mksnap_ffs.c (138559) | mksnap_ffs.c (193051) |
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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 --- 18 unchanged lines hidden (view full) --- 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 * | 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 --- 18 unchanged lines hidden (view full) --- 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: head/sbin/mksnap_ffs/mksnap_ffs.c 138559 2004-12-08 11:54:50Z phk $ | 35 * $FreeBSD: head/sbin/mksnap_ffs/mksnap_ffs.c 193051 2009-05-29 19:18:41Z pjd $ |
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 <limits.h> | 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 <limits.h> |
47#include <mntopts.h> |
|
47#include <stdio.h> 48#include <stdlib.h> 49#include <string.h> 50#include <sysexits.h> 51#include <unistd.h> 52 | 48#include <stdio.h> 49#include <stdlib.h> 50#include <string.h> 51#include <sysexits.h> 52#include <unistd.h> 53 |
53void usage(void); | 54static void 55usage(void) 56{ |
54 | 57 |
58 errx(EX_USAGE, "usage: mksnap_ffs snapshot_name"); 59} 60 |
|
55int 56main(int argc, char **argv) 57{ | 61int 62main(int argc, char **argv) 63{ |
58 char *dir, *cp, path[PATH_MAX]; | 64 char errmsg[255], path[PATH_MAX]; 65 char *cp, *snapname; |
59 struct statfs stfsbuf; | 66 struct statfs stfsbuf; |
60 struct ufs_args args; | |
61 struct group *grp; 62 struct stat stbuf; | 67 struct group *grp; 68 struct stat stbuf; |
63 int fd; | 69 struct iovec *iov; 70 int fd, iovlen; |
64 | 71 |
65 if (argc != 3) | 72 if (argc == 2) 73 snapname = argv[1]; 74 else if (argc == 3) 75 snapname = argv[2]; /* Old usage. */ 76 else |
66 usage(); 67 | 77 usage(); 78 |
68 dir = argv[1]; 69 memset(&args, 0, sizeof args); 70 args.fspec = argv[2]; 71 | |
72 /* 73 * Check that the user running this program has permission 74 * to create and remove a snapshot file from the directory 75 * in which they have requested to have it made. If the 76 * directory is sticky and not owned by the user, then they 77 * will not be able to remove the snapshot when they are 78 * done with it. 79 */ | 79 /* 80 * Check that the user running this program has permission 81 * to create and remove a snapshot file from the directory 82 * in which they have requested to have it made. If the 83 * directory is sticky and not owned by the user, then they 84 * will not be able to remove the snapshot when they are 85 * done with it. 86 */ |
80 if (strlen(args.fspec) >= PATH_MAX) 81 errx(1, "pathname too long %s", args.fspec); 82 cp = strrchr(args.fspec, '/'); | 87 if (strlen(snapname) >= PATH_MAX) 88 errx(1, "pathname too long %s", snapname); 89 cp = strrchr(snapname, '/'); |
83 if (cp == NULL) { 84 strlcpy(path, ".", PATH_MAX); | 90 if (cp == NULL) { 91 strlcpy(path, ".", PATH_MAX); |
85 } else if (cp == args.fspec) { | 92 } else if (cp == snapname) { |
86 strlcpy(path, "/", PATH_MAX); 87 } else { | 93 strlcpy(path, "/", PATH_MAX); 94 } else { |
88 strlcpy(path, args.fspec, cp - args.fspec + 1); | 95 strlcpy(path, snapname, cp - snapname + 1); |
89 } 90 if (statfs(path, &stfsbuf) < 0) 91 err(1, "%s", path); 92 if (stat(path, &stbuf) < 0) 93 err(1, "%s", path); 94 if (!S_ISDIR(stbuf.st_mode)) 95 errx(1, "%s: Not a directory", path); 96 if (access(path, W_OK) < 0) 97 err(1, "Lack write permission in %s", path); 98 if ((stbuf.st_mode & S_ISTXT) && stbuf.st_uid != getuid()) 99 errx(1, "Lack write permission in %s: Sticky bit set", path); 100 101 /* 102 * Having verified access to the directory in which the 103 * snapshot is to be built, proceed with creating it. 104 */ 105 if ((grp = getgrnam("operator")) == NULL) 106 errx(1, "Cannot retrieve operator gid"); | 96 } 97 if (statfs(path, &stfsbuf) < 0) 98 err(1, "%s", path); 99 if (stat(path, &stbuf) < 0) 100 err(1, "%s", path); 101 if (!S_ISDIR(stbuf.st_mode)) 102 errx(1, "%s: Not a directory", path); 103 if (access(path, W_OK) < 0) 104 err(1, "Lack write permission in %s", path); 105 if ((stbuf.st_mode & S_ISTXT) && stbuf.st_uid != getuid()) 106 errx(1, "Lack write permission in %s: Sticky bit set", path); 107 108 /* 109 * Having verified access to the directory in which the 110 * snapshot is to be built, proceed with creating it. 111 */ 112 if ((grp = getgrnam("operator")) == NULL) 113 errx(1, "Cannot retrieve operator gid"); |
107 if (mount("ufs", dir, MNT_UPDATE | MNT_SNAPSHOT | stfsbuf.f_flags, 108 &args) < 0) 109 err(1, "Cannot create %s", args.fspec); 110 if ((fd = open(args.fspec, O_RDONLY)) < 0) 111 err(1, "Cannot open %s", args.fspec); | 114 115 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 116 build_iovec(&iov, &iovlen, "from", snapname, (size_t)-1); 117 build_iovec(&iov, &iovlen, "fspath", stfsbuf.f_mntonname, (size_t)-1); 118 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 119 build_iovec(&iov, &iovlen, "update", NULL, 0); 120 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 121 122 if (nmount(iov, iovlen, stfsbuf.f_flags) < 0) 123 err(1, "Cannot create snapshot %s: %s", snapname, errmsg); 124 if ((fd = open(snapname, O_RDONLY)) < 0) 125 err(1, "Cannot open %s", snapname); |
112 if (fstat(fd, &stbuf) != 0) | 126 if (fstat(fd, &stbuf) != 0) |
113 err(1, "Cannot stat %s", args.fspec); | 127 err(1, "Cannot stat %s", snapname); |
114 if ((stbuf.st_flags & SF_SNAPSHOT) == 0) | 128 if ((stbuf.st_flags & SF_SNAPSHOT) == 0) |
115 errx(1, "File %s is not a snapshot", args.fspec); | 129 errx(1, "File %s is not a snapshot", snapname); |
116 if (fchown(fd, -1, grp->gr_gid) != 0) | 130 if (fchown(fd, -1, grp->gr_gid) != 0) |
117 err(1, "Cannot chown %s", args.fspec); | 131 err(1, "Cannot chown %s", snapname); |
118 if (fchmod(fd, S_IRUSR | S_IRGRP) != 0) | 132 if (fchmod(fd, S_IRUSR | S_IRGRP) != 0) |
119 err(1, "Cannot chmod %s", args.fspec); | 133 err(1, "Cannot chmod %s", snapname); |
120 121 exit(EXIT_SUCCESS); 122} | 134 135 exit(EXIT_SUCCESS); 136} |
123 124void 125usage() 126{ 127 128 fprintf(stderr, "usage: mksnap_ffs mountpoint snapshot_name\n"); 129 exit(EX_USAGE); 130} | |