1 |
root |
1.1 |
/* |
2 |
root |
1.10 |
* Copyright (c) 2006 Stefan Traby <stefan@hello-penguin.com> |
3 |
root |
1.1 |
* |
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* Redistribution and use in source and binary forms, with or without modifica- |
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* tion, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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pcg |
1.4 |
* |
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* Alternatively, the contents of this file may be used under the terms of |
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* the GNU General Public License version 2 (the "GPL"), in which case the |
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* provisions of the GPL are applicable instead of the above. If you wish to |
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* allow the use of your version of this file only under the terms of the |
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* GPL and not to allow others to use your version of this file under the |
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* BSD license, indicate your decision by deleting the provisions above and |
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* replace them with the notice and other provisions required by the GPL. If |
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* you do not delete the provisions above, a recipient may use your version |
33 |
root |
1.10 |
* of this file under either the BSD or the GPL License. |
34 |
root |
1.1 |
*/ |
35 |
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36 |
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#include "config.h" |
37 |
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#include <stdio.h> |
38 |
root |
1.10 |
#include <string.h> |
39 |
root |
1.1 |
#include <stdlib.h> |
40 |
root |
1.10 |
#include <unistd.h> |
41 |
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#include <sys/types.h> |
42 |
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#include <sys/stat.h> |
43 |
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#include <fcntl.h> |
44 |
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#include <errno.h> |
45 |
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#include <limits.h> |
46 |
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#include "lzf.h" |
47 |
root |
1.1 |
|
48 |
root |
1.10 |
#ifdef HAVE_GETOPT_H |
49 |
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# include <getopt.h> |
50 |
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#endif |
51 |
root |
1.1 |
|
52 |
root |
1.10 |
#define BLOCKSIZE (1024 * 64 - 1) |
53 |
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#define MAX_BLOCKSIZE BLOCKSIZE |
54 |
root |
1.1 |
|
55 |
pcg |
1.3 |
typedef unsigned char u8; |
56 |
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|
57 |
root |
1.10 |
static off_t nr_read, nr_written; |
58 |
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59 |
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static const char *imagename; |
60 |
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static enum { compress, uncompress, lzcat } mode = compress; |
61 |
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static int verbose = 0; |
62 |
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static int force = 0; |
63 |
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static long blocksize = BLOCKSIZE; |
64 |
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|
65 |
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#ifdef HAVE_GETOPT_LONG |
66 |
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|
67 |
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struct option longopts[] = { |
68 |
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{"compress", 0, 0, 'c'}, |
69 |
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{"decompress", 0, 0, 'd'}, |
70 |
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{"uncompress", 0, 0, 'd'}, |
71 |
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{"force", 0, 0, 'f'}, |
72 |
