1 /* $NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-4-Clause 5 * 6 * Copyright (c) 1994 Christopher G. Demetriou 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Christopher G. Demetriou. 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 35 #ifndef lint 36 static const char rcsid[] = 37 "$FreeBSD$"; 38 #endif /* not lint */ 39 40 #include <sys/param.h> 41 #include <sys/mount.h> 42 #include <sys/stat.h> 43 #include <sys/iconv.h> 44 #include <sys/linker.h> 45 #include <sys/module.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <grp.h> 51 #include <locale.h> 52 #include <pwd.h> 53 #include <stdio.h> 54 /* must be after stdio to declare fparseln */ 55 #include <libutil.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <sysexits.h> 59 #include <unistd.h> 60 61 #include "mntopts.h" 62 63 static gid_t a_gid(char *); 64 static uid_t a_uid(char *); 65 static mode_t a_mask(char *); 66 static void usage(void) __dead2; 67 static int set_charset(struct iovec **iov, int *iovlen, const char *, const char *); 68 69 int 70 main(int argc, char **argv) 71 { 72 struct iovec *iov = NULL; 73 int iovlen = 0; 74 struct stat sb; 75 int c, set_gid, set_uid, set_mask, set_dirmask; 76 char *dev, *dir, mntpath[MAXPATHLEN], *csp; 77 char fstype[] = "msdosfs"; 78 char errmsg[255] = {0}; 79 char *cs_dos = NULL; 80 char *cs_local = NULL; 81 mode_t mask = 0, dirmask = 0; 82 uid_t uid = 0; 83 gid_t gid = 0; 84 85 set_gid = set_uid = set_mask = set_dirmask = 0; 86 87 while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) { 88 switch (c) { 89 case 's': 90 build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1); 91 break; 92 case 'l': 93 build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1); 94 break; 95 case '9': 96 build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1); 97 break; 98 case 'u': 99 uid = a_uid(optarg); 100 set_uid = 1; 101 break; 102 case 'g': 103 gid = a_gid(optarg); 104 set_gid = 1; 105 break; 106 case 'm': 107 mask = a_mask(optarg); 108 set_mask = 1; 109 break; 110 case 'M': 111 dirmask = a_mask(optarg); 112 set_dirmask = 1; 113 break; 114 case 'L': { 115 const char *quirk = NULL; 116 if (setlocale(LC_CTYPE, optarg) == NULL) 117 err(EX_CONFIG, "%s", optarg); 118 csp = strchr(optarg,'.'); 119 if (!csp) 120 err(EX_CONFIG, "%s", optarg); 121 quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT); 122 build_iovec_argf(&iov, &iovlen, "cs_local", quirk); 123 cs_local = strdup(quirk); 124 } 125 break; 126 case 'D': 127 cs_dos = strdup(optarg); 128 build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 129 break; 130 case 'o': { 131 char *p = NULL; 132 char *val = strdup(""); 133 p = strchr(optarg, '='); 134 if (p != NULL) { 135 free(val); 136 *p = '\0'; 137 val = p + 1; 138 } 139 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 140 } 141 break; 142 case 'W': 143 if (strcmp(optarg, "iso22dos") == 0) { 144 cs_local = strdup("ISO8859-2"); 145 cs_dos = strdup("CP852"); 146 } else if (strcmp(optarg, "iso72dos") == 0) { 147 cs_local = strdup("ISO8859-7"); 148 cs_dos = strdup("CP737"); 149 } else if (strcmp(optarg, "koi2dos") == 0) { 150 cs_local = strdup("KOI8-R"); 151 cs_dos = strdup("CP866"); 152 } else if (strcmp(optarg, "koi8u2dos") == 0) { 153 cs_local = strdup("KOI8-U"); 154 cs_dos = strdup("CP866"); 155 } else { 156 err(EX_NOINPUT, "%s", optarg); 157 } 158 build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1); 159 build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 160 break; 161 case '?': 162 default: 163 usage(); 164 break; 165 } 166 } 167 168 if (optind + 2 != argc) 169 usage(); 170 171 if (set_mask && !set_dirmask) { 172 dirmask = mask; 173 set_dirmask = 1; 174 } 175 else if (set_dirmask && !set_mask) { 176 mask = dirmask; 177 set_mask = 