1 /*- 2 * Copyright (c) 2009 Ulf Lilleengen 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/sysctl.h> 34 #include <sys/user.h> 35 #include <stdlib.h> 36 #include <string.h> 37 38 #include "libutil.h" 39 40 struct kinfo_proc * 41 kinfo_getproc(pid_t pid) 42 { 43 struct kinfo_proc *kipp; 44 int mib[4]; 45 size_t len; 46 47 len = 0; 48 mib[0] = CTL_KERN; 49 mib[1] = KERN_PROC; 50 mib[2] = KERN_PROC_PID; 51 mib[3] = pid; 52 if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) < 0) 53 return (NULL); 54 55 kipp = malloc(len); 56 if (kipp == NULL) 57 return (NULL); 58 59 if (sysctl(mib, nitems(mib), kipp, &len, NULL, 0) < 0) 60 goto bad; 61 if (len != sizeof(*kipp)) 62 goto bad; 63 if (kipp->ki_structsize != sizeof(*kipp)) 64 goto bad; 65 if (kipp->ki_pid != pid) 66 goto bad; 67 return (kipp); 68 bad: 69 free(kipp); 70 return (NULL); 71 } 72