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/param.h>
30 #include <sys/sysctl.h>
31 #include <sys/user.h>
32 #include <stdlib.h>
33 #include <string.h>
34
35 #include "libutil.h"
36
37 struct kinfo_proc *
kinfo_getproc(pid_t pid)38 kinfo_getproc(pid_t pid)
39 {
40 struct kinfo_proc *kipp;
41 int mib[4];
42 size_t len;
43
44 len = sizeof(*kipp);
45 kipp = malloc(len);
46 if (kipp == NULL)
47 return (NULL);
48
49 mib[0] = CTL_KERN;
50 mib[1] = KERN_PROC;
51 mib[2] = KERN_PROC_PID;
52 mib[3] = pid;
53
54 if (sysctl(mib, nitems(mib), kipp, &len, NULL, 0) < 0)
55 goto bad;
56 if (len != sizeof(*kipp))
57 goto bad;
58 if (kipp->ki_structsize != sizeof(*kipp))
59 goto bad;
60 if (kipp->ki_pid != pid)
61 goto bad;
62 return (kipp);
63 bad:
64 free(kipp);
65 return (NULL);
66 }
67