1 /* $NetBSD: umount.c,v 1.43 2008/08/05 20:57:45 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1989, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)umount.c 8.8 (Berkeley) 5/8/95"; 41 #else 42 __RCSID("$NetBSD: umount.c,v 1.43 2008/08/05 20:57:45 pooka Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/stat.h> 48 #include <sys/mount.h> 49 #include <sys/time.h> 50 #ifndef SMALL 51 #include <sys/socket.h> 52 53 #include <netdb.h> 54 #include <rpc/rpc.h> 55 #include <rpc/pmap_clnt.h> 56 #include <rpc/pmap_prot.h> 57 #include <nfs/rpcv2.h> 58 #endif /* !SMALL */ 59 60 #include <err.h> 61 #include <fstab.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 typedef enum { MNTANY, MNTON, MNTFROM } mntwhat; 68 69 #ifndef SMALL 70 #include "mountprog.h" 71 72 static int fake, verbose; 73 static char *nfshost; 74 static struct addrinfo *nfshost_ai = NULL; 75 76 static int namematch(const struct addrinfo *); 77 static int sacmp(const struct sockaddr *, const struct sockaddr *); 78 static int xdr_dir(XDR *, char *); 79 #endif /* !SMALL */ 80 81 static int fflag; 82 static char *getmntname(const char *, mntwhat, char **); 83 static int umountfs(const char *, const char **, int); 84 static void usage(void) __dead; 85 86 int 87 main(int argc, char *argv[]) 88 { 89 int ch, errs, all = 0, raw = 0; 90 #ifndef SMALL 91 int mnts; 92 struct statvfs *mntbuf; 93 struct addrinfo hints; 94 #endif /* SMALL */ 95 const char **typelist = NULL; 96 97 /* Start disks transferring immediately. */ 98 sync(); 99 100 #ifdef SMALL 101 #define OPTS "fR" 102 #else 103 #define OPTS "AaFfh:Rt:v" 104 #endif 105 while ((ch = getopt(argc, argv, OPTS)) != -1) 106 switch (ch) { 107 case 'f': 108 fflag = MNT_FORCE; 109 break; 110 case 'R': 111 raw = 1; 112 break; 113 #ifndef SMALL 114 case 'A': 115 case 'a': 116 all = 1; 117 break; 118 case 'F': 119 fake = 1; 120 break; 121 case 'h': /* -h implies -A. */ 122 all = 1; 123 nfshost = optarg; 124 break; 125 case 't': 126 if (typelist != NULL) 127 errx(1, "only one -t option may be specified."); 128 typelist = makevfslist(optarg); 129 break; 130 case 'v': 131 verbose = 1; 132 break; 133 #endif /* !SMALL */ 134 default: 135 usage(); 136 /* NOTREACHED */ 137 } 138 argc -= optind; 139 argv += optind; 140 141 if ((argc == 0 && !all) || (argc != 0 && all) || (all && raw)) 142 usage(); 143 144 #ifndef SMALL 145 /* -h implies "-t nfs" if no -t flag. */ 146 if ((nfshost != NULL) && (typelist == NULL)) 147 typelist = makevfslist("nfs"); 148 149 if (nfshost != NULL) { 150 memset(&hints, 0, sizeof hints); 151 getaddrinfo(nfshost, NULL, &hints, &nfshost_ai); 152 } 153 154 errs = 0; 155 if (all) { 156 if ((mnts = getmntinfo(&mntbuf, ST_NOWAIT)) == 0) { 157 warn("getmntinfo"); 158 errs = 1; 159 } 160 for (errs = 0, mnts--; mnts > 0; mnts--) { 161 if (checkvfsname(mntbuf[mnts].f_fstypename, typelist)) 162 continue; 163 if (umountfs(mntbuf[mnts].f_mntonname, typelist, 164 1) != 0) 165 errs = 1; 166 } 167 } else 168 #endif /* !SMALL */ 169 for (errs = 0; *argv != NULL; ++argv) 170 if (umountfs(*argv, typelist, raw) != 0) 171 errs = 1; 172 return errs; 173 } 174 175 static int 176 umountfs(const char *name, const char **typelist, int raw) 177 { 178 #ifndef SMALL 179 enum clnt_stat clnt_stat; 180 struct timeval try; 181 CLIENT *clp; 182 char *hostp = NULL; 183 struct addrinfo *ai = NULL, hints; 184 #endif /* !SMALL */ 185 const char *mntpt; 186 char *type, rname[MAXPATHLEN]; 187 mntwhat what; 188 struct stat sb; 189 190 if (raw) { 191 mntpt = name; 192 } else { 193 194 what = MNTANY; 195 if (realpath(name, rname) != NULL) { 196 name = rname; 197 198 if (stat(name, &sb) == 0) { 199 if (S_ISBLK(sb.st_mode)) 200 what = MNTON; 201 else if (S_ISDIR(sb.st_mode)) 202 what = MNTFROM; 203 } 204 } 205 #ifdef SMALL 206 else { 207 warn("%s", rname); 208 return 1; 209 } 210 #endif /* SMALL */ 211 mntpt = name; 212 213 switch (what) { 214 case MNTON: 215 if ((mntpt = getmntname(name, MNTON, &type)) == NULL) { 216 warnx("%s: not currently mounted", name); 217 return (1); 218 } 219 break; 220 case MNTFROM: 221 if ((name = getmntname(mntpt, MNTFROM, &type)) == NULL) { 222 warnx("%s: