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
|
/*
* dpkg - main program for package management
* filesdb-hash.c - management of database of files installed on system
*
* 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 "filesdb.h"
#include "infodb.h"
/*
* If mask is nonzero, will not write any file whose filenamenode
* has any flag bits set in mask.
*/
void
write_filehash_except(struct pkginfo *pkg, struct pkgbin *pkgbin,
struct fileinlist *list, enum filenamenode_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 filenamenode *namenode = list->namenode;
if (mask && (namenode->flags & mask))
continue;
if (strcmp(namenode->newhash, EMPTYHASHFLAG) == 0)
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(char *buf, char *buf_end,
struct pkginfo *pkg, struct pkgbin *pkgbin)
{
char *thisline, *nextline;
const char *pkgname = pkg_name(pkg, pnaw_nonambig);
for (thisline = buf; thisline < buf_end; thisline = nextline) {
struct filenamenode *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 hash '%s' for filename '%s'",
thisline, filename);
/* Add the file to the list. */
namenode = findnamenode(filename, fnn_nocopy);
namenode->newhash = thisline;
}
}
void
parse_filehash(struct pkginfo *pkg, struct pkgbin *pkgbin)
{
static int fd;
const char *hashfile;
struct stat st;
hashfile = pkg_infodb_get_file(pkg, pkgbin, HASHFILE);
fd = open(hashfile, O_RDONLY);
if (fd < 0) {
if (errno == ENOENT)
return;
ohshite(_("cannot open control file '%s' for package '%s'"),
HASHFILE, pkg_name(pkg, pnaw_nonambig));
}
if (fstat(fd, &st) < 0)
ohshite(_("cannot stat control file '%s' for package '%s'"),
HASHFILE, pkg_name(pkg, pnaw_nonambig));
if (!S_ISREG(st.st_mode))
ohshit(_("control file '%s' for package '%s' is not a regular file"),
HASHFILE, pkg_name(pkg, pnaw_nonambig));
if (st.st_size > 0) {
char *buf, *buf_end;
buf = nfmalloc(st.st_size);
buf_end = buf + st.st_size;
if (fd_read(fd, buf, st.st_size) < 0)
ohshite(_("cannot read control file '%s' for package '%s'"),
HASHFILE, pkg_name(pkg, pnaw_nonambig));
parse_filehash_buffer(buf, buf_end, pkg, pkgbin);
}
if (close(fd))
ohshite(_("cannot close control file '%s' for package '%s'"),
HASHFILE, pkg_name(pkg, pnaw_nonambig));
}
|
