2 Unix SMB/CIFS implementation.
3 low level tdb backup and restore utility
4 Copyright (C) Andrew Tridgell 2002
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 This program is meant for backup/restore of tdb databases. Typical usage would be:
25 when Samba shuts down cleanly, which will make a backup of all the local databases
26 to *.bak files. Then on Samba startup you would use:
28 and this will check the databases for corruption and if corruption is detected then
29 the backup will be restored.
31 You may also like to do a backup on a regular basis while Samba is
32 running, perhaps using cron.
34 The reason this program is needed is to cope with power failures
35 while Samba is running. A power failure could lead to database
36 corruption and Samba will then not start correctly.
38 Note that many of the databases in Samba are transient and thus
39 don't need to be backed up, so you can optimise the above a little
40 by only running the backup on the critical databases.
73 see if one file is newer than another
75 static int file_newer(const char *fname1
, const char *fname2
)
78 if (stat(fname1
, &st1
) != 0) {
81 if (stat(fname2
, &st2
) != 0) {
84 return (st1
.st_mtime
> st2
.st_mtime
);
87 static void usage(void)
89 printf("Usage: tdbbackup [options] <fname...>\n\n");
90 printf(" -h this help message\n");
91 printf(" -s suffix set the backup suffix\n");
92 printf(" -v verify mode (restore if corrupt)\n");
96 int main(int argc
, char *argv
[])
102 const char *suffix
= ".bak";
106 while ((c
= getopt(argc
, argv
, "vhs:")) != -1) {
128 for (i
=0; i
<argc
; i
++) {
129 const char *fname
= argv
[i
];
132 bak_name
= add_suffix(fname
, suffix
);
135 if (verify_tdb(fname
, bak_name
) != 0) {
139 if (file_newer(fname
, bak_name
) &&
140 backup_tdb(fname
, bak_name
) != 0) {