1 /*- 2 * Copyright (c) 2003 Poul-Henning Kamp 3 * 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. The names of the authors may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <sys/types.h> 33 #include <sys/sysctl.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include "libgeom.h" 37 38 char * 39 geom_getxml() 40 { 41 char *p; 42 size_t l; 43 int i; 44 45 l = 1024 * 1024; /* Start big, realloc back */ 46 p = malloc(l); 47 if (p) { 48 i = sysctlbyname("kern.geom.confxml", p, &l, NULL, 0); 49 if (i == 0) { 50 p = realloc(p, strlen(p) + 1); 51 return (p); 52 } 53 free(p); 54 } 55 l = 0; 56 i = sysctlbyname("kern.geom.confxml", NULL, &l, NULL, 0); 57 if (i != 0) 58 return (NULL); 59 p = malloc(l + 4096); 60 i = sysctlbyname("kern.geom.confxml", p, &l, NULL, 0); 61 if (i == 0) { 62 p = realloc(p, strlen(p) + 1); 63 return (p); 64 } 65 return (NULL); 66 } 67