3fa88dec7f
most common cd9660 and nfs options like God intended them. (It is now possible to say mount -o ro,soft,bg,intr there:/foo/bar /foo/bar again.) This whole getmntopt() business is an incredible botch; it never should have been anything more than a wrapper around getsubopt(3). Because if the way the current hackaround is implemented, options which take arguments (like the old `rsize' and `wsize') are still unavailable, and must be accessed the new, broken way. (It's unimaginable how Berkeley managed to screw up one of the few things about NFS that Sun actually got right to begin with!)
242 lines
7.1 KiB
C
242 lines
7.1 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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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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char copyright[] =
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"@(#) Copyright (c) 1992, 1993, 1994\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[] = "@(#)mount_umap.c 8.3 (Berkeley) 3/27/94";
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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/stat.h>
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#include <miscfs/umapfs/umap.h>
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#include <err.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 "mntopts.h"
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#define ROOTUSER 0
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/*
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* This define controls whether any user but the superuser can own and
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* write mapfiles. If other users can, system security can be gravely
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* compromised. If this is not a concern, undefine SECURITY.
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*/
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#define MAPSECURITY 1
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/*
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* This routine provides the user interface to mounting a umap layer.
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* It takes 4 mandatory parameters. The mandatory arguments are the place
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* where the next lower level is mounted, the place where the umap layer is to
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* be mounted, the name of the user mapfile, and the name of the group
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* mapfile. The routine checks the ownerships and permissions on the
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* mapfiles, then opens and reads them. Then it calls mount(), which
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* will, in turn, call the umap version of mount.
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*/
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struct mntopt mopts[] = {
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MOPT_STDOPTS,
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{ NULL }
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};
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void usage __P((void));
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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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static char not[] = "; not mounted.";
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struct stat statbuf;
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struct umap_args args;
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FILE *fp, *gfp;
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u_long gmapdata[GMAPFILEENTRIES][2], mapdata[MAPFILEENTRIES][2];
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int ch, count, gnentries, mntflags, nentries;
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char *gmapfile, *mapfile, *source, *target, buf[20];
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struct vfsconf *vfc;
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mntflags = 0;
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mapfile = gmapfile = NULL;
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while ((ch = getopt(argc, argv, "g:o:u:")) != EOF)
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switch (ch) {
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case 'g':
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gmapfile = optarg;
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break;
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case 'o':
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getmntopts(optarg, mopts, &mntflags, 0);
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break;
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case 'u':
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mapfile = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 2 || mapfile == NULL || gmapfile == NULL)
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usage();
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source = argv[0];
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target = argv[1];
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/* Read in uid mapping data. */
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if ((fp = fopen(mapfile, "r")) == NULL)
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err(1, "%s%s", mapfile, not);
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#ifdef MAPSECURITY
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/*
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* Check that group and other don't have write permissions on
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* this mapfile, and that the mapfile belongs to root.
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*/
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if (fstat(fileno(fp), &statbuf))
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err(1, "%s%s", mapfile, not);
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if (statbuf.st_mode & S_IWGRP || statbuf.st_mode & S_IWOTH) {
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strmode(statbuf.st_mode, buf);
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err(1, "%s: improper write permissions (%s)%s",
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mapfile, buf, not);
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}
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if (statbuf.st_uid != ROOTUSER)
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errx(1, "%s does not belong to root%s", mapfile, not);
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#endif /* MAPSECURITY */
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if ((fscanf(fp, "%d\n", &nentries)) != 1)
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errx(1, "%s: nentries not found%s", mapfile, not);
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if (nentries > MAPFILEENTRIES)
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errx(1,
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"maximum number of entries is %d%s", MAPFILEENTRIES, not);
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#if 0
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(void)printf("reading %d entries\n", nentries);
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#endif
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for (count = 0; count < nentries; ++count) {
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if ((fscanf(fp, "%lu %lu\n",
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&(mapdata[count][0]), &(mapdata[count][1]))) != 2) {
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if (ferror(fp))
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err(1, "%s%s", mapfile, not);
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if (feof(fp))
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errx(1, "%s: unexpected end-of-file%s",
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mapfile, not);
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errx(1, "%s: illegal format (line %d)%s",
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mapfile, count + 2, not);
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}
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#if 0
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/* Fix a security hole. */
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if (mapdata[count][1] == 0)
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errx(1, "mapping id 0 not permitted (line %d)%s",
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count + 2, not);
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#endif
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}
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/* Read in gid mapping data. */
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if ((gfp = fopen(gmapfile, "r")) == NULL)
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err(1, "%s%s", gmapfile, not);
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#ifdef MAPSECURITY
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/*
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* Check that group and other don't have write permissions on
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* this group mapfile, and that the file belongs to root.
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*/
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if (fstat(fileno(gfp), &statbuf))
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err(1, "%s%s", gmapfile, not);
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if (statbuf.st_mode & S_IWGRP || statbuf.st_mode & S_IWOTH) {
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strmode(statbuf.st_mode, buf);
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err(1, "%s: improper write permissions (%s)%s",
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gmapfile, buf, not);
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}
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if (statbuf.st_uid != ROOTUSER)
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errx(1, "%s does not belong to root%s", gmapfile, not);
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#endif /* MAPSECURITY */
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if ((fscanf(fp, "%d\n", &gnentries)) != 1)
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errx(1, "nentries not found%s", gmapfile, not);
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if (gnentries > MAPFILEENTRIES)
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errx(1,
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"maximum number of entries is %d%s", GMAPFILEENTRIES, not);
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#if 0
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(void)printf("reading %d group entries\n", gnentries);
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#endif
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for (count = 0; count < gnentries; ++count)
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if ((fscanf(fp, "%lu %lu\n",
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&(gmapdata[count][0]), &(gmapdata[count][1]))) != 2) {
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if (ferror(fp))
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err(1, "%s%s", gmapfile, not);
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if (feof(fp))
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errx(1, "%s: unexpected end-of-file%s",
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gmapfile, not);
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errx(1, "%s: illegal format (line %d)%s",
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gmapfile, count + 2, not);
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}
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/* Setup mount call args. */
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args.target = source;
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args.nentries = nentries;
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args.mapdata = mapdata;
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args.gnentries = gnentries;
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args.gmapdata = gmapdata;
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vfc = getvfsbyname("umap");
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if(!vfc && vfsisloadable("umap")) {
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if(vfsload("umap"))
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err(1, "vfsload(umap)");
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endvfsent(); /* flush cache */
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vfc = getvfsbyname("umap");
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}
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if (mount(vfc ? vfc->vfc_index : MOUNT_UMAP, argv[1], mntflags, &args))
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err(1, NULL);
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exit(0);
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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: mount_umap [-o options] -u usermap -g groupmap target_fs mount_point\n");
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exit(1);
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}
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