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/* $OpenBSD: getmntinfo.c,v 1.11 2019/06/28 13:32:41 deraadt Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* 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/types.h>
#include <sys/mount.h>
#include <stdlib.h>
/*
* Return information about mounted filesystems.
*/
int
getmntinfo(struct statfs **mntbufp, int flags)
{
static struct statfs *mntbuf;
static int mntsize;
static size_t bufsize;
if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) == -1)
return (0);
if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) == -1)
return (0);
while (bufsize <= mntsize * sizeof(struct statfs)) {
free(mntbuf);
bufsize = (mntsize + 1) * sizeof(struct statfs);
if ((mntbuf = malloc(bufsize)) == NULL) {
bufsize = 0;
return (0);
}
if ((mntsize = getfsstat(mntbuf, bufsize, flags)) == -1)
return (0);
}
*mntbufp = mntbuf;
return (mntsize);
}
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