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8360efbd6c
associated changes that had to happen to make this possible as well as bugs fixed along the way. Bring in required TLI library routines to support this. Since we don't support TLI we've essentially copied what NetBSD has done, adding a thin layer to emulate direct the TLI calls into BSD socket calls. This is mostly from Sun's tirpc release that was made in 1994, however some fixes were backported from the 1999 release (supposedly only made available after this porting effort was underway). The submitter has agreed to continue on and bring us up to the 1999 release. Several key features are introduced with this update: Client calls are thread safe. (1999 code has server side thread safe) Updated, a more modern interface. Many userland updates were done to bring the code up to par with the recent RPC API. There is an update to the pthreads library, a function pthread_main_np() was added to emulate a function of Sun's threads library. While we're at it, bring in NetBSD's lockd, it's been far too long of a wait. New rpcbind(8) replaces portmap(8) (supporting communication over an authenticated Unix-domain socket, and by default only allowing set and unset requests over that channel). It's much more secure than the old portmapper. Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded to support TI-RPC and to support IPV6. Umount(8) is also fixed to unmount pathnames longer than 80 chars, which are currently truncated by the Kernel statfs structure. Submitted by: Martin Blapp <mb@imp.ch> Manpage review: ru Secure RPC implemented by: wpaul
758 lines
19 KiB
C
758 lines
19 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 const 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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#if 0
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static char sccsid[] = "@(#)umount.c 8.8 (Berkeley) 5/8/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/mount.h>
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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 <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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#include "mounttab.h"
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#define ISDOT(x) ((x)[0] == '.' && (x)[1] == '\0')
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#define ISDOTDOT(x) ((x)[0] == '.' && (x)[1] == '.' && (x)[2] == '\0')
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typedef enum { MNTON, MNTFROM, NOTHING } mntwhat;
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typedef enum { MARK, UNMARK, NAME, COUNT, FREE } dowhat;
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struct mtablist *mtabhead;
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struct addrinfo *nfshost_ai = NULL;
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int fflag, vflag;
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char *nfshost;
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void checkmntlist (char *, char **, char **, char **);
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int checkvfsname (const char *, char **);
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char *getmntname (const char *, const char *,
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mntwhat, char **, dowhat);
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char *getrealname(char *, char *resolved_path);
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char **makevfslist (const char *);
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size_t mntinfo (struct statfs **);
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int namematch (struct addrinfo *);
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int sacmp (struct sockaddr *, struct sockaddr *);
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int umountall (char **);
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int checkname (char *, char **);
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int umountfs (char *, char *, char *);
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void usage (void);
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int xdr_dir (XDR *, char *);
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int
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main(int argc, char *argv[])
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{
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int all, errs, ch, mntsize, error;
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char **typelist = NULL, *mntonname, *mntfromname;
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char *type, *mntfromnamerev, *mntonnamerev;
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struct statfs *mntbuf;
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struct addrinfo hints;
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/* Start disks transferring immediately. */
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sync();
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all = errs = 0;
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while ((ch = getopt(argc, argv, "Aafh:t:v")) != -1)
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switch (ch) {
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case 'A':
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all = 2;
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break;
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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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fflag = MNT_FORCE;
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break;
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case 'h': /* -h implies -A. */
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all = 2;
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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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err(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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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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typelist = makevfslist("nfs");
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if (nfshost != NULL) {
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memset(&hints, 0, sizeof hints);
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error = getaddrinfo(nfshost, NULL, &hints, &nfshost_ai);
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if (error) {
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fprintf(stderr, "ndp: %s: %s\n", nfshost,
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gai_strerror(error));
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}
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}
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switch (all) {
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case 2:
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if ((mntsize = mntinfo(&mntbuf)) <= 0)
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break;
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/*
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* We unmount the nfs-mounts in the reverse order
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* that they were mounted.
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*/
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for (errs = 0, mntsize--; mntsize > 0; mntsize--) {
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if (checkvfsname(mntbuf[mntsize].f_fstypename,
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typelist))
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continue;
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/*
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* Check if a mountpoint is laid over by another mount.
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* A warning will be printed to stderr if this is
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* the case. The laid over mount remains unmounted.
