133549Sjkh/*	$NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $	*/
233549Sjkh
3330449Seadler/*-
4330449Seadler * SPDX-License-Identifier: BSD-4-Clause
5330449Seadler *
62892Sdfr * Copyright (c) 1994 Christopher G. Demetriou
72892Sdfr * All rights reserved.
82892Sdfr *
92892Sdfr * Redistribution and use in source and binary forms, with or without
102892Sdfr * modification, are permitted provided that the following conditions
112892Sdfr * are met:
122892Sdfr * 1. Redistributions of source code must retain the above copyright
132892Sdfr *    notice, this list of conditions and the following disclaimer.
142892Sdfr * 2. Redistributions in binary form must reproduce the above copyright
152892Sdfr *    notice, this list of conditions and the following disclaimer in the
162892Sdfr *    documentation and/or other materials provided with the distribution.
172892Sdfr * 3. All advertising materials mentioning features or use of this software
182892Sdfr *    must display the following acknowledgement:
192892Sdfr *      This product includes software developed by Christopher G. Demetriou.
202892Sdfr * 4. The name of the author may not be used to endorse or promote products
212892Sdfr *    derived from this software without specific prior written permission
222892Sdfr *
232892Sdfr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
242892Sdfr * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
252892Sdfr * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
262892Sdfr * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
272892Sdfr * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
282892Sdfr * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
292892Sdfr * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
302892Sdfr * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
312892Sdfr * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
322892Sdfr * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
332892Sdfr */
342892Sdfr
352892Sdfr#ifndef lint
3615771Swollmanstatic const char rcsid[] =
3750476Speter  "$FreeBSD: stable/11/sbin/mount_msdosfs/mount_msdosfs.c 340953 2018-11-26 11:22:04Z eugen $";
382892Sdfr#endif /* not lint */
392892Sdfr
402892Sdfr#include <sys/param.h>
412892Sdfr#include <sys/mount.h>
422892Sdfr#include <sys/stat.h>
43120492Sfjoe#include <sys/iconv.h>
44121363Strhodes#include <sys/linker.h>
45121429Strhodes#include <sys/module.h>
4623335Sbde
472892Sdfr#include <ctype.h>
482892Sdfr#include <err.h>
49340953Seugen#include <errno.h>
502892Sdfr#include <grp.h>
5133761Sache#include <locale.h>
522892Sdfr#include <pwd.h>
532892Sdfr#include <stdio.h>
5455613Sache/* must be after stdio to declare fparseln */
5555613Sache#include <libutil.h>
562892Sdfr#include <stdlib.h>
572892Sdfr#include <string.h>
5815771Swollman#include <sysexits.h>
592892Sdfr#include <unistd.h>
60121429Strhodes
612892Sdfr#include "mntopts.h"
622892Sdfr
6392882Simpstatic gid_t	a_gid(char *);
6492882Simpstatic uid_t	a_uid(char *);
6592882Simpstatic mode_t	a_mask(char *);
6692882Simpstatic void	usage(void) __dead2;
67152809Savatarstatic int	set_charset(struct iovec **iov, int *iovlen, const char *, const char *);
682892Sdfr
692892Sdfrint
70121373Strhodesmain(int argc, char **argv)
712892Sdfr{
72152416Smaxim	struct iovec *iov = NULL;
73152416Smaxim	int iovlen = 0;
742892Sdfr	struct stat sb;
75247856Sjkim	int c, set_gid, set_uid, set_mask, set_dirmask;
76120492Sfjoe	char *dev, *dir, mntpath[MAXPATHLEN], *csp;
77152362Srodrigc	char fstype[] = "msdosfs";
78166326Srodrigc	char errmsg[255] = {0};
79152362Srodrigc	char *cs_dos = NULL;
80152362Srodrigc	char *cs_local = NULL;
81152362Srodrigc	mode_t mask = 0, dirmask = 0;
82152362Srodrigc	uid_t uid = 0;
83152362Srodrigc	gid_t gid = 0;
842892Sdfr
85247856Sjkim	set_gid = set_uid = set_mask = set_dirmask = 0;
862892Sdfr
87152731Savatar	while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) {
882892Sdfr		switch (c) {
8933549Sjkh		case 's':
90152362Srodrigc			build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1);
9133549Sjkh			break;
9233549Sjkh		case 'l':
