libc/gen/getmntinfo.c

    1.1  cgd /*
1.1.1.2  cgd  * Copyright (c) 1989, 1993
1.1.1.2  cgd  *	The Regents of the University of California.  All rights reserved.
    1.1  cgd  *
    1.1  cgd  * Redistribution and use in source and binary forms, with or without
    1.1  cgd  * modification, are permitted provided that the following conditions
    1.1  cgd  * are met:
    1.1  cgd  * 1. Redistributions of source code must retain the above copyright
    1.1  cgd  *    notice, this list of conditions and the following disclaimer.
    1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
    1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
    1.1  cgd  *    documentation and/or other materials provided with the distribution.
    1.1  cgd  * 3. All advertising materials mentioning features or use of this software
    1.1  cgd  *    must display the following acknowledgement:
    1.1  cgd  *	This product includes software developed by the University of
    1.1  cgd  *	California, Berkeley and its contributors.
    1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
    1.1  cgd  *    may be used to endorse or promote products derived from this software
    1.1  cgd  *    without specific prior written permission.
    1.1  cgd  *
    1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    1.1  cgd  * SUCH DAMAGE.
    1.1  cgd  */
    1.1  cgd
    1.1  cgd #if defined(LIBC_SCCS) && !defined(lint)
1.1.1.2  cgd static char sccsid[] = "@(#)getmntinfo.c	8.1 (Berkeley) 6/4/93";
    1.1  cgd #endif /* LIBC_SCCS and not lint */
    1.1  cgd
1.1.1.2  cgd #include <sys/param.h>
1.1.1.2  cgd #include <sys/ucred.h>
    1.1  cgd #include <sys/mount.h>
    1.1  cgd #include <stdlib.h>
    1.1  cgd
    1.1  cgd /*
    1.1  cgd  * Return information about mounted filesystems.
    1.1  cgd  */
    1.1  cgd int
    1.1  cgd getmntinfo(mntbufp, flags)
    1.1  cgd 	struct statfs **mntbufp;
    1.1  cgd 	int flags;
    1.1  cgd {
    1.1  cgd 	static struct statfs *mntbuf;
    1.1  cgd 	static int mntsize;
    1.1  cgd 	static long bufsize;
    1.1  cgd
    1.1  cgd 	if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0)
    1.1  cgd 		return (0);
    1.1  cgd 	if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
    1.1  cgd 		return (0);
    1.1  cgd 	while (bufsize <= mntsize * sizeof(struct statfs)) {
    1.1  cgd 		if (mntbuf)
    1.1  cgd 			free(mntbuf);
    1.1  cgd 		bufsize = (mntsize + 1) * sizeof(struct statfs);
    1.1  cgd 		if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0)
    1.1  cgd 			return (0);
    1.1  cgd 		if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
    1.1  cgd 			return (0);
    1.1  cgd 	}
    1.1  cgd 	*mntbufp = mntbuf;
    1.1  cgd 	return (mntsize);
    1.1  cgd }