1 /* 2 * Copyright (c) 2003 Networks Associates Technology, Inc. 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project by Marshall 6 * Kirk McKusick and Network Associates Laboratories, the Security 7 * Research Division of Network Associates, Inc. under DARPA/SPAWAR 8 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 9 * research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $FreeBSD$ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/mount.h> 40 #include <sys/stat.h> 41 #include <ufs/ufs/ufsmount.h> 42 #include <err.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <grp.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <sysexits.h> 50 #include <unistd.h> 51 52 void 53 usage() 54 { 55 56 fprintf(stderr, "usage: mksnap_ffs mountpoint file\n"); 57 exit(EX_USAGE); 58 } 59 60 int 61 main(int argc, char **argv) 62 { 63 const char *dir; 64 struct ufs_args args; 65 struct group *grp; 66 struct stat stbuf; 67 int fd; 68 69 if (argc != 3) 70 usage(); 71 72 dir = argv[1]; 73 args.fspec = argv[2]; 74 75 if ((grp = getgrnam("operator")) == NULL) 76 errx(1, "Cannot retrieve operator gid"); 77 if (mount("ffs", dir, MNT_UPDATE | MNT_SNAPSHOT, &args) < 0) 78 err(1, "Cannot create %s", args.fspec); 79 if ((fd = open(args.fspec, O_RDONLY)) < 0) 80 err(1, "Cannot open %s", args.fspec); 81 if (fstat(fd, &stbuf) != 0) 82 err(1, "Cannot stat %s", args.fspec); 83 if ((stbuf.st_flags & SF_SNAPSHOT) == 0) 84 errx(1, "File %s is not a snapshot", args.fspec); 85 if (fchown(fd, -1, grp->gr_gid) != 0) 86 err(1, "Cannot chown %s", args.fspec); 87 if (fchmod(fd, S_IRUSR | S_IRGRP) != 0) 88 err(1, "Cannot chmod %s", args.fspec); 89 90 exit(EXIT_SUCCESS); 91 } 92