rpc.umntall.c revision 54341
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 29static const char rcsid[] = 30 "$FreeBSD: head/usr.sbin/rpc.umntall/rpc.umntall.c 54341 1999-12-08 22:29:30Z grog $"; 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 49int verbose; 50 51static int do_umount (char *, char *); 52static int do_umntall (char *); 53static int is_mounted (char *, char *); 54static void usage (void); 55int xdr_dir (XDR *, char *); 56 57struct mtablist *mtabhead; 58 59int 60main(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 mtab->mtab_time <= (time(now) - expire)) { 115 if (keep && is_mounted(mtab->mtab_host, 116 mtab->mtab_dirp)) { 117 if (verbose) { 118 warnx("skipping entry %s:%s", 119 mtab->mtab_host, 120 mtab->mtab_dirp); 121 } 122 } else if (do_umount(mtab->mtab_host, 123 mtab->mtab_dirp)) { 124 clean_mtab(mtab->mtab_host, 125 mtab->mtab_dirp); 126 } 127 } 128 } 129 /* Only do a RPC UMNTALL for this specific host */ 130 } else if (host != NULL && path == NULL) { 131 if (!do_umntall(host)) 132 exit(1); 133 else 134 success = 1; 135 /* Someone forgot to enter a hostname */ 136 } else if (host == NULL && path != NULL) 137 usage(); 138 /* Only do a RPC UMOUNT for this specific mount */ 139 else { 140 for (pathlen = strlen(path); 141 pathlen > 1 && path[pathlen - 1] == '/'; pathlen--) 142 path[pathlen - 1] = '\0'; 143 if (!do_umount(host, path)) 144 exit(1); 145 else 146 success = 1; 147 } 148 /* Write and unlink PATH_MOUNTTAB if necessary */ 149 if (success) { 150 if (verbose) 151 warnx("UMOUNT RPC successfully sent to %s", host); 152 if (read_mtab(mtab)) { 153 mtab = mtabhead; 154 clean_mtab(host, path); 155 } 156 } 157 if (!write_mtab()) { 158 free_mtab(); 159 exit(1); 160 } 161 free_mtab(); 162 exit(0); 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 */ 170int 171do_umntall(char *hostname) { 172 enum clnt_stat clnt_stat; 173 struct hostent *hp; 174 struct sockaddr_in saddr; 175 struct timeval pertry, try; 176 int so; 177 CLIENT *clp; 178 179 if ((hp = gethostbyname(hostname)) == NULL) { 180 warnx("gethostbyname(%s) failed", hostname); 181 return (0); 182 } 183 memset(&saddr, 0, sizeof(saddr)); 184 saddr.sin_family = AF_INET; 185 saddr.sin_port = 0; 186 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length, 187 sizeof(saddr.sin_addr))); 188 pertry.tv_sec = 3; 189 pertry.tv_usec = 0; 190 so = RPC_ANYSOCK; 191 if ((clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 192 pertry, &so)) == NULL) { 193 clnt_pcreateerror("Cannot send MNT PRC"); 194 return (0); 195 } 196 clp->cl_auth = authunix_create_default(); 197 try.tv_sec = 3; 198 try.tv_usec = 0; 199 clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0, 200 xdr_void, (caddr_t)0, try); 201 if (clnt_stat != RPC_SUCCESS) { 202 clnt_perror(clp, "Bad MNT RPC"); 203 return (0); 204 } else 205 return (1); 206} 207 208/* 209 * Send a RPC_MNT UMOUNT request for dirp to hostname. 210 */ 211int 212do_umount(char *hostname, char *dirp) { 213 enum clnt_stat clnt_stat; 214 struct hostent *hp; 215 struct sockaddr_in saddr; 216 struct timeval pertry, try; 217 CLIENT *clp; 218 int so; 219 220 if ((hp = gethostbyname(hostname)) == NULL) { 221 warnx("gethostbyname(%s) failed", hostname); 222 return (0); 223 } 224 memset(&saddr, 0, sizeof(saddr)); 225 saddr.sin_family = AF_INET; 226 saddr.sin_port = 0; 227 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length, 228 sizeof(saddr.sin_addr))); 229 pertry.tv_sec = 3; 230 pertry.tv_usec = 0; 231 so = RPC_ANYSOCK; 232 if ((clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 233 pertry, &so)) == NULL) { 234 clnt_pcreateerror("Cannot send MNT PRC"); 235 return (0); 236 } 237 clp->cl_auth = authunix_create_default(); 238 try.tv_sec = 3; 239 try.tv_usec = 0; 240 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp, 241 xdr_void, (caddr_t)0, try); 242 if (clnt_stat != RPC_SUCCESS) { 243 clnt_perror(clp, "Bad MNT RPC"); 244 return (0); 245 } 246 return (1); 247} 248 249/* 250 * Check if the entry is still/already mounted. 251 */ 252int 253is_mounted(char *hostname, char *dirp) { 254 struct statfs *mntbuf; 255 char name[MNAMELEN + 1]; 256 size_t bufsize, hostlen, dirlen; 257 int mntsize, i; 258 259 hostlen = strlen(hostname); 260 dirlen = strlen(dirp); 261 if ((hostlen + dirlen) >= MNAMELEN) 262 return (0); 263 memmove(name, hostname, hostlen); 264 name[hostlen] = ':'; 265 memmove(name + hostlen + 1, dirp, dirlen); 266 name[hostlen + dirlen + 1] = '\0'; 267 mntsize = getfsstat(NULL, 0, MNT_NOWAIT); 268 if (mntsize <= 0) 269 return (0); 270 bufsize = (mntsize + 1) * sizeof(struct statfs); 271 if ((mntbuf = malloc(bufsize)) == NULL) 272 err(1, "malloc"); 273 mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT); 274 for (i = mntsize - 1; i >= 0; i--) { 275 if (strcmp(mntbuf[i].f_mntfromname, name) == 0) { 276 free(mntbuf); 277 return (1); 278 } 279 } 280 free(mntbuf); 281 return (0); 282} 283 284/* 285 * xdr routines for mount rpc's 286 */ 287int 288xdr_dir(XDR *xdrsp, char *dirp) { 289 290 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 291} 292 293static void 294usage() { 295 296 (void)fprintf(stderr, "%s\n", 297 "usage: rpc.umntall [-h host] [-k] [-p path] [-t expire] [-v]"); 298 exit(1); 299} 300