400 lines
9.0 KiB
C
400 lines
9.0 KiB
C
/* $NetBSD: umount.c,v 1.34 2004/04/21 15:20:40 christos Exp $ */
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/*-
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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. 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) 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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#if 0
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static char sccsid[] = "@(#)umount.c 8.8 (Berkeley) 5/8/95";
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#else
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__RCSID("$NetBSD: umount.c,v 1.34 2004/04/21 15:20:40 christos Exp $");
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#endif
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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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#ifndef SMALL
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#include <sys/socket.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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#endif /* !SMALL */
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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 { MNTANY, MNTON, MNTFROM } mntwhat;
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#ifndef SMALL
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#include "vfslist.h"
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static int fake, verbose;
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static char *nfshost;
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static struct addrinfo *nfshost_ai = NULL;
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static int namematch(const struct addrinfo *);
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static int sacmp(const struct sockaddr *, const struct sockaddr *);
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static int xdr_dir(XDR *, char *);
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#endif /* !SMALL */
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static int fflag, raw;
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static char *getmntname(const char *, mntwhat, char **);
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static int umountfs(const char *, const char **);
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static void usage(void) __attribute__((__noreturn__));
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int main(int, char *[]);
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int
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main(int argc, char *argv[])
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{
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int ch, errs, all = 0;
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#ifndef SMALL
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int mnts;
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struct statvfs *mntbuf;
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struct addrinfo hints;
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#endif /* SMALL */
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const char **typelist = NULL;
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/* Start disks transferring immediately. */
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sync();
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#ifdef SMALL
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#define OPTS "fr"
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#else
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#define OPTS "AaFfh:Rt:v"
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#endif
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while ((ch = getopt(argc, argv, OPTS)) != -1)
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switch (ch) {
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case 'f':
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fflag = MNT_FORCE;
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break;
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case 'R':
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raw = 1;
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break;
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#ifndef SMALL
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case 'A':
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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 '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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if (typelist != NULL)
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errx(1, "only one -t option may be specified.");
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typelist = makevfslist(optarg);
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break;
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case 'v':
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verbose = 1;
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break;
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#endif /* !SMALL */
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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) || (all && raw))
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usage();
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#ifndef SMALL
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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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typelist = makevfslist("nfs");
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if (nfshost != NULL) {
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memset(&hints, 0, sizeof hints);
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getaddrinfo(nfshost, NULL, &hints, &nfshost_ai);
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}
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errs = 0;
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if (all) {
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if ((mnts = getmntinfo(&mntbuf, ST_NOWAIT)) == 0) {
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warn("getmntinfo");
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errs = 1;
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}
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for (errs = 0, mnts--; mnts > 0; mnts--) {
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if (checkvfsname(mntbuf[mnts].f_fstypename, typelist))
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continue;
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if (umountfs(mntbuf[mnts].f_mntonname, typelist) != 0)
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errs = 1;
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}
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} else
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#endif /* !SMALL */
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for (errs = 0; *argv != NULL; ++argv)
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if (umountfs(*argv, typelist) != 0)
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errs = 1;
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return errs;
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}
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static int
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umountfs(const char *name, const char **typelist)
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{
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#ifndef SMALL
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enum clnt_stat clnt_stat;
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struct timeval try;
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CLIENT *clp;
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char *hostp = NULL;
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struct addrinfo *ai = NULL, hints;
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#endif /* !SMALL */
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const char *mntpt;
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char *type, rname[MAXPATHLEN];
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mntwhat what;
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struct stat sb;
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if (raw) {
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mntpt = name;
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} else {
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what = MNTANY;
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if (realpath(name, rname) != NULL) {
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name = rname;
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if (stat(name, &sb) == 0) {
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if (S_ISBLK(sb.st_mode))
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what = MNTON;
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else if (S_ISDIR(sb.st_mode))
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what = MNTFROM;
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}
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}
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#ifdef SMALL
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else {
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warn("%s", rname);
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return 1;
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}
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#endif /* SMALL */
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mntpt = name;
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switch (what) {
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case MNTON:
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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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break;
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case MNTFROM:
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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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break;
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default:
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if ((name = getmntname(mntpt, MNTFROM, &type)) == NULL) {
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name = mntpt;
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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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}
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}
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#ifndef SMALL
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if (checkvfsname(type, typelist))
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return 1;
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(void)memset(&hints, 0, sizeof hints);
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if (!strncmp(type, MOUNT_NFS, MFSNAMELEN)) {
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char *delimp;
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/* look for host:mountpoint */
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if ((delimp = strrchr(name, ':')) != NULL) {
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int len = delimp - name;
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hostp = malloc(len + 1);
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if (hostp == NULL)
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return 1;
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memcpy(hostp, name, len);
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hostp[len] = 0;
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name += len + 1;
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getaddrinfo(hostp, NULL, &hints, &ai);
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}
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}
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if (!namematch(ai))
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return 1;
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#endif /* ! SMALL */
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}
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#ifndef SMALL
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if (verbose)
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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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#endif /* ! SMALL */
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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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#ifndef SMALL
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if (ai != NULL && !(fflag & MNT_FORCE)) {
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clp = clnt_create(hostp, RPCPROG_MNT, RPCMNT_VER1, "udp");
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if (clp == 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 = authsys_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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#endif /* ! SMALL */
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return 0;
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}
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static char *
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getmntname(const char *name, mntwhat what, char **type)
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{
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static struct statvfs *mntbuf;
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static int mntsize;
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int i;
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if (mntbuf == NULL &&
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(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 = mntsize - 1; i >= 0; 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_fstypename;
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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_fstypename;
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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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#ifndef SMALL
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static int
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sacmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
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{
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void *p1, *p2;
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int len;
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if (sa1->sa_family != sa2->sa_family)
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return 1;
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switch (sa1->sa_family) {
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case AF_INET:
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p1 = &((struct sockaddr_in *)sa1)->sin_addr;
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p2 = &((struct sockaddr_in *)sa2)->sin_addr;
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len = 4;
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break;
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case AF_INET6:
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p1 = &((struct sockaddr_in6 *)sa1)->sin6_addr;
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p2 = &((struct sockaddr_in6 *)sa2)->sin6_addr;
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len = 16;
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if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
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((struct sockaddr_in6 *)sa2)->sin6_scope_id)
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return 1;
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break;
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default:
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return 1;
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}
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return memcmp(p1, p2, len);
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}
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static int
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namematch(const struct addrinfo *ai)
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{
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struct addrinfo *aip;
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if (nfshost == NULL || nfshost_ai == NULL)
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return (1);
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while (ai != NULL) {
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aip = nfshost_ai;
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while (aip != NULL) {
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if (sacmp(ai->ai_addr, aip->ai_addr) == 0)
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return 1;
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aip = aip->ai_next;
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}
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ai = ai->ai_next;
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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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static int
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xdr_dir(XDR *xdrsp, 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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#endif /* !SMALL */
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static void
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usage(void)
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{
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#ifdef SMALL
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(void)fprintf(stderr,
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"Usage: %s [-fR] special | node\n", getprogname());
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#else
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(void)fprintf(stderr,
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"Usage: %s [-fvFR] [-t fstypelist] special | node\n"
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"\t %s -a[fvF] [-h host] [-t fstypelist]\n", getprogname(),
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getprogname());
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#endif /* SMALL */
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exit(1);
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}
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