1 /* 2 * Copyright (c) 1999 Martin Blapp 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <sys/param.h> 34 #include <sys/ucred.h> 35 #include <sys/mount.h> 36 37 #include <rpc/rpc.h> 38 #include <nfs/rpcv2.h> 39 40 #include <err.h> 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "mounttab.h" 48 49 int verbose; 50 51 static int do_umount (char *, char *); 52 static int do_umntall (char *); 53 static int is_mounted (char *, char *); 54 static void usage (void); 55 int xdr_dir (XDR *, char *); 56 57 struct mtablist *mtabhead; 58 59 int 60 main(int argc, char **argv) { 61 int ch, keep, success, pathlen; 62 time_t expire, *now; 63 char *host, *path; 64 struct mtablist *mtab; 65 66 mtab = NULL; 67 now = NULL; 68 expire = 0; 69 host = path = '\0'; 70 success = keep = verbose = 0; 71 while ((ch = getopt(argc, argv, "h:kp:ve:")) != -1) 72 switch (ch) { 73 case 'h': 74 host = optarg; 75 break; 76 case 'e': 77 expire = (time_t)optarg; 78 break; 79 case 'k': 80 keep = 1; 81 break; 82 case 'p': 83 path = optarg; 84 break; 85 case 'v': 86 verbose = 1; 87 break; 88 case '?': 89 usage(); 90 default: 91 } 92 argc -= optind; 93 argv += optind; 94 95 /* Ignore SIGINT and SIGQUIT during shutdown */ 96 signal(SIGINT, SIG_IGN); 97 signal(SIGQUIT, SIG_IGN); 98 99 /* Default expiretime is two days */ 100 if (expire == 0) 101 expire = 172800; 102 /* 103 * Read PATH_MOUNTTAB and check each entry 104 * and do finally the unmounts. 105 */ 106 if (host == NULL && path == NULL) { 107 if (!read_mtab(mtab)) { 108 if (verbose) 109 warnx("nothing to do, remove %s", 110 PATH_MOUNTTAB); 111 } 112 for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) { 113 if (*mtab->mtab_host != '\0' && 114 (do_umntall(mtab->mtab_host) || 115 mtab->mtab_time <= (time(now) - expire))) { 116 if (keep && is_mounted(mtab->mtab_host, 117 mtab->mtab_dirp)) { 118 if (verbose) { 119 warnx("skipping entry %s:%s", 120 mtab->mtab_host, 121 mtab->mtab_dirp); 122 } 123 } else 124 clean_mtab(mtab->mtab_host, NULL); 125 } 126 } 127 /* Only do a RPC UMNTALL for this specific host */ 128 } else if (host != NULL && path == NULL) { 129 if (!do_umntall(host)) 130 exit(1); 131 else 132 success = 1; 133 /* Someone forgot to enter a hostname */ 134 } else if (host == NULL && path != NULL) 135 usage(); 136 /* Only do a RPC UMOUNT for this specific mount */ 137 else { 138 for (pathlen = strlen(path); 139 pathlen > 1 && path[pathlen - 1] == '/'; pathlen--) 140 path[pathlen - 1] = '\0'; 141 if (!do_umount(host, path)) 142 exit(1); 143 else 144 success = 1; 145 } 146 /* Write and unlink PATH_MOUNTTAB if necessary */ 147 if (success) { 148 if (verbose) 149 warnx("UMOUNT RPC successfully sent to %s", host); 150 if (read_mtab(mtab)) { 151 mtab = mtabhead; 152 clean_mtab(host, path); 153 } 154 } 155 if (!write_mtab()) { 156 free_mtab(); 157 exit(1); 158 } 159 free_mtab(); 160 exit(0); 161 } 162 163 /* 164 * Send a RPC_MNT UMNTALL request to hostname. 