procstat_cred.c revision 232182 
1/*-
2 * Copyright (c) 2007-2008 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 232182 2012-02-26 14:27:34Z 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 <libprocstat.h>
35#include <stdlib.h>
36#include <stdio.h>
37#include <unistd.h>
38
39#include "procstat.h"
40
41static const char *get_umask(struct kinfo_proc *kipp);
42
43void
44procstat_cred(struct kinfo_proc *kipp)
45{
46	int i;
47	int mib[4];
48	int ngroups;
49	size_t len;
50	gid_t *groups = NULL;
51
52	if (!hflag)
53		printf("%5s %-16s %5s %5s %5s %5s %5s %5s %5s %5s %-15s\n",
54		    "PID", "COMM", "EUID", "RUID", "SVUID", "EGID", "RGID",
55		    "SVGID", "UMASK", "FLAGS", "GROUPS");
56
57	printf("%5d ", kipp->ki_pid);
58	printf("%-16s ", kipp->ki_comm);
59	printf("%5d ", kipp->ki_uid);
60	printf("%5d ", kipp->ki_ruid);
61	printf("%5d ", kipp->ki_svuid);
62	printf("%5d ", kipp->ki_groups[0]);
63	printf("%5d ", kipp->ki_rgid);
64	printf("%5d ", kipp->ki_svgid);
65	printf("%5s ", get_umask(kipp));
66	printf("%s", kipp->ki_cr_flags & CRED_FLAG_CAPMODE ? "C" : "-");
67	printf("     ");
68
69	/*
70	 * We may have too many groups to fit in kinfo_proc's statically
71	 * sized storage.  If that occurs, attempt to retrieve them via
72	 * sysctl.
73	 */
74	if (kipp->ki_cr_flags & KI_CRF_GRP_OVERFLOW) {
75		mib[0] = CTL_KERN;
76		mib[1] = KERN_PROC;
77		mib[2] = KERN_PROC_GROUPS;
78		mib[3] = kipp->ki_pid;
79
80		ngroups = sysconf(_SC_NGROUPS_MAX) + 1;
81		len = ngroups * sizeof(gid_t);
82		if((groups = malloc(len)) == NULL)
83			err(-1, "malloc");
84
85		if (sysctl(mib, 4, groups, &len, NULL, 0) == -1) {
86			warn("sysctl: kern.proc.groups: %d "
87			    "group list truncated", kipp->ki_pid);
88			free(groups);
89			groups = NULL;
90		}
91		ngroups = len / sizeof(gid_t);
92	}
93	if (groups == NULL) {
94		ngroups = kipp->ki_ngroups;
95		groups = kipp->ki_groups;
96	}
97	for (i = 0; i < ngroups; i++)
98		printf("%s%d", (i > 0) ? "," : "", groups[i]);
99	if (groups != kipp->ki_groups)
100		free(groups);
101
102	printf("\n");
103}
104
105static const char *
106get_umask(struct kinfo_proc *kipp)
107{
108	int error;
109	int mib[4];
110	size_t len;
111	u_short fd_cmask;
112	static char umask[4];
113
114	mib[0] = CTL_KERN;
115	mib[1] = KERN_PROC;
116	mib[2] = KERN_PROC_UMASK;
117	mib[3] = kipp->ki_pid;
118	len = sizeof(fd_cmask);
119	error = sysctl(mib, 4, &fd_cmask, &len, NULL, 0);
120	if (error == 0) {
121		snprintf(umask, 4, "%03o", fd_cmask);
122		return (umask);
123	} else {
124		return ("-");
125	}
126}
127