xref: /freebsd/usr.bin/procstat/procstat_cred.c (revision ddd5b8e9b4d8957fce018c520657cdfa4ecffad3)
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  * $FreeBSD$
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 
41 static const char *get_umask(struct kinfo_proc *kipp);
42 
43 void
44 procstat_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 
105 static const char *
106 get_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