mount_msdosfs.c revision 15771
12892Sdfr/* 22892Sdfr * Copyright (c) 1994 Christopher G. Demetriou 32892Sdfr * All rights reserved. 42892Sdfr * 52892Sdfr * Redistribution and use in source and binary forms, with or without 62892Sdfr * modification, are permitted provided that the following conditions 72892Sdfr * are met: 82892Sdfr * 1. Redistributions of source code must retain the above copyright 92892Sdfr * notice, this list of conditions and the following disclaimer. 102892Sdfr * 2. Redistributions in binary form must reproduce the above copyright 112892Sdfr * notice, this list of conditions and the following disclaimer in the 122892Sdfr * documentation and/or other materials provided with the distribution. 132892Sdfr * 3. All advertising materials mentioning features or use of this software 142892Sdfr * must display the following acknowledgement: 152892Sdfr * This product includes software developed by Christopher G. Demetriou. 162892Sdfr * 4. The name of the author may not be used to endorse or promote products 172892Sdfr * derived from this software without specific prior written permission 182892Sdfr * 192892Sdfr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 202892Sdfr * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 212892Sdfr * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 222892Sdfr * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 232892Sdfr * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 242892Sdfr * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 252892Sdfr * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 262892Sdfr * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 272892Sdfr * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 282892Sdfr * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 292892Sdfr */ 302892Sdfr 312892Sdfr#ifndef lint 3215771Swollmanstatic const char rcsid[] = 3315771Swollman "$Id: mount_msdos.c,v 1.3 1994/11/01 23:51:42 wollman Exp $"; 342892Sdfr#endif /* not lint */ 352892Sdfr 362892Sdfr#include <sys/cdefs.h> 372892Sdfr#include <sys/param.h> 382892Sdfr#define MSDOSFS 392892Sdfr#include <sys/mount.h> 402892Sdfr#include <sys/stat.h> 412892Sdfr#include <ctype.h> 422892Sdfr#include <err.h> 432892Sdfr#include <grp.h> 442892Sdfr#include <pwd.h> 452892Sdfr#include <stdio.h> 462892Sdfr#include <stdlib.h> 472892Sdfr#include <string.h> 4815771Swollman#include <sysexits.h> 492892Sdfr#include <unistd.h> 502892Sdfr 512892Sdfr#include "mntopts.h" 522892Sdfr 5315771Swollmanstatic struct mntopt mopts[] = { 542892Sdfr MOPT_STDOPTS, 552892Sdfr { NULL } 562892Sdfr}; 572892Sdfr 5815771Swollmanstatic gid_t a_gid __P((char *)); 5915771Swollmanstatic uid_t a_uid __P((char *)); 6015771Swollmanstatic mode_t a_mask __P((char *)); 6115771Swollmanstatic __dead void usage __P((void)) __dead2; 622892Sdfr 632892Sdfrint 642892Sdfrmain(argc, argv) 652892Sdfr int argc; 662892Sdfr char **argv; 672892Sdfr{ 682892Sdfr struct msdosfs_args args; 692892Sdfr struct stat sb; 702892Sdfr int c, mntflags, set_gid, set_uid, set_mask; 712892Sdfr char *dev, *dir, ndir[MAXPATHLEN+1]; 722999Swollman struct vfsconf *vfc; 732892Sdfr 742892Sdfr mntflags = set_gid = set_uid = set_mask = 0; 752892Sdfr (void)memset(&args, '\0', sizeof(args)); 762892Sdfr 772892Sdfr while ((c = getopt(argc, argv, "u:g:m:o:")) != EOF) { 782892Sdfr switch (c) { 792892Sdfr case 'u': 802892Sdfr args.uid = a_uid(optarg); 812892Sdfr set_uid = 1; 822892Sdfr break; 832892Sdfr case 'g': 842892Sdfr args.gid = a_gid(optarg); 852892Sdfr set_gid = 1; 862892Sdfr break; 872892Sdfr case 'm': 882892Sdfr args.mask = a_mask(optarg); 892892Sdfr set_mask = 1; 902892Sdfr break; 