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*/
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mntonname = mntbuf[mntsize].f_mntonname;
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mntfromname = mntbuf[mntsize].f_mntfromname;
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mntonnamerev = getmntname(getmntname(mntonname,
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NULL, MNTFROM, &type, NAME), NULL,
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MNTON, &type, NAME);
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mntfromnamerev = getmntname(mntonnamerev,
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NULL, MNTFROM, &type, NAME);
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if (strcmp(mntonnamerev, mntonname) == 0 &&
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strcmp(mntfromnamerev, mntfromname ) != 0)
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warnx("cannot umount %s, %s\n "
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"is mounted there, umount it first",
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mntonname, mntfromnamerev);
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if (checkname(mntbuf[mntsize].f_mntonname,
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typelist) != 0)
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errs = 1;
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}
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free(mntbuf);
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break;
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case 1:
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if (setfsent() == 0)
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err(1, "%s", _PATH_FSTAB);
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errs = umountall(typelist);
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break;
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case 0:
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for (errs = 0; *argv != NULL; ++argv)
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if (checkname(*argv, typelist) != 0)
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errs = 1;
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break;
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}
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(void)getmntname(NULL, NULL, NOTHING, NULL, FREE);
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exit(errs);
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}
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int
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umountall(char **typelist)
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{
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struct vfsconf vfc;
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struct fstab *fs;
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int rval;
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char *cp;
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static int firstcall = 1;
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if ((fs = getfsent()) != NULL)
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firstcall = 0;
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else if (firstcall)
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errx(1, "fstab reading failure");
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else
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return (0);
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do {
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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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/* Ignore unknown file system types. */
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if (getvfsbyname(fs->fs_vfstype, &vfc) == -1)
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continue;
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if (checkvfsname(fs->fs_vfstype, typelist))
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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, "malloc failed");
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(void)strcpy(cp, fs->fs_file);
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rval = umountall(typelist);
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rval = checkname(cp, typelist) || rval;
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free(cp);
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return (rval);
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} while ((fs = getfsent()) != NULL);
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return (0);
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}
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/*
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* Do magic checks on mountpoint and device or hand over
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* it to unmount(2) if everything fails.
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*/
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int
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checkname(char *name, char **typelist)
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{
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size_t len;
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int speclen;
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char *mntonname, *mntfromname;
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char *mntfromnamerev;
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char *resolved, realname[MAXPATHLEN];
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char *type, *hostp, *delimp, *origname;
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len = 0;
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mntfromname = mntonname = delimp = hostp = NULL;
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/*
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* 1. Check if the name exists in the mounttable.
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*/
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(void)checkmntlist(name, &mntfromname, &mntonname, &type);
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/*
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* 2. Remove trailing slashes if there are any. After that
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* we look up the name in the mounttable again.
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*/
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if (mntfromname == NULL && mntonname == NULL) {
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speclen = strlen(name);
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for (speclen = strlen(name);
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speclen > 1 && name[speclen - 1] == '/';
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speclen--)
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name[speclen - 1] = '\0';
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(void)checkmntlist(name, &mntfromname, &mntonname, &type);
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resolved = name;
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/* Save off original name in origname */
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if ((origname = strdup(name)) == NULL)
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err(1, "strdup");
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/*
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* 3. Check if the deprecated nfs-syntax with an '@'
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* has been used and translate it to the ':' syntax.
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* Look up the name in the mounttable again.
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*/
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if (mntfromname == NULL && mntonname == NULL) {
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if ((delimp = strrchr(name, '@')) != NULL) {
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hostp = delimp + 1;
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if (*hostp != '\0') {
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/*
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* Make both '@' and ':'
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* notations equal
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*/
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char *host = strdup(hostp);
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len = strlen(hostp);
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if (host == NULL)
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err(1, "strdup");
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memmove(name + len + 1, name,
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(size_t)(delimp - name));
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name[len] = ':';
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memmove(name, host, len);
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free(host);
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}
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for (speclen = strlen(name);
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speclen > 1 && name[speclen - 1] == '/';
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speclen--)
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name[speclen - 1] = '\0';
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name[len + speclen + 1] = '\0';
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(void)checkmntlist(name, &mntfromname,
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&mntonname, &type);
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resolved = name;
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}
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/*
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* 4. Check if a relative mountpoint has been
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* specified. This should happen as last check,
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* the order is important. To prevent possible
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* nfs-hangs, we just call realpath(3) on the
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* basedir of mountpoint and add the dirname again.
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* Check the name in mounttable one last time.
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*/
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if (mntfromname == NULL && mntonname == NULL) {
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(void)strcpy(name, origname);
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if ((getrealname(name, realname)) != NULL) {
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(void)checkmntlist(realname,
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&mntfromname, &mntonname, &type);
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resolved = realname;
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}
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/*
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* 5. All tests failed, just hand over the
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* mountpoint to the kernel, maybe the statfs
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* structure has been truncated or is not
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* useful anymore because of a chroot(2).
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* Please note that nfs will not be able to
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* notify the nfs-server about unmounting.
