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 *
kinfo_getproc(pid_t pid)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