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 * $FreeBSD: src/sbin/mount_msdos/mount_msdos.c,v 1.19.2.1 2000/07/20 10:35:13 kris Exp $ 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 #include <vfs/msdosfs/msdosfsmount.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <grp.h> 46 #include <locale.h> 47 #include <mntopts.h> 48 #include <pwd.h> 49 #include <stdio.h> 50 /* must be after stdio to declare fparseln */ 51 #include <libutil.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <sysexits.h> 55 #include <unistd.h> 56 57 /* 58 * XXX - no way to specify "foo=<bar>"-type options; that's what we'd 59 * want for "-u", "-g", "-m", "-L", and "-D". 60 */ 61 static struct mntopt mopts[] = { 62 MOPT_STDOPTS, 63 MOPT_FORCE, 64 MOPT_SYNC, 65 MOPT_UPDATE, 66 #ifdef MSDOSFSMNT_GEMDOSFS 67 { "gemdosfs", 0, MSDOSFSMNT_GEMDOSFS, 1 }, 68 #endif 69 { "shortnames", 0, MSDOSFSMNT_SHORTNAME, 1 }, 70 { "longnames", 0, MSDOSFSMNT_LONGNAME, 1 }, 71 { "nowin95", 0, MSDOSFSMNT_NOWIN95, 1 }, 72 MOPT_NULL 73 }; 74 75 static gid_t a_gid(char *); 76 static uid_t a_uid(char *); 77 static mode_t a_mask(char *); 78 static void usage(void) __dead2; 79 int set_charset(struct msdosfs_args*, const char*, const char*); 80 81 int 82 main(int argc, char **argv) 83 { 84 struct msdosfs_args args; 85 struct stat sb; 86 int c, error, mntflags, set_gid, set_uid, set_mask; 87 char *dev, *dir, mntpath[MAXPATHLEN], *csp; 88 const char *quirk = NULL; 89 char *cs_local = NULL; 90 char *cs_dos = NULL; 91 struct vfsconf vfc; 92 mntflags = set_gid = set_uid = set_mask = 0; 93 memset(&args, '\0', sizeof(args)); 94 args.magic = MSDOSFS_ARGSMAGIC; 95 96 while ((c = getopt(argc, argv, "sl9u:g:m:o:L:D:")) != -1) { 97 switch (c) { 98 #ifdef MSDOSFSMNT_GEMDOSFS 99 case 'G': 100 args.flags |= MSDOSFSMNT_GEMDOSFS; 101 break; 102 #endif 103 case 's': 104 args.flags |= MSDOSFSMNT_SHORTNAME; 105 break; 106 case 'l': 107 args.flags |= MSDOSFSMNT_LONGNAME; 108 break; 109 case '9': 110 args.flags |= MSDOSFSMNT_NOWIN95; 111 break; 112 case 'u': 113 args.uid = a_uid(optarg); 114 set_uid = 1; 115 break; 116 case 'g': 117 args.gid = a_gid(optarg); 118 set_gid = 1; 119 break; 120 case 'm': 121 args.mask = a_mask(optarg); 122 set_mask = 1; 123 break; 124 case 'L': 125 if (setlocale(LC_CTYPE, optarg) == NULL) 126 err(EX_CONFIG, "%s", optarg); 127 csp = strchr(optarg,'.'); 128 if (!csp) 129 err(EX_CONFIG, "%s", optarg); 130 quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT); 131 cs_local = strdup(quirk); 132 args.flags |= MSDOSFSMNT_KICONV; 133 break; 134 case 'D': 135 csp = optarg; 136 cs_dos = strdup(optarg); 137 args.flags |= MSDOSFSMNT_KICONV; 138 break; 139 case 'o': 140 getmntopts(optarg, mopts, &mntflags, &args.flags); 141 break; 142 case '?': 143 default: 144 usage(); 145 break; 146 } 147 } 148 149 if (optind + 2 != argc) 150 usage(); 151 152 dev = argv[optind]; 153 dir = argv[optind + 1]; 154 155 /* 156 * Resolve the mountpoint with realpath(3) and remove unnecessary 157 * slashes from the devicename if there are any. 158 */ 159 checkpath(dir, mntpath); 160 rmslashes(dev, dev); 