422 lines
9.7 KiB
C
422 lines
9.7 KiB
C
/*-
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* Copyright (c) 1980, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1980, 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)umount.c 8.3 (Berkeley) 2/20/94";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <netdb.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_prot.h>
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#include <nfs/rpcv2.h>
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#include <err.h>
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#include <fstab.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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typedef enum { MNTON, MNTFROM } mntwhat;
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int fake, fflag, vflag, *typelist;
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char *nfshost;
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int fsnametotype __P((char *));
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char *getmntname __P((char *, mntwhat, int *));
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void maketypelist __P((char *));
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int selected __P((int));
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int namematch __P((struct hostent *));
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int umountall __P((void));
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int umountfs __P((char *));
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void usage __P((void));
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int xdr_dir __P((XDR *, char *));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int all, ch, errs;
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/* Start disks transferring immediately. */
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sync();
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all = 0;
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while ((ch = getopt(argc, argv, "aFfh:t:v")) != EOF)
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switch (ch) {
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case 'a':
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all = 1;
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break;
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case 'F':
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fake = 1;
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break;
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case 'f':
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fflag = MNT_FORCE;
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break;
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case 'h': /* -h implies -a. */
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all = 1;
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nfshost = optarg;
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break;
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case 't':
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maketypelist(optarg);
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break;
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case 'v':
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vflag = 1;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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if (argc == 0 && !all || argc != 0 && all)
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usage();
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/* -h implies "-t nfs" if no -t flag. */
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if ((nfshost != NULL) && (typelist == NULL))
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maketypelist("nfs");
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if (all) {
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if (setfsent() == 0)
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err(1, "%s", _PATH_FSTAB);
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errs = umountall();
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} else
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for (errs = 0; *argv != NULL; ++argv)
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if (umountfs(*argv) == 0)
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errs = 1;
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exit(errs);
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}
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int
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umountall()
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{
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struct fstab *fs;
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int rval, type;
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char *cp;
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while ((fs = getfsent()) != NULL) {
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/* Ignore the root. */
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if (strcmp(fs->fs_file, "/") == 0)
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continue;
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/*
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* !!!
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* Historic practice: ignore unknown FSTAB_* fields.
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*/
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if (strcmp(fs->fs_type, FSTAB_RW) &&
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strcmp(fs->fs_type, FSTAB_RO) &&
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strcmp(fs->fs_type, FSTAB_RQ))
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continue;
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/* If an unknown file system type, complain. */
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if ((type = fsnametotype(fs->fs_vfstype)) == MOUNT_NONE) {
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warnx("%s: unknown mount type", fs->fs_vfstype);
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continue;
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}
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if (!selected(type))
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continue;
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/*
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* We want to unmount the file systems in the reverse order
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* that they were mounted. So, we save off the file name
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* in some allocated memory, and then call recursively.
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*/
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if ((cp = malloc((size_t)strlen(fs->fs_file) + 1)) == NULL)
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err(1, NULL);
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(void)strcpy(cp, fs->fs_file);
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rval = umountall();
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return (umountfs(cp) || rval);
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}
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return (0);
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}
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int
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umountfs(name)
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char *name;
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{
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enum clnt_stat clnt_stat;
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struct hostent *hp;
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struct sockaddr_in saddr;
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struct stat sb;
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struct timeval pertry, try;
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CLIENT *clp;
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int so, type;
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char *delimp, *hostp, *mntpt, rname[MAXPATHLEN];
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if (realpath(name, rname) == NULL) {
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warn("%s", rname);
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return (0);
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}
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name = rname;
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if (stat(name, &sb) < 0) {
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if (((mntpt = getmntname(name, MNTFROM, &type)) == NULL) &&
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((mntpt = getmntname(name, MNTON, &type)) == NULL)) {
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warnx("%s: not currently mounted", name);
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return (1);
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}
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} else if (S_ISBLK(sb.st_mode)) {
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if ((mntpt = getmntname(name, MNTON, &type)) == NULL) {
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warnx("%s: not currently mounted", name);
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return (1);
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}
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} else if (S_ISDIR(sb.st_mode)) {
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mntpt = name;
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if ((name = getmntname(mntpt, MNTFROM, &type)) == NULL) {
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warnx("%s: not currently mounted", mntpt);
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return (1);
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}
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} else {
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warnx("%s: not a directory or special device", name);
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return (1);
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}
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if (!selected(type))
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return (0);
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if ((delimp = strchr(name, '@')) != NULL) {
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hostp = delimp + 1;
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*delimp = '\0';
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hp = gethostbyname(hostp);
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*delimp = '@';
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} else if ((delimp = strchr(name, ':')) != NULL) {
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*delimp = '\0';
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hostp = name;
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hp = gethostbyname(hostp);
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name = delimp + 1;
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*delimp = ':';
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} else
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hp = NULL;
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if (!namematch(hp))
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return (0);
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if (vflag)
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(void)printf("%s: unmount from %s\n", name, mntpt);
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if (fake)