912892Sdfr case 'o': 924065Swollman getmntopts(optarg, mopts, &mntflags, 0); 932892Sdfr break; 942892Sdfr case '?': 952892Sdfr default: 962892Sdfr usage(); 972892Sdfr break; 982892Sdfr } 992892Sdfr } 1002892Sdfr 1012892Sdfr if (optind + 2 != argc) 1022892Sdfr usage(); 1032892Sdfr 1042892Sdfr dev = argv[optind]; 1052892Sdfr dir = argv[optind + 1]; 1062892Sdfr if (dir[0] != '/') { 10715771Swollman warnx("\"%s\" is a relative path", dir); 1082892Sdfr if (getcwd(ndir, sizeof(ndir)) == NULL) 10915771Swollman err(EX_OSERR, "getcwd"); 1102892Sdfr strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1); 1112892Sdfr strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1); 1122892Sdfr dir = ndir; 11315771Swollman warnx("using \"%s\" instead", dir); 1142892Sdfr } 1152892Sdfr 1162892Sdfr args.fspec = dev; 1172892Sdfr args.export.ex_root = -2; /* unchecked anyway on DOS fs */ 1182892Sdfr if (mntflags & MNT_RDONLY) 1192892Sdfr args.export.ex_flags = MNT_EXRDONLY; 1202892Sdfr else 1212892Sdfr args.export.ex_flags = 0; 1222892Sdfr if (!set_gid || !set_uid || !set_mask) { 1232892Sdfr if (stat(dir, &sb) == -1) 12415771Swollman err(EX_OSERR, "stat %s", dir); 1252892Sdfr 1262892Sdfr if (!set_uid) 1272892Sdfr args.uid = sb.st_uid; 1282892Sdfr if (!set_gid) 1292892Sdfr args.gid = sb.st_gid; 1302892Sdfr if (!set_mask) 1312892Sdfr args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 1322892Sdfr } 1332892Sdfr 1342999Swollman vfc = getvfsbyname("msdos"); 1352999Swollman if(!vfc && vfsisloadable("msdos")) { 1362999Swollman if(vfsload("msdos")) 13715771Swollman err(EX_OSERR, "vfsload(msdos)"); 1382999Swollman endvfsent(); /* clear cache */ 1392999Swollman vfc = getvfsbyname("msdos"); 1402999Swollman } 14115771Swollman if (!vfc) 14215771Swollman errx(EX_OSERR, "msdos filesystem is not available"); 1432999Swollman 14415771Swollman if (mount(vfc->vfc_index, dir, mntflags, &args) < 0) 14515771Swollman err(EX_OSERR, "%s", dev); 1462892Sdfr 1472892Sdfr exit (0); 1482892Sdfr} 1492892Sdfr 1502892Sdfrgid_t 1512892Sdfra_gid(s) 1522892Sdfr char *s; 1532892Sdfr{ 1542892Sdfr struct group *gr; 1552892Sdfr char *gname; 1562892Sdfr gid_t gid; 1572892Sdfr 1582892Sdfr if ((gr = getgrnam(s)) != NULL) 1592892Sdfr gid = gr->gr_gid; 1602892Sdfr else { 1612892Sdfr for (gname = s; *s && isdigit(*s); ++s); 1622892Sdfr if (!*s) 1632892Sdfr gid = atoi(gname); 1642892Sdfr else 16515771Swollman errx(EX_NOUSER, "unknown group id: %s", gname); 1662892Sdfr } 1672892Sdfr return (gid); 1682892Sdfr} 1692892Sdfr 1702892Sdfruid_t 1712892Sdfra_uid(s) 1722892Sdfr char *s; 1732892Sdfr{ 1742892Sdfr struct passwd *pw; 1752892Sdfr char *uname; 1762892Sdfr uid_t uid; 1772892Sdfr 1782892Sdfr if ((pw = getpwnam(s)) != NULL) 1792892Sdfr uid = pw->pw_uid; 1802892Sdfr else { 1812892Sdfr for (uname = s; *s && isdigit(*s); ++s); 1822892Sdfr if (!*s) 1832892Sdfr uid = atoi(uname); 1842892Sdfr else 18515771Swollman errx(EX_NOUSER, "unknown user id: %s", uname); 1862892Sdfr } 1872892Sdfr return (uid); 1882892Sdfr} 1892892Sdfr 1902892Sdfrmode_t 1912892Sdfra_mask(s) 1922892Sdfr char *s; 1932892Sdfr{ 1942892Sdfr int done, rv; 1952892Sdfr char *ep; 1962892Sdfr 1972892Sdfr done = 0; 1982892Sdfr if (*s >= '0' && *s <= '7') { 1992892Sdfr done = 1; 2002892Sdfr rv = strtol(optarg, &ep, 8); 2012892Sdfr } 2022892Sdfr if (!done || rv < 0 || *ep) 20315771Swollman errx(EX_USAGE, "invalid file mode: %s", s); 2042892Sdfr return (rv); 2052892Sdfr} 2062892Sdfr 2072892Sdfrvoid 2082892Sdfrusage() 2092892Sdfr{ 2102892Sdfr fprintf(stderr, "usage: mount_msdos [-F flags] [-u user] [-g group] [-m mask] bdev dir\n"); 21115771Swollman exit(EX_USAGE); 2122892Sdfr} 213