procstat_args.c revision 230917 
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: stable/9/usr.bin/procstat/procstat_args.c 230917 2012-02-02 18:17:49Z trociny $
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 <libprocstat.h>
36#include <limits.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40
41#include "procstat.h"
42
43static char args[ARG_MAX];
44
45static void
46do_args(struct kinfo_proc *kipp, int env)
47{
48	int error, name[4];
49	size_t len;
50	char *cp;
51
52	if (!hflag)
53		printf("%5s %-16s %-53s\n", "PID", "COMM",
54		    env ? "ENVIRONMENT" : "ARGS");
55
56	name[0] = CTL_KERN;
57	name[1] = KERN_PROC;
58	name[2] = env ? KERN_PROC_ENV : KERN_PROC_ARGS;
59	name[3] = kipp->ki_pid;
60	len = sizeof(args);
61	error = sysctl(name, 4, args, &len, NULL, 0);
62	if (error < 0 && errno != ESRCH && errno != EPERM) {
63		warn("sysctl: kern.proc.%s: %d: %d", env ? "env" : "args",
64		    kipp->ki_pid, errno);
65		return;
66	}
67	if (error < 0)
68		return;
69	if (len == 0 || strlen(args) == 0) {
70		strcpy(args, "-");
71		len = strlen(args) + 1;
72	}
73
74	printf("%5d ", kipp->ki_pid);
75	printf("%-16s ", kipp->ki_comm);
76	for (cp = args; cp < args + len; cp += strlen(cp) + 1)
77		printf("%s%s", cp != args ? " " : "", cp);
78	printf("\n");
79}
80
81void
82procstat_args(struct kinfo_proc *kipp)
83{
84	do_args(kipp, 0);
85}
86
87void
88procstat_env(struct kinfo_proc *kipp)
89{
90	do_args(kipp, 1);
91}
92