93152362Srodrigc			build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1);
9433549Sjkh			break;
9533549Sjkh		case '9':
96152731Savatar			build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1);
9733549Sjkh			break;
982892Sdfr		case 'u':
99152362Srodrigc			uid = a_uid(optarg);
1002892Sdfr			set_uid = 1;
1012892Sdfr			break;
1022892Sdfr		case 'g':
103152362Srodrigc			gid = a_gid(optarg);
1042892Sdfr			set_gid = 1;
1052892Sdfr			break;
1062892Sdfr		case 'm':
107152362Srodrigc			mask = a_mask(optarg);
1082892Sdfr			set_mask = 1;
1092892Sdfr			break;
110118837Strhodes		case 'M':
111152362Srodrigc			dirmask = a_mask(optarg);
112118837Strhodes			set_dirmask = 1;
113118837Strhodes			break;
114152362Srodrigc		case 'L': {
115152362Srodrigc			const char *quirk = NULL;
116120492Sfjoe			if (setlocale(LC_CTYPE, optarg) == NULL)
117120492Sfjoe				err(EX_CONFIG, "%s", optarg);
118120492Sfjoe			csp = strchr(optarg,'.');
119120492Sfjoe			if (!csp)
120120492Sfjoe				err(EX_CONFIG, "%s", optarg);
121152362Srodrigc			quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT);
122152362Srodrigc			build_iovec_argf(&iov, &iovlen, "cs_local", quirk);
123152974Savatar			cs_local = strdup(quirk);
124152362Srodrigc			}
12533761Sache			break;
126120492Sfjoe		case 'D':
127152362Srodrigc			cs_dos = strdup(optarg);
128152362Srodrigc			build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
12933749Sache			break;
130152362Srodrigc		case 'o': {
131152362Srodrigc			char *p = NULL;
132152362Srodrigc			char *val = strdup("");
133152416Smaxim			p = strchr(optarg, '=');
134152416Smaxim			if (p != NULL) {
135152362Srodrigc				free(val);
136152362Srodrigc				*p = '\0';
137152362Srodrigc				val = p + 1;
138152362Srodrigc			}
139152362Srodrigc			build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
140152362Srodrigc			}
1412892Sdfr			break;
142120492Sfjoe		case 'W':
143120492Sfjoe			if (strcmp(optarg, "iso22dos") == 0) {
144152362Srodrigc				cs_local = strdup("ISO8859-2");
145152362Srodrigc				cs_dos = strdup("CP852");
146120492Sfjoe			} else if (strcmp(optarg, "iso72dos") == 0) {
147152362Srodrigc				cs_local = strdup("ISO8859-7");
148152362Srodrigc				cs_dos = strdup("CP737");
149120492Sfjoe			} else if (strcmp(optarg, "koi2dos") == 0) {
150152362Srodrigc				cs_local = strdup("KOI8-R");
151152362Srodrigc				cs_dos = strdup("CP866");
152120492Sfjoe			} else if (strcmp(optarg, "koi8u2dos") == 0) {
153152362Srodrigc				cs_local = strdup("KOI8-U");
154152362Srodrigc				cs_dos = strdup("CP866");
155120492Sfjoe			} else {
156120492Sfjoe				err(EX_NOINPUT, "%s", optarg);
157120492Sfjoe			}
158152362Srodrigc			build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1);
159152362Srodrigc			build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
160120492Sfjoe			break;
1612892Sdfr		case '?':
1622892Sdfr		default:
1632892Sdfr			usage();
1642892Sdfr			break;
1652892Sdfr		}
1662892Sdfr	}
1672892Sdfr
1682892Sdfr	if (optind + 2 != argc)
1692892Sdfr		usage();
1702892Sdfr
171118837Strhodes	if (set_mask && !set_dirmask) {
172152362Srodrigc		dirmask = mask;
173118837Strhodes		set_dirmask = 1;
174118837Strhodes	}
175118837Strhodes	else if (set_dirmask && !set_mask) {
176152362Srodrigc		mask = dirmask;
177118837Strhodes		set_mask = 1;
178118837Strhodes	}
179118837Strhodes
1802892Sdfr	dev = argv[optind];
1812892Sdfr	dir = argv[optind + 1];
1822892Sdfr
183152362Srodrigc	if (cs_local != NULL) {
184152809Savatar		if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1)
185120492Sfjoe			err(EX_OSERR, "msdosfs_iconv");
186152362Srodrigc		build_iovec_argf(&iov, &iovlen, "kiconv", "");
187152362Srodrigc	} else if (cs_dos != NULL) {
188152362Srodrigc		build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1");
189152809Savatar		if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1)
190120492Sfjoe			err(EX_OSERR, "msdosfs_iconv");
191152362Srodrigc		build_iovec_argf(&iov, &iovlen, "kiconv", "");
192120492Sfjoe	}
193120492Sfjoe
19452055Sphk	/*
19552055Sphk	 * Resolve the mountpoint with realpath(3) and remove unnecessary
19652055Sphk	 * slashes from the devicename if there are any.
