procstat_args.c revision 174530 
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 174530 2007-12-10 20:55:43Z rwatson $
27 */
28
29#include <sys/types.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 <stdlib.h>
38#include <string.h>
39
40#include "procstat.h"
41
42static char args[ARG_MAX];
43
44void
45procstat_args(pid_t pid, struct kinfo_proc *kipp)
46{
47	int error, name[4];
48	size_t len;
49	char *cp;
50
51	if (!hflag)
52		printf("%5s %-16s %-53s\n", "PID", "COMM", "ARGS");
53
54	name[0] = CTL_KERN;
55	name[1] = KERN_PROC;
56	name[2] = KERN_PROC_ARGS;
57	name[3] = pid;
58	len = sizeof(args);
59	error = sysctl(name, 4, args, &len, NULL, 0);
60	if (error < 0 && errno != ESRCH) {
61		warn("sysctl: kern.proc.args: %d", pid);
62		return;
63	}
64	if (error < 0)
65		return;
66	if (len == 0 || strlen(args) == 0) {
67		strcpy(args, "-");
68		len = strlen(args) + 1;
69	}
70
71	printf("%5d ", pid);
72	printf("%-16s ", kipp->ki_comm);
73	for (cp = args; cp < args + len; cp += strlen(cp) + 1)
74		printf("%s%s", cp != args ? " " : "", cp);
75	printf("\n");
76}
77