2 * Copyright (c) 1999 Martin Blapp
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/usr.sbin/rpc.umntall/rpc.umntall.c,v 1.3.2.1 2001/12/13 01:27:20 iedowse Exp $
27 * $DragonFly: src/usr.sbin/rpc.umntall/rpc.umntall.c,v 1.4 2004/06/19 20:38:22 joerg Exp $
30 #include <sys/param.h>
31 #include <sys/ucred.h>
32 #include <sys/mount.h>
35 #include <nfs/rpcv2.h>
50 static int do_umount (char *, char *);
51 static int do_umntall (char *);
52 static int is_mounted (char *, char *);
53 static void usage (void);
54 static struct hostent *gethostbyname_quick(const char *name);
56 int xdr_dir (XDR *, char *);
59 main(int argc, char **argv) {
60 int ch, keep, success, pathlen;
63 struct mtablist *mtab;
67 success = keep = verbose = 0;
68 while ((ch = getopt(argc, argv, "h:kp:vfe:")) != -1)
74 expire = atoi(optarg);
96 /* Default expiretime is one day */
101 /* Read PATH_MOUNTTAB. */
104 warnx("no mounttab entries (%s does not exist)",
109 if (host == NULL && path == NULL) {
110 /* Check each entry and do any necessary unmount RPCs. */
111 for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) {
112 if (*mtab->mtab_host == '\0')
114 if (mtab->mtab_time + expire < now) {
115 /* Clear expired entry. */
117 warnx("remove expired entry %s:%s",
118 mtab->mtab_host, mtab->mtab_dirp);
119 bzero(mtab->mtab_host,
120 sizeof(mtab->mtab_host));
123 if (keep && is_mounted(mtab->mtab_host,
126 warnx("skip entry %s:%s",
127 mtab->mtab_host, mtab->mtab_dirp);
130 if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) {
132 warnx("umount RPC for %s:%s succeeded",
133 mtab->mtab_host, mtab->mtab_dirp);
134 /* Remove all entries for this host + path. */
135 clean_mtab(mtab->mtab_host, mtab->mtab_dirp,
141 if (host == NULL && path != NULL)
142 /* Missing hostname. */
145 /* Do a RPC UMNTALL for this specific host */
146 success = do_umntall(host);
147 if (verbose && success)
148 warnx("umntall RPC for %s succeeded", host);
150 /* Do a RPC UMNTALL for this specific mount */
151 for (pathlen = strlen(path);
152 pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
153 path[pathlen - 1] = '\0';
154 success = do_umount(host, path);
155 if (verbose && success)
156 warnx("umount RPC for %s:%s succeeded", host,
159 /* If successful, remove any corresponding mounttab entries. */
161 clean_mtab(host, path, verbose);
163 /* Write and unlink PATH_MOUNTTAB if necessary */
165 success = write_mtab(verbose);
167 exit (success ? 0 : 1);
171 * Send a RPC_MNT UMNTALL request to hostname.
172 * XXX This works for all mountd implementations,
173 * but produces a RPC IOERR on non FreeBSD systems.
176 do_umntall(char *hostname) {
177 enum clnt_stat clnt_stat;
179 struct sockaddr_in saddr;
180 struct timeval pertry, try;
184 if ((hp = gethostbyname_quick(hostname)) == NULL) {
185 warnx("gethostbyname(%s) failed", hostname);
188 memset(&saddr, 0, sizeof(saddr));
189 saddr.sin_family = AF_INET;
191 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length,
192 sizeof(saddr.sin_addr)));
196 pmap_getport_timeout(NULL, &pertry);
198 clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, pertry, &so);
200 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
203 clp->cl_auth = authunix_create_default();
206 clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0,
207 xdr_void, (caddr_t)0, try);
208 if (clnt_stat != RPC_SUCCESS)
209 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL"));
210 auth_destroy(clp->cl_auth);
212 return (clnt_stat == RPC_SUCCESS);
216 * Send a RPC_MNT UMOUNT request for dirp to hostname.
219 do_umount(char *hostname, char *dirp) {
220 enum clnt_stat clnt_stat;
222 struct sockaddr_in saddr;
223 struct timeval pertry, try;
227 if ((hp = gethostbyname_quick(hostname)) == NULL) {
228 warnx("gethostbyname(%s) failed", hostname);
231 memset(&saddr, 0, sizeof(saddr));
232 saddr.sin_family = AF_INET;
234 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length,
235 sizeof(saddr.sin_addr)));
239 pmap_getport_timeout(NULL, &pertry);
241 clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, pertry, &so);
243 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
246 clp->cl_auth = authunix_create_default();
249 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp,
250 xdr_void, (caddr_t)0, try);
251 if (clnt_stat != RPC_SUCCESS)
252 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT"));
253 auth_destroy(clp->cl_auth);
255 return (clnt_stat == RPC_SUCCESS);
259 * Check if the entry is still/already mounted.
262 is_mounted(char *hostname, char *dirp) {
263 struct statfs *mntbuf;
264 char name[MNAMELEN + 1];
268 if (strlen(hostname) + strlen(dirp) >= MNAMELEN)
270 snprintf(name, sizeof(name), "%s:%s", hostname, dirp);
271 mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
274 bufsize = (mntsize + 1) * sizeof(struct statfs);
275 if ((mntbuf = malloc(bufsize)) == NULL)
277 mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT);
278 for (i = mntsize - 1; i >= 0; i--) {
279 if (strcmp(mntbuf[i].f_mntfromname, name) == 0) {
289 * rpc.umntall is often called at boot. If the network or target host has
290 * issues we want to limit resolver stalls so rpc.umntall doesn't stall
291 * the boot sequence forever.
294 gethostbyname_quick(const char *name)
300 save_retrans = _res.retrans;
301 save_retry = _res.retry;
306 he = gethostbyname(name);
308 _res.retrans = save_retrans;
309 _res.retry = save_retry;
315 * xdr routines for mount rpc's
318 xdr_dir(XDR *xdrsp, char *dirp) {
319 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
324 (void)fprintf(stderr, "%s\n",
325 "usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]");