1 /* 2 * Copyright (c) 2004 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Joerg Sonnenberger <joerg@bec.de>. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/lib/libkcore/kcore_vfs.c,v 1.1 2004/11/24 22:51:01 joerg Exp $ 35 */ 36 37 #include <sys/param.h> 38 39 #include <err.h> 40 #include <errno.h> 41 #include <kcore.h> 42 #include <kvm.h> 43 #include <nlist.h> 44 45 #include "kcore_private.h" 46 47 int 48 kcore_get_vfs_bufspace(struct kcore_data *kc, int *bufspace) 49 { 50 static struct nlist nl[] = { 51 { "_bufspace", 0, 0, 0, 0}, 52 { NULL, 0, 0, 0, 0} 53 }; 54 55 if (kc == NULL) 56 kc = &kcore_global; 57 58 if (nl[0].n_value == 0) { 59 if ((kvm_nlist(kc->kd, nl) < 0) || (nl[0].n_value == 0)) { 60 errno = EOPNOTSUPP; 61 return(-1); 62 } 63 } 64 if (kvm_read(kc->kd, nl[0].n_value, bufspace, 65 sizeof(*bufspace)) != sizeof(*bufspace)) { 66 warnx("cannot read _bufspace: %s", kvm_geterr(kc->kd)); 67 } 68 return(0); 69 } 70