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mount_ados.c revision 1.14 
      1 /* $NetBSD: mount_ados.c,v 1.14 2002/09/21 18:43:33 christos Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1994 Christopher G. Demetriou
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *          This product includes software developed for the
     18  *          NetBSD Project.  See http://www.netbsd.org/ for
     19  *          information about NetBSD.
     20  * 4. The name of the author may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  *
     34  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 #ifndef lint
     39 __RCSID("$NetBSD: mount_ados.c,v 1.14 2002/09/21 18:43:33 christos Exp $");
     40 #endif /* not lint */
     41 
     42 #include <sys/cdefs.h>
     43 #include <sys/param.h>
     44 #include <sys/mount.h>
     45 #include <sys/stat.h>
     46 #include <ctype.h>
     47 #include <err.h>
     48 #include <grp.h>
     49 #include <pwd.h>
     50 #include <stdio.h>
     51 #include <stdlib.h>
     52 #include <string.h>
     53 #include <unistd.h>
     54 
     55 #include <adosfs/adosfs.h>
     56 
     57 #include "mntopts.h"
     58 #include <errno.h>
     59 #include <fattr.h>
     60 
     61 static const struct mntopt mopts[] = {
     62 	MOPT_STDOPTS,
     63 	MOPT_GETARGS,
     64 	{ NULL }
     65 };
     66 
     67 int	main __P((int, char *[]));
     68 int	mount_ados __P((int argc, char **argv));
     69 static void	usage __P((void));
     70 
     71 #ifndef MOUNT_NOMAIN
     72 int
     73 main(int argc, char **argv)
     74 {
     75 	return mount_ados(argc, argv);
     76 }
     77 #endif
     78 
     79 int
     80 mount_ados(argc, argv)
     81 	int argc;
     82 	char **argv;
     83 {
     84 	struct adosfs_args args;
     85 	struct stat sb;
     86 	int c, mntflags, set_gid, set_uid, set_mask;
     87 	char *dev, *dir, ndir[MAXPATHLEN+1];
     88 
     89 	mntflags = set_gid = set_uid = set_mask = 0;
     90 	(void)memset(&args, '\0', sizeof(args));
     91 
     92 	while ((c = getopt(argc, argv, "u:g:m:o:")) != -1) {
     93 		switch (c) {
     94 		case 'u':
     95 			args.uid = a_uid(optarg);
     96 			set_uid = 1;
     97 			break;
     98 		case 'g':
     99 			args.gid = a_gid(optarg);
    100 			set_gid = 1;
    101 			break;
    102 		case 'm':
    103 			args.mask = a_mask(optarg);
    104 			set_mask = 1;
    105 			break;
    106 		case 'o':
    107 			getmntopts(optarg, mopts, &mntflags, 0);
    108 			break;
    109 		case '?':
    110 		default:
    111 			usage();
    112 			break;
    113 		}
    114 	}
    115 
    116 	if (optind + 2 != argc)
    117 		usage();
    118 
    119 	dev = argv[optind];
    120 	dir = argv[optind + 1];
    121 	if (dir[0] != '/') {
    122 		warnx("\"%s\" is a relative path.", dir);
    123 		if (getcwd(ndir, sizeof(ndir)) == NULL)
    124 			err(1, "getcwd");
    125 		strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1);
    126 		strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1);
    127 		dir = ndir;
    128 		warnx("using \"%s\" instead.", dir);
    129 	}
    130 
    131 	args.fspec = dev;
    132 	args.export.ex_root = -2;	/* unchecked anyway on DOS fs */
    133 	if (mntflags & MNT_RDONLY)
    134 		args.export.ex_flags = MNT_EXRDONLY;
    135 	else
    136 		args.export.ex_flags = 0;
    137 	if (!set_gid || !set_uid || !set_mask) {
    138 		if (stat(dir, &sb) == -1)
    139 			err(1, "stat %s", dir);
    140 
    141 		if (!set_uid)
    142 			args.uid = sb.st_uid;
    143 		if (!set_gid)
    144 			args.gid = sb.st_gid;
    145 		if (!set_mask)
    146 			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
    147 	}
    148 
    149 	if (mount(MOUNT_ADOSFS, dir, mntflags, &args) >= 0)
    150 		exit (0);
    151 
    152 	if (errno != EROFS)
    153 		err(1, "%s on %s", dev, dir);
    154 
    155 	mntflags |= MNT_RDONLY;
    156 	args.export.ex_flags = MNT_EXRDONLY;
    157 
    158 	if (mount(MOUNT_ADOSFS, dir, mntflags, &args) == -1)
    159 		err(1, "%s on %s", dev, dir);
    160 
    161 	if (mntflags & MNT_GETARGS)
    162 		printf("uid=%d, gid=%d, mask=%d\n", args.uid, args.gid,
    163 		    args.mask);
    164 
    165 	exit (0);
    166 }
    167 
    168 static void
    169 usage()
    170 {
    171 
    172 	fprintf(stderr, "usage: mount_ados [-o options] [-u user] [-g group] [-m mask] bdev dir\n");
    173 	exit(1);
    174 }
    175