458cbc01d2
"nowin95" as arguments to the "-o" flag, as alternatives to "-G", "-s", "-l", and "-9"; when running "mount_msdos" by hand, that doesn't let you do anything you couldn't already do, but if you're letting "mount" run it, it lets you specify those options, which is especially useful if, for example, you have an entry in "/etc/fstab" for some file system, with "noauto" set, so you can conveniently mount a DOS partition from a removable drive and force it to treat the file system as VFAT rather than boring old FAT. Submitted by: Guy Harris <guy@netapp.com>
310 lines
7.2 KiB
C
310 lines
7.2 KiB
C
/* $NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $ */
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/*
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* Copyright (c) 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$Id: mount_msdos.c,v 1.15 1998/06/30 06:23:42 charnier Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <msdosfs/msdosfsmount.h>
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#include <ctype.h>
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#include <err.h>
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#include <grp.h>
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#include <locale.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "mntopts.h"
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/*
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* XXX - no way to specify "foo=<bar>"-type options; that's what we'd
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* want for "-u", "-g", "-m", "-L", and "-W".
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*/
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static struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_FORCE,
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MOPT_SYNC,
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MOPT_UPDATE,
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#ifdef MSDOSFSMNT_GEMDOSFS
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{ "gemdosfs", 0, MSDOSFSMNT_GEMDOSFS, 1 },
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#endif
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{ "shortnames", 0, MSDOSFSMNT_SHORTNAME, 1 },
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{ "longnames", 0, MSDOSFSMNT_LONGNAME, 1 },
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{ "nowin95", 0, MSDOSFSMNT_NOWIN95, 1 },
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{ NULL }
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};
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static gid_t a_gid __P((char *));
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static uid_t a_uid __P((char *));
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static mode_t a_mask __P((char *));
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static void usage __P((void)) __dead2;
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static void load_u2wtable __P((struct msdosfs_args *, char *));
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static void load_ultable __P((struct msdosfs_args *, char *));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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struct msdosfs_args args;
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struct stat sb;
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int c, error, mntflags, set_gid, set_uid, set_mask;
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char *dev, *dir, ndir[MAXPATHLEN+1];
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struct vfsconf vfc;
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mntflags = set_gid = set_uid = set_mask = 0;
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(void)memset(&args, '\0', sizeof(args));
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args.magic = MSDOSFS_ARGSMAGIC;
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while ((c = getopt(argc, argv, "sl9u:g:m:o:L:W:")) != -1) {
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switch (c) {
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#ifdef MSDOSFSMNT_GEMDOSFS
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case 'G':
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args.flags |= MSDOSFSMNT_GEMDOSFS;
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break;
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#endif
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case 's':
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args.flags |= MSDOSFSMNT_SHORTNAME;
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break;
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case 'l':
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args.flags |= MSDOSFSMNT_LONGNAME;
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break;
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case '9':
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args.flags |= MSDOSFSMNT_NOWIN95;
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break;
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case 'u':
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args.uid = a_uid(optarg);
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set_uid = 1;
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break;
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case 'g':
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args.gid = a_gid(optarg);
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set_gid = 1;
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break;
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case 'm':
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args.mask = a_mask(optarg);
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set_mask = 1;
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break;
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case 'L':
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load_ultable(&args, optarg);
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args.flags |= MSDOSFSMNT_ULTABLE;
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break;
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case 'W':
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load_u2wtable(&args, optarg);
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args.flags |= MSDOSFSMNT_U2WTABLE;
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break;
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case 'o':
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getmntopts(optarg, mopts, &mntflags, &args.flags);
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break;
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case '?':
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default:
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usage();
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break;
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}
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}
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if (optind + 2 != argc)
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usage();
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dev = argv[optind];
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dir = argv[optind + 1];
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if (dir[0] != '/') {
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warnx("\"%s\" is a relative path", dir);
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if (getcwd(ndir, sizeof(ndir)) == NULL)
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err(EX_OSERR, "getcwd");
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strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1);
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strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1);
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dir = ndir;
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warnx("using \"%s\" instead", dir);
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}
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args.fspec = dev;
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args.export.ex_root = -2; /* unchecked anyway on DOS fs */
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if (mntflags & MNT_RDONLY)
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args.export.ex_flags = MNT_EXRDONLY;
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else
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args.export.ex_flags = 0;
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if (!set_gid || !set_uid || !set_mask) {
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if (stat(dir, &sb) == -1)
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err(EX_OSERR, "stat %s", dir);
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if (!set_uid)
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args.uid = sb.st_uid;
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if (!set_gid)
