1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 2008 The DragonFly Project. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)getmntinfo.c 8.1 (Berkeley) 6/4/93 31 */ 32 33 #include <sys/param.h> 34 #include <sys/ucred.h> 35 #include <sys/mount.h> 36 #include <sys/statvfs.h> 37 #include <stdlib.h> 38 39 /* 40 * Return information about mounted filesystems. 41 */ 42 int 43 getmntvinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, int flags) 44 { 45 static struct statfs *mntsbuf; 46 static struct statvfs *mntvbuf; 47 static int mntsize; 48 static int bufsize; 49 static int vbufsize; 50 51 if (mntsize <= 0 && (mntsize = getvfsstat(NULL, NULL, 0, MNT_NOWAIT)) < 0) 52 return (0); 53 if (vbufsize > 0 && (mntsize = getvfsstat(mntsbuf, mntvbuf, vbufsize, flags)) < 0) 54 return (0); 55 while (vbufsize <= mntsize * (int)sizeof(struct statvfs)) { 56 if (mntsbuf) 57 free(mntsbuf); 58 bufsize = (mntsize + 1) * sizeof(struct statfs); 59 vbufsize = (mntsize + 1) * sizeof(struct statvfs); 60 if ((mntsbuf = (struct statfs *)malloc(bufsize)) == NULL) 61 return (0); 62 if ((mntvbuf = (struct statvfs *)malloc(vbufsize)) == NULL) 63 return (0); 64 if ((mntsize = getvfsstat(mntsbuf, mntvbuf, vbufsize, flags)) < 0) 65 return (0); 66 } 67 *mntbufp = mntsbuf; 68 *mntvbufp = mntvbuf; 69 return (mntsize); 70 } 71 72