procstat_args.c revision 200420 
1/*-
2 * Copyright (c) 2007 Robert N. M. Watson
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: head/usr.bin/procstat/procstat_args.c 200420 2009-12-11 23:35:38Z delphij $
27 */
28
29#include <sys/param.h>
30#include <sys/sysctl.h>
31#include <sys/user.h>
32
33#include <err.h>
34#include <errno.h>
35#include <limits.h>
36#include <stdio.h>
37#include <string.h>
38
39#include "procstat.h"
40
41static char args[ARG_MAX];
42
43void
44procstat_args(pid_t pid, struct kinfo_proc *kipp)
45{
46	int error, name[4];
47	size_t len;
48	char *cp;
49
50	if (!hflag)
51		printf("%5s %-16s %-53s\n", "PID", "COMM", "ARGS");
52
53	name[0] = CTL_KERN;
54	name[1] = KERN_PROC;
55	name[2] = KERN_PROC_ARGS;
56	name[3] = pid;
57	len = sizeof(args);
58	error = sysctl(name, 4, args, &len, NULL, 0);
59	if (error < 0 && errno != ESRCH) {
60		warn("sysctl: kern.proc.args: %d", pid);
61		return;
62	}
63	if (error < 0)
64		return;
65	if (len == 0 || strlen(args) == 0) {
66		strcpy(args, "-");
67		len = strlen(args) + 1;
68	}
69
70	printf("%5d ", pid);
71	printf("%-16s ", kipp->ki_comm);
72	for (cp = args; cp < args + len; cp += strlen(cp) + 1)
73		printf("%s%s", cp != args ? " " : "", cp);
74	printf("\n");
75}
76