rpc.umntall.c revision 81070
153494Sdillon/* 253494Sdillon * Copyright (c) 1999 Martin Blapp 353494Sdillon * All rights reserved. 453494Sdillon * 553494Sdillon * Redistribution and use in source and binary forms, with or without 653494Sdillon * modification, are permitted provided that the following conditions 753494Sdillon * are met: 853494Sdillon * 1. Redistributions of source code must retain the above copyright 953494Sdillon * notice, this list of conditions and the following disclaimer. 1053494Sdillon * 2. Redistributions in binary form must reproduce the above copyright 1153494Sdillon * notice, this list of conditions and the following disclaimer in the 1253494Sdillon * documentation and/or other materials provided with the distribution. 1353494Sdillon * 1453494Sdillon * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1553494Sdillon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1653494Sdillon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1753494Sdillon * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1853494Sdillon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1953494Sdillon * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2053494Sdillon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2153494Sdillon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2253494Sdillon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2353494Sdillon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2453494Sdillon * SUCH DAMAGE. 2553494Sdillon * 2653494Sdillon */ 2753494Sdillon 2853494Sdillon#ifndef lint 2953494Sdillonstatic const char rcsid[] = 3053494Sdillon "$FreeBSD: head/usr.sbin/rpc.umntall/rpc.umntall.c 81070 2001-08-02 21:46:21Z iedowse $"; 3153494Sdillon#endif /* not lint */ 3253494Sdillon 3353494Sdillon#include <sys/param.h> 3453494Sdillon#include <sys/ucred.h> 3553494Sdillon#include <sys/mount.h> 3653494Sdillon 3753494Sdillon#include <rpc/rpc.h> 3853494Sdillon#include <nfs/rpcv2.h> 3953494Sdillon 4053494Sdillon#include <err.h> 4153494Sdillon#include <netdb.h> 4253494Sdillon#include <stdio.h> 4353494Sdillon#include <stdlib.h> 4453494Sdillon#include <string.h> 4553494Sdillon#include <unistd.h> 4653494Sdillon 4753494Sdillon#include "mounttab.h" 4853494Sdillon 4953494Sdillonint verbose; 5053494Sdillon 5153494Sdillonstatic int do_umount (char *, char *); 5253494Sdillonstatic int do_umntall (char *); 5353494Sdillonstatic int is_mounted (char *, char *); 5453494Sdillonstatic void usage (void); 5553494Sdillonint xdr_dir (XDR *, char *); 5653494Sdillon 5753494Sdillonint 5853494Sdillonmain(int argc, char **argv) { 5953494Sdillon int ch, keep, success, pathlen; 6080123Siedowse time_t expire, now; 6153494Sdillon char *host, *path; 6253494Sdillon struct mtablist *mtab; 6353494Sdillon 6453494Sdillon expire = 0; 6580123Siedowse host = path = NULL; 6653494Sdillon success = keep = verbose = 0; 6753494Sdillon while ((ch = getopt(argc, argv, "h:kp:ve:")) != -1) 6853494Sdillon switch (ch) { 6953494Sdillon case 'h': 7053494Sdillon host = optarg; 7153494Sdillon break; 7253494Sdillon case 'e': 7378343Sjlemon expire = atoi(optarg); 7453494Sdillon break; 7553494Sdillon case 'k': 7653494Sdillon keep = 1; 7753494Sdillon break; 7853494Sdillon case 'p': 7953494Sdillon path = optarg; 8053494Sdillon break; 8153494Sdillon case 'v': 8253494Sdillon verbose = 1; 8353494Sdillon break; 8453494Sdillon case '?': 8553494Sdillon usage(); 8653494Sdillon default: 8753494Sdillon } 8853494Sdillon argc -= optind; 8953494Sdillon argv += optind; 9053494Sdillon 9153494Sdillon /* Ignore