1 /* 2 * Copyright (c) 1994 Christopher G. Demetriou 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Christopher G. Demetriou. 16 * 4. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef lint 32 static const char rcsid[] = 33 "$Id: mount_msdos.c,v 1.7 1997/02/22 14:32:30 peter Exp $"; 34 #endif /* not lint */ 35 36 #include <sys/param.h> 37 #include <sys/mount.h> 38 #include <sys/stat.h> 39 40 #include <msdosfs/msdosfsmount.h> 41 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 <sysexits.h> 50 #include <unistd.h> 51 52 #include "mntopts.h" 53 54 static struct mntopt mopts[] = { 55 MOPT_STDOPTS, 56 { NULL } 57 }; 58 59 static gid_t a_gid __P((char *)); 60 static uid_t a_uid __P((char *)); 61 static mode_t a_mask __P((char *)); 62 static void usage __P((void)) __dead2; 63 64 int 65 main(argc, argv) 66 int argc; 67 char **argv; 68 { 69 struct msdosfs_args args; 70 struct stat sb; 71 int c, error, mntflags, set_gid, set_uid, set_mask; 72 char *dev, *dir, ndir[MAXPATHLEN+1]; 73 struct vfsconf vfc; 74 75 mntflags = set_gid = set_uid = set_mask = 0; 76 (void)memset(&args, '\0', sizeof(args)); 77 78 while ((c = getopt(argc, argv, "u:g:m:o:")) != EOF) { 79 switch (c) { 80 case 'u': 81 args.uid = a_uid(optarg); 82 set_uid = 1; 83 break; 84 case 'g': 85 args.gid = a_gid(optarg); 86 set_gid = 1; 87 break; 88 case 'm': 89 args.mask = a_mask(optarg); 90 set_mask = 1; 91 break; 92 case 'o': 93 getmntopts(optarg, mopts, &mntflags, 0); 94 break; 95 case '?': 96 default: 97 usage(); 98 break; 99 } 100 } 101 102 if (optind + 2 != argc) 103 usage(); 104 105 dev = argv[optind]; 106 dir = argv[optind + 1]; 107 if (dir[0] != '/') { 108 warnx("\"%s\" is a relative path", dir); 109 if (getcwd(ndir, sizeof(ndir)) == NULL) 110 err(EX_OSERR, "getcwd"); 111 strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1); 112 strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1); 113 dir = ndir; 114 warnx("using \"%s\" instead", dir); 115 } 116 117 args.fspec = dev; 118 args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 119 if (mntflags & MNT_RDONLY) 120 args.export.ex_flags = MNT_EXRDONLY; 121 else 122 args.export.ex_flags = 0; 123 if (!set_gid || !set_uid || !set_mask) { 124 if (stat(dir, &sb) == -1) 125 err(EX_OSERR, "stat %s", dir); 126 127 if (!set_uid) 128 args.uid = sb.st_uid; 129 if (!set_gid) 130 args.gid = sb.st_gid; 131 if (!set_mask) 132 args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 133 } 134 135 error = getvfsbyname("msdos", &vfc); 136 if (error && vfsisloadable("msdos")) { 137 if (vfsload("msdos")) 138 err(EX_OSERR, "vfsload(msdos)"); 139 endvfsent(); /* clear cache */ 140 error = getvfsbyname("msdos", &vfc); 141 } 142 if (error) 143 errx(EX_OSERR, "msdos filesystem is not available"); 144 145 if (mount(vfc.vfc_name, dir, mntflags, &args) < 0) 146 err(EX_OSERR, "%s", dev); 147 148 exit (0); 149 } 150 151 gid_t 152 a_gid(s) 153 char *s; 154 { 155 struct group *gr; 156 char *gname; 157 gid_t gid; 158 159 if ((gr = getgrnam(s)) != NULL) 160 gid = gr->gr_gid; 161 else { 162 for (gname = s; *s && isdigit(*s); ++s); 163 if (!*s) 164 gid = atoi(gname); 165 else 166 errx(EX_NOUSER, "unknown group id: %s", gname); 167 } 168 return (gid); 169 } 170 171 uid_t 172 a_uid(s) 173 char *s; 174 { 175 struct passwd *pw; 176 char *uname; 177 uid_t uid; 178 179 if ((pw = getpwnam(s)) != NULL) 180 uid = pw->pw_uid; 181 else { 182 for (uname = s; *s && isdigit(*s); ++s); 183 if (!*s) 184 uid = atoi(uname); 185 else 186 errx(EX_NOUSER, "unknown user id: %s", uname); 187 } 188 return (uid); 189 } 190 191 mode_t 192 a_mask(s) 193 char *s; 194 { 195 int done, rv; 196 char *ep; 197 198 done = 0; 199 if (*s >= '0' && *s <= '7') { 200 done = 1; 201 rv = strtol(optarg, &ep, 8); 202 } 203 if (!done || rv < 0 || *ep) 204 errx(EX_USAGE, "invalid file mode: %s", s); 205 return (rv); 206 } 207 208 void 209 usage() 210 { 211 fprintf(stderr, "usage: mount_msdos [-F flags] [-u user] [-g group] [-m mask] bdev dir\n"); 212 exit(EX_USAGE); 213 } 214