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 int 58 main(int argc, char **argv) { 59 int ch, keep, success, pathlen; 60 time_t expire, now; 61 char *host, *path; 62 struct mtablist *mtab; 63 64 expire = 0; 65 host = path = NULL; 66 success = keep = verbose = 0; 67 while ((ch = getopt(argc, argv, "h:kp:ve:")) != -1) 68 switch (ch) { 69 case 'h': 70 host = optarg; 71 break; 72 case 'e': 73 expire = atoi(optarg); 74 break; 75 case 'k': 76 keep = 1; 77 break; 78 case 'p': 79 path = optarg; 80 break; 81 case 'v': 82 verbose = 1; 83 break; 84 case '?': 85 usage(); 86 default: 87 } 88 argc -= optind; 89 argv += optind; 90 91 /* Default expiretime is one day */ 92 if (expire == 0) 93 expire = 86400; 94 time(&now); 95 96 /* Read PATH_MOUNTTAB. */ 97 if (!read_mtab()) { 98 if (verbose) 99 warnx("no mounttab entries (%s does not exist)", 100 PATH_MOUNTTAB); 101 mtabhead = NULL; 102 } 103 104 if (host == NULL && path == NULL) { 105 /* Check each entry and do any necessary unmount RPCs. */ 106 for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) { 107 if (*mtab->mtab_host == '\0') 108 continue; 109 if (mtab->mtab_time + expire < now) { 110 /* Clear expired entry. */ 111 if (verbose) 112 warnx("remove expired entry %s:%s", 113 mtab->mtab_host, mtab->mtab_dirp); 114 bzero(mtab->mtab_host, 115 sizeof(mtab->mtab_host)); 116 continue; 117 } 118 if (keep && is_mounted(mtab->mtab_host, 119 mtab->mtab_dirp)) { 120 if (verbose) 121 warnx("skip entry %s:%s", 122 mtab->mtab_host, mtab->mtab_dirp); 123 continue; 124 } 125 if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) { 126 if (verbose) 127 warnx("umount RPC for %s:%s succeeded", 128 mtab->mtab_host, mtab->mtab_dirp); 129 /* Remove all entries for this host + path. */ 130 clean_mtab(mtab->mtab_host, mtab->mtab_dirp, 131 verbose); 132 } 133 } 134 success = 1; 135 } else { 136 if (host == NULL && path != NULL) 137 /* Missing hostname. */ 138 usage(); 139 if (path == NULL) { 140 /* Do a RPC UMNTALL for this specific host */ 141 success = do_umntall(host); 142 if (verbose && success) 143 warnx("umntall RPC for %s succeeded", host); 144 } else { 145 /* Do a RPC UMNTALL for this specific mount */ 146 for (pathlen = strlen(path); 147 pathlen > 1 && path[pathlen - 1] == '/'; pathlen--) 148 path[pathlen - 1] = '\0'; 149 success = do_umount(host, path); 150 if (verbose && success) 151 warnx("umount RPC for %s:%s succeeded", host, 152 path); 153 } 154 /* If successful, remove any corresponding mounttab entries. */ 155 if (success) 156 clean_mtab(host, path, verbose); 157 } 158 /* Write and unlink PATH_MOUNTTAB if necessary */ 159 if (success) 160 success = write_mtab(verbose); 161 free_mtab(); 162 exit (success ? 0 : 1); 163 } 164 165 /* 166 * Send a RPC_MNT UMNTALL request to hostname. 167 * XXX This works for all mountd implementations, 168 * but produces a RPC IOERR on non FreeBSD systems. 169 */ 170 int 171 do_umntall(char *hostname) { 172 enum clnt_stat clnt_stat; 173 struct timeval try; 174 CLIENT *clp; 175 176 clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp"); 177 if (clp == NULL) { 178 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT")); 179 return (0); 180 } 181 clp->cl_auth = authunix_create_default(); 182 try.tv_sec = 3; 183 try.tv_usec = 0; 184 clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0, 185 xdr_void, (caddr_t)0, try); 186 if (clnt_stat != RPC_SUCCESS) 187 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL")); 188 auth_destroy(clp->cl_auth); 189 clnt_destroy(clp); 190 return (clnt_stat == RPC_SUCCESS); 191 } 192 193 /* 194 * Send a RPC_MNT UMOUNT request for dirp to hostname. 195 */ 196 int 197 do_umount(char *hostname, char *dirp) { 198 enum clnt_stat clnt_stat; 199 struct timeval try; 200 CLIENT *clp; 201 202 clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp"); 203 if (clp == NULL) { 204 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT")); 205 return (0); 206 } 207 clp->cl_auth = authsys_create_default(); 208 try.tv_sec = 3; 209 try.tv_usec = 0; 210 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp, 211 xdr_void, (caddr_t)0, try); 212 if (clnt_stat != RPC_SUCCESS) 213 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT")); 214 auth_destroy(clp->cl_auth); 215 clnt_destroy(clp); 216 return (clnt_stat == RPC_SUCCESS); 217 } 218 219 /* 220 * Check if the entry is still/already mounted. 221 */ 222 int 223 is_mounted(char *hostname, char *dirp) { 224 struct statfs *mntbuf; 225 char name[MNAMELEN + 1]; 226 size_t bufsize; 227 int mntsize, i; 228 229 if (strlen(hostname) + strlen(dirp) >= MNAMELEN) 230 return (0); 231 snprintf(name, sizeof(name), "%s:%s", hostname, dirp); 232 mntsize = getfsstat(NULL, 0, MNT_NOWAIT); 233 if (mntsize <= 0) 234 return (0); 235 bufsize = (mntsize + 1) * sizeof(struct statfs); 236 if ((mntbuf = malloc(bufsize)) == NULL) 237 err(1, "malloc"); 238 mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT); 239 for (i = mntsize - 1; i >= 0; i--) { 240 if (strcmp(mntbuf[i].f_mntfromname, name) == 0) { 241 free(mntbuf); 242 return (1); 243 } 244 } 245 free(mntbuf); 246 return (0); 247 } 248 249 /* 250 * xdr routines for mount rpc's 251 */ 252 int 253 xdr_dir(XDR *xdrsp, char *dirp) { 254 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 255 } 256 257 static void 258 usage() { 259 (void)fprintf(stderr, "%s\n", 260 "usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]"); 261 exit(1); 262 } 263