fd;
58 int dst_fd;
59
60 optind++;
61
62 if (old_path == NULL || LONE_DASH(old_path)) {
63 src_fd = STDIN_FILENO;
64 opt |= GUNZIP_OPT_STDOUT;
65 USE_DESKTOP(opt &= ~GUNZIP_OPT_VERBOSE;)
66 optind = argc; /* we don't handle "gunzip - a.gz b.gz" */
67 } else {
68 src_fd = xopen(old_path, O_RDONLY);
69 /* Get the time stamp on the input file. */
70 fstat(src_fd, &stat_buf);
71 }
72
73 /* Check that the input is sane. */
74 if (isatty(src_fd) && !(opt & GUNZIP_OPT_FORCE)) {
75 bb_error_msg_and_die
76 ("compressed data not read from terminal, use -f to force it");
77 }
78
79 /* Set output filename and number */
80 if (opt & GUNZIP_OPT_TEST) {
81 dst_fd = xopen(bb_dev_null, O_WRONLY); /* why does test use filenum 2 ? */
82 } else if (opt & GUNZIP_OPT_STDOUT) {
83 dst_fd = STDOUT_FILENO;
84 } else {
85 char *extension;
86
87 new_path = xstrdup(old_path);
88
89 extension = strrchr(new_path, '.');
90#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
91 if (extension && (strcmp(extension, ".Z") == 0)) {
92 *extension = '\0';
93 } else
94#endif
95 if (extension && (strcmp(extension, ".gz") == 0)) {
96 *extension = '\0';
97 } else if (extension && (strcmp(extension, ".tgz") == 0)) {
98 extension[2] = 'a';
99 extension[3] = 'r';
100 } else {
101 // FIXME: should we die or just skip to next?
102 bb_error_msg_and_die("invalid extension");
103 }
104
105 /* Open output file (with correct permissions) */
106 dst_fd = xopen3(new_path, O_WRONLY | O_CREAT | O_TRUNC,
107 stat_buf.st_mode);
108
109 /* If unzip succeeds remove the old file */
110 delete_path = old_path;
111 }
112
113 status = -1;
114 /* do the decompression, and cleanup */
115 if (xread_char(src_fd) == 0x1f) {
116 unsigned char magic2;
117
118 magic2 = xread_char(src_fd);
119 if (ENABLE_FEATURE_GUNZIP_UNCOMPRESS && magic2 == 0x9d) {
120 status = uncompress(src_fd, dst_fd);
121 } else if (magic2 == 0x8b) {
122 check_header_gzip(src_fd); // FIXME: xfunc? _or_die?
123 status = inflate_gunzip(src_fd, dst_fd);
124 } else {
125 bb_error_msg("invalid magic");
126 exitcode = 1;
127 }
128 if (status < 0) {
129 bb_error_msg("error inflating");
130 exitcode = 1;
131 }
132 else if (ENABLE_DESKTOP && (opt & GUNZIP_OPT_VERBOSE)) {
133 fprintf(stderr, "%s: %u%% - replaced with %s\n",
134 old_path, (unsigned)(stat_buf.st_size*100 / (status+1)), new_path);
135 }
136 } else {
137 bb_error_msg("invalid magic");
138 exitcode = 1;
139 }
140 if (status < 0 && new_path) {
141 /* Unzip failed, remove new path instead of old path */
142 delete_path = new_path;
143 }
144
145 if (dst_fd != STDOUT_FILENO) {
146 close(dst_fd);
147 }
148 if (src_fd != STDIN_FILENO) {
149 close(src_fd);
150 }
151
152 /* delete_path will be NULL if in test mode or from stdin */
153 if (delete_path && (unlink(delete_path) == -1)) {
154 bb_error_msg("cannot remove %s", delete_path);
155 exitcode = 1;
156 }
157
158 free(new_path);
159
160 } while (optind < argc);
161
162 return exitcode;
163}
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