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* These things can change in future when the
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* fstat structure get's more reliable,
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* but at the moment we cannot thrust it.
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*/
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if (mntfromname == NULL && mntonname == NULL) {
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(void)strcpy(name, origname);
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if (umountfs(NULL, origname,
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"none") == 0) {;
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warnx("%s not found in "
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"mount table, "
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"unmounted it anyway",
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origname);
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free(origname);
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return (0);
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} else
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free(origname);
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return (1);
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}
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}
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}
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free(origname);
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} else
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resolved = name;
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if (checkvfsname(type, typelist))
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return (1);
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/*
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* Check if the reverse entrys of the mounttable are really the
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* same as the normal ones.
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*/
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if ((mntfromnamerev = strdup(getmntname(getmntname(mntfromname,
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NULL, MNTON, &type, NAME), NULL, MNTFROM, &type, NAME))) == NULL)
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err(1, "strdup");
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/*
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* Mark the uppermost mount as unmounted.
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*/
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(void)getmntname(mntfromname, mntonname, NOTHING, &type, MARK);
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/*
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* If several equal mounts are in the mounttable, check the order
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* and warn the user if necessary.
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*/
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if (strcmp(mntfromnamerev, mntfromname ) != 0 &&
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strcmp(resolved, mntonname) != 0) {
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warnx("cannot umount %s, %s\n "
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"is mounted there, umount it first",
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mntonname, mntfromnamerev);
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/* call getmntname again to set mntcheck[i] to 0 */
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(void)getmntname(mntfromname, mntonname,
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NOTHING, &type, UNMARK);
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return (1);
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}
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free(mntfromnamerev);
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umountfs(mntfromname, mntonname, type);
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}
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/*
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* NFS stuff and unmount(2) call
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*/
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int
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umountfs(char *mntfromname, char *mntonname, char *type)
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{
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enum clnt_stat clnt_stat;
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struct timeval try;
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struct mtablist *mtab;
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struct addrinfo *ai, hints;
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int do_rpc;
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CLIENT *clp;
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char *nfsdirname, *orignfsdirname;
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char *hostp, *delimp;
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mtab = NULL;
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ai = NULL;
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nfsdirname = delimp = orignfsdirname = NULL;
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memset(&hints, 0, sizeof hints);
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if (!strcmp(type, "nfs")) {
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if ((nfsdirname = strdup(mntfromname)) == NULL)
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err(1, "strdup");
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orignfsdirname = nfsdirname;
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if ((delimp = strrchr(nfsdirname, ':')) != NULL) {
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*delimp = '\0';
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hostp = nfsdirname;
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getaddrinfo(hostp, NULL, &hints, &ai);
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if (ai == NULL) {
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warnx("can't get net id for host");
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}
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nfsdirname = delimp + 1;
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}
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}
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/*
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* Check if we have to start the rpc-call later.
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* If there are still identical nfs-names mounted,
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* we skip the rpc-call. Obviously this has to
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* happen before unmount(2), but it should happen
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* after the previous namecheck.
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*/
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if (strcmp(type, "nfs") == 0 && getmntname(mntfromname, NULL, NOTHING,
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&type, COUNT) != NULL)
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do_rpc = 1;
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else
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do_rpc = 0;
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if (!namematch(ai))
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return (1);
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if (unmount(mntonname, fflag) != 0 ) {
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warn("unmount of %s failed", mntonname);
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return (1);
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}
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if (vflag)
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(void)printf("%s: unmount from %s\n", mntfromname, mntonname);
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/*
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* Report to mountd-server which nfsname
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* has been unmounted.
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*/
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if (ai != NULL && !(fflag & MNT_FORCE) && do_rpc) {
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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, RPCMNT_UMOUNT, xdr_dir,
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nfsdirname, 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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/*
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* Remove the unmounted entry from /var/db/mounttab.
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*/
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if (read_mtab(mtab)) {
|
|
mtab = mtabhead;
|
|
clean_mtab(hostp, nfsdirname);
|
|
if(!write_mtab())
|
|
warnx("cannot remove entry %s:%s",
|
|
hostp, nfsdirname);
|
|
free_mtab();
|
|
}
|
|
free(orignfsdirname);
|
|
auth_destroy(clp->cl_auth);
|
|
clnt_destroy(clp);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
char *
|
|
getmntname(const char *fromname, const char *onname,
|
|
mntwhat what, char **type, dowhat mark)
|
|
{
|
|
static struct statfs *mntbuf;
|
|
static size_t mntsize = 0;
|
|
static char *mntcheck = NULL;
|
|
static char *mntcount = NULL;
|
|
int i, count;
|
|
|
|
if (mntsize <= 0) {
|
|
if ((mntsize = mntinfo(&mntbuf)) <= 0)
|
|
return (NULL);
|
|
}
|
|
if (mntcheck == NULL) {
|
|
if ((mntcheck = calloc(mntsize + 1, sizeof(int))) == NULL ||
|
|
(mntcount = calloc(mntsize + 1, sizeof(int))) == NULL)
|
|
err(1, "calloc");
|
|
}
|
|
/*
|
|
* We want to get the file systems in the reverse order
|
|
* that they were mounted. Mounted and unmounted filesystems
|
|
* are marked or unmarked in a table called 'mntcheck'.
