1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char rcsid[] = "$OpenBSD: getmntinfo.c,v 1.5 2003/06/02 20:18:34 millert Exp $"; 32 #endif /* LIBC_SCCS and not lint */ 33 34 #include <sys/param.h> 35 #include <sys/mount.h> 36 #include <stdlib.h> 37 38 /* 39 * Return information about mounted filesystems. 40 */ 41 int 42 getmntinfo(mntbufp, flags) 43 struct statfs **mntbufp; 44 int flags; 45 { 46 static struct statfs *mntbuf; 47 static int mntsize; 48 static size_t bufsize; 49 50 if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0) 51 return (0); 52 if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) 53 return (0); 54 while (bufsize <= mntsize * sizeof(struct statfs)) { 55 if (mntbuf) 56 free(mntbuf); 57 bufsize = (mntsize + 1) * sizeof(struct statfs); 58 if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0) { 59 bufsize = 0; 60 return (0); 61 } 62 if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) 63 return (0); 64 } 65 *mntbufp = mntbuf; 66 return (mntsize); 67 } 68