/* $NetBSD: mount_overlay.c,v 1.14 2020/07/26 08:20:22 mlelstv Exp $ */ /* * Copyright (c) 1992, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software donated to Berkeley by * Jan-Simon Pendry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95"; #else __RCSID("$NetBSD: mount_overlay.c,v 1.14 2020/07/26 08:20:22 mlelstv Exp $"); #endif #endif /* not lint */ #include <sys/param.h> #include <sys/mount.h> #include <miscfs/overlay/overlay.h> #include <err.h> #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <string.h> #include <mntopts.h> #include "mountprog.h" static const struct mntopt mopts[] = { MOPT_STDOPTS, MOPT_GETARGS, MOPT_NULL, }; int mount_overlay(int argc, char **argv); __dead static void usage(void); #ifndef MOUNT_NOMAIN int main(int argc, char **argv) { return mount_overlay(argc, argv); } #endif int mount_overlay(int argc, char *argv[]) { struct overlay_args args; int ch, mntflags; char target[MAXPATHLEN], canon_dir[MAXPATHLEN]; mntoptparse_t mp; mntflags = 0; while ((ch = getopt(argc, argv, "o:")) != -1) switch(ch) { case 'o': mp = getmntopts(optarg, mopts, &mntflags, 0); if (mp == NULL) err(1, "getmntopts"); freemntopts(mp); break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc != 2) usage(); pathadj(argv[0], target); pathadj(argv[1], canon_dir); args.la.target = target; if (mount(MOUNT_OVERLAY, canon_dir, mntflags, &args, sizeof args) == -1) err(1, "%s on %s", target, canon_dir); exit(0); } static void usage(void) { (void)fprintf(stderr, "usage: mount_overlay [-o options] /overlay mount_point\n"); exit(1); }