SIGINT and SIGQUIT during shutdown */ 9253494Sdillon signal(SIGINT, SIG_IGN); 9353494Sdillon signal(SIGQUIT, SIG_IGN); 9453494Sdillon 9556038Sgreen /* Default expiretime is one day */ 9653494Sdillon if (expire == 0) 9756038Sgreen expire = 86400; 9880123Siedowse time(&now); 9980123Siedowse 10080123Siedowse /* Read PATH_MOUNTTAB. */ 10180146Siedowse if (!read_mtab()) { 10280123Siedowse if (verbose) 10380123Siedowse warnx("no mounttab entries (%s does not exist)", 10480123Siedowse PATH_MOUNTTAB); 10580123Siedowse mtabhead = NULL; 10680123Siedowse } 10780123Siedowse 10853494Sdillon if (host == NULL && path == NULL) { 10980123Siedowse /* Check each entry and do any necessary unmount RPCs. */ 11053494Sdillon for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) { 11180123Siedowse if (*mtab->mtab_host == '\0') 11280123Siedowse continue; 11380123Siedowse if (mtab->mtab_time + expire < now) { 11480123Siedowse /* Clear expired entry. */ 11580123Siedowse if (verbose) 11680123Siedowse warnx("remove expired entry %s:%s", 11780123Siedowse mtab->mtab_host, mtab->mtab_dirp); 11880123Siedowse bzero(mtab->mtab_host, 11980123Siedowse sizeof(mtab->mtab_host)); 12080123Siedowse continue; 12153494Sdillon } 12280123Siedowse if (keep && is_mounted(mtab->mtab_host, 12380123Siedowse mtab->mtab_dirp)) { 12480123Siedowse if (verbose) 12580123Siedowse warnx("skip entry %s:%s", 12680123Siedowse mtab->mtab_host, mtab->mtab_dirp); 12780123Siedowse continue; 12880123Siedowse } 12980123Siedowse if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) { 13080123Siedowse if (verbose) 13180123Siedowse warnx("umount RPC for %s:%s succeeded", 13280123Siedowse mtab->mtab_host, mtab->mtab_dirp); 13380123Siedowse /* Remove all entries for this host + path. */ 13480146Siedowse clean_mtab(mtab->mtab_host, mtab->mtab_dirp, 13580146Siedowse verbose); 13680123Siedowse } 13753494Sdillon } 13880123Siedowse success = 1; 13980123Siedowse } else { 14080123Siedowse if (host == NULL && path != NULL) 14180123Siedowse /* Missing hostname. */ 14280123Siedowse usage(); 14380123Siedowse if (path == NULL) { 14480123Siedowse /* Do a RPC UMNTALL for this specific host */ 14580123Siedowse success = do_umntall(host); 14680123Siedowse if (verbose && success) 14780123Siedowse warnx("umntall RPC for %s succeeded", host); 14880123Siedowse } else { 14980123Siedowse /* Do a RPC UMNTALL for this specific mount */ 15080123Siedowse for (pathlen = strlen(path); 15180123Siedowse pathlen > 1 && path[pathlen - 1] == '/'; pathlen--) 15280123Siedowse path[pathlen - 1] = '\0'; 15380123Siedowse success = do_umount(host, path); 15480123Siedowse if (verbose && success) 15580123Siedowse warnx("umount RPC for %s:%s succeeded", host, 15680123Siedowse path); 15780123Siedowse } 15880123Siedowse /* If successful, remove any corresponding mounttab entries. */ 15980123Siedowse if (success) 16080146Siedowse clean_mtab(host, path, verbose); 16153494Sdillon } 16253494Sdillon /* Write and unlink PATH_MOUNTTAB if necessary */ 16380123Siedowse if (success) 16480146Siedowse success = write_mtab(verbose); 16553494Sdillon free_mtab(); 16680123Siedowse exit (success ? 0 : 1); 16753494Sdillon} 16853494Sdillon 16953494Sdillon/* 17053494Sdillon * Send a RPC_MNT UMNTALL request to hostname. 17154341Sgrog * XXX This works for all mountd implementations, 17254341Sgrog * but produces a RPC IOERR on non FreeBSD systems. 