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 1.6 2005/04/02 20:49:56 joerg Exp $
30 #include <sys/param.h>
31 #include <sys/ucred.h>
32 #include <sys/mount.h>
35 #include <rpc/pmap_clnt.h>
36 #include <nfs/rpcv2.h>
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 static struct hostent *gethostbyname_quick(const char *name);
57 int xdr_dir (XDR *, char *);
60 main(int argc, char **argv) {
61 int ch, keep, success, pathlen;
64 struct mtablist *mtab;
68 success = keep = verbose = 0;
69 while ((ch = getopt(argc, argv, "h:kp:vfe:")) != -1)
75 expire = atoi(optarg);
97 /* Default expiretime is one day */
102 /* Read PATH_MOUNTTAB. */
105 warnx("no mounttab entries (%s does not exist)",
110 if (host == NULL && path == NULL) {
111 /* Check each entry and do any necessary unmount RPCs. */
112 for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) {
113 if (*mtab->mtab_host == '\0')
115 if (mtab->mtab_time + expire < now) {
116 /* Clear expired entry. */
118 warnx("remove expired entry %s:%s",
119 mtab->mtab_host, mtab->mtab_dirp);
120 bzero(mtab->mtab_host,
121 sizeof(mtab->mtab_host));
124 if (keep && is_mounted(mtab->mtab_host,
127 warnx("skip entry %s:%s",
128 mtab->mtab_host, mtab->mtab_dirp);
131 if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) {
133 warnx("umount RPC for %s:%s succeeded",
134 mtab->mtab_host, mtab->mtab_dirp);
135 /* Remove all entries for this host + path. */
136 clean_mtab(mtab->mtab_host, mtab->mtab_dirp,
142 if (host == NULL && path != NULL)
143 /* Missing hostname. */
146 /* Do a RPC UMNTALL for this specific host */
147 success = do_umntall(host);
148 if (verbose && success)
149 warnx("umntall RPC for %s succeeded", host);
151 /* Do a RPC UMNTALL for this specific mount */
152 for (pathlen = strlen(path);
153 pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
154 path[pathlen - 1] = '\0';
155 success = do_umount(host, path);
156 if (verbose && success)
157 warnx("umount RPC for %s:%s succeeded", host,
160 /* If successful, remove any corresponding mounttab entries. */
162 clean_mtab(host, path, verbose);
164 /* Write and unlink PATH_MOUNTTAB if necessary */
166 success = write_mtab(verbose);
168 exit (success ? 0 : 1);
172 * Send a RPC_MNT UMNTALL request to hostname.
173 * XXX This works for all mountd implementations,
174 * but produces a RPC IOERR on non FreeBSD systems.
177 do_umntall(char *hostname) {
178 enum clnt_stat clnt_stat;
180 struct sockaddr_in saddr;
181 struct timeval pertry, try;
185 if ((hp = gethostbyname_quick(hostname)) == NULL) {
186 warnx("gethostbyname(%s) failed", hostname);
189 memset(&saddr, 0, sizeof(saddr));
190 saddr.sin_family = AF_INET;
192 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length,
193 (int)sizeof(saddr.sin_addr)));
197 pmap_getport_timeout(NULL, &pertry);
199 clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, pertry, &so);
201 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
204 clp->cl_auth = authunix_create_default();
207 clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0,
208 xdr_void, (caddr_t)0, try);
209 if (clnt_stat != RPC_SUCCESS)
210 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL"));
211 auth_destroy(clp->cl_auth);
213 return (clnt_stat == RPC_SUCCESS);
217 * Send a RPC_MNT UMOUNT request for dirp to hostname.
220 do_umount(char *hostname, char *dirp) {
221 enum clnt_stat clnt_stat;
223 struct sockaddr_in saddr;
224 struct timeval pertry, try;
228 if ((hp = gethostbyname_quick(hostname)) == NULL) {
229 warnx("gethostbyname(%s) failed", hostname);
232 memset(&saddr, 0, sizeof(saddr));
233 saddr.sin_family = AF_INET;
235 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length,
236 (int)sizeof(saddr.sin_addr)));
240 pmap_getport_timeout(NULL, &pertry);
242 clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, pertry, &so);
244 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
247 clp->cl_auth = authunix_create_default();
250 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp,
251 xdr_void, (caddr_t)0, try);
252 if (clnt_stat != RPC_SUCCESS)
253 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT"));
254 auth_destroy(clp->cl_auth);
256 return (clnt_stat == RPC_SUCCESS);
260 * Check if the entry is still/already mounted.
263 is_mounted(char *hostname, char *dirp) {
264 struct statfs *mntbuf;
265 char name[MNAMELEN + 1];
269 if (strlen(hostname) + strlen(dirp) >= MNAMELEN)
271 snprintf(name, sizeof(name), "%s:%s", hostname, dirp);
272 mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
275 bufsize = (mntsize + 1) * sizeof(struct statfs);
276 if ((mntbuf = malloc(bufsize)) == NULL)
278 mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT);
279 for (i = mntsize - 1; i >= 0; i--) {
280 if (strcmp(mntbuf[i].f_mntfromname, name) == 0) {
290 * rpc.umntall is often called at boot. If the network or target host has
291 * issues we want to limit resolver stalls so rpc.umntall doesn't stall
292 * the boot sequence forever.
295 gethostbyname_quick(const char *name)
301 save_retrans = _res.retrans;
302 save_retry = _res.retry;
307 he = gethostbyname(name);
309 _res.retrans = save_retrans;
310 _res.retry = save_retry;
316 * xdr routines for mount rpc's
319 xdr_dir(XDR *xdrsp, char *dirp) {
320 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
325 fprintf(stderr, "%s\n",
326 "usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]");