161 162 args.fspec = dev; 163 args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 164 165 if (cs_local != NULL) { 166 if (set_charset(&args, cs_local, cs_dos) == -1) 167 err(EX_OSERR, "msdos_iconv"); 168 } else if (cs_dos != NULL) { 169 if (set_charset(&args, "ISO8859-1", cs_dos) == -1) 170 err(EX_OSERR, "msdos_iconv"); 171 } 172 173 if (mntflags & MNT_RDONLY) 174 args.export.ex_flags = MNT_EXRDONLY; 175 else 176 args.export.ex_flags = 0; 177 if (!set_gid || !set_uid || !set_mask) { 178 if (stat(mntpath, &sb) == -1) 179 err(EX_OSERR, "stat %s", mntpath); 180 181 if (!set_uid) 182 args.uid = sb.st_uid; 183 if (!set_gid) 184 args.gid = sb.st_gid; 185 if (!set_mask) 186 args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 187 } 188 189 error = getvfsbyname("msdos", &vfc); 190 if (error && vfsisloadable("msdos")) { 191 if (vfsload("msdos")) 192 err(EX_OSERR, "vfsload(msdos)"); 193 endvfsent(); /* clear cache */ 194 error = getvfsbyname("msdos", &vfc); 195 } 196 if (error) 197 errx(EX_OSERR, "msdos filesystem is not available"); 198 199 if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0) 200 err(EX_OSERR, "%s", dev); 201 202 exit (0); 203 } 204 205 static gid_t 206 a_gid(char *s) 207 { 208 struct group *gr; 209 char *gname; 210 gid_t gid; 211 212 if ((gr = getgrnam(s)) != NULL) 213 gid = gr->gr_gid; 214 else { 215 for (gname = s; *s && isdigit(*s); ++s); 216 if (!*s) 217 gid = atoi(gname); 218 else 219 errx(EX_NOUSER, "unknown group id: %s", gname); 220 } 221 return (gid); 222 } 223 224 static uid_t 225 a_uid(char *s) 226 { 227 struct passwd *pw; 228 char *uname; 229 uid_t uid; 230 231 if ((pw = getpwnam(s)) != NULL) 232 uid = pw->pw_uid; 233 else { 234 for (uname = s; *s && isdigit(*s); ++s); 235 if (!*s) 236 uid = atoi(uname); 237 else 238 errx(EX_NOUSER, "unknown user id: %s", uname); 239 } 240 return (uid); 241 } 242 243 static mode_t 244 a_mask(char *s) 245 { 246 int done, rv; 247 char *ep; 248 249 done = 0; 250 rv = -1; 251 if (*s >= '0' && *s <= '7') { 252 done = 1; 253 rv = strtol(optarg, &ep, 8); 254 } 255 if (!done || rv < 0 || *ep) 256 errx(EX_USAGE, "invalid file mode: %s", s); 257 return (rv); 258 } 259 260 static void 261 usage(void) 262 { 263 fprintf(stderr, "%s\n%s\n", 264 "usage: mount_msdos [-o options] [-u user] [-g group] [-m mask]", 265 " [-s] [-l] [-9] [-L locale] [-D codepage] bdev dir"); 266 exit(EX_USAGE); 267 } 268 269 int 270 set_charset(struct msdosfs_args *args, const char *cs_local, const char *cs_dos) 271 { 272 int error; 273 if (modfind("msdos_iconv") < 0) { 274 if (kldload("msdos_iconv") < 0 || modfind("msdos_iconv") < 0) 275 { 276 warnx("cannot find or load \"msdos_iconv\" kernel module"); 277 return (-1); 278 } 279 } 280 snprintf(args->cs_local, ICONV_CSNMAXLEN, "%s", cs_local); 281 error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local); 282 if (error) 283 return (-1); 284 if (!cs_dos) 285 cs_dos = strdup("CP437"); 286 snprintf(args->cs_dos, ICONV_CSNMAXLEN, "%s", cs_dos); 287 error = kiconv_add_xlat16_cspairs(cs_dos, cs_local); 288 if (error) 289 return (-1); 290 return (0); 291 } 292