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 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); 144 145 /* egid (cr->cr_svgid) is equal to cr_ngroups[0] 146 see also getegid(2) in /sys/kern/kern_prot.c */ 147 148 for (i = 0; i < cr->cr_ngroups; i++) { 149 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]); 150 } 151 152 if (jailed(cr)) { 153 mtx_lock(&cr->cr_prison->pr_mtx); 154 sbuf_printf(sb, " %s", 155 prison_name(td->td_ucred->cr_prison, cr->cr_prison)); 156 mtx_unlock(&cr->cr_prison->pr_mtx); 157 } else { 158 sbuf_printf(sb, " -"); 159 } 160 PROC_UNLOCK(p); 161 sbuf_printf(sb, "\n"); 162 163 return (0); 164 } 165 166 int 167 procfs_doproccmdline(PFS_FILL_ARGS) 168 { 169 170 /* 171 * If we are using the ps/cmdline caching, use that. Otherwise 172 * read argv from the process space. 173 * Note that if the argv is no longer available, we deliberately 174 * don't fall back on p->p_comm or return an error: the authentic 175 * Linux behaviour is to return zero-length in this case. 176 */ 177 178 PROC_LOCK(p); 179 if (p->p_args && p_cansee(td, p) == 0) { 180 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length); 181 PROC_UNLOCK(p); 182 return (0); 183 } 184 185 if ((p->p_flag & P_SYSTEM) != 0) { 186 PROC_UNLOCK(p); 187 return (0); 188 } 189 190 PROC_UNLOCK(p); 191 192 return (proc_getargv(td, p, sb)); 193 } 194