not currently mounted", mntpt); 223 return (1); 224 } 225 break; 226 default: 227 if ((name = getmntname(mntpt, MNTFROM, &type)) == NULL) { 228 name = mntpt; 229 if ((mntpt = getmntname(name, MNTON, &type)) == NULL) { 230 warnx("%s: not currently mounted", name); 231 return 1; 232 } 233 } 234 } 235 236 #ifndef SMALL 237 if (checkvfsname(type, typelist)) 238 return 1; 239 240 (void)memset(&hints, 0, sizeof hints); 241 if (!strncmp(type, MOUNT_NFS, 242 sizeof(((struct statvfs *)NULL)->f_fstypename))) { 243 char *delimp; 244 /* look for host:mountpoint */ 245 if ((delimp = strrchr(name, ':')) != NULL) { 246 int len = delimp - name; 247 hostp = malloc(len + 1); 248 if (hostp == NULL) 249 return 1; 250 memcpy(hostp, name, len); 251 hostp[len] = 0; 252 name += len + 1; 253 getaddrinfo(hostp, NULL, &hints, &ai); 254 } 255 } 256 257 if (!namematch(ai)) 258 return 1; 259 #endif /* ! SMALL */ 260 } 261 262 #ifndef SMALL 263 if (verbose) 264 (void)printf("%s: unmount from %s\n", name, mntpt); 265 if (fake) 266 return 0; 267 #endif /* ! SMALL */ 268 269 if (unmount(mntpt, fflag) == -1) { 270 warn("%s", mntpt); 271 return 1; 272 } 273 274 #ifndef SMALL 275 if (ai != NULL && !(fflag & MNT_FORCE)) { 276 clp = clnt_create(hostp, RPCPROG_MNT, RPCMNT_VER1, "udp"); 277 if (clp == NULL) { 278 clnt_pcreateerror("Cannot MNT PRC"); 279 return 1; 280 } 281 clp->cl_auth = authsys_create_default(); 282 try.tv_sec = 20; 283 try.tv_usec = 0; 284 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, 285 __UNCONST(name), xdr_void, NULL, try); 286 if (clnt_stat != RPC_SUCCESS) { 287 clnt_perror(clp, "Bad MNT RPC"); 288 return 1; 289 } 290 auth_destroy(clp->cl_auth); 291 clnt_destroy(clp); 292 } 293 #endif /* ! SMALL */ 294 return 0; 295 } 296 297 static char * 298 getmntname(const char *name, mntwhat what, char **type) 299 { 300 static struct statvfs *mntbuf; 301 static int mntsize; 302 int i; 303 304 if (mntbuf == NULL && 305 (mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) { 306 warn("getmntinfo"); 307 return (NULL); 308 } 309 for (i = mntsize - 1; i >= 0; i--) { 310 if ((what == MNTON) && !strcmp(mntbuf[i].f_mntfromname, name)) { 311 if (type) 312 *type = mntbuf[i].f_fstypename; 313 return (mntbuf[i].f_mntonname); 314 } 315 if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) { 316 if (type) 317 *type = mntbuf[i].f_fstypename; 318 return (mntbuf[i].f_mntfromname); 319 } 320 } 321 return (NULL); 322 } 323 324 #ifndef SMALL 325 static int 326 sacmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 327 { 328 const void *p1, *p2; 329 size_t len; 330 331 if (sa1->sa_family != sa2->sa_family) 332 return 1; 333 334 switch (sa1->sa_family) { 335 case AF_INET: 336 p1 = &((const struct sockaddr_in *)sa1)->sin_addr; 337 p2 = &((const struct sockaddr_in *)sa2)->sin_addr; 338 len = 4; 339 break; 340 case AF_INET6: 341 p1 = &((const struct sockaddr_in6 *)sa1)->sin6_addr; 342 p2 = &((const struct sockaddr_in6 *)sa2)->sin6_addr; 343 len = 16; 344 if (((const struct sockaddr_in6 *)sa1)->sin6_scope_id != 345 ((const struct sockaddr_in6 *)sa2)->sin6_scope_id) 346 return 1; 347 break; 348 default: 349 return 1; 350 } 351 352 return memcmp(p1, p2, len); 353 } 354 355 static int 356 namematch(const struct addrinfo *ai) 357 { 358 struct addrinfo *aip; 359 360 if (nfshost == NULL || nfshost_ai == NULL) 361 return (1); 362 363 while (ai != NULL) { 364 aip = nfshost_ai; 365 while (aip != NULL) { 366 if (sacmp(ai->ai_addr, aip->ai_addr) == 0) 367 return 1; 368 aip = aip->ai_next; 369 } 370 ai = ai->ai_next; 371 } 372 373 return 0; 374 } 375 376 /* 377 * xdr routines for mount rpc's 378 */ 379 static int 380 xdr_dir(XDR *xdrsp, char *dirp) 381 { 382 return xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN); 383 } 384 #endif /* !SMALL */ 385 386 static void 387 usage(void) 388 { 389 #ifdef SMALL 390 (void)fprintf(stderr, 391 "Usage: %s [-fR] special | node\n", getprogname()); 392 #else 393 (void)fprintf(stderr, 394 "Usage: %s [-fvFR] [-t fstypelist] special | node\n" 395 "\t %s -a[fvF] [-h host] [-t fstypelist]\n", getprogname(), 396 getprogname()); 397 #endif /* SMALL */ 398 exit(1); 399 } 400