1; 178 } 179 180 dev = argv[optind]; 181 dir = argv[optind + 1]; 182 183 if (cs_local != NULL) { 184 if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1) 185 err(EX_OSERR, "msdosfs_iconv"); 186 build_iovec_argf(&iov, &iovlen, "kiconv", ""); 187 } else if (cs_dos != NULL) { 188 build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1"); 189 if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1) 190 err(EX_OSERR, "msdosfs_iconv"); 191 build_iovec_argf(&iov, &iovlen, "kiconv", ""); 192 } 193 194 /* 195 * Resolve the mountpoint with realpath(3) and remove unnecessary 196 * slashes from the devicename if there are any. 197 */ 198 if (checkpath(dir, mntpath) != 0) 199 err(EX_USAGE, "%s", mntpath); 200 (void)rmslashes(dev, dev); 201 202 if (!set_gid || !set_uid || !set_mask) { 203 if (stat(mntpath, &sb) == -1) 204 err(EX_OSERR, "stat %s", mntpath); 205 206 if (!set_uid) 207 uid = sb.st_uid; 208 if (!set_gid) 209 gid = sb.st_gid; 210 if (!set_mask) 211 mask = dirmask = 212 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 213 } 214 215 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 216 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 217 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1); 218 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 219 build_iovec_argf(&iov, &iovlen, "uid", "%d", uid); 220 build_iovec_argf(&iov, &iovlen, "gid", "%u", gid); 221 build_iovec_argf(&iov, &iovlen, "mask", "%u", mask); 222 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask); 223 224 if (nmount(iov, iovlen, 0) < 0) { 225 if (errmsg[0]) 226 err(1, "%s: %s", dev, errmsg); 227 else 228 err(1, "%s", dev); 229 } 230 231 exit (0); 232 } 233 234 gid_t 235 a_gid(char *s) 236 { 237 struct group *gr; 238 char *gname; 239 gid_t gid; 240 241 if ((gr = getgrnam(s)) != NULL) 242 gid = gr->gr_gid; 243 else { 244 for (gname = s; *s && isdigit(*s); ++s); 245 if (!*s) 246 gid = atoi(gname); 247 else 248 errx(EX_NOUSER, "unknown group id: %s", gname); 249 } 250 return (gid); 251 } 252 253 uid_t 254 a_uid(char *s) 255 { 256 struct passwd *pw; 257 char *uname; 258 uid_t uid; 259 260 if ((pw = getpwnam(s)) != NULL) 261 uid = pw->pw_uid; 262 else { 263 for (uname = s; *s && isdigit(*s); ++s); 264 if (!*s) 265 uid = atoi(uname); 266 else 267 errx(EX_NOUSER, "unknown user id: %s", uname); 268 } 269 return (uid); 270 } 271 272 mode_t 273 a_mask(char *s) 274 { 275 int done, rv; 276 char *ep; 277 278 done = 0; 279 rv = -1; 280 if (*s >= '0' && *s <= '7') { 281 done = 1; 282 rv = strtol(optarg, &ep, 8); 283 } 284 if (!done || rv < 0 || *ep) 285 errx(EX_USAGE, "invalid file mode: %s", s); 286 return (rv); 287 } 288 289 void 290 usage(void) 291 { 292 fprintf(stderr, "%s\n%s\n%s\n", 293 "usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]", 294 " [-M mask] [-m mask] [-o options] [-u uid]", 295 " [-W table] special node"); 296 exit(EX_USAGE); 297 } 298 299 int 300 set_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos) 301 { 302 int error; 303 304 if (modfind("msdosfs_iconv") < 0) 305 if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) { 306 warnx("cannot find or load \"msdosfs_iconv\" kernel module"); 307 return (-1); 308 } 309 310 build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE); 311 error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local); 312 if (error && errno != EEXIST) 313 return (-1); 314 if (cs_dos != NULL) { 315 error = kiconv_add_xlat16_cspairs(cs_dos, cs_local); 316 if (error && errno != EEXIST) 317 return (-1); 318 } else { 319 build_iovec_argf(iov, iovlen, "cs_dos", cs_local); 320 error = kiconv_add_xlat16_cspair(cs_local, cs_local, 321 KICONV_FROM_UPPER | KICONV_LOWER); 322 if (error && errno != EEXIST) 323 return (-1); 324 } 325 326 return (0); 327 } 328