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{"help", 0, 0, 'h'}, |
73 |
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{"verbose", 0, 0, 'v'}, |
74 |
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{"blocksize", 1, 0, 'b'}, |
75 |
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{0, 0, 0, 0} |
76 |
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}; |
77 |
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|
78 |
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static const char *opt = |
79 |
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"-c --compress compress\n" |
80 |
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"-d --decompress decompress\n" |
81 |
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"-f --force force overwrite of output file\n" |
82 |
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"-h --help give this help\n" "-v --verbose verbose mode\n" "-b # --blocksize # set blocksize\n" "\n"; |
83 |
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84 |
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#else |
85 |
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|
86 |
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static const char *opt = |
87 |
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"-c compress\n" |
88 |
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"-d decompress\n" |
89 |
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"-f force overwrite of output file\n" |
90 |
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"-h give this help\n" |
91 |
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"-v verbose mode\n" |
92 |
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"-b # set blocksize\n" |
93 |
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"\n"; |
94 |
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95 |
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#endif |
96 |
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|
97 |
root |
1.1 |
static void |
98 |
root |
1.10 |
usage (int rc) |
99 |
root |
1.1 |
{ |
100 |
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fprintf (stderr, "\n" |
101 |
root |
1.10 |
"lzf, a very lightweight compression/decompression utility written by Stefan Traby.\n" |
102 |
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"uses liblzf written by Marc Lehmann <schmorp@schmorp.de> You can find more info at\n" |
103 |
pcg |
1.3 |
"http://liblzf.plan9.de/\n" |
104 |
root |
1.1 |
"\n" |
105 |
root |
1.10 |
"usage: lzf [-dufhvb] [file ...]\n" |
106 |
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" unlzf [file ...]\n" |
107 |
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" lzcat [file ...]\n" |
108 |
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"\n%s", |
109 |
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opt); |
110 |
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111 |
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exit (rc); |
112 |
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} |
113 |
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|
114 |
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static inline ssize_t |
115 |
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rread (int fd, void *buf, size_t len) |
116 |
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{ |
117 |
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ssize_t rc = 0, offset = 0; |
118 |
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char *p = buf; |
119 |
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120 |
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while (len && (rc = read (fd, &p[offset], len)) > 0) |
121 |
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{ |
122 |
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offset += rc; |
123 |
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len -= rc; |
124 |
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} |
125 |
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126 |
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nr_read += offset; |
127 |
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|
128 |
