1 /*- 2 * Copyright (c) 1980, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1989, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)umount.c 8.8 (Berkeley) 5/8/95"; 43 #endif 44 static const char rcsid[] = 45 "$Id$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/mount.h> 51 52 #include <netdb.h> 53 #include <rpc/rpc.h> 54 #include <nfs/rpcv2.h> 55 56 #include <err.h> 57 #include <fstab.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 typedef enum { MNTON, MNTFROM } mntwhat; 64 65 int fake, fflag, vflag; 66 char *nfshost; 67 68 int checkvfsname __P((const char *, char **)); 69 char *getmntname __P((char *, mntwhat, char **)); 70 char **makevfslist __P((char *)); 71 int selected __P((int)); 72 int namematch __P((struct hostent *)); 73 int umountall __P((char **)); 74 int umountfs __P((char *, char **)); 75 void usage __P((void)); 76 int xdr_dir __P((XDR *, char *)); 77 78 int 79 main(argc, argv) 80 int argc; 81 char *argv[]; 82 { 83 int all, ch, errs, mnts; 84 char **typelist = NULL; 85 struct statfs *mntbuf; 86 87 /* Start disks transferring immediately. */ 88 sync(); 89 90 all = 0; 91 while ((ch = getopt(argc, argv, "AaFfh:t:v")) != -1) 92 switch (ch) { 93 case 'A': 94 all = 2; 95 break; 96 case 'a': 97 all = 1; 98 break; 99 case 'F': 100 fake = 1; 101 break; 102 case 'f': 103 fflag = MNT_FORCE; 104 break; 105 case 'h': /* -h implies -A. */ 106 all = 2; 107 nfshost = optarg; 108 break; 109 case 't': 110 if (typelist != NULL) 111 errx(1, "only one -t option may be specified"); 112 typelist = makevfslist(optarg); 113 break; 114 case 'v': 115 vflag = 1; 116 break; 117 default: 118 usage(); 119 /* NOTREACHED */ 120 } 121 argc -= optind; 122 argv += optind; 123 124 if ((argc == 0 && !all) || (argc != 0 && all)) 125 usage(); 126 127 /* -h implies "-t nfs" if no -t flag. */ 128 if ((nfshost != NULL) && (typelist == NULL)) 129 typelist = makevfslist("nfs"); 130 131 switch (all) { 132 case 2: 133 if ((mnts = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) { 134 warn("getmntinfo"); 135 errs = 1; 136 break; 137 } 138 for (errs = 0, mnts--; mnts > 0; mnts--) { 139 if (checkvfsname(mntbuf[mnts].f_fstypename, typelist)) 140 continue; 141 if (umountfs(mntbuf[mnts].f_mntonname, typelist) != 0) 142 errs = 1; 143 } 144 break; 145 case 1: 146 if (setfsent() == 0) 147 err(1, "%s", _PATH_FSTAB); 148 errs = umountall(typelist); 149 break; 150 case 0: 151 for (errs = 0; *argv != NULL; ++argv) 152 if (umountfs(*argv, typelist) != 0) 153 errs = 1; 154 break; 155 } 156 exit(errs); 157 } 158 159 int 160 umountall(typelist) 161 char **typelist; 162 { 163 struct fstab *fs; 164 int rval; 165 char *cp; 166 struct vfsconf vfc; 167 168 while ((fs = getfsent()) != NULL) { 169 /* Ignore the root. */ 170 if (strcmp(fs->fs_file, "/") == 0) 171 continue; 172 /* 173 * !!! 174 * Historic practice: ignore unknown FSTAB_* fields. 175 */ 176 if (strcmp(fs->fs_type, FSTAB_RW) && 177 strcmp(fs->fs_type, FSTAB_RO) && 178 strcmp(fs->fs_type, FSTAB_RQ)) 179 continue; 180 /* If an unknown file system type, complain. */ 181 if (getvfsbyname(fs->fs_vfstype, &vfc) < 0) { 182 warnx("%s: unknown mount type", fs->fs_vfstype); 183 continue; 184 } 185 if (checkvfsname(fs->fs_vfstype, typelist)) 186 continue; 187 188 /* 189 * We want to unmount the file systems in the reverse order 190 * that they were mounted. So, we save off the file name 191 * in some allocated memory, and then call recursively. 