umount.c revision 1.45
1 /* $NetBSD: umount.c,v 1.45 2013/06/29 23:06:29 christos 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 1.45 2013/06/29 23:06:29 christos 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 "mount_nfs.h" 71 #include "mountprog.h" 72 73 static int fake, verbose; 74 static char *nfshost; 75 static struct addrinfo *nfshost_ai = NULL; 76 77 static int namematch(const struct addrinfo *); 78 static int sacmp(const struct sockaddr *, const struct sockaddr *); 79 static int xdr_dir(XDR *, char *); 80 static const char *getmntproto(const char *); 81 #endif /* !SMALL */ 82 83 static int fflag; 84 static char *getmntname(const char *, mntwhat, char **); 85 static int umountfs(const char *, const char **, int); 86 static void usage(void) __dead; 87 88 int 89 main(int argc, char *argv[]) 90 { 91 int ch, errs, all = 0, raw = 0; 92 #ifndef SMALL 93 int mnts; 94 struct statvfs *mntbuf; 95 struct addrinfo hints; 96 #endif /* SMALL */ 97 const char **typelist = NULL; 98 99 /* Start disks transferring immediately. */ 100 sync(); 101 102 #ifdef SMALL 103 #define OPTS "fR" 104 #else 105 #define OPTS "AaFfh:Rt:v" 106 #endif 107 while ((ch = getopt(argc, argv, OPTS)) != -1) 108 switch (ch) { 109 case 'f': 110 fflag = MNT_FORCE; 111 break; 112 case 'R': 113 raw = 1; 114 break; 115 #ifndef SMALL 116 case 'A': 117 case 'a': 118 all = 1; 119 break; 120 case 'F': 121 fake = 1; 122 break; 123 case 'h': /* -h implies -A. */ 124 all = 1; 125 nfshost = optarg; 126 break; 127 case 't': 128 if (typelist != NULL) 129 errx(1, "only one -t option may be specified."); 130 typelist = makevfslist(optarg); 131 break; 132 case 'v': 133 verbose = 1; 134 break; 135 #endif /* !SMALL */ 136 default: 137 usage(); 138 /* NOTREACHED */ 139 } 140 argc -= optind; 141 argv += optind; 142 143 if ((argc == 0 && !all) || (argc != 0 && all) || (all && raw)) 144 usage(); 145 146 #ifndef SMALL 147 /* -h implies "-t nfs" if no -t flag. */ 148 if ((nfshost != NULL) && (typelist == NULL)) 149 typelist = makevfslist("nfs"); 150 151 if (nfshost != NULL) { 152 memset(&hints, 0, sizeof hints); 153 getaddrinfo(nfshost, NULL, &hints, &nfshost_ai); 154 } 155 156 errs = 0; 157 if (all) { 158 if ((mnts = getmntinfo(&mntbuf, ST_NOWAIT)) == 0) { 159 warn("getmntinfo"); 160 errs = 1; 161 } 162 for (errs = 0, mnts--; mnts > 0; mnts--) { 163 if (checkvfsname(mntbuf[mnts].f_fstypename, typelist)) 164 continue; 165 if (umountfs(mntbuf[mnts].f_mntonname, typelist, 166 1) != 0) 167 errs = 1; 168 } 169 } else 170 #endif /* !SMALL */ 171 for (errs = 0; *argv != NULL; ++argv) 172 if (umountfs(*argv, typelist, raw) != 0) 173 errs = 1; 174 return errs; 175 } 176 177 static int 178 umountfs(const char *name, const char **typelist, int raw) 179 { 180 #ifndef SMALL 181 enum clnt_stat clnt_stat; 182 struct timeval try; 183 CLIENT *clp; 184 char *hostp = NULL; 185 struct addrinfo *ai = NULL, hints; 186 #endif /* !SMALL */ 187 const char *mntpt; 188 char *type, rname[MAXPATHLEN]; 189 mntwhat what; 190 struct stat sb; 191 192 if (raw) { 193 mntpt = name; 194 } else { 195 196 what = MNTANY; 197 if (realpath(name, rname) != NULL) { 198 name = rname; 199 200 if (stat(name, &sb) == 0) { 201 if (S_ISBLK(sb.st_mode)) 202 what = MNTON; 203 else if (S_ISDIR(sb.st_mode)) 204 what = MNTFROM; 205 } 206 } 207 #ifdef SMALL 208 else { 209 warn("%s", rname); 210 return 1; 211 } 212 #endif /* SMALL */ 213 mntpt = name; 214 215 switch (what) { 216 case MNTON: 217 if ((mntpt = getmntname(name, MNTON, &type)) == NULL) { 218 warnx("%s: not currently mounted", name); 219 return (1); 220 } 221 break; 222 case MNTFROM: 223 if ((name = getmntname(mntpt, MNTFROM, &type)) == NULL) { 224 warnx("%s: not currently mounted", mntpt); 225 return (1); 226 } 227 break; 228 default: 229 if ((name = getmntname(mntpt, MNTFROM, &type)) == NULL) { 230 name = mntpt; 231 if ((mntpt = getmntname(name, MNTON, &type)) == NULL) { 232 warnx("%s: not currently mounted", name); 233 return 1; 234 } 235 } 236 } 237 238 #ifndef SMALL 239 if (checkvfsname(type, typelist)) 240 return 1; 241 242 (void)memset(&hints, 0, sizeof hints); 243 if (!strncmp(type, MOUNT_NFS, 244 sizeof(((struct statvfs *)NULL)->f_fstypename))) { 245 char *delimp; 246 /* look