1 /* $NetBSD: getmntinfo.c,v 1.11 2000/01/22 22:19:10 mycroft 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 1.11 2000/01/22 22:19:10 mycroft 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 50 #include <assert.h> 51 #include <errno.h> 52 #include <stdlib.h> 53 54 #ifdef __weak_alias 55 __weak_alias(getmntinfo,_getmntinfo) 56 #endif 57 58 /* 59 * Return information about mounted filesystems. 60 */ 61 int 62 getmntinfo(mntbufp, flags) 63 struct statfs **mntbufp; 64 int flags; 65 { 66 static struct statfs *mntbuf; 67 static int mntsize; 68 static size_t bufsize; 69 70 _DIAGASSERT(mntbufp != NULL); 71 72 if (mntsize <= 0 && 73 (mntsize = getfsstat(NULL, 0L, MNT_NOWAIT)) < 0) 74 return (0); 75 if (bufsize > 0 && 76 (mntsize = getfsstat(mntbuf, (long)bufsize, flags)) < 0) 77 return (0); 78 while (bufsize <= mntsize * sizeof(struct statfs)) { 79 if (mntbuf) 80 free(mntbuf); 81 bufsize = (mntsize + 1) * sizeof(struct statfs); 82 if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0) 83 return (0); 84 if ((mntsize = getfsstat(mntbuf, (long)bufsize, flags)) < 0) 85 return (0); 86 } 87 *mntbufp = mntbuf; 88 return (mntsize); 89 } 90