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 char rcsid[] = "$Id: mount_msdos.c,v 1.2 1994/09/22 22:16:35 wollman Exp $"; 33 #endif /* not lint */ 34 35 #include <sys/cdefs.h> 36 #include <sys/param.h> 37 #define MSDOSFS 38 #include <sys/mount.h> 39 #include <sys/stat.h> 40 #include <ctype.h> 41 #include <err.h> 42 #include <grp.h> 43 #include <pwd.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include "mntopts.h" 50 51 struct mntopt mopts[] = { 52 MOPT_STDOPTS, 53 { NULL } 54 }; 55 56 gid_t a_gid __P((char *)); 57 uid_t a_uid __P((char *)); 58 mode_t a_mask __P((char *)); 59 void usage __P((void)); 60 61 int 62 main(argc, argv) 63 int argc; 64 char **argv; 65 { 66 struct msdosfs_args args; 67 struct stat sb; 68 int c, mntflags, set_gid, set_uid, set_mask; 69 char *dev, *dir, ndir[MAXPATHLEN+1]; 70 struct vfsconf *vfc; 71 72 mntflags = set_gid = set_uid = set_mask = 0; 73 (void)memset(&args, '\0', sizeof(args)); 74 75 while ((c = getopt(argc, argv, "u:g:m:o:")) != EOF) { 76 switch (c) { 77 case 'u': 78 args.uid = a_uid(optarg); 79 set_uid = 1; 80 break; 81 case 'g': 82 args.gid = a_gid(optarg); 83 set_gid = 1; 84 break; 85 case 'm': 86 args.mask = a_mask(optarg); 87 set_mask = 1; 88 break; 89 case 'o': 90 getmntopts(optarg, mopts, &mntflags, 0); 91 break; 92 case '?': 93 default: 94 usage(); 95 break; 96 } 97 } 98 99 if (optind + 2 != argc) 100 usage(); 101 102 dev = argv[optind]; 103 dir = argv[optind + 1]; 104 if (dir[0] != '/') { 105 warnx("\"%s\" is a relative path.", dir); 106 if (getcwd(ndir, sizeof(ndir)) == NULL) 107 err(1, "getcwd"); 108 strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1); 109 strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1); 110 dir = ndir; 111 warnx("using \"%s\" instead.", dir); 112 } 113 114 args.fspec = dev; 115 args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 116 if (mntflags & MNT_RDONLY) 117 args.export.ex_flags = MNT_EXRDONLY; 118 else 119 args.export.ex_flags = 0; 120 if (!set_gid || !set_uid || !set_mask) { 121 if (stat(dir, &sb) == -1) 122 err(1, "stat %s", dir); 123 124 if (!set_uid) 125 args.uid = sb.st_uid; 126 if (!set_gid) 127 args.gid = sb.st_gid; 128 if (!set_mask) 129 args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 130 } 131 132 vfc = getvfsbyname("msdos"); 133 if(!vfc && vfsisloadable("msdos")) { 134 if(vfsload("msdos")) 135 err(1, "vfsload(msdos)"); 136 endvfsent(); /* clear cache */ 137 vfc = getvfsbyname("msdos"); 138 } 139 140 if (mount(vfc ? vfc->vfc_index : MOUNT_MSDOS, dir, mntflags, &args) < 0) 141 err(1, "mount"); 142 143 exit (0); 144 } 145 146 gid_t 147 a_gid(s) 148 char *s; 149 { 150 struct group *gr; 151 char *gname; 152 gid_t gid; 153 154 if ((gr = getgrnam(s)) != NULL) 155 gid = gr->gr_gid; 156 else { 157 for (gname = s; *s && isdigit(*s); ++s); 158 if (!*s) 159 gid = atoi(gname); 160 else 161 errx(1, "unknown group id: %s", gname); 162 } 163 return (gid); 164 } 165 166 uid_t 167 a_uid(s) 168 char *s; 169 { 170 struct passwd *pw; 171 char *uname; 172 uid_t uid; 173 174 if ((pw = getpwnam(s)) != NULL) 175 uid = pw->pw_uid; 176 else { 177 for (uname = s; *s && isdigit(*s); ++s); 178 if (!*s) 179 uid = atoi(uname); 180 else 181 errx(1, "unknown user id: %s", uname); 182 } 183 return (uid); 184 } 185 186 mode_t 187 a_mask(s) 188 char *s; 189 { 190 int done, rv; 191 char *ep; 192 193 done = 0; 194 if (*s >= '0' && *s <= '7') { 195 done = 1; 196 rv = strtol(optarg, &ep, 8); 197 } 198 if (!done || rv < 0 || *ep) 199 errx(1, "invalid file mode: %s", s); 200 return (rv); 201 } 202 203 void 204 usage() 205 { 206 fprintf(stderr, "usage: mount_msdos [-F flags] [-u user] [-g group] [-m mask] bdev dir\n"); 207 exit(1); 208 } 209