1 /* $NetBSD: getmntinfo.c,v 1.7 1997/07/21 14:07:09 jtc 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)getmntinfo.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: getmntinfo.c,v 1.7 1997/07/21 14:07:09 jtc Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 #include <sys/ucred.h> 48 #include <sys/mount.h> 49 #include <stdlib.h> 50 51 #ifdef __weak_alias 52 __weak_alias(getmntinfo,_getmntinfo); 53 #endif 54 55 /* 56 * Return information about mounted filesystems. 57 */ 58 int 59 getmntinfo(mntbufp, flags) 60 struct statfs **mntbufp; 61 int flags; 62 { 63 static struct statfs *mntbuf; 64 static int mntsize; 65 static long bufsize; 66 67 if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0) 68 return (0); 69 if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) 70 return (0); 71 while (bufsize <= mntsize * sizeof(struct statfs)) { 72 if (mntbuf) 73 free(mntbuf); 74 bufsize = (mntsize + 1) * sizeof(struct statfs); 75 if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0) 76 return (0); 77 if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) 78 return (0); 79 } 80 *mntbufp = mntbuf; 81 return (mntsize); 82 } 83