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      1 /* $NetBSD: mount_ados.c,v 1.30 2020/07/26 08:20:22 mlelstv 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 1.30 2020/07/26 08:20:22 mlelstv Exp $");
     40 #endif /* not lint */
     41 
     42 #include <sys/param.h>
     43 #include <sys/mount.h>
     44 #include <sys/stat.h>
     45 #include <assert.h>
     46 #include <err.h>
     47 #include <grp.h>
     48 #include <pwd.h>
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 #include <unistd.h>
     53 
     54 #include <adosfs/adosfs.h>
     55 
     56 #include <mntopts.h>
     57 #include <errno.h>
     58 
     59 #include "mountprog.h"
     60 
     61 static const struct mntopt mopts[] = {
     62 	MOPT_STDOPTS,
     63 	MOPT_GETARGS,
     64 	MOPT_NULL,
     65 };
     66 
     67 int	mount_ados(int argc, char **argv);
     68 __dead static void	usage(void);
     69 
     70 #ifndef MOUNT_NOMAIN
     71 int
     72 main(int argc, char **argv)
     73 {
     74 	return mount_ados(argc, argv);
     75 }
     76 #endif
     77 
     78 int
     79 mount_ados(int argc, char **argv)
     80 {
     81 	struct adosfs_args args;
     82 	struct stat sb;
     83 	mntoptparse_t mp;
     84 	int c, mntflags, set_gid, set_uid, set_mask;
     85 	char *dev, *dir, canon_dir[MAXPATHLEN], canon_dev[MAXPATHLEN];
     86 
     87 	mntflags = set_gid = set_uid = set_mask = 0;
     88 	(void)memset(&args, '\0', sizeof(args));
     89 
     90 	while ((c = getopt(argc, argv, "u:g:m:o:")) != -1) {
     91 		switch (c) {
     92 		case 'u':
     93 			args.uid = a_uid(optarg);
     94 			set_uid = 1;
     95 			break;
     96 		case 'g':
     97 			args.gid = a_gid(optarg);
     98 			set_gid = 1;
     99 			break;
    100 		case 'm':
    101 			args.mask = a_mask(optarg);
    102 			set_mask = 1;
    103 			break;
    104 		case 'o':
    105 			mp = getmntopts(optarg, mopts, &mntflags, 0);
    106 			if (mp == NULL)
    107 				err(1, "getmntopts");
    108 			freemntopts(mp);
    109 			break;
    110 		case '?':
    111 		default:
    112 			usage();
    113 			break;
    114 		}
    115 	}
    116 
    117 	if (optind + 2 != argc)
    118 		usage();
    119 
    120 	dev = argv[optind];
    121 	dir = argv[optind + 1];
    122 
    123 	pathadj(dev, canon_dev);
    124 	dev = canon_dev;
    125 
    126 	pathadj(dir, canon_dir);
    127 	dir = canon_dir;
    128 
    129 	args.fspec = dev;
    130 	if (!set_gid || !set_uid || !set_mask) {
    131 		if (stat(dir, &sb) == -1)
    132 			err(1, "stat %s", dir);
    133 
    134 		if (!set_uid)
    135 			args.uid = sb.st_uid;
    136 		if (!set_gid)
    137 			args.gid = sb.st_gid;
    138 		if (!set_mask)
    139 			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
    140 	}
    141 
    142 	if (mount(MOUNT_ADOSFS, dir, mntflags, &args, sizeof args) == -1)
    143 		if (errno != EROFS)
    144 			err(1, "%s on %s", dev, dir);
    145 
    146 	if (mntflags & MNT_GETARGS) {
    147 		assert(errno != EROFS);
    148 		printf("uid=%d, gid=%d, mask=0%o\n", args.uid, args.gid,
    149 		    args.mask);
    150 		exit(0);
    151 	}
    152 
    153 	mntflags |= MNT_RDONLY;
    154 	if (mount(MOUNT_ADOSFS, dir, mntflags, &args, sizeof args) == -1)
    155 		err(1, "%s on %s", dev, dir);
    156 
    157 	exit (0);
    158 }
    159 
    160 static void
    161 usage(void)
    162 {
    163 
    164 	fprintf(stderr, "usage: mount_ados [-o options] [-u user] [-g group] [-m mask] bdev dir\n");
    165 	exit(1);
    166 }
    167