1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993 Jan-Simon Pendry
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
36 *
37 * From:
38 * $Id: procfs_status.c,v 3.1 1993/12/15 09:40:17 jsp Exp $
39 * $FreeBSD$
40 */
41
42 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/systm.h>
45 #include <sys/exec.h>
46 #include <sys/lock.h>
47 #include <sys/mutex.h>
48 #include <sys/jail.h>
49 #include <sys/malloc.h>
50 #include <sys/mutex.h>
51 #include <sys/sx.h>
52 #include <sys/proc.h>
53 #include <sys/resourcevar.h>
54 #include <sys/sbuf.h>
55 #include <sys/sysent.h>
56 #include <sys/tty.h>
57
58 #include <vm/vm.h>
59 #include <vm/pmap.h>
60 #include <vm/vm_param.h>
61
62 #include <fs/pseudofs/pseudofs.h>
63 #include <fs/procfs/procfs.h>
64
65 int
66 procfs_doprocstatus(PFS_FILL_ARGS)
67 {
68 struct session *sess;
69 struct thread *tdfirst;
70 struct tty *tp;
71 struct ucred *cr;
72 const char *wmesg;
73 char *pc;
74 char *sep;
75 struct timeval boottime;
76 int pid, ppid, pgid, sid;
77 int i;
78
79 pid = p->p_pid;
80 PROC_LOCK(p);
81 ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
82 pgid = p->p_pgrp->pg_id;
83 sess = p->p_pgrp->pg_session;
84 SESS_LOCK(sess);
85 sid = sess->s_leader ? sess->s_leader->p_pid : 0;
86
87 /* comm pid ppid pgid sid tty ctty,sldr start ut st wmsg
88 euid ruid rgid,egid,groups[1 .. ngroups]
89 */
90
91 pc = p->p_comm;
92 do {
93 if (*pc < 33 || *pc > 126 || *pc == '\\')
94 sbuf_printf(sb, "\\%03o", *pc);
95 else
96 sbuf_putc(sb, *pc);
97 } while (*++pc);
98 sbuf_printf(sb, " %d %d %d %d ", pid, ppid, pgid, sid);
99 if ((p->p_flag & P_CONTROLT) && (tp = sess->s_ttyp))
100 sbuf_printf(sb, "%s ", devtoname(tp->t_dev));
101 else
102 sbuf_printf(sb, "- ");
103
104 sep = "";
105 if (sess->s_ttyvp) {
106 sbuf_printf(sb, "%sctty", sep);
107 sep = ",";
108 }
109 if (SESS_LEADER(p)) {
110 sbuf_printf(sb, "%ssldr", sep);
111 sep = ",";
112 }
113 SESS_UNLOCK(sess);
114 if (*sep != ',') {
115 sbuf_printf(sb, "noflags");
116 }
117
118 tdfirst = FIRST_THREAD_IN_PROC(p);
119 thread_lock(tdfirst);
120 if (tdfirst->td_wchan != NULL) {
121 KASSERT(tdfirst->td_wmesg != NULL,
122 ("wchan %p has no wmesg", tdfirst->td_wchan));
123 wmesg = tdfirst->td_wmesg;
124 } else
125 wmesg = "nochan";
126 thread_unlock(tdfirst);
127
128 if (p->p_flag & P_INMEM) {
129 struct timeval start, ut, st;
130
131 PROC_STATLOCK(p);
132 calcru(p, &ut, &st);
133 PROC_STATUNLOCK(p);
134 start = p->p_stats->p_start;
135 getboottime(&boottime);
136 timevaladd(&start, &boottime);
137 sbuf_printf(sb, " %jd,%ld %jd,%ld %jd,%ld",
138 (intmax_t)start.tv_sec, start.tv_usec,
139 (intmax_t)ut.tv_sec, ut.tv_usec,
140 (intmax_t)st.tv_sec, st.tv_usec);
141 } else
142 sbuf_printf(sb, " -1,-1 -1,-1 -1,-1");
143
144 sbuf_printf(sb, " %s", wmesg);
145
146 cr = p->p_ucred;
147
148 sbuf_printf(sb, " %lu %lu %lu",
149 (u_long)cr->cr_uid,
150 (u_long)cr->cr_ruid,
151 (u_long)cr->cr_rgid);
152
153 /* egid (cr->cr_svgid) is equal to cr_ngroups[0]
154 see also getegid(2) in /sys/kern/kern_prot.c */
155
156 for (i = 0; i < cr->cr_ngroups; i++) {
157 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]);
158 }
159
160 if (jailed(cr)) {
161 mtx_lock(&cr->cr_prison->pr_mtx);
162 sbuf_printf(sb, " %s",
163 prison_name(td->td_ucred->cr_prison, cr->cr_prison));
164 mtx_unlock(&cr->cr_prison->pr_mtx);
165 } else {
166 sbuf_printf(sb, " -");
167 }
168 PROC_UNLOCK(p);
169 sbuf_printf(sb, "\n");
170
171 return (0);
172 }
173
174 int
175 procfs_doproccmdline(PFS_FILL_ARGS)
176 {
177
178 /*
179 * If we are using the ps/cmdline caching, use that. Otherwise
180 * read argv from the process space.
181 * Note that if the argv is no longer available, we deliberately
182 * don't fall back on p->p_comm or return an error: the authentic
183 * Linux behaviour is to return zero-length in this case.
184 */
185
186 PROC_LOCK(p);
187 if (p->p_args && p_cansee(td, p) == 0) {
188 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
189 PROC_UNLOCK(p);
190 return (0);
191 }
192
193 if ((p->p_flag & P_SYSTEM) != 0) {
194 PROC_UNLOCK(p);
195 return (0);
196 }
197
198 PROC_UNLOCK(p);
199
200 return (proc_getargv(td, p, sb));
201 }
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