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if (rc < 0) |
129 |
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return rc; |
130 |
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131 |
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return offset; |
132 |
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} |
133 |
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|
134 |
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/* returns 0 if all written else -1 */ |
135 |
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static inline ssize_t |
136 |
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wwrite (int fd, void *buf, size_t len) |
137 |
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{ |
138 |
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ssize_t rc; |
139 |
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char *b = buf; |
140 |
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size_t l = len; |
141 |
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|
142 |
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while (l) |
143 |
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{ |
144 |
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rc = write (fd, b, l); |
145 |
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if (rc < 0) |
146 |
|
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{ |
147 |
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fprintf (stderr, "%s: write error: ", imagename); |
148 |
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perror (""); |
149 |
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return -1; |
150 |
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} |
151 |
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152 |
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l -= rc; |
153 |
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b += rc; |
154 |
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} |
155 |
root |
1.1 |
|
156 |
root |
1.10 |
nr_written += len; |
157 |
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return 0; |
158 |
root |
1.1 |
} |
159 |
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|
160 |
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/* |
161 |
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* Anatomy: an lzf file consists of any number of blocks in the following format: |
162 |
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* |
163 |
root |
1.8 |
* \x00 EOF (optional) |
164 |
root |
1.1 |
* "ZV\0" 2-byte-usize <uncompressed data> |
165 |
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* "ZV\1" 2-byte-csize 2-byte-usize <compressed data> |
166 |
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* "ZV\2" 4-byte-crc32-0xdebb20e3 (NYI) |
167 |
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*/ |
168 |
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169 |
root |
1.10 |
|
170 |
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#define TYPE0_HDR_SIZE 5 |
171 |
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#define TYPE1_HDR_SIZE 7 |
172 |
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#define MAX_HDR_SIZE 7 |
173 |
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#define MIN_HDR_SIZE 5 |
174 |
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175 |
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static int |
176 |
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compress_fd (int from, int to) |
177 |
root |
1.1 |
{ |
178 |
root |
1.10 |
ssize_t us, cs, len; |
179 |
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u8 buf1[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
180 |
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u8 buf2[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
181 |
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u8 *header; |
182 |
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183 |
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nr_read = nr_written = 0; |
184 |
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while ((us = rread (from, &buf1[MAX_HDR_SIZE], blocksize)) > 0) |
185 |
