1/* $NetBSD: procfs_status.c,v 1.37 2016/11/14 08:55:51 kre Exp $ */
2
3/*
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Jan-Simon Pendry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
35 */
36
37/*
38 * Copyright (c) 1993 Jan-Simon Pendry
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Jan-Simon Pendry.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
72 */
73
74#include <sys/cdefs.h>
75__KERNEL_RCSID(0, "$NetBSD: procfs_status.c,v 1.37 2016/11/14 08:55:51 kre Exp $");
76
77#include <sys/param.h>
78#include <sys/systm.h>
79#include <sys/time.h>
80#include <sys/kernel.h>
81#include <sys/proc.h>
82#include <sys/vnode.h>
83#include <sys/ioctl.h>
84#include <sys/tty.h>
85#include <sys/resource.h>
86#include <sys/resourcevar.h>
87#include <sys/kauth.h>
88
89#include <miscfs/procfs/procfs.h>
90
91int
92procfs_dostatus(
93 struct lwp *curl,
94 struct lwp *l,
95 struct pfsnode *pfs,
96 struct uio *uio
97)
98{
99 struct session *sess;
100 struct tty *tp;
101 kauth_cred_t cr;
102 struct proc *p = l->l_proc;
103 char *ps;
104 const char *sep;
105 int pid, ppid, pgid, sid;
106 u_int i;
107 char psbuf[256+MAXHOSTNAMELEN]; /* XXX - conservative */
108 uint16_t ngroups;
109
110 if (uio->uio_rw != UIO_READ)
111 return (EOPNOTSUPP);
112
113 mutex_enter(proc_lock);
114 mutex_enter(p->p_lock);
115
116 pid = p->p_pid;
117 ppid = p->p_ppid;
118 pgid = p->p_pgrp->pg_id;
119 sess = p->p_pgrp->pg_session;
120 sid = sess->s_sid;
121
122/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg uid gid groups ... */
123
124 ps = psbuf;
125 memcpy(ps, p->p_comm, MAXCOMLEN);
126 ps[MAXCOMLEN] = '\0';
127 ps += strlen(ps);
128 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), " %d %d %d %d ",
129 pid, ppid, pgid, sid);
130
131 if ((p->p_lflag & PL_CONTROLT) && (tp = sess->s_ttyp))
132 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), "%llu,%llu ",
133 (unsigned long long)major(tp->t_dev),
134 (unsigned long long)minor(tp->t_dev));
135 else
136 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), "%d,%d ",
137 -1, -1);
138
139 sep = "";
140 if (sess->s_ttyvp) {
141 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), "%sctty", sep);
142 sep = ",";
143 }
144 if (SESS_LEADER(p)) {
145 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), "%ssldr", sep);
146 sep = ",";
147 }
148 if (*sep != ',')
149 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), "noflags");
150
151 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), " %lld,%ld",
152 (long long)p->p_stats->p_start.tv_sec,
153 (long)p->p_stats->p_start.tv_usec);
154
155 {
156 struct timeval ut, st;
157
158 calcru(p, &ut, &st, (void *) 0, NULL);
159 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf),
160 " %lld,%ld %lld,%ld", (long long)ut.tv_sec,
161 (long)ut.tv_usec, (long long)st.tv_sec, (long)st.tv_usec);
162 }
163
164 lwp_lock(l);
165 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), " %s",
166 (l->l_wchan && l->l_wmesg) ? l->l_wmesg : "nochan");
167 lwp_unlock(l);
168
169 cr = p->p_cred;
170
171 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), " %d",
172 kauth_cred_geteuid(cr));
173 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), " %d",
174 kauth_cred_getegid(cr));
175 ngroups = kauth_cred_ngroups(cr);
176 for (i = 0; i < ngroups; i++)
177 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), ",%d",
178 kauth_cred_group(cr, i));
179 ps += snprintf(ps, sizeof(psbuf) - (ps - psbuf), "\n");
180
181 mutex_exit(p->p_lock);
182 mutex_exit(proc_lock);
183
184 return (uiomove_frombuf(psbuf, ps - psbuf, uio));
185}
186