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
|
/*
* libdpkg - Debian packaging suite library routines
* db-fsys-digest.c - management of filesystem digests database
*
* Copyright © 2012-2014 Guillem Jover <guillem@debian.org>
*
* This 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.
*
* This 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <dpkg/i18n.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/debug.h>
#include <dpkg/fdio.h>
#include <dpkg/dir.h>
#include <dpkg/db-ctrl.h>
#include <dpkg/db-fsys.h>
/*
* If mask is nonzero, will not write any file whose fsys_namenode
* has any flag bits set in mask.
*/
void
write_filehash_except(struct pkginfo *pkg, struct pkgbin *pkgbin,
struct fsys_namenode_list *list, enum fsys_namenode_flags mask)
{
struct atomic_file *file;
const char *hashfile;
debug(dbg_general, "generating infodb hashfile");
if (pkg_infodb_has_file(pkg, &pkg->available, HASHFILE))
return;
hashfile = pkg_infodb_get_file(pkg, pkgbin, HASHFILE);
file = atomic_file_new(hashfile, 0);
atomic_file_open(file);
for (; list; list = list->next) {
struct fsys_namenode *namenode = list->namenode;
if (mask && (namenode->flags & mask))
continue;
if (namenode->newhash == NULL)
continue;
fprintf(file->fp, "%s %s\n",
namenode->newhash, namenode->name + 1);
}
atomic_file_sync(file);
atomic_file_close(file);
atomic_file_commit(file);
atomic_file_free(file);
dir_sync_path(pkg_infodb_get_dir());
}
static void
parse_filehash_buffer(struct varbuf *buf,
struct pkginfo *pkg, struct pkgbin *pkgbin)
{
char *thisline, *nextline;
const char *pkgname = pkg_name(pkg, pnaw_nonambig);
const char *buf_end = buf->buf + buf->used;
for (thisline = buf->buf; thisline < buf_end; thisline = nextline) {
struct fsys_namenode *namenode;
char *endline, *hash_end, *filename;
endline = memchr(thisline, '\n', buf_end - thisline);
if (endline == NULL)
ohshit(_("control file '%s' for package '%s' is "
"missing final newline"), HASHFILE, pkgname);
/* The md5sum hash has a constant length. */
hash_end = thisline + MD5HASHLEN;
filename = hash_end + 2;
if (filename + 1 > endline)
ohshit(_("control file '%s' for package '%s' is "
"missing value"), HASHFILE, pkgname);
if (hash_end[0] != ' ' || hash_end[1] != ' ')
ohshit(_("control file '%s' for package '%s' is "
"missing value separator"), HASHFILE, pkgname);
hash_end[0] = '\0';
/* Where to start next time around. */
nextline = endline + 1;
/* Strip trailing ‘/’. */
if (endline > thisline && endline[-1] == '/')
endline--;
*endline = '\0';
if (endline == thisline)
ohshit(_("control file '%s' for package '%s' "
"contains empty filename"), HASHFILE, pkgname);
debug(dbg_eachfiledetail, "load digest '%s' for filename '%s'",
thisline, filename);
/* Add the file to the list. */
namenode = fsys_hash_find_node(filename, 0);
namenode->newhash = nfstrsave(thisline);
}
}
void
parse_filehash(struct pkginfo *pkg, struct pkgbin *pkgbin)
{
const char *hashfile;
struct varbuf buf = VARBUF_INIT;
struct dpkg_error err = DPKG_ERROR_INIT;
hashfile = pkg_infodb_get_file(pkg, pkgbin, HASHFILE);
if (file_slurp(hashfile, &buf, &err) < 0 && err.syserrno != ENOENT)
dpkg_error_print(&err,
_("loading control file '%s' for package '%s'"),
HASHFILE, pkg_name(pkg, pnaw_nonambig));
if (buf.used > 0)
parse_filehash_buffer(&buf, pkg, pkgbin);
varbuf_destroy(&buf);
}
|
