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 1.8 1994/07/16 21:32:08 cgd Exp $"; 33 #endif /* not lint */ 34 35 #include <sys/cdefs.h> 36 #include <sys/param.h> 37 #include <sys/mount.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <err.h> 41 #include <grp.h> 42 #include <pwd.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "mntopts.h" 49 50 struct mntopt mopts[] = { 51 MOPT_STDOPTS, 52 { NULL } 53 }; 54 55 gid_t a_gid __P((char *)); 56 uid_t a_uid __P((char *)); 57 mode_t a_mask __P((char *)); 58 void usage __P((void)); 59 60 int 61 main(argc, argv) 62 int argc; 63 char **argv; 64 { 65 struct msdosfs_args args; 66 struct stat sb; 67 int c, mntflags, set_gid, set_uid, set_mask; 68 char *dev, *dir, ndir[MAXPATHLEN+1]; 69 70 mntflags = set_gid = set_uid = set_mask = 0; 71 (void)memset(&args, '\0', sizeof(args)); 72 73 while ((c = getopt(argc, argv, "u:g:m:o:")) != EOF) { 74 switch (c) { 75 case 'u': 76 args.uid = a_uid(optarg); 77 set_uid = 1; 78 break; 79 case 'g': 80 args.gid = a_gid(optarg); 81 set_gid = 1; 82 break; 83 case 'm': 84 args.mask = a_mask(optarg); 85 set_mask = 1; 86 break; 87 case 'o': 88 getmntopts(optarg, mopts, &mntflags); 89 break; 90 case '?': 91 default: 92 usage(); 93 break; 94 } 95 } 96 97 if (optind + 2 != argc) 98 usage(); 99 100 dev = argv[optind]; 101 dir = argv[optind + 1]; 102 if (dir[0] != '/') { 103 warnx("\"%s\" is a relative path.", dir); 104 if (getcwd(ndir, sizeof(ndir)) == NULL) 105 err(1, "getcwd"); 106 strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1); 107 strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1); 108 dir = ndir; 109 warnx("using \"%s\" instead.", dir); 110 } 111 112 args.fspec = dev; 113 args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 114 if (mntflags & MNT_RDONLY) 115 args.export.ex_flags = MNT_EXRDONLY; 116 else 117 args.export.ex_flags = 0; 118 if (!set_gid || !set_uid || !set_mask) { 119 if (stat(dir, &sb) == -1) 120 err(1, "stat %s", dir); 121 122 if (!set_uid) 123 args.uid = sb.st_uid; 124 if (!set_gid) 125 args.gid = sb.st_gid; 126 if (!set_mask) 127 args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 128 } 129 130 if (mount(MOUNT_MSDOS, dir, mntflags, &args) < 0) 131 err(1, "mount"); 132 133 exit (0); 134 } 135 136 gid_t 137 a_gid(s) 138 char *s; 139 { 140 struct group *gr; 141 char *gname; 142 gid_t gid; 143 144 if ((gr = getgrnam(s)) != NULL) 145 gid = gr->gr_gid; 146 else { 147 for (gname = s; *s && isdigit(*s); ++s); 148 if (!*s) 149 gid = atoi(gname); 150 else 151 errx(1, "unknown group id: %s", gname); 152 } 153 return (gid); 154 } 155 156 uid_t 157 a_uid(s) 158 char *s; 159 { 160 struct passwd *pw; 161 char *uname; 162 uid_t uid; 163 164 if ((pw = getpwnam(s)) != NULL) 165 uid = pw->pw_uid; 166 else { 167 for (uname = s; *s && isdigit(*s); ++s); 168 if (!*s) 169 uid = atoi(uname); 170 else 171 errx(1, "unknown user id: %s", uname); 172 } 173 return (uid); 174 } 175 176 mode_t 177 a_mask(s) 178 char *s; 179 { 180 int done, rv; 181 char *ep; 182 183 done = 0; 184 if (*s >= '0' && *s <= '7') { 185 done = 1; 186 rv = strtol(optarg, &ep, 8); 187 } 188 if (!done || rv < 0 || *ep) 189 errx(1, "invalid file mode: %s", s); 190 return (rv); 191 } 192 193 void 194 usage() 195 { 196 fprintf(stderr, "usage: mount_msdos [-F flags] [-u user] [-g group] [-m mask] bdev dir\n"); 197 exit(1); 198 } 199