|
|
* Unmount(const char *dir, int flags) does only take the
|
|
* mountpoint as argument, not the destination. If we don't pay
|
|
* attention to the order, it can happen that a overlaying
|
|
* filesystem get's unmounted instead of the one the user
|
|
* has choosen.
|
|
*/
|
|
switch (mark) {
|
|
case NAME:
|
|
/* Return only the specific name */
|
|
for (i = mntsize - 1; i >= 0; i--) {
|
|
if (fromname != NULL && what == MNTON &&
|
|
!strcmp(mntbuf[i].f_mntfromname, fromname) &&
|
|
mntcheck[i] != 1) {
|
|
if (type)
|
|
*type = mntbuf[i].f_fstypename;
|
|
return (mntbuf[i].f_mntonname);
|
|
}
|
|
if (fromname != NULL && what == MNTFROM &&
|
|
!strcmp(mntbuf[i].f_mntonname, fromname) &&
|
|
mntcheck[i] != 1) {
|
|
if (type)
|
|
*type = mntbuf[i].f_fstypename;
|
|
return (mntbuf[i].f_mntfromname);
|
|
}
|
|
}
|
|
return (NULL);
|
|
case MARK:
|
|
/* Mark current mount with '1' and return name */
|
|
for (i = mntsize - 1; i >= 0; i--) {
|
|
if (mntcheck[i] == 0 &&
|
|
(strcmp(mntbuf[i].f_mntonname, onname) == 0) &&
|
|
(strcmp(mntbuf[i].f_mntfromname, fromname) == 0)) {
|
|
mntcheck[i] = 1;
|
|
return (mntbuf[i].f_mntonname);
|
|
}
|
|
}
|
|
return (NULL);
|
|
case UNMARK:
|
|
/* Unmark current mount with '0' and return name */
|
|
for (i = 0; i < mntsize; i++) {
|
|
if (mntcheck[i] == 1 &&
|
|
(strcmp(mntbuf[i].f_mntonname, onname) == 0) &&
|
|
(strcmp(mntbuf[i].f_mntfromname, fromname) == 0)) {
|
|
mntcheck[i] = 0;
|
|
return (mntbuf[i].f_mntonname);
|
|
}
|
|
}
|
|
return (NULL);
|
|
case COUNT:
|
|
/* Count the equal mntfromnames */
|
|
count = 0;
|
|
for (i = mntsize - 1; i >= 0; i--) {
|
|
if (strcmp(mntbuf[i].f_mntfromname, fromname) == 0)
|
|
count++;
|
|
}
|
|
/* Mark the already unmounted mounts and return
|
|
* mntfromname if count <= 1. Else return NULL.
