procstat_cred.c revision 195853 
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_cred.c 195853 2009-07-24 19:12:19Z brooks $
27 */
28
29#include <sys/param.h>
30#include <sys/sysctl.h>
31#include <sys/user.h>
32
33#include <err.h>
34#include <stdlib.h>
35#include <stdio.h>
36#include <unistd.h>
37
38#include "procstat.h"
39
40void
41procstat_cred(pid_t pid, struct kinfo_proc *kipp)
42{
43	int i;
44	int mib[4];
45	int ngroups;
46	size_t len;
47	gid_t *groups = NULL;
48
49	if (!hflag)
50		printf("%5s %-16s %5s %5s %5s %5s %5s %5s %-20s\n", "PID",
51		    "COMM", "EUID", "RUID", "SVUID", "EGID", "RGID", "SVGID",
52		    "GROUPS");
53
54	printf("%5d ", pid);
55	printf("%-16s ", kipp->ki_comm);
56	printf("%5d ", kipp->ki_uid);
57	printf("%5d ", kipp->ki_ruid);
58	printf("%5d ", kipp->ki_svuid);
59	printf("%5d ", kipp->ki_groups[0]);
60	printf("%5d ", kipp->ki_rgid);
61	printf("%5d ", kipp->ki_svgid);
62
63	/*
64	 * We may have too many groups to fit in kinfo_proc's statically
65	 * sized storage.  If that occurs, attempt to retrieve them via
66	 * sysctl.
67	 */
68	if (kipp->ki_cr_flags & KI_CRF_GRP_OVERFLOW) {
69		mib[0] = CTL_KERN;
70		mib[1] = KERN_PROC;
71		mib[2] = KERN_PROC_GROUPS;
72		mib[3] = pid;
73
74		ngroups = sysconf(_SC_NGROUPS_MAX) + 1;
75		len = ngroups * sizeof(gid_t);
76		if((groups = malloc(len)) == NULL)
77			err(-1, "malloc");
78
79		if (sysctl(mib, 4, groups, &len, NULL, 0) == -1) {
80			warn("sysctl: kern.proc.groups: %d "
81			    "group list truncated", pid);
82			free(groups);
83			groups = NULL;
84		}
85		ngroups = len / sizeof(gid_t);
86	}
87	if (groups == NULL) {
88		ngroups = kipp->ki_ngroups;
89		groups = kipp->ki_groups;
90	}
91	for (i = 0; i < ngroups; i++)
92		printf("%s%d", (i > 0) ? "," : "", groups[i]);
93	if (groups != kipp->ki_groups)
94		free(groups);
95
96	printf("\n");
97}
98