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args.gid = sb.st_gid;
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if (!set_mask)
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args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
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}
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error = getvfsbyname("msdos", &vfc);
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if (error && vfsisloadable("msdos")) {
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if (vfsload("msdos"))
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err(EX_OSERR, "vfsload(msdos)");
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endvfsent(); /* clear cache */
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error = getvfsbyname("msdos", &vfc);
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}
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if (error)
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errx(EX_OSERR, "msdos filesystem is not available");
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if (mount(vfc.vfc_name, dir, mntflags, &args) < 0)
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err(EX_OSERR, "%s", dev);
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exit (0);
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}
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gid_t
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a_gid(s)
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char *s;
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{
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struct group *gr;
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char *gname;
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gid_t gid;
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if ((gr = getgrnam(s)) != NULL)
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gid = gr->gr_gid;
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else {
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for (gname = s; *s && isdigit(*s); ++s);
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if (!*s)
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gid = atoi(gname);
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else
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errx(EX_NOUSER, "unknown group id: %s", gname);
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}
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return (gid);
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}
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uid_t
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a_uid(s)
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char *s;
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{
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struct passwd *pw;
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char *uname;
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uid_t uid;
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if ((pw = getpwnam(s)) != NULL)
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uid = pw->pw_uid;
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else {
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for (uname = s; *s && isdigit(*s); ++s);
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if (!*s)
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uid = atoi(uname);
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else
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errx(EX_NOUSER, "unknown user id: %s", uname);
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}
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return (uid);
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}
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mode_t
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a_mask(s)
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char *s;
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{
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int done, rv;
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char *ep;
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done = 0;
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rv = -1;
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if (*s >= '0' && *s <= '7') {
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done = 1;
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rv = strtol(optarg, &ep, 8);
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}
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if (!done || rv < 0 || *ep)
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errx(EX_USAGE, "invalid file mode: %s", s);
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return (rv);
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}
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void
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usage()
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{
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fprintf(stderr, "%s\n%s\n",
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"usage: mount_msdos [-o options] [-u user] [-g group] [-m mask]",
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" [-s] [-l] [-9] [-L locale] [-W table] bdev dir");
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exit(EX_USAGE);
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}
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void
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load_u2wtable (pargs, name)
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struct msdosfs_args *pargs;
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char *name;
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{
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FILE *f;
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int i, code;
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char buf[128];
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char *fn;
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if (*name == '/')
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fn = name;
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else {
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snprintf(buf, sizeof(buf), "/usr/libdata/msdosfs/%s", name);
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buf[127] = '\0';
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fn = buf;
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}
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if ((f = fopen(fn, "r")) == NULL)
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err(EX_NOINPUT, "%s", fn);
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for (i = 0; i < 128; i++) {
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if (fscanf(f, "%i", &code) != 1)
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errx(EX_DATAERR, "u2w: missing item number %d", i);
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pargs->u2w[i] = code;
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}
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for (i = 0; i < 128; i++) {
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if (fscanf(f, "%i", &code) != 1)
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errx(EX_DATAERR, "d2u: missing item number %d", i);
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pargs->d2u[i] = code;
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}
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for (i = 0; i < 128; i++) {
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if (fscanf(f, "%i", &code) != 1)
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errx(EX_DATAERR, "u2d: missing item number %d", i);
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pargs->u2d[i] = code;
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}
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fclose(f);
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}
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void
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load_ultable (pargs, name)
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struct msdosfs_args *pargs;
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char *name;
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{
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int i;
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if (setlocale(LC_CTYPE, name) == NULL)
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err(EX_CONFIG, name);
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for (i = 0; i < 128; i++) {
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pargs->ul[i] = tolower(i | 0x80);
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pargs->lu[i] = toupper(i | 0x80);
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}
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}
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