/* 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. */ #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> #include "tdb.h" #include "tdbback.h" /* 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"); } int main(int argc, char *argv[]) { int i; int ret = 0; int c; int verify = 0; const char *suffix = ".bak"; extern int optind; extern char *optarg; while ((c = getopt(argc, argv, "vhs:")) != -1) { switch (c) { case 'h': usage(); exit(0); case 'v': verify = 1; break; case 's': suffix = 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) != 0) { ret = 1; } } free(bak_name); } return ret; }