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{ |
186 |
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cs = lzf_compress (&buf1[MAX_HDR_SIZE], us, &buf2[MAX_HDR_SIZE], us > 4 ? us - 4 : us); |
187 |
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if (cs) |
188 |
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{ |
189 |
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header = &buf2[MAX_HDR_SIZE - TYPE1_HDR_SIZE]; |
190 |
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header[0] = 'Z'; |
191 |
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header[1] = 'V'; |
192 |
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header[2] = 1; |
193 |
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header[3] = cs >> 8; |
194 |
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header[4] = cs & 0xff; |
195 |
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header[5] = us >> 8; |
196 |
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header[6] = us & 0xff; |
197 |
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len = cs + TYPE1_HDR_SIZE; |
198 |
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} |
199 |
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else |
200 |
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{ // write uncompressed |
201 |
|
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header = &buf1[MAX_HDR_SIZE - TYPE0_HDR_SIZE]; |
202 |
|
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header[0] = 'Z'; |
203 |
|
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header[1] = 'V'; |
204 |
|
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header[2] = 0; |
205 |
|
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header[3] = us >> 8; |
206 |
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header[4] = us & 0xff; |
207 |
|
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len = us + TYPE0_HDR_SIZE; |
208 |
|
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} |
209 |
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|
210 |
|
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if (wwrite (to, header, len) == -1) |
211 |
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return -1; |
212 |
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} |
213 |
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|
214 |
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return 0; |
215 |
root |
1.1 |
} |
216 |
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|
217 |
root |
1.10 |
static int |
218 |
|
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uncompress_fd (int from, int to) |
219 |
root |
1.1 |
{ |
220 |
root |
1.10 |
u8 header[MAX_HDR_SIZE]; |
221 |
|
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u8 buf1[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
222 |
|
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u8 buf2[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
223 |
|
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u8 *p; |
224 |
|
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int l, rd; |
225 |
|
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ssize_t rc, cs, us, bytes, over = 0; |
226 |
|
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|
227 |
|
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nr_read = nr_written = 0; |
228 |
|
|
while (1) |
229 |
|
|
{ |
230 |
|
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rc = rread (from, header + over, MAX_HDR_SIZE - over); |
231 |
|
|
if (rc < 0) |
232 |
|
|
{ |
233 |
|
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fprintf (stderr, "%s: read error: ", imagename); |
234 |
|
|
perror (""); |
235 |
|
|
return -1; |
236 |
|
|
} |
237 |
|
|
|
238 |
|
|
rc += over; |
239 |
|
|
over = 0; |
240 |
|
|
if (!rc || header[0] == 0) |
241 |
|
|
return 0; |
242 |
|
|
|
243 |
|
|
if (rc < MIN_HDR_SIZE || header[0] != 'Z' || header[1] != 'V') |
244 |
|
|
{ |
245 |
|
|
fprintf (stderr, "%s: invalid data stream - magic not found or short header\n", imagename); |
246 |
|
|
return -1; |
247 |
|
|
} |
248 |
|
|
|
249 |
|
|
switch (header[2]) |
250 |
|
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{ |
