mount_msdos.c revision 1.20
1 /* $NetBSD: mount_msdos.c,v 1.20 1999/06/25 19:28:36 perseant 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 1.20 1999/06/25 19:28:36 perseant 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 <msdosfs/msdosfsmount.h> 43 #include <ctype.h> 44 #include <err.h> 45 #include <grp.h> 46 #include <pwd.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.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 int main __P((int, char *[])); 64 void usage __P((void)); 65 66 int 67 main(argc, argv) 68 int argc; 69 char **argv; 70 { 71 struct msdosfs_args args; 72 struct stat sb; 73 int c, mntflags, set_gid, set_uid, set_mask; 74 char *dev, *dir, ndir[MAXPATHLEN+1]; 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, 0); 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) - 1); 125 strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1); 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 err(1, "%s on %s", dev, dir); 150 151 exit (0); 152 } 153 154 gid_t 155 a_gid(s) 156 char *s; 157 { 158 struct group *gr; 159 char *gname; 160 gid_t gid; 161 162 if ((gr = getgrnam(s)) != NULL) 163 gid = gr->gr_gid; 164 else { 165 for (gname = s; *s && isdigit(*s); ++s); 166 if (!*s) 167 gid = atoi(gname); 168 else 169 errx(1, "unknown group id: %s", gname); 170 } 171 return (gid); 172 } 173 174 uid_t 175 a_uid(s) 176 char *s; 177 { 178 struct passwd *pw; 179 char *uname; 180 uid_t uid; 181 182 if ((pw = getpwnam(s)) != NULL) 183 uid = pw->pw_uid; 184 else { 185 for (uname = s; *s && isdigit(*s); ++s); 186 if (!*s) 187 uid = atoi(uname); 188 else 189 errx(1, "unknown user id: %s", uname); 190 } 191 return (uid); 192 } 193 194 mode_t 195 a_mask(s) 196 char *s; 197 { 198 int done, rv; 199 char *ep; 200 201 done = 0; 202 rv = -1; 203 if (*s >= '0' && *s <= '7') { 204 done = 1; 205 rv = strtol(optarg, &ep, 8); 206 } 207 if (!done || rv < 0 || *ep) 208 errx(1, "invalid file mode: %s", s); 209 return (rv); 210 } 211 212 void 213 usage() 214 { 215 216 fprintf(stderr, "usage: mount_msdos [-o options] [-u user] [-g group] [-m mask] bdev dir\n"); 217 exit(1); 218 } 219
Indexes created Fri Sep 26 08:10:20 GMT 2025