1 /* $OpenBSD: mount_msdos.c,v 1.12 1999/04/20 23:06:47 millert Exp $ */ 2 /* $NetBSD: mount_msdos.c,v 1.16 1996/10/24 00:12:50 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1994 Christopher G. Demetriou 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Christopher G. Demetriou. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char rcsid[] = "$OpenBSD: mount_msdos.c,v 1.12 1999/04/20 23:06:47 millert Exp $"; 36 #endif /* not lint */ 37 38 #include <sys/cdefs.h> 39 #include <sys/param.h> 40 #include <sys/mount.h> 41 #include <sys/stat.h> 42 #include <ctype.h> 43 #include <err.h> 44 #include <grp.h> 45 #include <pwd.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <errno.h> 51 52 #include "mntopts.h" 53 54 const struct mntopt mopts[] = { 55 MOPT_STDOPTS, 56 MOPT_UPDATE, 57 { NULL } 58 }; 59 60 gid_t a_gid __P((char *)); 61 uid_t a_uid __P((char *)); 62 mode_t a_mask __P((char *)); 63 void usage __P((void)); 64 65 int 66 main(argc, argv) 67 int argc; 68 char **argv; 69 { 70 struct msdosfs_args args; 71 struct stat sb; 72 int c, mntflags, set_gid, set_uid, set_mask; 73 char *dev, *dir, ndir[MAXPATHLEN+1]; 74 char *errcause; 75 76 mntflags = set_gid = set_uid = set_mask = 0; 77 (void)memset(&args, '\0', sizeof(args)); 78 79 while ((c = getopt(argc, argv, "Gsl9u:g:m:o:")) != -1) { 80 switch (c) { 81 case 'G': 82 args.flags |= MSDOSFSMNT_GEMDOSFS; 83 break; 84 case 's': 85 args.flags |= MSDOSFSMNT_SHORTNAME; 86 break; 87 case 'l': 88 args.flags |= MSDOSFSMNT_LONGNAME; 89 break; 90 case '9': 91 args.flags |= MSDOSFSMNT_NOWIN95; 92 break; 93 case 'u': 94 args.uid = a_uid(optarg); 95 set_uid = 1; 96 break; 97 case 'g': 98 args.gid = a_gid(optarg); 99 set_gid = 1; 100 break; 101 case 'm': 102 args.mask = a_mask(optarg); 103 set_mask = 1; 104 break; 105 case 'o': 106 getmntopts(optarg, mopts, &mntflags); 107 break; 108 case '?': 109 default: 110 usage(); 111 break; 112 } 113 } 114 115 if (optind + 2 != argc) 116 usage(); 117 118 dev = argv[optind]; 119 dir = argv[optind + 1]; 120 if (dir[0] != '/') { 121 warnx("\"%s\" is a relative path.", dir); 122 if (getcwd(ndir, sizeof(ndir)) == NULL) 123 err(1, "getcwd"); 124 strncat(ndir, "/", sizeof(ndir) - strlen(ndir)); 125 strncat(ndir, dir, sizeof(ndir) - strlen(ndir)); 126 dir = ndir; 127 warnx("using \"%s\" instead.", dir); 128 } 129 130 args.fspec = dev; 131 args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 132 if (mntflags & MNT_RDONLY) 133 args.export.ex_flags = MNT_EXRDONLY; 134 else 135 args.export.ex_flags = 0; 136 if (!set_gid || !set_uid || !set_mask) { 137 if (stat(dir, &sb) == -1) 138 err(1, "stat %s", dir); 139 140 if (!set_uid) 141 args.uid = sb.st_uid; 142 if (!set_gid) 143 args.gid = sb.st_gid; 144 if (!set_mask) 145 args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 146 } 147 148 if (mount(MOUNT_MSDOS, dir, mntflags, &args) < 0) { 149 switch (errno) { 150 case EOPNOTSUPP: 151 errcause = "filesystem not supported by kernel"; 152 break; 153 case EMFILE: 154 errcause = "mount table full"; 155 break; 156 case EINVAL: 157 errcause = 158 "not an MSDOS filesystem"; 159 break; 160 default: 161 errcause = strerror(errno); 162 break; 163 } 164 errx(1, "%s on %s: %s", args.fspec, dir, errcause); 165 } 166 167 exit (0); 168 } 169 170 gid_t 171 a_gid(s) 172 char *s; 173 { 174 struct group *gr; 175 char *gname; 176 gid_t gid; 177 178 if ((gr = getgrnam(s)) != NULL) 179 gid = gr->gr_gid; 180 else { 181 for (gname = s; *s && isdigit(*s); ++s); 182 if (!*s) 183 gid = atoi(gname); 184 else 185 errx(1, "unknown group id: %s", gname); 186 } 187 return (gid); 188 } 189 190 uid_t 191 a_uid(s) 192 char *s; 193 { 194 struct passwd *pw; 195 char *uname; 196 uid_t uid; 197 198 if ((pw = getpwnam(s)) != NULL) 199 uid = pw->pw_uid; 200 else { 201 for (uname = s; *s && isdigit(*s); ++s); 202 if (!*s) 203 uid = atoi(uname); 204 else 205 errx(1, "unknown user id: %s", uname); 206 } 207 return (uid); 208 } 209 210 mode_t 211 a_mask(s) 212 char *s; 213 { 214 int done, rv; 215 char *ep; 216 217 done = 0; 218 if (*s >= '0' && *s <= '7') { 219 done = 1; 220 rv = strtol(optarg, &ep, 8); 221 } 222 if (!done || rv < 0 || *ep) 223 errx(1, "invalid file mode: %s", s); 224 return (rv); 225 } 226 227 void 228 usage() 229 { 230 231 fprintf(stderr, "usage: mount_msdos [-o options] [-u user] [-g group] [-m mask] bdev dir\n"); 232 exit(1); 233 } 234