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return (0);
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if (unmount(mntpt, fflag) < 0) {
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warn("%s", mntpt);
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return (1);
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}
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if ((hp != NULL) && !(fflag & MNT_FORCE)) {
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*delimp = '\0';
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memset(&saddr, 0, sizeof(saddr));
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saddr.sin_family = AF_INET;
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saddr.sin_port = 0;
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memmove(&saddr.sin_addr, hp->h_addr, hp->h_length);
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pertry.tv_sec = 3;
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pertry.tv_usec = 0;
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so = RPC_ANYSOCK;
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if ((clp = clntudp_create(&saddr,
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RPCPROG_MNT, RPCMNT_VER1, pertry, &so)) == NULL) {
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clnt_pcreateerror("Cannot MNT PRC");
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return (1);
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}
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clp->cl_auth = authunix_create_default();
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try.tv_sec = 20;
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try.tv_usec = 0;
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clnt_stat = clnt_call(clp,
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RPCMNT_UMOUNT, xdr_dir, name, xdr_void, (caddr_t)0, try);
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if (clnt_stat != RPC_SUCCESS) {
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clnt_perror(clp, "Bad MNT RPC");
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return (1);
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}
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auth_destroy(clp->cl_auth);
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clnt_destroy(clp);
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}
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return (0);
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}
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char *
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getmntname(name, what, type)
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char *name;
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mntwhat what;
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int *type;
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{
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struct statfs *mntbuf;
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int i, mntsize;
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if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
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warn("getmntinfo");
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return (NULL);
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}
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for (i = 0; i < mntsize; i++) {
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if ((what == MNTON) && !strcmp(mntbuf[i].f_mntfromname, name)) {
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if (type)
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*type = mntbuf[i].f_type;
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return (mntbuf[i].f_mntonname);
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}
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if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) {
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if (type)
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*type = mntbuf[i].f_type;
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return (mntbuf[i].f_mntfromname);
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}
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}
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return (NULL);
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}
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static enum { IN_LIST, NOT_IN_LIST } which;
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int
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selected(type)
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int type;
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{
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/* If no type specified, it's always selected. */
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if (typelist == NULL)
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return (1);
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for (; *typelist != MOUNT_NONE; ++typelist)
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if (type == *typelist)
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return (which == IN_LIST ? 1 : 0);
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return (which == IN_LIST ? 0 : 1);
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}
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void
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maketypelist(fslist)
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char *fslist;
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{
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int *av, i;
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char *nextcp;
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if ((fslist == NULL) || (fslist[0] == '\0'))
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errx(1, "empty type list");
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/*
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* XXX
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* Note: the syntax is "noxxx,yyy" for no xxx's and
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* no yyy's, not the more intuitive "noyyy,noyyy".
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*/
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if (fslist[0] == 'n' && fslist[1] == 'o') {
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fslist += 2;
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which = NOT_IN_LIST;
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} else
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which = IN_LIST;
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/* Count the number of types. */
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for (i = 0, nextcp = fslist; *nextcp != NULL; ++nextcp)
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if (*nextcp == ',')
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i++;
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/* Build an array of that many types. */
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if ((av = typelist = malloc((i + 2) * sizeof(int))) == NULL)
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err(1, NULL);
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for (i = 0; fslist != NULL; fslist = nextcp, ++i) {
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if ((nextcp = strchr(fslist, ',')) != NULL)
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*nextcp++ = '\0';
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av[i] = fsnametotype(fslist);
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if (av[i] == MOUNT_NONE)
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errx(1, "%s: unknown mount type", fslist);
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}
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/* Terminate the array. */
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av[i++] = MOUNT_NONE;
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}
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int
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fsnametotype(name)
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char *name;
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{
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static char const *namelist[] = INITMOUNTNAMES;
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char const **cp;
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for (cp = namelist; *cp; ++cp)
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if (strcmp(name, *cp) == 0)
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return (cp - namelist);
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return (MOUNT_NONE);
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}
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int
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namematch(hp)
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struct hostent *hp;
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{
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char *cp, **np;
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if ((hp == NULL) || (nfshost == NULL))
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return (1);
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if (strcasecmp(nfshost, hp->h_name) == 0)
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return (1);
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if ((cp = strchr(hp->h_name, '.')) != NULL) {
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*cp = '\0';
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if (strcasecmp(nfshost, hp->h_name) == 0)
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return (1);
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}
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for (np = hp->h_aliases; *np; np++) {
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if (strcasecmp(nfshost, *np) == 0)
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return (1);
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if ((cp = strchr(*np, '.')) != NULL) {
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*cp = '\0';
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if (strcasecmp(nfshost, *np) == 0)
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return (1);
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}
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}
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return (0);
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}
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/*
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* xdr routines for mount rpc's
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*/
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int
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xdr_dir(xdrsp, dirp)
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XDR *xdrsp;
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char *dirp;
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{
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return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: %s\n %s\n",
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"umount [-fv] [-t fstypelist] special | node",
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"umount -a[fv] [-h host] [-t fstypelist]");
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exit(1);
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}
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