sbin/mount_msdos/mount_msdos.c

   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  * $DragonFly: src/sbin/mount_msdos/mount_msdos.c,v 1.7 2005/04/02 21:41:06 dillon Exp $
  34  */
  35
  36 #include <sys/param.h>
  37 #include <sys/mount.h>
  38 #include <sys/stat.h>
  39
  40 #include <vfs/msdosfs/msdosfsmount.h>
  41
  42 #include <ctype.h>
  43 #include <err.h>
  44 #include <grp.h>
  45 #include <locale.h>
  46 #include <pwd.h>
  47 #include <stdio.h>
  48 /* must be after stdio to declare fparseln */
  49 #include <libutil.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <sysexits.h>
  53 #include <unistd.h>
  54
  55 #include "mntopts.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 "-W".
  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 static void     load_u2wtable(struct msdosfs_args *, char *);
  80 static void     load_ultable(struct msdosfs_args *, char *);
  81
  82 int
  83 main(int argc, char **argv)
  84 {
  85         struct msdosfs_args args;
  86         struct stat sb;
  87         int c, error, mntflags, set_gid, set_uid, set_mask;
  88         char *dev, *dir, mntpath[MAXPATHLEN];
  89         struct vfsconf vfc;
  90
  91         mntflags = set_gid = set_uid = set_mask = 0;
  92         memset(&args, '\0', sizeof(args));
  93         args.magic = MSDOSFS_ARGSMAGIC;
  94
  95         while ((c = getopt(argc, argv, "sl9u:g:m:o:L:W:")) != -1) {
  96                 switch (c) {
  97 #ifdef MSDOSFSMNT_GEMDOSFS
  98                 case 'G':
  99                         args.flags |= MSDOSFSMNT_GEMDOSFS;
 100                         break;
 101 #endif
 102                 case 's':
 103                         args.flags |= MSDOSFSMNT_SHORTNAME;
 104                         break;
 105                 case 'l':
 106                         args.flags |= MSDOSFSMNT_LONGNAME;
 107                         break;
 108                 case '9':
 109                         args.flags |= MSDOSFSMNT_NOWIN95;
 110                         break;
 111                 case 'u':
 112                         args.uid = a_uid(optarg);
 113                         set_uid = 1;
 114                         break;
 115                 case 'g':
 116                         args.gid = a_gid(optarg);
 117                         set_gid = 1;
 118                         break;
 119                 case 'm':
 120                         args.mask = a_mask(optarg);
 121                         set_mask = 1;
 122                         break;
 123                 case 'L':
 124                         load_ultable(&args, optarg);
 125                         args.flags |= MSDOSFSMNT_ULTABLE;
 126                         break;
 127                 case 'W':
 128                         load_u2wtable(&args, optarg);
 129                         args.flags |= MSDOSFSMNT_U2WTABLE;
 130                         break;
 131                 case 'o':
 132                         getmntopts(optarg, mopts, &mntflags, &args.flags);
 133                         break;
 134                 case '?':
 135                 default:
 136                         usage();
 137                         break;
 138                 }
 139         }
 140
 141         if (optind + 2 != argc)
 142                 usage();
 143
 144         dev = argv[optind];
 145         dir = argv[optind + 1];
 146
 147         /*
 148          * Resolve the mountpoint with realpath(3) and remove unnecessary
 149          * slashes from the devicename if there are any.
 150          */
 151         checkpath(dir, mntpath);
 152         rmslashes(dev, dev);
 153
 154         args.fspec = dev;
 155         args.export.ex_root = -2;       /* unchecked anyway on DOS fs */
 156         if (mntflags & MNT_RDONLY)
 157                 args.export.ex_flags = MNT_EXRDONLY;
 158         else
 159                 args.export.ex_flags = 0;
 160         if (!set_gid || !set_uid || !set_mask) {
 161                 if (stat(mntpath, &sb) == -1)
 162                         err(EX_OSERR, "stat %s", mntpath);
 163
 164                 if (!set_uid)
 165                         args.uid = sb.st_uid;
 166                 if (!set_gid)
 167                         args.gid = sb.st_gid;
 168                 if (!set_mask)
 169                         args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
 170         }
 171
 172         error = getvfsbyname("msdos", &vfc);
 173         if (error && vfsisloadable("msdos")) {
 174                 if (vfsload("msdos"))
 175                         err(EX_OSERR, "vfsload(msdos)");
 176                 endvfsent();    /* clear cache */
 177                 error = getvfsbyname("msdos", &vfc);
 178         }
 179         if (error)
 180                 errx(EX_OSERR, "msdos filesystem is not available");
 181
 182         if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0)
 183                 err(EX_OSERR, "%s", dev);
 184
 185         exit (0);
 186 }
 187
 188 static gid_t
 189 a_gid(char *s)
 190 {
 191         struct group *gr;
 192         char *gname;
 193         gid_t gid;
 194
 195         if ((gr = getgrnam(s)) != NULL)
