1169695Skan/* $NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $ */ 2169695Skan 3169695Skan/*- 4169695Skan * SPDX-License-Identifier: BSD-4-Clause 5169695Skan * 6169695Skan * Copyright (c) 1994 Christopher G. Demetriou 7169695Skan * All rights reserved. 8169695Skan * 9169695Skan * Redistribution and use in source and binary forms, with or without 10169695Skan * modification, are permitted provided that the following conditions 11169695Skan * are met: 12169695Skan * 1. Redistributions of source code must retain the above copyright 13169695Skan * notice, this list of conditions and the following disclaimer. 14169695Skan * 2. Redistributions in binary form must reproduce the above copyright 15169695Skan * notice, this list of conditions and the following disclaimer in the 16169695Skan * documentation and/or other materials provided with the distribution. 17169695Skan * 3. All advertising materials mentioning features or use of this software 18169695Skan * must display the following acknowledgement: 19169695Skan * This product includes software developed by Christopher G. Demetriou. 20169695Skan * 4. The name of the author may not be used to endorse or promote products 21169695Skan * derived from this software without specific prior written permission 22169695Skan * 23169695Skan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24169695Skan * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25169695Skan * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26169695Skan * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27169695Skan * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28169695Skan * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29169695Skan * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30169695Skan * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31169695Skan * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32169695Skan * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33169695Skan */ 34169695Skan 35169695Skan#include <sys/param.h> 36169695Skan#include <sys/mount.h> 37169695Skan#include <sys/stat.h> 38169695Skan#include <sys/iconv.h> 39169695Skan#include <sys/linker.h> 40169695Skan#include <sys/module.h> 41169695Skan 42169695Skan#include <ctype.h> 43169695Skan#include <err.h> 44169695Skan#include <errno.h> 45169695Skan#include <grp.h> 46169695Skan#include <locale.h> 47169695Skan#include <pwd.h> 48169695Skan#include <stdio.h> 49169695Skan/* must be after stdio to declare fparseln */ 50169695Skan#include <libutil.h> 51169695Skan#include <stdlib.h> 52169695Skan#include <string.h> 53169695Skan#include <sysexits.h> 54169695Skan#include <unistd.h> 55169695Skan 56169695Skan#include "mntopts.h" 57169695Skan 58169695Skanstatic gid_t a_gid(char *); 59169695Skanstatic uid_t a_uid(char *); 60169695Skanstatic mode_t a_mask(char *); 61169695Skanstatic void usage(void) __dead2; 62169695Skanstatic int set_charset(struct iovec **iov, int *iovlen, const char *, const char *); 63169695Skan 64169695Skanint 65169695Skanmain(int argc, char **argv) 66169695Skan{ 67169695Skan struct iovec *iov = NULL; 68169695Skan int iovlen = 0; 69169695Skan struct stat sb; 70169695Skan int c, set_gid, set_uid, set_mask, set_dirmask; 71169695Skan char *dev, *dir, mntpath[MAXPATHLEN], *csp; 72169695Skan char fstype[] = "msdosfs"; 73169695Skan char errmsg[255] = {0}; 74169695Skan char *cs_dos = NULL; 75169695Skan char *cs_local = NULL; 76169695Skan mode_t mask = 0, dirmask = 0; 77169695Skan uid_t uid = 0; 78169695Skan gid_t gid = 0; 79169695Skan 80169695Skan set_gid = set_uid = set_mask = set_dirmask = 0; 81169695Skan 82169695Skan while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) { 83169695Skan switch (c) { 84169695Skan case 's': 85169695Skan build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1); 86169695Skan break; 87169695Skan case 'l': 88169695Skan build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1); 89169695Skan break; 90169695Skan case '9': 91169695Skan build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1); 92169695Skan break; 93169695Skan case 'u': 94169695Skan uid = a_uid(optarg); 95169695Skan set_uid = 1; 96169695Skan break; 97169695Skan case 'g': 98169695Skan gid = a_gid(optarg); 99169695Skan set_gid = 1; 100169695Skan break; 101169695Skan case 'm': 102169695Skan mask = a_mask(optarg); 103169695Skan set_mask = 1; 104169695Skan break; 105169695Skan case 'M': 106169695Skan dirmask = a_mask(optarg); 107169695Skan set_dirmask = 1; 108169695Skan break; 109169695Skan case 'L': { 110169695Skan const char *quirk = NULL; 111169695Skan if (setlocale(LC_CTYPE, optarg) == NULL) 112169695Skan err(EX_CONFIG, "%s", optarg); 113169695Skan csp = strchr(optarg,'.'); 114169695Skan if (!csp) 115169695Skan err(EX_CONFIG, "%s", optarg); 116169695Skan quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT); 117169695Skan build_iovec_argf(&iov, &iovlen, "cs_local", quirk); 118169695Skan cs_local = strdup(quirk); 119169695Skan } 120169695Skan break; 121169695Skan case 'D': 122169695Skan cs_dos = strdup(optarg); 123169695Skan build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 124169695Skan break; 125169695Skan case 'o': { 126169695Skan char *p = NULL; 127169695Skan char *val = strdup(""); 128169695Skan p = strchr(optarg, '='); 129169695Skan if (p != NULL) { 130169695Skan free(val); 