|
|
*/
|
|
for (i = mntsize - 1; i >= 0; i--) {
|
|
if (strcmp(mntbuf[i].f_mntfromname, fromname) == 0) {
|
|
if (mntcount[i] == 1)
|
|
count--;
|
|
else {
|
|
mntcount[i] = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (count <= 1)
|
|
return (mntbuf[i].f_mntonname);
|
|
else
|
|
return (NULL);
|
|
case FREE:
|
|
free(mntbuf);
|
|
free(mntcheck);
|
|
free(mntcount);
|
|
return (NULL);
|
|
default:
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
int
|
|
sacmp(struct sockaddr *sa1, struct sockaddr *sa2)
|
|
{
|
|
void *p1, *p2;
|
|
int len;
|
|
|
|
if (sa1->sa_family != sa2->sa_family)
|
|
return (1);
|
|
|
|
switch (sa1->sa_family) {
|
|
case AF_INET:
|
|
p1 = &((struct sockaddr_in *)sa1)->sin_addr;
|
|
p2 = &((struct sockaddr_in *)sa2)->sin_addr;
|
|
len = 4;
|
|
break;
|
|
case AF_INET6:
|
|
p1 = &((struct sockaddr_in6 *)sa1)->sin6_addr;
|
|
p2 = &((struct sockaddr_in6 *)sa2)->sin6_addr;
|
|
len = 16;
|
|
if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
|
|
((struct sockaddr_in6 *)sa2)->sin6_scope_id)
|
|
return (1);
|
|
break;
|
|
default:
|
|
return (1);
|
|
}
|
|
|
|
return memcmp(p1, p2, len);
|
|
}
|
|
|
|
int
|
|
namematch(struct addrinfo *ai)
|
|
{
|
|
struct addrinfo *aip;
|
|
|
|
if (nfshost == NULL || nfshost_ai == NULL)
|
|
return (1);
|
|
|
|
while (ai != NULL) {
|
|
aip = nfshost_ai;
|
|
while (aip != NULL) {
|
|
if (sacmp(ai->ai_addr, aip->ai_addr) == 0)
|
|
return (1);
|
|
aip = aip->ai_next;
|
|
}
|
|
ai = ai->ai_next;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
checkmntlist(char *name, char **fromname, char **onname, char **type)
|
|
{
|
|
|
|
*fromname = getmntname(name, NULL, MNTFROM, type, NAME);
|
|
if (*fromname == NULL) {
|
|
*onname = getmntname(name, NULL, MNTON, type, NAME);
|
|
if (*onname != NULL)
|
|
*fromname = name;
|
|
} else
|
|
*onname = name;
|
|
}
|
|
|
|
size_t
|
|
mntinfo(struct statfs **mntbuf)
|
|
{
|
|
static struct statfs *origbuf;
|
|
size_t bufsize;
|
|
int mntsize;
|
|
|
|
mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
|
|
if (mntsize <= 0)
|
|
return (0);
|
|
bufsize = (mntsize + 1) * sizeof(struct statfs);
|
|
if ((origbuf = malloc(bufsize)) == NULL)
|
|
err(1, "malloc");
|
|
mntsize = getfsstat(origbuf, (long)bufsize, MNT_NOWAIT);
|
|
*mntbuf = origbuf;
|
|
return (mntsize);
|
|
}
|
|
|
|
char *
|
|
getrealname(char *name, char *realname)
|
|
{
|
|
char *dirname;
|
|
int havedir;
|
|
size_t baselen;
|
|
size_t dirlen;
|
|
|
|
dirname = '\0';
|
|
havedir = 0;
|
|
if (*name == '/') {
|
|
if (ISDOT(name + 1) || ISDOTDOT(name + 1))
|
|
strcpy(realname, "/");
|
|
else {
|
|
if ((dirname = strrchr(name + 1, '/')) == NULL)
|
|
snprintf(realname, MAXPATHLEN, "%s", name);
|
|
else
|
|
havedir = 1;
|
|
}
|
|
} else {
|
|
if (ISDOT(name) || ISDOTDOT(name))
|
|
(void)realpath(name, realname);
|
|
else {
|
|
if ((dirname = strrchr(name, '/')) == NULL) {
|
|
if ((realpath(name, realname)) == NULL)
|
|
return (NULL);
|
|
} else
|
|
havedir = 1;
|
|
}
|
|
}
|
|
if (havedir) {
|
|
*dirname++ = '\0';
|
|
if (ISDOT(dirname)) {
|
|
*dirname = '\0';
|
|
if ((realpath(name, realname)) == NULL)
|
|
return (NULL);
|
|
} else if (ISDOTDOT(dirname)) {
|
|
*--dirname = '/';
|
|
if ((realpath(name, realname)) == NULL)
|
|
return (NULL);
|
|
} else {
|
|
if ((realpath(name, realname)) == NULL)
|
|
return (NULL);
|
|
baselen = strlen(realname);
|
|
dirlen = strlen(dirname);
|
|
if (baselen + dirlen + 1 > MAXPATHLEN)
|
|
return (NULL);
|
|
if (realname[1] == '\0') {
|
|
memmove(realname + 1, dirname, dirlen);
|
|
realname[dirlen + 1] = '\0';
|
|
} else {
|
|
realname[baselen] = '/';
|
|
memmove(realname + baselen + 1,
|
|
dirname, dirlen);
|
|
realname[baselen + dirlen + 1] = '\0';
|
|
}
|
|
}
|
|
}
|
|
return (realname);
|
|
}
|
|
|
|
/*
|
|
* xdr routines for mount rpc's
|
|
*/
|
|
int
|
|
xdr_dir(XDR *xdrsp, char *dirp)
|
|
{
|
|
|
|
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr, "%s\n%s\n",
|
|
"usage: umount [-fv] special | node",
|
|
" umount -a | -A [-fv] [-h host] [-t type]");
|
|
exit(1);
|
|
}
|