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 #include <sys/param.h> 36 #include <sys/mount.h> 37 #include <sys/stat.h> 38 #include <sys/iconv.h> 39 #include <sys/linker.h> 40 #include <sys/module.h> 41 42 #include <ctype.h> 43 #include <err.h> 44 #include <errno.h> 45 #include <grp.h> 46 #include <locale.h> 47 #include <pwd.h> 48 #include <stdio.h> 49 /* must be after stdio to declare fparseln */ 50 #include <libutil.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <sysexits.h> 54 #include <unistd.h> 55 56 #include "mntopts.h" 57 58 static gid_t a_gid(char *); 59 static uid_t a_uid(char *); 60 static mode_t a_mask(char *); 61 static void usage(void) __dead2; 62 static int set_charset(struct iovec **iov, int *iovlen, const char *, const char *); 63 64 int 65 main(int argc, char **argv) 66 { 67 struct iovec *iov = NULL; 68 int iovlen = 0; 69 struct stat sb; 70 int c, set_gid, set_uid, set_mask, set_dirmask; 71 char *dev, *dir, mntpath[MAXPATHLEN], *csp; 72 char fstype[] = "msdosfs"; 73 char errmsg[255] = {0}; 74 char *cs_dos = NULL; 75 char *cs_local = NULL; 76 mode_t mask = 0, dirmask = 0; 77 uid_t uid = 0; 78 gid_t gid = 0; 79 80 set_gid = set_uid = set_mask = set_dirmask = 0; 81 82 while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) { 83 switch (c) { 84 case 's': 85 build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1); 86 break; 87 case 'l': 88 build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1); 89 break; 90 case '9': 91 build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1); 92 break; 93 case 'u': 94 uid = a_uid(optarg); 95 set_uid = 1; 96 break; 97 case 'g': 98 gid = a_gid(optarg); 99 set_gid = 1; 100 break; 101 case 'm': 102 mask = a_mask(optarg); 103 set_mask = 1; 104 break; 105 case 'M': 106 dirmask = a_mask(optarg); 107 set_dirmask = 1; 108 break; 109 case 'L': { 110 const char *quirk = NULL; 111 if (setlocale(LC_CTYPE, optarg) == NULL) 112 err(EX_CONFIG, "%s", optarg); 113 csp = strchr(optarg,'.'); 114 if (!csp) 115 err(EX_CONFIG, "%s", optarg); 116 quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT); 117 build_iovec_argf(&iov, &iovlen, "cs_local", quirk); 118 cs_local = strdup(quirk); 119 } 120 break; 121 case 'D': 122 cs_dos = strdup(optarg); 123 build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 124 break; 125 case 'o': { 126 char *p = NULL; 127 char *val = strdup(""); 128 p = strchr(optarg, '='); 129 if (p != NULL) { 130 free(val); 131 *p = '\0'; 132 val = p + 1; 133 } 134 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 135 } 136 break; 137 case 'W': 138 if (strcmp(optarg, "iso22dos") == 0) { 139 cs_local = strdup("ISO8859-2"); 140 cs_dos = strdup("CP852"); 141 } else if (strcmp(optarg, "iso72dos") == 0) { 142 cs_local = strdup("ISO8859-7"); 143 cs_dos = strdup("CP737"); 144 } else if (strcmp(optarg, "koi2dos") == 0) { 145 cs_local = strdup("KOI8-R"); 146 cs_dos = strdup("CP866"); 147 } else if (strcmp(optarg, "koi8u2dos") == 0) { 148 cs_local = strdup("KOI8-U"); 149 cs_dos = strdup("CP866"); 150 } else { 151 err(EX_NOINPUT, "%s", optarg); 152 } 153 build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1); 154 build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 155 break; 156 case '?': 157 default: 158 usage(); 159 break; 160 } 161 } 162 163 if (optind + 2 != argc) 164 usage(); 165 166 if (set_mask && !set_dirmask) { 167 dirmask = mask; 168 set_dirmask = 1; 169 } 170 else if (set_dirmask && !set_mask) { 171 mask = dirmask; 172 set_mask = 1; 173 } 174 175 dev = argv[optind]; 176 dir = argv[optind + 1]; 177 178 if (cs_local != NULL) { 179 if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1) 180 err(EX_OSERR, "msdosfs_iconv"); 181 build_iovec_argf(&iov, &iovlen, "kiconv", ""); 182 } else if (cs_dos != NULL) { 183 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 } 228 229 gid_t 230 a_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 } 247 248 uid_t 249 a_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 } 266 267 mode_t 268 a_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 } 283 284 void 285 usage(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 } 293 294 int 295 set_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