131169695Skan *p = '\0'; 132169695Skan val = p + 1; 133169695Skan } 134169695Skan build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 135169695Skan } 136169695Skan break; 137169695Skan case 'W': 138169695Skan if (strcmp(optarg, "iso22dos") == 0) { 139169695Skan cs_local = strdup("ISO8859-2"); 140169695Skan cs_dos = strdup("CP852"); 141169695Skan } else if (strcmp(optarg, "iso72dos") == 0) { 142169695Skan cs_local = strdup("ISO8859-7"); 143169695Skan cs_dos = strdup("CP737"); 144169695Skan } else if (strcmp(optarg, "koi2dos") == 0) { 145169695Skan cs_local = strdup("KOI8-R"); 146169695Skan cs_dos = strdup("CP866"); 147169695Skan } else if (strcmp(optarg, "koi8u2dos") == 0) { 148169695Skan cs_local = strdup("KOI8-U"); 149169695Skan cs_dos = strdup("CP866"); 150169695Skan } else { 151169695Skan err(EX_NOINPUT, "%s", optarg); 152169695Skan } 153169695Skan build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1); 154169695Skan build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 155169695Skan break; 156169695Skan case '?': 157169695Skan default: 158169695Skan usage(); 159169695Skan break; 160169695Skan } 161169695Skan } 162169695Skan 163169695Skan if (optind + 2 != argc) 164169695Skan usage(); 165169695Skan 166169695Skan if (set_mask && !set_dirmask) { 167169695Skan dirmask = mask; 168169695Skan set_dirmask = 1; 169169695Skan } 170169695Skan else if (set_dirmask && !set_mask) { 171169695Skan mask = dirmask; 172169695Skan set_mask = 1; 173169695Skan } 174169695Skan 175169695Skan dev = argv[optind]; 176169695Skan dir = argv[optind + 1]; 177169695Skan 178169695Skan if (cs_local != NULL) { 179169695Skan if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1) 180169695Skan err(EX_OSERR, "msdosfs_iconv"); 181169695Skan build_iovec_argf(&iov, &iovlen, "kiconv", ""); 182169695Skan } else if (cs_dos != NULL) { 183169695Skan build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1"); 184 if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1) 185 err(EX_OSERR, "msdosfs_iconv"); 186 build_iovec_argf(&iov, &iovlen, "kiconv", ""); 187 } 188 189 /* 190 * Resolve the mountpoint with realpath(3) and remove unnecessary 191 * slashes from the devicename if there are any. 192 */ 193 if (checkpath(dir, mntpath) != 0) 194 err(EX_USAGE, "%s", mntpath); 195 (void)rmslashes(dev, dev); 196 197 if (!set_gid || !set_uid || !set_mask) { 198 if (stat(mntpath, &sb) == -1) 199 err(EX_OSERR, "stat %s", mntpath); 200 201 if (!set_uid) 202 uid = sb.st_uid; 203 if (!set_gid) 204 gid = sb.st_gid; 205 if (!set_mask) 206 mask = dirmask = 207 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 208 } 209 210 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 211 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 212 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1); 213 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 214 build_iovec_argf(&iov, &iovlen, "uid", "%d", uid); 215 build_iovec_argf(&iov, &iovlen, "gid", "%u", gid); 216 build_iovec_argf(&iov, &iovlen, "mask", "%u", mask); 217 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask); 218 219 if (nmount(iov, iovlen, 0) < 0) { 220 if (errmsg[0]) 221 err(1, "%s: %s", dev, errmsg); 222 else 223 err(1, "%s", dev); 224 } 225 226 exit (0); 227} 228 229gid_t 230a_gid(char *s) 231{ 232 struct group *gr; 233 char *gname; 234 gid_t gid; 235 236 if ((gr = getgrnam(s)) != NULL) 237 gid = gr->gr_gid; 238 else { 239 for (gname = s; *s && isdigit(*s); ++s); 240 if (!*s) 241 gid = atoi(gname); 242 else 243 errx(EX_NOUSER, "unknown group id: %s", gname); 244 } 245 return (gid); 246} 247 248uid_t 249a_uid(char *s) 250{ 251 struct passwd *pw; 252 char *uname; 253 uid_t uid; 254 255 if ((pw = getpwnam(s)) != NULL) 256 uid = pw->pw_uid; 257 else { 258 for (uname = s; *s && isdigit(*s); ++s); 259 if (!*s) 260 uid = atoi(uname); 261 else 262 errx(EX_NOUSER, "unknown user id: %s", uname); 263 } 264 return (uid); 265} 266 267mode_t 268a_mask(char *s) 269{ 270 int done, rv; 271 char *ep; 272 273 done = 0; 274 rv = -1; 275 if (*s >= '0' && *s <= '7') { 276 done = 1; 277 rv = strtol(optarg, &ep, 8); 278 } 279 if (!done || rv < 0 || *ep) 280 errx(EX_USAGE, "invalid file mode: %s", s); 281 return (rv); 282} 283 284void 285usage(void) 286{ 287 fprintf(stderr, "%s\n%s\n%s\n", 288 "usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]", 289 " [-M mask] [-m mask] [-o options] [-u uid]", 290 " [-W table] special node"); 291 exit(EX_USAGE); 292} 293 294int 295set_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos) 296{ 297 int error; 298 299 if (modfind("msdosfs_iconv") < 0) 300 if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) { 301 warnx("cannot find or load \"msdosfs_iconv\" kernel module"); 302 return (-1); 303 } 304 305 build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE); 306 error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local); 307 if (error && errno != EEXIST) 308 return (-1); 309 if (cs_dos != NULL) { 310 error = kiconv_add_xlat16_cspairs(cs_dos, cs_local); 311 if (error && errno != EEXIST) 312 return (-1); 313 } else { 314 build_iovec_argf(iov, iovlen, "cs_dos", cs_local); 315 error = kiconv_add_xlat16_cspair(cs_local, cs_local, 316 KICONV_FROM_UPPER | KICONV_LOWER); 317 if (error && errno != EEXIST) 318 return (-1); 319 } 320 321 return (0); 322} 323