GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/mount_msdos/mount_msdos.c Lines: 0 72 0.0 %
Date: 2017-11-13 Branches: 0 46 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mount_msdos.c,v 1.33 2016/05/21 19:14:02 jmc Exp $	*/
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/*	$NetBSD: mount_msdos.c,v 1.16 1996/10/24 00:12:50 cgd Exp $	*/
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/*
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 * Copyright (c) 1994 Christopher G. Demetriou
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 * 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 Christopher G. Demetriou.
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 * 4. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <sys/types.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <grp.h>
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#include <pwd.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 <limits.h>
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#include <errno.h>
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#include "mntopts.h"
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const struct mntopt mopts[] = {
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	MOPT_STDOPTS,
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	MOPT_UPDATE,
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	MOPT_ASYNC,
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	{ NULL }
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};
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gid_t	a_gid(char *);
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uid_t	a_uid(char *);
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mode_t	a_mask(char *);
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void	usage(void);
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int
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main(int argc, char **argv)
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{
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	struct msdosfs_args args;
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	struct stat sb;
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	int c, mntflags, set_gid, set_uid, set_mask;
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	char *dev, dir[PATH_MAX];
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	char *errcause;
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	mntflags = set_gid = set_uid = set_mask = 0;
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	(void)memset(&args, '\0', sizeof(args));
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	while ((c = getopt(argc, argv, "sl9u:g:m:o:")) != -1) {
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		switch (c) {
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		case 's':
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			args.flags |= MSDOSFSMNT_SHORTNAME;
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			break;
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		case 'l':
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			args.flags |= MSDOSFSMNT_LONGNAME;
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			break;
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		case '9':
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			args.flags |= MSDOSFSMNT_NOWIN95;
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			break;
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		case 'u':
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			args.uid = a_uid(optarg);
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			set_uid = 1;
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			break;
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		case 'g':
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			args.gid = a_gid(optarg);
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			set_gid = 1;
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			break;
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		case 'm':
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			args.mask = a_mask(optarg);
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			set_mask = 1;
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			break;
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		case 'o':
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			getmntopts(optarg, mopts, &mntflags);
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			break;
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		case '?':
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		default:
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			usage();
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			break;
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		}
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	}
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	if (optind + 2 != argc)
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		usage();
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	dev = argv[optind];
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	if (realpath(argv[optind + 1], dir) == NULL)
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		err(1, "realpath %s", argv[optind + 1]);
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	args.fspec = dev;
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	args.export_info.ex_root = -2;	/* unchecked anyway on DOS fs */
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	if (mntflags & MNT_RDONLY)
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		args.export_info.ex_flags = MNT_EXRDONLY;
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	else
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		args.export_info.ex_flags = 0;
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	if (!set_gid || !set_uid || !set_mask) {
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		if (stat(dir, &sb) == -1)
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			err(1, "stat %s", dir);
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		if (!set_uid)
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			args.uid = sb.st_uid;
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		if (!set_gid)
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			args.gid = sb.st_gid;
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		if (!set_mask)
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			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
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	}
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	if (mount(MOUNT_MSDOS, dir, mntflags, &args) < 0) {
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		switch (errno) {
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		case EOPNOTSUPP:
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			errcause = "filesystem not supported by kernel";
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			break;
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		case EMFILE:
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			errcause = "mount table full";
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			break;
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		case EINVAL:
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			errcause =
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			    "not an MSDOS filesystem";
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			break;
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		default:
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			errcause = strerror(errno);
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			break;
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		}
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		errx(1, "%s on %s: %s", args.fspec, dir, errcause);
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	}
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	exit (0);
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}
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gid_t
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a_gid(char *s)
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{
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	struct group *gr;
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	const char *errstr;
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	gid_t gid;
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	if ((gr = getgrnam(s)) != NULL)
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		return gr->gr_gid;
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	gid = strtonum(s, 0, GID_MAX, &errstr);
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	if (errstr)
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		errx(1, "group is %s: %s", errstr, s);
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	return (gid);
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}
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uid_t
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a_uid(char *s)
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{
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	struct passwd *pw;
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	const char *errstr;
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	uid_t uid;
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	if ((pw = getpwnam(s)) != NULL)
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		return pw->pw_uid;
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	uid = strtonum(s, 0, UID_MAX, &errstr);
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	if (errstr)
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		errx(1, "user is %s: %s", errstr, s);
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	return (uid);
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}
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mode_t
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a_mask(char *s)
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{
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	int done, rv;
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	char *ep;
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	done = 0;
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	if (*s >= '0' && *s <= '7') {
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		done = 1;
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		rv = strtol(optarg, &ep, 8);
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	}
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	if (!done || rv < 0 || *ep)
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		errx(1, "invalid file mode: %s", s);
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	return (rv);
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}
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void
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usage(void)
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{
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	fprintf(stderr,
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	    "usage: mount_msdos [-9ls] [-g gid] [-m mask] [-o options] [-u uid] special node\n");
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	exit(1);
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}