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 1.3 2003/11/09 07:11:02 dillon 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);
95 /* Default expiretime is one day */
100 /* Read PATH_MOUNTTAB. */
103 warnx("no mounttab entries (%s does not exist)",
108 if (host == NULL && path == NULL) {
109 /* Check each entry and do any necessary unmount RPCs. */
110 for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) {
111 if (*mtab->mtab_host == '\0')
113 if (mtab->mtab_time + expire < now) {
114 /* Clear expired entry. */
116 warnx("remove expired entry %s:%s",
117 mtab->mtab_host, mtab->mtab_dirp);
118 bzero(mtab->mtab_host,
119 sizeof(mtab->mtab_host));
122 if (keep && is_mounted(mtab->mtab_host,
125 warnx("skip entry %s:%s",
126 mtab->mtab_host, mtab->mtab_dirp);
129 if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) {
131 warnx("umount RPC for %s:%s succeeded",
132 mtab->mtab_host, mtab->mtab_dirp);
133 /* Remove all entries for this host + path. */
134 clean_mtab(mtab->mtab_host, mtab->mtab_dirp,
140 if (host == NULL && path != NULL)
141 /* Missing hostname. */
144 /* Do a RPC UMNTALL for this specific host */
145 success = do_umntall(host);
146 if (verbose && success)
147 warnx("umntall RPC for %s succeeded", host);
149 /* Do a RPC UMNTALL for this specific mount */
150 for (pathlen = strlen(path);
151 pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
152 path[pathlen - 1] = '\0';
153 success = do_umount(host, path);
154 if (verbose && success)
155 warnx("umount RPC for %s:%s succeeded", host,
158 /* If successful, remove any corresponding mounttab entries. */
160 clean_mtab(host, path, verbose);
162 /* Write and unlink PATH_MOUNTTAB if necessary */
164 success = write_mtab(verbose);
166 exit (success ? 0 : 1);
170 * Send a RPC_MNT UMNTALL request to hostname.
171 * XXX This works for all mountd implementations,
172 * but produces a RPC IOERR on non FreeBSD systems.
175 do_umntall(char *hostname) {
176 enum clnt_stat clnt_stat;
178 struct sockaddr_in saddr;
179 struct timeval pertry, try;
183 if ((hp = gethostbyname_quick(hostname)) == NULL) {
184 warnx("gethostbyname(%s) failed", hostname);
187 memset(&saddr, 0, sizeof(saddr));
188 saddr.sin_family = AF_INET;
190 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length,
191 sizeof(saddr.sin_addr)));
195 pmap_getport_timeout(NULL, &pertry);
197 clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, pertry, &so);
199 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
202 clp->cl_auth = authunix_create_default();
205 clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0,
206 xdr_void, (caddr_t)0, try);
207 if (clnt_stat != RPC_SUCCESS)
208 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL"));
209 auth_destroy(clp->cl_auth);
211 return (clnt_stat == RPC_SUCCESS);
215 * Send a RPC_MNT UMOUNT request for dirp to hostname.
218 do_umount(char *hostname, char *dirp) {
219 enum clnt_stat clnt_stat;
221 struct sockaddr_in saddr;
222 struct timeval pertry, try;
226 if ((hp = gethostbyname_quick(hostname)) == NULL) {
227 warnx("gethostbyname(%s) failed", hostname);
230 memset(&saddr, 0, sizeof(saddr));
231 saddr.sin_family = AF_INET;
233 memmove(&saddr.sin_addr, hp->h_addr, MIN(hp->h_length,
234 sizeof(saddr.sin_addr)));
238 pmap_getport_timeout(NULL, &pertry);
240 clp = clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, pertry, &so);
242 warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
245 clp->cl_auth = authunix_create_default();
248 clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp,
249 xdr_void, (caddr_t)0, try);
250 if (clnt_stat != RPC_SUCCESS)
251 warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT"));
252 auth_destroy(clp->cl_auth);
254 return (clnt_stat == RPC_SUCCESS);
258 * Check if the entry is still/already mounted.
261 is_mounted(char *hostname, char *dirp) {
262 struct statfs *mntbuf;
263 char name[MNAMELEN + 1];
267 if (strlen(hostname) + strlen(dirp) >= MNAMELEN)
269 snprintf(name, sizeof(name), "%s:%s", hostname, dirp);
270 mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
273 bufsize = (mntsize + 1) * sizeof(struct statfs);
274 if ((mntbuf = malloc(bufsize)) == NULL)
276 mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT);
277 for (i = mntsize - 1; i >= 0; i--) {
278 if (strcmp(mntbuf[i].f_mntfromname, name) == 0) {
288 * rpc.umntall is often called at boot. If the network or target host has
289 * issues we want to limit resolver stalls so rpc.umntall doesn't stall
290 * the boot sequence forever.
293 gethostbyname_quick(const char *name)
299 save_retrans = _res.retrans;
300 save_retry = _res.retry;
305 he = gethostbyname(name);
307 _res.retrans = save_retrans;
308 _res.retry = save_retry;
314 * xdr routines for mount rpc's
317 xdr_dir(XDR *xdrsp, char *dirp) {
318 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
323 (void)fprintf(stderr, "%s\n",
324 "usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]");