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. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)getmntinfo.c 8.1 (Berkeley) 6/4/93 35 */ 36 37 #include <sys/param.h> 38 #include <sys/ucred.h> 39 #include <sys/mount.h> 40 #include <sys/statvfs.h> 41 #include <stdlib.h> 42 43 /* 44 * Return information about mounted filesystems. 45 */ 46 int 47 getmntvinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, int flags) 48 { 49 static struct statfs *mntsbuf; 50 static struct statvfs *mntvbuf; 51 static int mntsize; 52 static int bufsize; 53 static int vbufsize; 54 55 if (mntsize <= 0 && (mntsize = getvfsstat(NULL, NULL, 0, MNT_NOWAIT)) < 0) 56 return (0); 57 if (vbufsize > 0 && (mntsize = getvfsstat(mntsbuf, mntvbuf, vbufsize, flags)) < 0) 58 return (0); 59 while (vbufsize <= mntsize * (int)sizeof(struct statvfs)) { 60 if (mntsbuf) 61 free(mntsbuf); 62 bufsize = (mntsize + 1) * sizeof(struct statfs); 63 vbufsize = (mntsize + 1) * sizeof(struct statvfs); 64 if ((mntsbuf = (struct statfs *)malloc(bufsize)) == NULL) 65 return (0); 66 if ((mntvbuf = (struct statvfs *)malloc(vbufsize)) == NULL) 67 return (0); 68 if ((mntsize = getvfsstat(mntsbuf, mntvbuf, vbufsize, flags)) < 0) 69 return (0); 70 } 71 *mntbufp = mntsbuf; 72 *mntvbufp = mntvbuf; 73 return (mntsize); 74 } 75 76