 196                 gid = gr->gr_gid;
 197         else {
 198                 for (gname = s; *s && isdigit(*s); ++s);
 199                 if (!*s)
 200                         gid = atoi(gname);
 201                 else
 202                         errx(EX_NOUSER, "unknown group id: %s", gname);
 203         }
 204         return (gid);
 205 }
 206
 207 static uid_t
 208 a_uid(char *s)
 209 {
 210         struct passwd *pw;
 211         char *uname;
 212         uid_t uid;
 213
 214         if ((pw = getpwnam(s)) != NULL)
 215                 uid = pw->pw_uid;
 216         else {
 217                 for (uname = s; *s && isdigit(*s); ++s);
 218                 if (!*s)
 219                         uid = atoi(uname);
 220                 else
 221                         errx(EX_NOUSER, "unknown user id: %s", uname);
 222         }
 223         return (uid);
 224 }
 225
 226 static mode_t
 227 a_mask(char *s)
 228 {
 229         int done, rv;
 230         char *ep;
 231
 232         done = 0;
 233         rv = -1;
 234         if (*s >= '0' && *s <= '7') {
 235                 done = 1;
 236                 rv = strtol(optarg, &ep, 8);
 237         }
 238         if (!done || rv < 0 || *ep)
 239                 errx(EX_USAGE, "invalid file mode: %s", s);
 240         return (rv);
 241 }
 242
 243 static void
 244 usage(void)
 245 {
 246         fprintf(stderr, "%s\n%s\n",
 247         "usage: mount_msdos [-o options] [-u user] [-g group] [-m mask]",
 248         "                   [-s] [-l] [-9] [-L locale] [-W table] bdev dir");
 249         exit(EX_USAGE);
 250 }
 251
 252 static void
 253 load_u2wtable (struct msdosfs_args *pargs, char *name)
 254 {
 255         FILE *f;
 256         int i, j, code[8];
 257         size_t line = 0;
 258         char buf[128];
 259         char *fn, *s, *p;
 260
 261         if (*name == '/')
 262                 fn = name;
 263         else {
 264                 snprintf(buf, sizeof(buf), "/usr/libdata/msdosfs/%s", name);
 265                 buf[127] = '\0';
 266                 fn = buf;
 267         }
 268         if ((f = fopen(fn, "r")) == NULL)
 269                 err(EX_NOINPUT, "%s", fn);
 270         p = NULL;
 271         for (i = 0; i < 16; i++) {
 272                 do {
 273                         if (p != NULL) free(p);
 274                         if ((p = s = fparseln(f, NULL, &line, NULL, 0)) == NULL)
 275                                 errx(EX_DATAERR, "can't read u2w table row %d near line %d", i, line);
 276                         while (isspace((unsigned char)*s))
 277                                 s++;
 278                 } while (*s == '\0');
 279                 if (sscanf(s, "%i%i%i%i%i%i%i%i",
 280 code, code + 1, code + 2, code + 3, code + 4, code + 5, code + 6, code + 7) != 8)
 281                         errx(EX_DATAERR, "u2w table: missing item(s) in row %d, line %d", i, line);
 282                 for (j = 0; j < 8; j++)
 283                         pargs->u2w[i * 8 + j] = code[j];
 284         }
 285         for (i = 0; i < 16; i++) {
 286                 do {
 287                         free(p);
 288                         if ((p = s = fparseln(f, NULL, &line, NULL, 0)) == NULL)
 289                                 errx(EX_DATAERR, "can't read d2u table row %d near line %d", i, line);
 290                         while (isspace((unsigned char)*s))
 291                                 s++;
 292                 } while (*s == '\0');
 293                 if (sscanf(s, "%i%i%i%i%i%i%i%i",
 294 code, code + 1, code + 2, code + 3, code + 4, code + 5, code + 6, code + 7) != 8)
 295                         errx(EX_DATAERR, "d2u table: missing item(s) in row %d, line %d", i, line);
 296                 for (j = 0; j < 8; j++)
 297                         pargs->d2u[i * 8 + j] = code[j];
 298         }
 299         for (i = 0; i < 16; i++) {
 300                 do {
 301                         free(p);
 302                         if ((p = s = fparseln(f, NULL, &line, NULL, 0)) == NULL)
 303                                 errx(EX_DATAERR, "can't read u2d table row %d near line %d", i, line);
 304                         while (isspace((unsigned char)*s))
 305                                 s++;
 306                 } while (*s == '\0');
 307                 if (sscanf(s, "%i%i%i%i%i%i%i%i",
 308 code, code + 1, code + 2, code + 3, code + 4, code + 5, code + 6, code + 7) != 8)
 309                         errx(EX_DATAERR, "u2d table: missing item(s) in row %d, line %d", i, line);
 310                 for (j = 0; j < 8; j++)
 311                         pargs->u2d[i * 8 + j] = code[j];
 312         }
 313         free(p);
 314         fclose(f);
 315 }
 316
 317 static void
 318 load_ultable (struct msdosfs_args *pargs, char *name)
 319 {
 320         int i;
 321
 322         if (setlocale(LC_CTYPE, name) == NULL)
 323                 err(EX_CONFIG, "%s", name);
 324         for (i = 0; i < 128; i++) {
 325                 pargs->ul[i] = tolower(i | 0x80);
 326                 pargs->lu[i] = toupper(i | 0x80);
 327         }
 328 }