mirror of https://github.com/ventoy/Ventoy
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
|
|
* @(#)mount_null.c 8.6 (Berkeley) 4/26/95
|
|
* $FreeBSD: src/sbin/mount_null/mount_null.c,v 1.13 1999/10/09 11:54:11 phk Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/mount.h>
|
|
#include <vfs/nullfs/null.h>
|
|
|
|
#include <err.h>
|
|
#include <mntopts.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sysexits.h>
|
|
#include <unistd.h>
|
|
|
|
static struct mntopt mopts[] = {
|
|
MOPT_STDOPTS,
|
|
MOPT_UPDATE,
|
|
MOPT_NULL
|
|
};
|
|
|
|
static void usage(void) __dead2;
|
|
|
|
int
|
|
mount_null(const char *src, const char *dst)
|
|
{
|
|
struct null_args args;
|
|
int ch, mntflags;
|
|
char source[MAXPATHLEN];
|
|
char target[MAXPATHLEN];
|
|
struct vfsconf vfc;
|
|
int error;
|
|
|
|
bzero(&args, sizeof(args));
|
|
mntflags = 0;
|
|
|
|
args.target = target;
|
|
checkpath(src, target);
|
|
checkpath(dst, source);
|
|
|
|
/*
|
|
* Mount points that did not use distinct paths (e.g. / on /mnt)
|
|
* used to be disallowed because mount linkages were stored in
|
|
* vnodes and would lead to endlessly recursive trees. DragonFly
|
|
* stores mount linkages in the namecache topology and does not
|
|
* have this problem, so paths no longer need to be distinct.
|
|
*/
|
|
|
|
error = getvfsbyname("null", &vfc);
|
|
if (error && vfsisloadable("null")) {
|
|
if(vfsload("null"))
|
|
err(EX_OSERR, "vfsload(null)");
|
|
endvfsent();
|
|
error = getvfsbyname("null", &vfc);
|
|
}
|
|
if (error)
|
|
errx(EX_OSERR, "null/loopback filesystem is not available");
|
|
|
|
if (mount(vfc.vfc_name, source, mntflags, &args))
|
|
err(1, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: mount_null [-o options] target_fs mount_point\n");
|
|
fprintf(stderr,
|
|
" mount_null -u [-o options] mount_point\n");
|
|
exit(1);
|
|
}
|