17353494Sdillon */ 17453494Sdillonint 17553494Sdillondo_umntall(char *hostname) { 17653494Sdillon enum clnt_stat clnt_stat; 17774462Salfred struct timeval try; 17853494Sdillon CLIENT *clp; 17953494Sdillon 18074462Salfred clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp"); 18180123Siedowse if (clp == NULL) { 18280123Siedowse warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT")); 18381070Siedowse return (0); 18453494Sdillon } 18553494Sdillon clp->cl_auth = authunix_create_default(); 18653494Sdillon try.tv_sec = 3; 18753494Sdillon try.tv_usec = 0; 18853494Sdillon clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0, 18953494Sdillon xdr_void, (caddr_t)0, try); 19081070Siedowse if (clnt_stat != RPC_SUCCESS) 19181070Siedowse warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL")); 19281070Siedowse auth_destroy(clp->cl_auth); 19380123Siedowse clnt_destroy(clp); 19481070Siedowse return (clnt_stat == RPC_SUCCESS); 19553494Sdillon} 19653494Sdillon 19753494Sdillon/* 19853494Sdillon * Send a RPC_MNT UMOUNT request for dirp to hostname. 19953494Sdillon */ 20053494Sdillonint 20153494Sdillondo_umount(char *hostname, char *dirp) { 20253494Sdillon enum clnt_stat clnt_stat; 20374462Salfred struct timeval try; 20453494Sdillon CLIENT *clp; 20553494Sdillon 20674462Salfred clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp"); 20774462Salfred if (clp == NULL) { 20880123Siedowse warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT")); 20981070Siedowse return (0); 21053494Sdillon } 21174462Salfred clp->cl_auth = authsys_create_default(); 21253494Sdillon try.tv_sec = 3; 21353494Sdillon try.tv_usec = 0; 21453494Sdillon clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp, 21553494Sdillon xdr_void, (caddr_t)0, try); 21681070Siedowse if (clnt_stat != RPC_SUCCESS) 21781070Siedowse warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT")); 21881070Siedowse auth_destroy(clp->cl_auth); 21980123Siedowse clnt_destroy(clp); 22081070Siedowse return (clnt_stat == RPC_SUCCESS); 22153494Sdillon} 22253494Sdillon 22353494Sdillon/* 22453494Sdillon * Check if the entry is still/already mounted. 22553494Sdillon */ 22653494Sdillonint 22753494Sdillonis_mounted(char *hostname, char *dirp) { 22853494Sdillon struct statfs *mntbuf; 22953494Sdillon char name[MNAMELEN + 1]; 23080123Siedowse size_t bufsize; 23153494Sdillon int mntsize, i; 23253494Sdillon 23380123Siedowse if (strlen(hostname) + strlen(dirp) >= MNAMELEN) 23453494Sdillon return (0); 23580123Siedowse snprintf(name, sizeof(name), "%s:%s", hostname, dirp); 23653494Sdillon mntsize = getfsstat(NULL, 0, MNT_NOWAIT); 23753494Sdillon if (mntsize <= 0) 23853494Sdillon return (0); 23953494Sdillon bufsize = (mntsize + 1) * sizeof(struct statfs); 24053494Sdillon if ((mntbuf = malloc(bufsize)) == NULL) 24153494Sdillon err(1, "malloc"); 24253494Sdillon mntsize = getfsstat(mntbuf, (long)bufsize, MNT_NOWAIT); 24353494Sdillon for (i = mntsize - 1; i >= 0; i--) { 24453494Sdillon if (strcmp(mntbuf[i].f_mntfromname, name) == 0) { 24553494Sdillon free(mntbuf); 24653494Sdillon return (1); 24753494Sdillon } 24853494Sdillon } 24953494Sdillon free(mntbuf); 25053494Sdillon return (0); 25153494Sdillon} 25253494Sdillon 25353494Sdillon/* 25453494Sdillon * xdr routines for mount rpc's 25553494Sdillon */ 25653494Sdillonint 25753494Sdillonxdr_dir(XDR *xdrsp, char *dirp) { 25853494Sdillon return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 25953494Sdillon} 26053494Sdillon 26153494Sdillonstatic void 26253494Sdillonusage() { 26353494Sdillon (void)fprintf(stderr, "%s\n", 26480123Siedowse "usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]"); 26553494Sdillon exit(1); 26653494Sdillon} 267