19752055Sphk	 */
198230226Sjh	if (checkpath(dir, mntpath) != 0)
199230226Sjh		err(EX_USAGE, "%s", mntpath);
20052055Sphk	(void)rmslashes(dev, dev);
20152055Sphk
2022892Sdfr	if (!set_gid || !set_uid || !set_mask) {
20352055Sphk		if (stat(mntpath, &sb) == -1)
20452055Sphk			err(EX_OSERR, "stat %s", mntpath);
2052892Sdfr
2062892Sdfr		if (!set_uid)
207152362Srodrigc			uid = sb.st_uid;
2082892Sdfr		if (!set_gid)
209152362Srodrigc			gid = sb.st_gid;
2102892Sdfr		if (!set_mask)
211152362Srodrigc			mask = dirmask =
212118837Strhodes				sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
2132892Sdfr	}
2142892Sdfr
215152362Srodrigc	build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
216152362Srodrigc	build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
217152362Srodrigc	build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
218166326Srodrigc	build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
219152362Srodrigc	build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
220152362Srodrigc	build_iovec_argf(&iov, &iovlen, "gid", "%u", gid);
221152362Srodrigc	build_iovec_argf(&iov, &iovlen, "mask", "%u", mask);
222152362Srodrigc	build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask);
2232892Sdfr
224247856Sjkim	if (nmount(iov, iovlen, 0) < 0) {
225185422Simp		if (errmsg[0])
226185422Simp			err(1, "%s: %s", dev, errmsg);
227185422Simp		else
228185422Simp			err(1, "%s", dev);
229185422Simp	}
230152362Srodrigc
2312892Sdfr	exit (0);
2322892Sdfr}
2332892Sdfr
2342892Sdfrgid_t
235201227Seda_gid(char *s)
2362892Sdfr{
2372892Sdfr	struct group *gr;
2382892Sdfr	char *gname;
2392892Sdfr	gid_t gid;
2402892Sdfr
2412892Sdfr	if ((gr = getgrnam(s)) != NULL)
2422892Sdfr		gid = gr->gr_gid;
2432892Sdfr	else {
2442892Sdfr		for (gname = s; *s && isdigit(*s); ++s);
2452892Sdfr		if (!*s)
2462892Sdfr			gid = atoi(gname);
2472892Sdfr		else
24815771Swollman			errx(EX_NOUSER, "unknown group id: %s", gname);
2492892Sdfr	}
2502892Sdfr	return (gid);
2512892Sdfr}
2522892Sdfr
2532892Sdfruid_t
254201227Seda_uid(char *s)
2552892Sdfr{
2562892Sdfr	struct passwd *pw;
2572892Sdfr	char *uname;
2582892Sdfr	uid_t uid;
2592892Sdfr
2602892Sdfr	if ((pw = getpwnam(s)) != NULL)
2612892Sdfr		uid = pw->pw_uid;
2622892Sdfr	else {
2632892Sdfr		for (uname = s; *s && isdigit(*s); ++s);
2642892Sdfr		if (!*s)
2652892Sdfr			uid = atoi(uname);
2662892Sdfr		else
26715771Swollman			errx(EX_NOUSER, "unknown user id: %s", uname);
2682892Sdfr	}
2692892Sdfr	return (uid);
2702892Sdfr}
2712892Sdfr
2722892Sdfrmode_t
273201227Seda_mask(char *s)
2742892Sdfr{
2752892Sdfr	int done, rv;
2762892Sdfr	char *ep;
2772892Sdfr
2782892Sdfr	done = 0;
27933549Sjkh	rv = -1;
2802892Sdfr	if (*s >= '0' && *s <= '7') {
2812892Sdfr		done = 1;
2822892Sdfr		rv = strtol(optarg, &ep, 8);
2832892Sdfr	}
2842892Sdfr	if (!done || rv < 0 || *ep)
28515771Swollman		errx(EX_USAGE, "invalid file mode: %s", s);
2862892Sdfr	return (rv);
2872892Sdfr}
2882892Sdfr
2892892Sdfrvoid
290201227Sedusage(void)
2912892Sdfr{
292121007Sfjoe	fprintf(stderr, "%s\n%s\n%s\n",
293121429Strhodes	"usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
294121429Strhodes	"                     [-M mask] [-m mask] [-o options] [-u uid]",
295121429Strhodes	"		      [-W table] special node");
29615771Swollman	exit(EX_USAGE);
2972892Sdfr}
29833749Sache
299120492Sfjoeint
300152809Savatarset_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos)
30133749Sache{
302120492Sfjoe	int error;
30333749Sache
304120492Sfjoe	if (modfind("msdosfs_iconv") < 0)
305120492Sfjoe		if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
306134565Strhodes			warnx("cannot find or load \"msdosfs_iconv\" kernel module");
307120492Sfjoe			return (-1);
308120492Sfjoe		}
309120492Sfjoe
310152809Savatar	build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE);
311152362Srodrigc	error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
312340953Seugen	if (error && errno != EEXIST)
313120492Sfjoe		return (-1);
314152362Srodrigc	if (cs_dos != NULL) {
315152362Srodrigc		error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
316340953Seugen		if (error && errno != EEXIST)
317120492Sfjoe			return (-1);
318120492Sfjoe	} else {
319152809Savatar		build_iovec_argf(iov, iovlen, "cs_dos", cs_local);
320152362Srodrigc		error = kiconv_add_xlat16_cspair(cs_local, cs_local,
321120492Sfjoe				KICONV_FROM_UPPER | KICONV_LOWER);
322340953Seugen		if (error && errno != EEXIST)
323120492Sfjoe			return (-1);
32433749Sache	}
32533761Sache
326120492Sfjoe	return (0);
32733761Sache}
328