1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009 Ulf Lilleengen 5 * All rights reserved. 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 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/sysctl.h> 32 #include <sys/user.h> 33 #include <stdlib.h> 34 #include <string.h> 35 36 #include "libutil.h" 37 38 struct kinfo_proc * 39 kinfo_getproc(pid_t pid) 40 { 41 struct kinfo_proc *kipp; 42 int mib[4]; 43 size_t len; 44 45 len = sizeof(*kipp); 46 kipp = malloc(len); 47 if (kipp == NULL) 48 return (NULL); 49 50 mib[0] = CTL_KERN; 51 mib[1] = KERN_PROC; 52 mib[2] = KERN_PROC_PID; 53 mib[3] = pid; 54 55 if (sysctl(mib, nitems(mib), kipp, &len, NULL, 0) < 0) 56 goto bad; 57 if (len != sizeof(*kipp)) 58 goto bad; 59 if (kipp->ki_structsize != sizeof(*kipp)) 60 goto bad; 61 if (kipp->ki_pid != pid) 62 goto bad; 63 return (kipp); 64 bad: 65 free(kipp); 66 return (NULL); 67 } 68