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author | Stefan Metzmacher <metze@samba.org> | 2007-04-16 08:20:13 +0000 |
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committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 12:19:22 -0500 |
commit | 4a245a15803e3df93cdb197adfc1c1046c3a8716 (patch) | |
tree | a87d607df9b9ec9e1d00506ab631b5f1efa6ce44 /source3/lib/tdb/tools/tdbbackup.c | |
parent | 38bbe9a5da132b078f9a290a4145cb6c7a666259 (diff) | |
download | samba-4a245a15803e3df93cdb197adfc1c1046c3a8716.tar.gz samba-4a245a15803e3df93cdb197adfc1c1046c3a8716.tar.bz2 samba-4a245a15803e3df93cdb197adfc1c1046c3a8716.zip |
r22249: move tdb code to lib/tdb/ as in samba4
metze
(This used to be commit c7def92a9c2e17c90061ef17bc14e36250574e85)
Diffstat (limited to 'source3/lib/tdb/tools/tdbbackup.c')
-rw-r--r-- | source3/lib/tdb/tools/tdbbackup.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/source3/lib/tdb/tools/tdbbackup.c b/source3/lib/tdb/tools/tdbbackup.c new file mode 100644 index 0000000000..4ae5a4f921 --- /dev/null +++ b/source3/lib/tdb/tools/tdbbackup.c @@ -0,0 +1,155 @@ +/* + Unix SMB/CIFS implementation. + low level tdb backup and restore utility + Copyright (C) Andrew Tridgell 2002 + + This program 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 program 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* + + This program is meant for backup/restore of tdb databases. Typical usage would be: + tdbbackup *.tdb + when Samba shuts down cleanly, which will make a backup of all the local databases + to *.bak files. Then on Samba startup you would use: + tdbbackup -v *.tdb + and this will check the databases for corruption and if corruption is detected then + the backup will be restored. + + You may also like to do a backup on a regular basis while Samba is + running, perhaps using cron. + + The reason this program is needed is to cope with power failures + while Samba is running. A power failure could lead to database + corruption and Samba will then not start correctly. + + Note that many of the databases in Samba are transient and thus + don't need to be backed up, so you can optimise the above a little + by only running the backup on the critical databases. + + */ + +#ifdef STANDALONE +#if HAVE_CONFIG_H +#include <config.h> +#endif + +#include <errno.h> +#include <stdlib.h> +#include <stdio.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> +#include <fcntl.h> +#include <time.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <ctype.h> +#include <signal.h> + +#else + +#include "includes.h" + +#endif + +#include "tdb.h" +#include "tdbback.h" + +extern int optind; +extern char *optarg; + +/* + see if one file is newer than another +*/ +static int file_newer(const char *fname1, const char *fname2) +{ + struct stat st1, st2; + if (stat(fname1, &st1) != 0) { + return 0; + } + if (stat(fname2, &st2) != 0) { + return 1; + } + return (st1.st_mtime > st2.st_mtime); +} + +static void usage(void) +{ + printf("Usage: tdbbackup [options] <fname...>\n\n"); + printf(" -h this help message\n"); + printf(" -s suffix set the backup suffix\n"); + printf(" -v verify mode (restore if corrupt)\n"); + printf(" -n hashsize set the new hash size for the backup\n"); +} + + + int main(int argc, char *argv[]) +{ + int i; + int ret = 0; + int c; + int verify = 0; + int hashsize = 0; + const char *suffix = ".bak"; + + while ((c = getopt(argc, argv, "vhs:n:")) != -1) { + switch (c) { + case 'h': + usage(); + exit(0); + case 'v': + verify = 1; + break; + case 's': + suffix = optarg; + break; + case 'n': + hashsize = atoi(optarg); + break; + } + } + + argc -= optind; + argv += optind; + + if (argc < 1) { + usage(); + exit(1); + } + + for (i=0; i<argc; i++) { + const char *fname = argv[i]; + char *bak_name; + + bak_name = add_suffix(fname, suffix); + + if (verify) { + if (verify_tdb(fname, bak_name) != 0) { + ret = 1; + } + } else { + if (file_newer(fname, bak_name) && + backup_tdb(fname, bak_name, hashsize) != 0) { + ret = 1; + } + } + + free(bak_name); + } + + return ret; +} |