for host:mountpoint */ 247 if ((delimp = strrchr(name, ':')) != NULL) { 248 int len = delimp - name; 249 hostp = malloc(len + 1); 250 if (hostp == NULL) 251 return 1; 252 memcpy(hostp, name, len); 253 hostp[len] = 0; 254 name += len + 1; 255 getaddrinfo(hostp, NULL, &hints, &ai); 256 } 257 } 258 259 if (!namematch(ai)) 260 return 1; 261 #endif /* ! SMALL */ 262 } 263 264 #ifndef SMALL 265 if (verbose) 266 (void)printf("%s: unmount from %s\n", name, mntpt); 267 if (fake) 268 return 0; 269 #endif /* ! SMALL */ 270 271 if (unmount(mntpt, fflag) == -1) { 272 warn("%s", mntpt); 273 return 1; 274 } 275 276 #ifndef SMALL 277 if (ai != NULL && !(fflag & MNT_FORCE)) { 278 clp = clnt_create(hostp, RPCPROG_MNT, RPCMNT_VER1, 279 getmntproto(mntpt)); 280 if (clp == NULL) { 281 clnt_pcreateerror("Cannot MNT PRC"); 282 return 1; 283 } 284 clp->cl_auth = authsys_create_default(); 285 try.tv_sec = 20; 286 try.tv_usec = 0; 287 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, 288 __UNCONST(name), xdr_void, NULL, try); 289 if (clnt_stat != RPC_SUCCESS) { 290 clnt_perror(clp, "Bad MNT RPC"); 291 return 1; 292 } 293 auth_destroy(clp->cl_auth); 294 clnt_destroy(clp); 295 } 296 #endif /* ! SMALL */ 297 return 0; 298 } 299 300 static char * 301 getmntname(const char *name, mntwhat what, char **type) 302 { 303 static struct statvfs *mntbuf; 304 static int mntsize; 305 int i; 306 307 if (mntbuf == NULL && 308 (mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) { 309 warn("getmntinfo"); 310 return (NULL); 311 } 312 for (i = mntsize - 1; i >= 0; i--) { 313 if ((what == MNTON) && !strcmp(mntbuf[i].f_mntfromname, name)) { 314 if (type) 315 *type = mntbuf[i].f_fstypename; 316 return (mntbuf[i].f_mntonname); 317 } 318 if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) { 319 if (type) 320 *type = mntbuf[i].f_fstypename; 321 return (mntbuf[i].f_mntfromname); 322 } 323 } 324 return (NULL); 325 } 326 327 #ifndef SMALL 328 static int 329 sacmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 330 { 331 const void *p1, *p2; 332 size_t len; 333 334 if (sa1->sa_family != sa2->sa_family) 335 return 1; 336 337 switch (sa1->sa_family) { 338 case AF_INET: 339 p1 = &((const struct sockaddr_in *)sa1)->sin_addr; 340 p2 = &((const struct sockaddr_in *)sa2)->sin_addr; 341 len = 4; 342 break; 343 case AF_INET6: 344 p1 = &((const struct sockaddr_in6 *)sa1)->sin6_addr; 345 p2 = &((const struct sockaddr_in6 *)sa2)->sin6_addr; 346 len = 16; 347 if (((const struct sockaddr_in6 *)sa1)->sin6_scope_id != 348 ((const struct sockaddr_in6 *)sa2)->sin6_scope_id) 349 return 1; 350 break; 351 default: 352 return 1; 353 } 354 355 return memcmp(p1, p2, len); 356 } 357 358 static int 359 namematch(const struct addrinfo *ai) 360 { 361 struct addrinfo *aip; 362 363 if (nfshost == NULL || nfshost_ai == NULL) 364 return (1); 365 366 while (ai != NULL) { 367 aip = nfshost_ai; 368 while (aip != NULL) { 369 if (sacmp(ai->ai_addr, aip->ai_addr) == 0) 370 return 1; 371 aip = aip->ai_next; 372 } 373 ai = ai->ai_next; 374 } 375 376 return 0; 377 } 378 379 /* 380 * xdr routines for mount rpc's 381 */ 382 static int 383 xdr_dir(XDR *xdrsp, char *dirp) 384 { 385 return xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN); 386 } 387 388 static const char * 389 getmntproto(const char *mntpt) 390 { 391 struct nfs_args nfsargs; 392 struct sockaddr_storage sa; 393 int proto; 394 char *name; 395 396 memset(&sa, 0, sizeof(sa)); 397 nfsargs.addr = (struct sockaddr *)&sa; 398 nfsargs.addrlen = sizeof(sa); 399 if ((name = strdup(mntpt)) == NULL) 400 err(EXIT_FAILURE, "strdup"); 401 if (!getnfsargs(name, &nfsargs)) 402 proto = IPPROTO_UDP; 403 else 404 proto = nfsargs.proto; 405 free(name); 406 407 // XXX: Return udp6/tcp6 too? 408 return proto == IPPROTO_UDP ? "udp" : "tcp"; 409 } 410 #endif /* !SMALL */ 411 412 static void 413 usage(void) 414 { 415 #ifdef SMALL 416 (void)fprintf(stderr, 417 "Usage: %s [-fR] special | node\n", getprogname()); 418 #else 419 (void)fprintf(stderr, 420 "Usage: %s [-fvFR] [-t fstypelist] special | node\n" 421 "\t %s -a[fvF] [-h host] [-t fstypelist]\n", getprogname(), 422 getprogname()); 423 #endif /* SMALL */ 424 exit(1); 425 } 426
Indexes created Thu Oct 30 03:10:01 GMT 2025