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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)getmntinfo.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <sys/param.h> 39 #include <sys/ucred.h> 40 #include <sys/mount.h> 41 #include <stdlib.h> 42 43 /* 44 * Return information about mounted filesystems. 45 */ 46 int 47 getmntinfo(mntbufp, flags) 48 struct statfs **mntbufp; 49 int flags; 50 { 51 static struct statfs *mntbuf; 52 static int mntsize; 53 static long bufsize; 54 55 if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0) 56 return (0); 57 if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) 58 return (0); 59 while (bufsize <= mntsize * sizeof(struct statfs)) { 60 if (mntbuf) 61 free(mntbuf); 62 bufsize = (mntsize + 1) * sizeof(struct statfs); 63 if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0) 64 return (0); 65 if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) 66 return (0); 67 } 68 *mntbufp = mntbuf; 69 return (mntsize); 70 } 71