mount_msdos.c revision 1.18
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 #include <sys/cdefs.h> 34 #ifndef lint 35 __RCSID("$NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem 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 51 #include "mntopts.h" 52 53 const struct mntopt mopts[] = { 54 MOPT_STDOPTS, 55 MOPT_UPDATE, 56 { NULL } 57 }; 58 59 gid_t a_gid __P((char *)); 60 uid_t a_uid __P((char *)); 61 mode_t a_mask __P((char *)); 62 int main __P((int, 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 75 mntflags = set_gid = set_uid = set_mask = 0; 76 (void)memset(&args, '\0', sizeof(args)); 77 78 while ((c = getopt(argc, argv, "Gsl9u:g:m:o:")) != -1) { 79 switch (c) { 80 case 'G': 81 args.flags |= MSDOSFSMNT_GEMDOSFS; 82 break; 83 case 's': 84 args.flags |= MSDOSFSMNT_SHORTNAME; 85 break; 86 case 'l': 87 args.flags |= MSDOSFSMNT_LONGNAME; 88 break; 89 case '9': 90 args.flags |= MSDOSFSMNT_NOWIN95; 91 break; 92 case 'u': 93 args.uid = a_uid(optarg); 94 set_uid = 1; 95 break; 96 case 'g': 97 args.gid = a_gid(optarg); 98 set_gid = 1; 99 break; 100 case 'm': 101 args.mask = a_mask(optarg); 102 set_mask = 1; 103 break; 104 case 'o': 105 getmntopts(optarg, mopts, &mntflags, 0); 106 break; 107 case '?': 108 default: 109 usage(); 110 break; 111 } 112 } 113 114 if (optind + 2 != argc) 115 usage(); 116 117 dev = argv[optind]; 118 dir = argv[optind + 1]; 119 if (dir[0] != '/') { 120 warnx("\"%s\" is a relative path.", dir); 121 if (getcwd(ndir, sizeof(ndir)) == NULL) 122 err(1, "getcwd"); 123 strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1); 124 strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1); 125 dir = ndir; 126 warnx("using \"%s\" instead.", dir); 127 } 128 129 args.fspec = dev; 130 args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 131 if (mntflags & MNT_RDONLY) 132 args.export.ex_flags = MNT_EXRDONLY; 133 else 134 args.export.ex_flags = 0; 135 if (!set_gid || !set_uid || !set_mask) { 136 if (stat(dir, &sb) == -1) 137 err(1, "stat %s", dir); 138 139 if (!set_uid) 140 args.uid = sb.st_uid; 141 if (!set_gid) 142 args.gid = sb.st_gid; 143 if (!set_mask) 144 args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 145 } 146 147 if (mount(MOUNT_MSDOS, dir, mntflags, &args) < 0) 148 err(1, "mount"); 149 150 exit (0); 151 } 152 153 gid_t 154 a_gid(s) 155 char *s; 156 { 157 struct group *gr; 158 char *gname; 159 gid_t gid; 160 161 if ((gr = getgrnam(s)) != NULL) 162 gid = gr->gr_gid; 163 else { 164 for (gname = s; *s && isdigit(*s); ++s); 165 if (!*s) 166 gid = atoi(gname); 167 else 168 errx(1, "unknown group id: %s", gname); 169 } 170 return (gid); 171 } 172 173 uid_t 174 a_uid(s) 175 char *s; 176 { 177 struct passwd *pw; 178 char *uname; 179 uid_t uid; 180 181 if ((pw = getpwnam(s)) != NULL) 182 uid = pw->pw_uid; 183 else { 184 for (uname = s; *s && isdigit(*s); ++s); 185 if (!*s) 186 uid = atoi(uname); 187 else 188 errx(1, "unknown user id: %s", uname); 189 } 190 return (uid); 191 } 192 193 mode_t 194 a_mask(s) 195 char *s; 196 { 197 int done, rv; 198 char *ep; 199 200 done = 0; 201 rv = -1; 202 if (*s >= '0' && *s <= '7') { 203 done = 1; 204 rv = strtol(optarg, &ep, 8); 205 } 206 if (!done || rv < 0 || *ep) 207 errx(1, "invalid file mode: %s", s); 208 return (rv); 209 } 210 211 void 212 usage() 213 { 214 215 fprintf(stderr, "usage: mount_msdos [-o options] [-u user] [-g group] [-m mask] bdev dir\n"); 216 exit(1); 217 } 218
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