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 * From:
36 * $Id: procfs_status.c,v 3.1 1993/12/15 09:40:17 jsp Exp $
37 */
38
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/systm.h>
42 #include <sys/exec.h>
43 #include <sys/lock.h>
44 #include <sys/mutex.h>
45 #include <sys/jail.h>
46 #include <sys/malloc.h>
47 #include <sys/mutex.h>
48 #include <sys/sx.h>
49 #include <sys/proc.h>
50 #include <sys/resourcevar.h>
51 #include <sys/sbuf.h>
52 #include <sys/tty.h>
53
54 #include <vm/vm.h>
55 #include <vm/pmap.h>
56 #include <vm/vm_param.h>
57
58 #include <fs/pseudofs/pseudofs.h>
59 #include <fs/procfs/procfs.h>
60
61 int
procfs_doprocstatus(PFS_FILL_ARGS)62 procfs_doprocstatus(PFS_FILL_ARGS)
63 {
64 struct timeval start, ut, st;
65 struct session *sess;
66 struct thread *tdfirst;
67 struct tty *tp;
68 struct ucred *cr;
69 const char *wmesg;
70 char *pc;
71 char *sep;
72 struct timeval boottime;
73 int pid, ppid, pgid, sid;
74 int i;
75
76 pid = p->p_pid;
77 PROC_LOCK(p);
78 ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
79 pgid = p->p_pgrp->pg_id;
80 sess = p->p_pgrp->pg_session;
81 SESS_LOCK(sess);
82 sid = sess->s_leader ? sess->s_leader->p_pid : 0;
83
84 /* comm pid ppid pgid sid tty ctty,sldr start ut st wmsg
85 euid ruid rgid,egid,groups[1 .. ngroups]
86 */
87
88 pc = p->p_comm;
89 do {
90 if (*pc < 33 || *pc > 126 || *pc == '\\')
91 sbuf_printf(sb, "\\%03o", *pc);
92 else
93 sbuf_putc(sb, *pc);
94 } while (*++pc);
95 sbuf_printf(sb, " %d %d %d %d ", pid, ppid, pgid, sid);
96 if ((p->p_flag & P_CONTROLT) && (tp = sess->s_ttyp))
97 sbuf_printf(sb, "%s ", devtoname(tp->t_dev));
98 else
99 sbuf_printf(sb, "- ");
100
101 sep = "";
102 if (sess->s_ttyvp) {
103 sbuf_printf(sb, "%sctty", sep);
104 sep = ",";
105 }
106 if (SESS_LEADER(p)) {
107 sbuf_printf(sb, "%ssldr", sep);
108 sep = ",";
109 }
110 SESS_UNLOCK(sess);
111 if (*sep != ',') {
112 sbuf_printf(sb, "noflags");
113 }
114
115 tdfirst = FIRST_THREAD_IN_PROC(p);
116 thread_lock(tdfirst);
117 if (tdfirst->td_wchan != NULL) {
118 KASSERT(tdfirst->td_wmesg != NULL,
119 ("wchan %p has no wmesg", tdfirst->td_wchan));
120 wmesg = tdfirst->td_wmesg;
121 } else
122 wmesg = "nochan";
123 thread_unlock(tdfirst);
124
125 PROC_STATLOCK(p);
126 calcru(p, &ut, &st);
127 PROC_STATUNLOCK(p);
128 start = p->p_stats->p_start;
129 getboottime(&boottime);
130 timevaladd(&start, &boottime);
131 sbuf_printf(sb, " %jd,%ld %jd,%ld %jd,%ld",
132 (intmax_t)start.tv_sec, start.tv_usec,
133 (intmax_t)ut.tv_sec, ut.tv_usec,
134 (intmax_t)st.tv_sec, st.tv_usec);
135
136 sbuf_printf(sb, " %s", wmesg);
137
138 cr = p->p_ucred;
139
140 sbuf_printf(sb, " %lu %lu %lu",
141 (u_long)cr->cr_uid,
142 (u_long)cr->cr_ruid,
143 (u_long)cr->cr_rgid);
144 sbuf_printf(sb, ",%lu", (u_long)cr->cr_gid);
145 for (i = 0; i < cr->cr_ngroups; i++)
146 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]);
147
148 if (jailed(cr)) {
149 mtx_lock(&cr->cr_prison->pr_mtx);
150 sbuf_printf(sb, " %s",
151 prison_name(td->td_ucred->cr_prison, cr->cr_prison));
152 mtx_unlock(&cr->cr_prison->pr_mtx);
153 } else {
154 sbuf_printf(sb, " -");
155 }
156 PROC_UNLOCK(p);
157 sbuf_printf(sb, "\n");
158
159 return (0);
160 }
161
162 int
procfs_doproccmdline(PFS_FILL_ARGS)163 procfs_doproccmdline(PFS_FILL_ARGS)
164 {
165
166 /*
167 * If we are using the ps/cmdline caching, use that. Otherwise
168 * read argv from the process space.
169 * Note that if the argv is no longer available, we deliberately
170 * don't fall back on p->p_comm or return an error: the authentic
171 * Linux behaviour is to return zero-length in this case.
172 */
173
174 PROC_LOCK(p);
175 if (p->p_args && p_cansee(td, p) == 0) {
176 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
177 PROC_UNLOCK(p);
178 return (0);
179 }
180
181 if ((p->p_flag & P_SYSTEM) != 0) {
182 PROC_UNLOCK(p);
183 return (0);
184 }
185
186 PROC_UNLOCK(p);
187
188 return (proc_getargv(td, p, sb));
189 }
190