1/* $NetBSD: getmntinfo.c,v 1.16 2005/09/13 01:44:09 christos Exp $ */ 2 3/* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#if defined(LIBC_SCCS) && !defined(lint) 34#if 0 35static char sccsid[] = "@(#)getmntinfo.c 8.1 (Berkeley) 6/4/93"; 36#else 37__RCSID("$NetBSD: getmntinfo.c,v 1.16 2005/09/13 01:44:09 christos Exp $"); 38#endif 39#endif /* LIBC_SCCS and not lint */ 40 41#include "namespace.h" 42#include <sys/param.h> 43#include <sys/ucred.h> 44#include <sys/mount.h> 45 46#include <assert.h> 47#include <errno.h> 48#include <stdlib.h> 49 50/* 51 * Return information about mounted filesystems. 52 */ 53int 54getmntinfo(struct statvfs **mntbufp, int flags) 55{ 56 static struct statvfs *mntbuf; 57 static int mntsize; 58 static size_t bufsize; 59 60 _DIAGASSERT(mntbufp != NULL); 61 62 if (mntsize <= 0 && 63 (mntsize = getvfsstat(NULL, (size_t)0, MNT_NOWAIT)) == -1) 64 return (0); 65 if (bufsize > 0 && 66 (mntsize = getvfsstat(mntbuf, bufsize, flags)) == -1) 67 return (0); 68 while (bufsize <= mntsize * sizeof(struct statvfs)) { 69 if (mntbuf) 70 free(mntbuf); 71 bufsize = (mntsize + 1) * sizeof(struct statvfs); 72 if ((mntbuf = malloc(bufsize)) == NULL) 73 return (0); 74 if ((mntsize = getvfsstat(mntbuf, bufsize, flags)) == -1) 75 return (0); 76 } 77 *mntbufp = mntbuf; 78 return (mntsize); 79} 80