192 */ 193 if ((cp = malloc((size_t)strlen(fs->fs_file) + 1)) == NULL) 194 errx(1, "malloc failed"); 195 (void)strcpy(cp, fs->fs_file); 196 rval = umountall(typelist); 197 return (umountfs(cp, typelist) || rval); 198 } 199 return (0); 200 } 201 202 int 203 umountfs(name, typelist) 204 char *name; 205 char **typelist; 206 { 207 enum clnt_stat clnt_stat; 208 struct hostent *hp; 209 struct sockaddr_in saddr; 210 struct stat sb; 211 struct timeval pertry, try; 212 CLIENT *clp; 213 int so; 214 char *type, *delimp, *hostp, *mntpt, *origname, rname[MAXPATHLEN]; 215 216 if (realpath(name, rname) == NULL) { 217 /* Continue and let the system call check it... */ 218 strcpy(rname, name); 219 } 220 221 origname = name; 222 if (stat(name, &sb) < 0) { 223 mntpt = rname; 224 if ((getmntname(rname, MNTFROM, &type) == NULL) && 225 ((mntpt = getmntname(name, MNTON, &type)) == NULL)) { 226 warnx("%s: not currently mounted", name); 227 return (1); 228 } 229 } else if (S_ISBLK(sb.st_mode)) { 230 if ((mntpt = getmntname(name, MNTON, &type)) == NULL) { 231 warnx("%s: not currently mounted", name); 232 return (1); 233 } 234 } else if (S_ISDIR(sb.st_mode)) { 235 mntpt = rname; 236 if (getmntname(mntpt, MNTFROM, &type) == NULL) { 237 warnx("%s: not currently mounted", name); 238 return (1); 239 } 240 } else { 241 warnx("%s: not a directory or special device", name); 242 return (1); 243 } 244 name = rname; 245 246 if (checkvfsname(type, typelist)) 247 return (1); 248 249 hp = NULL; 250 if (!strcmp(type, "nfs")) { 251 if ((delimp = strchr(name, '@')) != NULL) { 252 hostp = delimp + 1; 253 *delimp = '\0'; 254 hp = gethostbyname(hostp); 255 *delimp = '@'; 256 } else if ((delimp = strchr(name, ':')) != NULL) { 257 *delimp = '\0'; 258 hostp = name; 259 hp = gethostbyname(hostp); 260 name = delimp + 1; 261 *delimp = ':'; 262 } 263 } 264 265 if (!namematch(hp)) 266 return (1); 267 268 if (vflag) 269 (void)printf("%s: unmount from %s\n", origname, mntpt); 270 if (fake) 271 return (0); 272 273 if (unmount(mntpt, fflag) < 0) { 274 warn("%s", mntpt); 275 return (1); 276 } 277 278 if ((hp != NULL) && !(fflag & MNT_FORCE)) { 279 *delimp = '\0'; 280 memset(&saddr, 0, sizeof(saddr)); 281 saddr.sin_family = AF_INET; 282 saddr.sin_port = 0; 283 memmove(&saddr.sin_addr, hp->h_addr, 284 MIN(hp->h_length, sizeof(saddr.sin_addr))); 285 pertry.tv_sec = 3; 286 pertry.tv_usec = 0; 287 so = RPC_ANYSOCK; 288 if ((clp = clntudp_create(&saddr, 289 RPCPROG_MNT, RPCMNT_VER1, pertry, &so)) == NULL) { 290 clnt_pcreateerror("Cannot MNT PRC"); 291 return (1); 292 } 293 clp->cl_auth = authunix_create_default(); 294 try.tv_sec = 20; 295 try.tv_usec = 0; 296 clnt_stat = clnt_call(clp, 297 RPCMNT_UMOUNT, xdr_dir, name, xdr_void, (caddr_t)0, try); 298 if (clnt_stat != RPC_SUCCESS) { 299 clnt_perror(clp, "Bad MNT RPC"); 300 return (1); 301 } 302 auth_destroy(clp->cl_auth); 303 clnt_destroy(clp); 304 } 305 return (0); 306 } 307 308 char * 309 getmntname(name, what, type) 310 char *name; 311 mntwhat what; 312 char **type; 313 { 314 static struct statfs *mntbuf; 315 static int mntsize; 316 int i; 317 318 if (mntbuf == NULL && 319 (mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) { 320 warn("getmntinfo"); 321 return (NULL); 322 } 323 for (i = 0; i < mntsize; i++) { 324 if ((what == MNTON) && !strcmp(mntbuf[i].f_mntfromname, name)) { 325 if (type) 326 *type = mntbuf[i].f_fstypename; 327 return (mntbuf[i].f_mntonname); 328 } 329 if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) { 330 if (type) 331 *type = mntbuf[i].f_fstypename; 332 return (mntbuf[i].f_mntfromname); 333 } 334 } 335 return (NULL); 336 } 337 338 int 339 namematch(hp) 340 struct hostent *hp; 341 { 342 char *cp, **np; 343 344 if ((hp == NULL) || (nfshost == NULL)) 345 return (1); 346 347 if (strcasecmp(nfshost, hp->h_name) == 0) 348 return (1); 349 350 if ((cp = strchr(hp->h_name, '.')) != NULL) { 351 *cp = '\0'; 352 if (strcasecmp(nfshost, hp->h_name) == 0) 353 return (1); 354 } 355 for (np = hp->h_aliases; *np; np++) { 356 if (strcasecmp(nfshost, *np) == 0) 357 return (1); 358 if ((cp = strchr(*np, '.')) != NULL) { 359 *cp = '\0'; 360 if (strcasecmp(nfshost, *np) == 0) 361 return (1); 362 } 363 } 364 return (0); 365 } 366 367 /* 368 * xdr routines for mount rpc's 369 */ 370 int 371 xdr_dir(xdrsp, dirp) 372 XDR *xdrsp; 373 char *dirp; 374 { 375 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 376 } 377 378 void 379 usage() 380 { 381 (void)fprintf(stderr, "%s\n%s\n", 382 "usage: umount [-fv] special | node", 383 " umount -a | -A [-fv] [-h host] [-t type]"); 384 exit(1); 385 } 386