1 /* $NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char rcsid[] = 35 "$FreeBSD$"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/mount.h> 40 #include <sys/stat.h> 41 #include <sys/iconv.h> 42 #include <sys/linker.h> 43 #include <sys/module.h> 44 45 #include <ctype.h> 46 #include <err.h> 47 #include <grp.h> 48 #include <locale.h> 49 #include <pwd.h> 50 #include <stdio.h> 51 /* must be after stdio to declare fparseln */ 52 #include <libutil.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <sysexits.h> 56 #include <unistd.h> 57 58 #include "mntopts.h" 59 60 static gid_t a_gid(char *); 61 static uid_t a_uid(char *); 62 static mode_t a_mask(char *); 63 static void usage(void) __dead2; 64 static int set_charset(struct iovec **iov, int *iovlen, const char *, const char *); 65 66 int 67 main(int argc, char **argv) 68 { 69 struct iovec *iov = NULL; 70 int iovlen = 0; 71 struct stat sb; 72 int c, mntflags, set_gid, set_uid, set_mask, set_dirmask; 73 char *dev, *dir, mntpath[MAXPATHLEN], *csp; 74 char fstype[] = "msdosfs"; 75 char errmsg[255] = {0}; 76 char *cs_dos = NULL; 77 char *cs_local = NULL; 78 mode_t mask = 0, dirmask = 0; 79 uid_t uid = 0; 80 gid_t gid = 0; 81 getmnt_silent = 1; 82 83 mntflags = set_gid = set_uid = set_mask = set_dirmask = 0; 84 85 while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) { 86 switch (c) { 87 case 's': 88 build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1); 89 break; 90 case 'l': 91 build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1); 92 break; 93 case '9': 94 build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1); 95 break; 96 case 'u': 97 uid = a_uid(optarg); 98 set_uid = 1; 99 break; 100 case 'g': 101 gid = a_gid(optarg); 102 set_gid = 1; 103 break; 104 case 'm': 105 mask = a_mask(optarg); 106 set_mask = 1; 107 break; 108 case 'M': 109 dirmask = a_mask(optarg); 110 set_dirmask = 1; 111 break; 112 case 'L': { 113 const char *quirk = NULL; 114 if (setlocale(LC_CTYPE, optarg) == NULL) 115 err(EX_CONFIG, "%s", optarg); 116 csp = strchr(optarg,'.'); 117 if (!csp) 118 err(EX_CONFIG, "%s", optarg); 119 quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT); 120 build_iovec_argf(&iov, &iovlen, "cs_local", quirk); 121 cs_local = strdup(quirk); 122 } 123 break; 124 case 'D': 125 cs_dos = strdup(optarg); 126 build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 127 break; 128 case 'o': { 129 char *p = NULL; 130 char *val = strdup(""); 131 p = strchr(optarg, '='); 132 if (p != NULL) { 133 free(val); 134 *p = '\0'; 135 val = p + 1; 136 } 137 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 138 } 139 break; 140 case 'W': 141 if (strcmp(optarg, "iso22dos") == 0) { 142 cs_local = strdup("ISO8859-2"); 143 cs_dos = strdup("CP852"); 144 } else if (strcmp(optarg, "iso72dos") == 0) { 145 cs_local = strdup("ISO8859-7"); 146 cs_dos = strdup("CP737"); 147 } else if (strcmp(optarg, "koi2dos") == 0) { 148 cs_local = strdup("KOI8-R"); 149 cs_dos = strdup("CP866"); 150 } else if (strcmp(optarg, "koi8u2dos") == 0) { 151 cs_local = strdup("KOI8-U"); 152 cs_dos = strdup("CP866"); 153 } else { 154 err(EX_NOINPUT, "%s", optarg); 155 } 156 build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1); 157 build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1); 158 break; 159 case '?': 160 default: 161 usage(); 162 break; 163 } 164 } 165 166 if (optind + 2 != argc) 167 usage(); 168 169 if (set_mask && !set_dirmask) { 170 dirmask = mask; 171 set_dirmask = 1; 172 } 173 else if (set_dirmask && !set_mask) { 174 mask = dirmask; 175 set_mask = 1; 176 } 177 178 dev = argv[optind]; 179 dir = argv[optind + 1]; 180 181 if (cs_local != NULL) { 182 if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1) 183 err(EX_OSERR, "msdosfs_iconv"); 184 build_iovec_argf(&iov, &iovlen, "kiconv", ""); 185 } else if (cs_dos != NULL) { 186 build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1"); 187 if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1) 188 err(EX_OSERR, "msdosfs_iconv"); 189 build_iovec_argf(&iov, &iovlen, "kiconv", ""); 190 } 191 192 /* 193 * Resolve the mountpoint with realpath(3) and remove unnecessary 194 * slashes from the devicename if there are any. 195 */ 196 (void)checkpath(dir, mntpath); 197 (void)rmslashes(dev, dev); 198 199 if (!set_gid || !set_uid || !set_mask) { 200 if (stat(mntpath, &sb) == -1) 201 err(EX_OSERR, "stat %s", mntpath); 202 203 if (!set_uid) 204 uid = sb.st_uid; 205 if (!set_gid) 206 gid = sb.st_gid; 207 if (!set_mask) 208 mask = dirmask = 209 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 210 } 211 212 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 213 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 214 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1); 215 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 216 build_iovec_argf(&iov, &iovlen, "uid", "%d", uid); 217 build_iovec_argf(&iov, &iovlen, "gid", "%u", gid); 218 build_iovec_argf(&iov, &iovlen, "mask", "%u", mask); 219 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask); 220 221 if (nmount(iov, iovlen, mntflags) < 0) { 222 if (errmsg[0]) 223 err(1, "%s: %s", dev, errmsg); 224 else 225 err(1, "%s", dev); 226 } 227 228 exit (0); 229 } 230 231 gid_t 232 a_gid(s) 233 char *s; 234 { 235 struct group *gr; 236 char *gname; 237 gid_t gid; 238 239 if ((gr = getgrnam(s)) != NULL) 240 gid = gr->gr_gid; 241 else { 242 for (gname = s; *s && isdigit(*s); ++s); 243 if (!*s) 244 gid = atoi(gname); 245 else 246 errx(EX_NOUSER, "unknown group id: %s", gname); 247 } 248 return (gid); 249 } 250 251 uid_t 252 a_uid(s) 253 char *s; 254 { 255 struct passwd *pw; 256 char *uname; 257 uid_t uid; 258 259 if ((pw = getpwnam(s)) != NULL) 260 uid = pw->pw_uid; 261 else { 262 for (uname = s; *s && isdigit(*s); ++s); 263 if (!*s) 264 uid = atoi(uname); 265 else 266 errx(EX_NOUSER, "unknown user id: %s", uname); 267 } 268 return (uid); 269 } 270 271 mode_t 272 a_mask(s) 273 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() 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) 313 return (-1); 314 if (cs_dos != NULL) { 315 error = kiconv_add_xlat16_cspairs(cs_dos, cs_local); 316 if (error) 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) 323 return (-1); 324 } 325 326 return (0); 327 } 328