165 */ 166 int 167 do_umntall(char *hostname) { 168 enum clnt_stat clnt_stat; 169 struct hostent *hp; 170 struct sockaddr_in saddr; 171 struct timeval pertry, try; 172 int so; 173 CLIENT *clp; 174 175 if ((hp = gethostbyname(hostname)) == NULL) { 176 warnx("gethostbyname(%s) failed", hostname); 177 return (0); 178 } 179 memset(&saddr, 0, sizeof(saddr)); 180 saddr.sin_family = AF_INET; 181 saddr.sin_port = 0; 182 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length, 183 sizeof(saddr.sin_addr))); 184 pertry.tv_sec = 3; 185 pertry.tv_usec = 0; 186 so = RPC_ANYSOCK; 187 if ((clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 188 pertry, &so)) == NULL) { 189 clnt_pcreateerror("Cannot send MNT PRC"); 190 return (0); 191 } 192 clp->cl_auth = authunix_create_default(); 193 try.tv_sec = 3; 194 try.tv_usec = 0; 195 clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0, 196 xdr_void, (caddr_t)0, try); 197 if (clnt_stat != RPC_SUCCESS) { 198 clnt_perror(clp, "Bad MNT RPC"); 199 return (0); 200 } else 201 return (1); 202 } 203 204 /* 205 * Send a RPC_MNT UMOUNT request for dirp to hostname. 206 */ 207 int 208 do_umount(char *hostname, char *dirp) { 209 enum clnt_stat clnt_stat; 210 struct hostent *hp; 211 struct sockaddr_in saddr; 212 struct timeval pertry, try; 213 CLIENT *clp; 214 int so; 215 216 if ((hp = gethostbyname(hostname)) == NULL) { 217 warnx("gethostbyname(%s) failed", hostname); 218 return (0); 219 } 220 memset(&saddr, 0, sizeof(saddr)); 221 saddr.sin_family = AF_INET; 222 saddr.sin_port = 0; 223 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length, 224 sizeof(saddr.sin_addr))); 225 pertry.tv_sec = 3; 226 pertry.tv_usec = 0; 227 so = RPC_ANYSOCK; 228 if ((clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 229 pertry, &so)) == NULL) { 230 clnt_pcreateerror("Cannot send MNT PRC"); 231 return (0); 232 } 233 clp->cl_auth = authunix_create_default(); 234 try.tv_sec = 3; 235 try.tv_usec = 0; 236 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp, 237 xdr_void, (caddr_t)0, try); 238 if (clnt_stat != RPC_SUCCESS) { 239 clnt_perror(clp, "Bad MNT RPC"); 240 return (0); 241 } 242 return (1); 243 } 244 245 /* 246 * Check if the entry is still/already mounted. 247 */ 248 int 249 is_mounted(char *hostname, char *dirp) { 250 struct statfs *mntbuf; 251 char name[MNAMELEN + 1]; 252 size_t bufsize, hostlen, dirlen; 253 int mntsize, i; 254 255 hostlen = strlen(hostname); 256 dirlen = strlen(dirp); 257 if ((hostlen + dirlen) >= MNAMELEN) 258 return (0); 259 memmove(name, hostname, hostlen); 260 name[hostlen] = ':'; 261 memmove(name + hostlen + 1, dirp, dirlen); 262 name[hostlen + dirlen + 1] = '\0'; 263 mntsize = getfsstat(NULL, 0, MNT_NOWAIT); 264 if (mntsize <= 0) 265 return (0); 266 bufsize = (mntsize + 1) * sizeof(struct statfs); 267 if ((mntbuf = malloc(bufsize)) == NULL) 268 err(1, "malloc"); 269 mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT); 270 for (i = mntsize - 1; i >= 0; i--) { 271 if (strcmp(mntbuf[i].f_mntfromname, name) == 0) { 272 free(mntbuf); 273 return (1); 274 } 275 } 276 free(mntbuf); 277 return (0); 278 } 279 280 /* 281 * xdr routines for mount rpc's 282 */ 283 int 284 xdr_dir(XDR *xdrsp, char *dirp) { 285 286 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 287 } 288 289 static void 290 usage() { 291 292 (void)fprintf(stderr, "%s\n", 293 "usage: rpc.umntall [-h host] [-k] [-p path] [-t expire] [-v]"); 294 exit(1); 295 } 296