1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* compression.c: code to find decompressor / compression extension
*
* Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
* Copyright (C) 2001-2022 Colin Watson.
*
* This file is part of man-db.
*
* man-db is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* man-db is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with man-db; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Sat Aug 20 15:01:02 BST 1994 Wilf. (G.Wilford@ee.surrey.ac.uk)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "error.h"
#include "xstrndup.h"
#include "xvasprintf.h"
#include "manconfig.h"
#include "appendstr.h"
#include "compression.h"
/*--------------------------------------------------------------------------*/
/* This is where we define the decompressors used to decompress any nroff */
/* source that we find. All cat pages are compressed with either gzip (if */
/* available) or compress. This is not the place to define _the_ cat page */
/* decompressor - see ./manconfig.h for that. */
/* */
/* To add a decompressor all you need to know is its name (preferrably its */
/* location), and the unique extension that it gives to files compressed */
/* with it. Here is an example. You have a compressor named foobar and */
/* compressed files have an extension of .fb . It is located in /usr/bin */
/* and requires a -d option to be used as a decompressor. Add the following */
/* line to the structure below. */
/* */
/* {"/usr/bin/foobar -d", "fb", NULL}, */
/*--------------------------------------------------------------------------*/
struct compression comp_list[] = {
/* If we have gzip, incorporate the following */
#ifdef HAVE_GZIP
{PROG_GUNZIP, "gz", NULL},
{PROG_GUNZIP, "z", NULL},
#endif /* HAVE_GZIP */
/* If we have compress, incorporate the following */
#ifdef HAVE_COMPRESS
{PROG_UNCOMPRESS, "Z", NULL},
/* Else if we have gzip, incorporate the following */
#elif defined (HAVE_GZIP)
{PROG_GUNZIP, "Z", NULL},
#endif /* HAVE_COMPRESS || HAVE_GZIP */
/* If we have bzip2, incorporate the following */
#ifdef HAVE_BZIP2
{PROG_BUNZIP2, "bz2", NULL},
#endif /* HAVE_BZIP2 */
/* If we have xz, incorporate the following */
#ifdef HAVE_XZ
{PROG_UNXZ, "xz", NULL},
{PROG_UNXZ, "lzma", NULL},
/* Else if we have lzma, incorporate the following */
#elif defined (HAVE_LZMA)
{PROG_UNLZMA, "lzma", NULL},
#endif /* HAVE_XZ || HAVE_LZMA */
/* If we have lzip, incorporate the following */
#ifdef HAVE_LZIP
{PROG_UNLZIP, "lz", NULL},
#endif /* HAVE_LZIP */
/* If we have zstd, incorporate the following */
#ifdef HAVE_ZSTD
{PROG_UNZSTD, "zst", NULL},
{PROG_UNZSTD, "zstd", NULL},
#endif /* HAVE_ZSTD */
/*------------------------------------------------------*/
/* Add your decompressor(s) and extension(s) below here */
/*------------------------------------------------------*/
/*----------------*/
/* and above here */
/*----------------*/
/* ... and the last structure is */
{NULL, NULL, NULL}
};
/* Take filename as arg, return structure containing decompressor
and extension, or NULL if no comp extension found.
If want_stem, set comp->stem to the filename without extension, which
the caller should free.
eg.
filename = /usr/man/man1/foo.1.gz
comp->prog = "/usr/bin/gzip -dc";
comp->ext = "gz";
comp->stem = "/usr/man/man1/foo.1";
*/
struct compression *comp_info (const char *filename, bool want_stem)
{
const char *ext;
static struct compression hpux_comp =
{PROG_GUNZIP " -S \"\"", "", NULL};
ext = strrchr (filename, '.');
if (ext) {
struct compression *comp;
for (comp = comp_list; comp->ext; comp++) {
if (strcmp (comp->ext, ext + 1) == 0) {
if (want_stem)
comp->stem = xstrndup (filename,
ext - filename);
else
comp->stem = NULL;
return comp;
}
}
}
if (*PROG_GUNZIP) {
ext = strstr (filename, ".Z/");
if (ext) {
if (want_stem)
hpux_comp.stem = xstrndup (filename,
ext - filename);
else
hpux_comp.stem = NULL;
return &hpux_comp;
}
}
return NULL;
}
/* take filename w/o comp ext. as arg, return comp->stem as a relative
compressed file or NULL if none found */
struct compression *comp_file (const char *filename)
{
size_t len;
char *compfile;
struct compression *comp;
compfile = xasprintf ("%s.", filename);
assert (compfile);
len = strlen (compfile);
for (comp = comp_list; comp->ext; comp++) {
struct stat buf;
compfile = appendstr (compfile, comp->ext, (void *) 0);
if (stat (compfile, &buf) == 0) {
comp->stem = compfile;
return comp;
}
*(compfile + len) = '\0';
}
free (compfile);
return NULL;
}
|