251 |
|
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case 0: |
252 |
|
|
cs = -1; |
253 |
|
|
us = (header[3] << 8) | header[4]; |
254 |
|
|
p = &header[TYPE0_HDR_SIZE]; |
255 |
|
|
break; |
256 |
|
|
case 1: |
257 |
|
|
if (rc < TYPE1_HDR_SIZE) |
258 |
|
|
{ |
259 |
|
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goto short_read; |
260 |
|
|
} |
261 |
|
|
cs = (header[3] << 8) | header[4]; |
262 |
|
|
us = (header[5] << 8) | header[6]; |
263 |
|
|
p = &header[TYPE1_HDR_SIZE]; |
264 |
|
|
break; |
265 |
|
|
default: |
266 |
|
|
fprintf (stderr, "%s: unknown blocktype\n", imagename); |
267 |
|
|
return -1; |
268 |
|
|
} |
269 |
|
|
|
270 |
|
|
bytes = cs == -1 ? us : cs; |
271 |
|
|
l = &header[rc] - p; |
272 |
|
|
|
273 |
|
|
if (l > 0) |
274 |
|
|
memcpy (buf1, p, l); |
275 |
|
|
|
276 |
|
|
if (l > bytes) |
277 |
|
|
{ |
278 |
|
|
over = l - bytes; |
279 |
|
|
memmove (header, &p[bytes], over); |
280 |
|
|
} |
281 |
|
|
|
282 |
|
|
p = &buf1[l]; |
283 |
|
|
rd = bytes - l; |
284 |
|
|
if (rd > 0) |
285 |
|
|
if ((rc = rread (from, p, rd)) != rd) |
286 |
|
|
goto short_read; |
287 |
|
|
|
288 |
|
|
if (cs == -1) |
289 |
|
|
{ |
290 |
|
|
if (wwrite (to, buf1, us)) |
291 |
|
|
return -1; |
292 |
|
|
} |
293 |
|
|
else |
294 |
|
|
{ |
295 |
|
|
if (lzf_decompress (buf1, cs, buf2, us) != us) |
296 |
|
|
{ |
297 |
|
|
fprintf (stderr, "%s: decompress: invalid stream - data corrupted\n", imagename); |
298 |
|
|
return -1; |
299 |
|
|
} |
300 |
|
|
|
301 |
|
|
if (wwrite (to, buf2, us)) |
302 |
|
|
return -1; |
303 |
|
|
} |
304 |
|
|
} |
305 |
|
|
|
306 |
|
|
return 0; |
307 |
|
|
|
308 |
|
|
short_read: |
309 |
|
|
fprintf (stderr, "%s: short data\n", imagename); |
310 |
|
|
return -1; |
311 |
|
|
} |
312 |
|
|
|
313 |
|
|
static int |
314 |
|
|
open_out (const char *name) |
315 |
|
|
{ |
316 |
|
|
int fd; |
317 |
|
|
int m = O_EXCL; |
318 |
|
|
|
319 |
|
|
if (force) |
320 |
|
|
m = 0; |
321 |
|
|
|
322 |
|
|
fd = open (name, O_CREAT | O_WRONLY | O_TRUNC | m, 600); |
323 |
root |
1.11 |
#if defined(__MINGW32__) |
324 |
|
|
_setmode(fd, _O_BINARY); |
325 |
|
|
#endif |
326 |
root |
1.10 |
return fd; |
327 |
|
|
} |
328 |
|
|
|
329 |
|
|
static int |
330 |
|
|
compose_name (const char *fname, char *oname) |
331 |
|
|
{ |
332 |
|
|
char *p; |
333 |
|
|
|
334 |
|
|
if (mode == compress) |
335 |
|
|
{ |
336 |
|
|
if (strlen (fname) > PATH_MAX - 4) |
337 |
|
|
{ |
338 |
|
|
fprintf (stderr, "%s: %s.lzf: name too long", imagename, fname); |
339 |
|
|
return -1; |
340 |
|
|
} |
341 |
|
|
|
342 |
|
|
strcpy (oname, fname); |
343 |
|
|
strcat (oname, ".lzf"); |
344 |
|
|
} |
345 |
|
|
else |
346 |
|
|
{ |
347 |
|
|
if (strlen (fname) > PATH_MAX) |
348 |
|
|
{ |
349 |
|
|
fprintf (stderr, "%s: %s: name too long\n", imagename, fname); |
350 |
|
|
return -1; |
351 |
|
|
} |
352 |
|
|
|
353 |
|
|
strcpy (oname, fname); |
354 |
|
|
p = &oname[strlen (oname)] - 4; |
355 |
|
|
if (p < oname || strcmp (p, ".lzf")) |
356 |
|
|
{ |
357 |
|
|
fprintf (stderr, "%s: %s: unknown suffix\n", imagename, fname); |
358 |
|
|
return -1; |
359 |
|
|
} |
360 |
|
|
|
361 |
|
|
*p = 0; |
362 |
|
|
} |
363 |
|
|
|
364 |
|
|
return 0; |
365 |
|
|
} |
366 |
|
|
|
367 |
|
|
static int |
368 |
|
|
run_file (const char *fname) |
369 |
|
|
{ |
370 |
|
|
int fd, fd2; |
371 |
|
|
int rc; |
372 |
|
|
struct stat mystat; |
373 |
|
|
char oname[PATH_MAX + 1]; |
374 |
|
|
|
375 |
|
|
if (mode != lzcat) |
376 |
|
|
if (compose_name (fname, oname)) |
377 |
|
|
return -1; |
378 |
|
|
|
379 |
root |
1.11 |
#if !defined(__MINGW32__) |
380 |
root |
1.10 |
rc = lstat (fname, &mystat); |
381 |
root |
1.11 |
#else |
382 |
|
|
rc = stat (fname, &mystat); |
383 |
|
|
#endif |
384 |
root |
1.10 |
fd = open (fname, O_RDONLY); |
385 |
root |
1.11 |
#if defined(__MINGW32__) |
386 |
|
|
_setmode(fd, _O_BINARY); |
387 |
|
|
#endif |
388 |
root |
1.10 |
if (rc || fd == -1) |
389 |
|
|
{ |
390 |
|
|
fprintf (stderr, "%s: %s: ", imagename, fname); |
391 |
|
|
perror (""); |
392 |
|
|
return -1; |
393 |
|
|
} |
394 |
|
|
|
395 |
|
|
if (!S_ISREG (mystat.st_mode)) |
396 |
|
|
{ |
397 |
|
|
