1 1.17 matt /* $NetBSD: getmntinfo.c,v 1.17 2012/03/20 16:36:05 matt Exp $ */ 2 1.5 cgd 3 1.1 cgd /* 4 1.5 cgd * Copyright (c) 1989, 1993 5 1.5 cgd * The Regents of the University of California. All rights reserved. 6 1.1 cgd * 7 1.1 cgd * Redistribution and use in source and binary forms, with or without 8 1.1 cgd * modification, are permitted provided that the following conditions 9 1.1 cgd * are met: 10 1.1 cgd * 1. Redistributions of source code must retain the above copyright 11 1.1 cgd * notice, this list of conditions and the following disclaimer. 12 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 cgd * notice, this list of conditions and the following disclaimer in the 14 1.1 cgd * documentation and/or other materials provided with the distribution. 15 1.12 agc * 3. Neither the name of the University nor the names of its contributors 16 1.1 cgd * may be used to endorse or promote products derived from this software 17 1.1 cgd * without specific prior written permission. 18 1.1 cgd * 19 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.1 cgd * SUCH DAMAGE. 30 1.1 cgd */ 31 1.1 cgd 32 1.6 christos #include <sys/cdefs.h> 33 1.1 cgd #if defined(LIBC_SCCS) && !defined(lint) 34 1.5 cgd #if 0 35 1.5 cgd static char sccsid[] = "@(#)getmntinfo.c 8.1 (Berkeley) 6/4/93"; 36 1.5 cgd #else 37 1.17 matt __RCSID("$NetBSD: getmntinfo.c,v 1.17 2012/03/20 16:36:05 matt Exp $"); 38 1.5 cgd #endif 39 1.1 cgd #endif /* LIBC_SCCS and not lint */ 40 1.1 cgd 41 1.7 jtc #include "namespace.h" 42 1.4 cgd #include <sys/param.h> 43 1.5 cgd #include <sys/ucred.h> 44 1.1 cgd #include <sys/mount.h> 45 1.9 lukem 46 1.9 lukem #include <assert.h> 47 1.9 lukem #include <errno.h> 48 1.1 cgd #include <stdlib.h> 49 1.7 jtc 50 1.1 cgd /* 51 1.1 cgd * Return information about mounted filesystems. 52 1.1 cgd */ 53 1.1 cgd int 54 1.17 matt getmntinfo(struct statvfs **mntbufp, int flags) 55 1.1 cgd { 56 1.16 christos static struct statvfs *mntbuf; 57 1.1 cgd static int mntsize; 58 1.8 perry static size_t bufsize; 59 1.9 lukem 60 1.9 lukem _DIAGASSERT(mntbufp != NULL); 61 1.1 cgd 62 1.8 perry if (mntsize <= 0 && 63 1.16 christos (mntsize = getvfsstat(NULL, (size_t)0, MNT_NOWAIT)) == -1) 64 1.1 cgd return (0); 65 1.8 perry if (bufsize > 0 && 66 1.16 christos (mntsize = getvfsstat(mntbuf, bufsize, flags)) == -1) 67 1.1 cgd return (0); 68 1.16 christos while (bufsize <= mntsize * sizeof(struct statvfs)) { 69 1.1 cgd if (mntbuf) 70 1.1 cgd free(mntbuf); 71 1.16 christos bufsize = (mntsize + 1) * sizeof(struct statvfs); 72 1.13 christos if ((mntbuf = malloc(bufsize)) == NULL) 73 1.1 cgd return (0); 74 1.16 christos if ((mntsize = getvfsstat(mntbuf, bufsize, flags)) == -1) 75 1.1 cgd return (0); 76 1.1 cgd } 77 1.1 cgd *mntbufp = mntbuf; 78 1.1 cgd return (mntsize); 79 1.1 cgd } 80
Indexes created Mon Sep 22 13:09:51 GMT 2025