FreeBSD-5.3/usr.sbin/rpc.umntall/rpc.umntall.c
/*
* Copyright (c) 1999 Martin Blapp
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD: src/usr.sbin/rpc.umntall/rpc.umntall.c,v 1.12 2003/10/26 06:14:10 peter Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#include <rpc/rpc.h>
#include <nfs/rpcv2.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mounttab.h"
int verbose;
static int do_umount (char *, char *);
static int do_umntall (char *);
static int is_mounted (char *, char *);
static void usage (void);
int xdr_dir (XDR *, char *);
int
main(int argc, char **argv) {
int ch, keep, success, pathlen;
time_t expire, now;
char *host, *path;
struct mtablist *mtab;
expire = 0;
host = path = NULL;
success = keep = verbose = 0;
while ((ch = getopt(argc, argv, "h:kp:ve:")) != -1)
switch (ch) {
case 'h':
host = optarg;
break;
case 'e':
expire = atoi(optarg);
break;
case 'k':
keep = 1;
break;
case 'p':
path = optarg;
break;
case 'v':
verbose = 1;
break;
case '?':
usage();
default:
break;
}
argc -= optind;
argv += optind;
/* Default expiretime is one day */
if (expire == 0)
expire = 86400;
time(&now);
/* Read PATH_MOUNTTAB. */
if (!read_mtab()) {
if (verbose)
warnx("no mounttab entries (%s does not exist)",
PATH_MOUNTTAB);
mtabhead = NULL;
}
if (host == NULL && path == NULL) {
/* Check each entry and do any necessary unmount RPCs. */
for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) {
if (*mtab->mtab_host == '\0')
continue;
if (mtab->mtab_time + expire < now) {
/* Clear expired entry. */
if (verbose)
warnx("remove expired entry %s:%s",
mtab->mtab_host, mtab->mtab_dirp);
bzero(mtab->mtab_host,
sizeof(mtab->mtab_host));
continue;
}
if (keep && is_mounted(mtab->mtab_host,
mtab->mtab_dirp)) {
if (verbose)
warnx("skip entry %s:%s",
mtab->mtab_host, mtab->mtab_dirp);
continue;
}
if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) {
if (verbose)
warnx("umount RPC for %s:%s succeeded",
mtab->mtab_host, mtab->mtab_dirp);
/* Remove all entries for this host + path. */
clean_mtab(mtab->mtab_host, mtab->mtab_dirp,
verbose);
}
}
success = 1;
} else {
if (host == NULL && path != NULL)
/* Missing hostname. */
usage();
if (path == NULL) {
/* Do a RPC UMNTALL for this specific host */
success = do_umntall(host);
if (verbose && success)
warnx("umntall RPC for %s succeeded", host);
} else {
/* Do a RPC UMNTALL for this specific mount */
for (pathlen = strlen(path);
pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
path[pathlen - 1] = '\0';
success = do_umount(host, path);
if (verbose && success)
warnx("umount RPC for %s:%s succeeded", host,
path);
}
/* If successful, remove any corresponding mounttab entries. */
if (success)
clean_mtab(host, path, verbose);
}
/* Write and unlink PATH_MOUNTTAB if necessary */
if (success)
success = write_mtab(verbose);
free_mtab();
exit (success ? 0 : 1);
}
/*
* Send a RPC_MNT UMNTALL request to hostname.
* XXX This works for all mountd implementations,
* but produces a RPC IOERR on non FreeBSD systems.
*/
int
do_umntall(char *hostname) {
enum clnt_stat clnt_stat;
struct timeval try;
CLIENT *clp;
clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp");
if (clp == NULL) {
warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
return (0);
}
clp->cl_auth = authunix_create_default();
try.tv_sec = 3;
try.tv_usec = 0;
clnt_stat = clnt_call(clp, RPCMNT_UMNTALL,
(xdrproc_t)xdr_void, (caddr_t)0,
(xdrproc_t)xdr_void, (caddr_t)0, try);
if (clnt_stat != RPC_SUCCESS)
warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL"));
auth_destroy(clp->cl_auth);
clnt_destroy(clp);
return (clnt_stat == RPC_SUCCESS);
}
/*
* Send a RPC_MNT UMOUNT request for dirp to hostname.
*/
int
do_umount(char *hostname, char *dirp) {
enum clnt_stat clnt_stat;
struct timeval try;
CLIENT *clp;
clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp");
if (clp == NULL) {
warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
return (0);
}
clp->cl_auth = authsys_create_default();
try.tv_sec = 3;
try.tv_usec = 0;
clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, (xdrproc_t)xdr_dir, dirp,
(xdrproc_t)xdr_void, (caddr_t)0, try);
if (clnt_stat != RPC_SUCCESS)
warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT"));
auth_destroy(clp->cl_auth);
clnt_destroy(clp);
return (clnt_stat == RPC_SUCCESS);
}
/*
* Check if the entry is still/already mounted.
*/
int
is_mounted(char *hostname, char *dirp) {
struct statfs *mntbuf;
char name[MNAMELEN + 1];
size_t bufsize;
int mntsize, i;
if (strlen(hostname) + strlen(dirp) >= MNAMELEN)
return (0);
snprintf(name, sizeof(name), "%s:%s", hostname, dirp);
mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
if (mntsize <= 0)
return (0);
bufsize = (mntsize + 1) * sizeof(struct statfs);
if ((mntbuf = malloc(bufsize)) == NULL)
err(1, "malloc");
mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT);
for (i = mntsize - 1; i >= 0; i--) {
if (strcmp(mntbuf[i].f_mntfromname, name) == 0) {
free(mntbuf);
return (1);
}
}
free(mntbuf);
return (0);
}
/*
* xdr routines for mount rpc's
*/
int
xdr_dir(XDR *xdrsp, char *dirp) {
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
static void
usage() {
(void)fprintf(stderr, "%s\n",
"usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]");
exit(1);
}