fprintf (stderr, "%s: %s: not a regular file.\n", imagename, fname); |
398 |
|
|
close (fd); |
399 |
|
|
return -1; |
400 |
|
|
} |
401 |
|
|
|
402 |
|
|
if (mode == lzcat) |
403 |
|
|
{ |
404 |
|
|
rc = uncompress_fd (fd, 1); |
405 |
|
|
close (fd); |
406 |
|
|
return rc; |
407 |
|
|
} |
408 |
|
|
|
409 |
|
|
fd2 = open_out (oname); |
410 |
|
|
if (fd2 == -1) |
411 |
|
|
{ |
412 |
|
|
fprintf (stderr, "%s: %s: ", imagename, oname); |
413 |
|
|
perror (""); |
414 |
|
|
close (fd); |
415 |
|
|
return -1; |
416 |
|
|
} |
417 |
|
|
|
418 |
|
|
if (mode == compress) |
419 |
|
|
{ |
420 |
|
|
rc = compress_fd (fd, fd2); |
421 |
|
|
if (!rc && verbose) |
422 |
|
|
fprintf (stderr, "%s: %5.1f%% -- replaced with %s\n", |
423 |
|
|
fname, nr_read == 0 ? 0 : 100.0 - nr_written / ((double) nr_read / 100.0), oname); |
424 |
|
|
} |
425 |
|
|
else |
426 |
|
|
{ |
427 |
|
|
rc = uncompress_fd (fd, fd2); |
428 |
|
|
if (!rc && verbose) |
429 |
|
|
fprintf (stderr, "%s: %5.1f%% -- replaced with %s\n", |
430 |
|
|
fname, nr_written == 0 ? 0 : 100.0 - nr_read / ((double) nr_written / 100.0), oname); |
431 |
|
|
} |
432 |
|
|
|
433 |
root |
1.11 |
#if !defined(__MINGW32__) |
434 |
root |
1.10 |
fchmod (fd2, mystat.st_mode); |
435 |
root |
1.11 |
#else |
436 |
|
|
chmod (oname, mystat.st_mode); |
437 |
|
|
#endif |
438 |
root |
1.10 |
close (fd); |
439 |
|
|
close (fd2); |
440 |
|
|
|
441 |
|
|
if (!rc) |
442 |
|
|
unlink (fname); |
443 |
|
|
|
444 |
|
|
return rc; |
445 |
root |
1.1 |
} |
446 |
|
|
|
447 |
|
|
int |
448 |
|
|
main (int argc, char *argv[]) |
449 |
|
|
{ |
450 |
root |
1.10 |
char *p = argv[0]; |
451 |
|
|
int optc; |
452 |
|
|
int rc = 0; |
453 |
|
|
|
454 |
|
|
errno = 0; |
455 |
|
|
p = getenv ("LZF_BLOCKSIZE"); |
456 |
|
|
if (p) |
457 |
|
|
{ |
458 |
|
|
blocksize = strtoul (p, 0, 0); |
459 |
|
|
if (errno || !blocksize || blocksize > MAX_BLOCKSIZE) |
460 |
|
|
blocksize = BLOCKSIZE; |
461 |
|
|
} |
462 |
|
|
|
463 |
|
|
p = strrchr (argv[0], '/'); |
464 |
|
|
imagename = p ? ++p : argv[0]; |
465 |
|
|
|
466 |
|
|
if (!strncmp (imagename, "un", 2) || !strncmp (imagename, "de", 2)) |
467 |
|
|
mode = uncompress; |
468 |
|
|
|
469 |
|
|
if (strstr (imagename, "cat")) |
470 |
|
|
mode = lzcat; |
471 |
|
|
|
472 |
|
|
#ifdef HAVE_GETOPT_LONG |
473 |
|
|
while ((optc = getopt_long (argc, argv, "cdfhvb:", longopts, 0)) != -1) |
474 |
|
|
#else |
475 |
|
|
while ((optc = getopt (argc, argv, "cdfhvb:")) != -1) |
476 |
|
|
#endif |
477 |
|
|
{ |
478 |
|
|
switch (optc) |
479 |
|
|
{ |
480 |
|
|
case 'c': |
481 |
|
|
mode = compress; |
482 |
|
|
break; |
483 |
|
|
case 'd': |
484 |
|
|
mode = uncompress; |
485 |
|
|
break; |
486 |
|
|
case 'f': |
487 |
|
|
force = 1; |
488 |
|
|
break; |
489 |
|
|
case 'h': |
490 |
|
|
usage (0); |
491 |
|
|
break; |
492 |
|
|
case 'v': |
493 |
|
|
verbose = 1; |
494 |
|
|
break; |
495 |
|
|
case 'b': |
496 |
|
|
errno = 0; |
497 |
|
|
blocksize = strtoul (optarg, 0, 0); |
498 |
|
|
if (errno || !blocksize || blocksize > MAX_BLOCKSIZE) |
499 |
|
|
blocksize = BLOCKSIZE; |
500 |
|
|
break; |
501 |
|
|
default: |
502 |
|
|
usage (1); |
503 |
|
|
break; |
504 |
|
|
} |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
if (optind == argc) |
508 |
|
|
{ // stdin stdout |
509 |
|
|
if (!force) |
510 |
|
|
{ |
511 |
|
|
if ((mode == uncompress || mode == lzcat) && isatty (0)) |
512 |
|
|
{ |
513 |
|
|
fprintf (stderr, "%s: compressed data not read from a terminal. Use -f to force decompression.\n", imagename); |
514 |
|
|
exit (1); |
515 |
|
|
} |
516 |
|
|
if (mode == compress && isatty (1)) |
517 |
|
|
{ |
518 |
|
|
fprintf (stderr, "%s: compressed data not written to a terminal. Use -f to force compression.\n", imagename); |
519 |
|
|
exit (1); |
520 |
|
|
} |
521 |
|
|
} |
522 |
|
|
|
523 |
|
|
if (mode == compress) |
524 |
|
|
rc = compress_fd (0, 1); |
525 |
|
|
else |
526 |
|
|
rc = uncompress_fd (0, 1); |
527 |
|
|
|
528 |
|
|
exit (rc ? 1 : 0); |
529 |
|
|
} |
530 |
|
|
|
531 |
|
|
while (optind < argc) |
532 |
|
|
rc |= run_file (argv[optind++]); |
533 |
root |
1.1 |
|
534 |
root |
1.10 |
exit (rc ? 1 : 0); |
535 |
root |
1.1 |
} |
536 |
root |
1.10 |
|