no SCCS file; new copyright; att/bsd/shared

[unix-history] / usr / src / lib / libc / gen / getmntinfo.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getmntinfo.c	6.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/mount.h>
#include <stdlib.h>

/*
 * Return information about mounted filesystems.
 */
int
getmntinfo(mntbufp, flags)
	struct statfs **mntbufp;
	int flags;
{
	static struct statfs *mntbuf;
	static int mntsize;
	static long bufsize;

	if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0)
		return (0);
	if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
		return (0);
	while (bufsize <= mntsize * sizeof(struct statfs)) {
		if (mntbuf)
			free(mntbuf);
		bufsize = (mntsize + 1) * sizeof(struct statfs);
		if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0)
			return (0);
		if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
			return (0);
	}
	*mntbufp = mntbuf;
	return (mntsize);
}