procfs_status.c revision 331722
1/*- 2 * Copyright (c) 1993 Jan-Simon Pendry 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94 34 * 35 * From: 36 * $Id: procfs_status.c,v 3.1 1993/12/15 09:40:17 jsp Exp $ 37 * $FreeBSD: stable/11/sys/fs/procfs/procfs_status.c 331722 2018-03-29 02:50:57Z eadler $ 38 */ 39 40#include <sys/param.h> 41#include <sys/kernel.h> 42#include <sys/systm.h> 43#include <sys/exec.h> 44#include <sys/lock.h> 45#include <sys/mutex.h> 46#include <sys/jail.h> 47#include <sys/malloc.h> 48#include <sys/mutex.h> 49#include <sys/sx.h> 50#include <sys/proc.h> 51#include <sys/resourcevar.h> 52#include <sys/sbuf.h> 53#include <sys/sysent.h> 54#include <sys/tty.h> 55 56#include <vm/vm.h> 57#include <vm/pmap.h> 58#include <vm/vm_param.h> 59 60#include <fs/pseudofs/pseudofs.h> 61#include <fs/procfs/procfs.h> 62 63int 64procfs_doprocstatus(PFS_FILL_ARGS) 65{ 66 struct session *sess; 67 struct thread *tdfirst; 68 struct tty *tp; 69 struct ucred *cr; 70 const char *wmesg; 71 char *pc; 72 char *sep; 73 struct timeval boottime; 74 int pid, ppid, pgid, sid; 75 int i; 76 77 pid = p->p_pid; 78 PROC_LOCK(p); 79 ppid = p->p_pptr ? p->p_pptr->p_pid : 0; 80 pgid = p->p_pgrp->pg_id; 81 sess = p->p_pgrp->pg_session; 82 SESS_LOCK(sess); 83 sid = sess->s_leader ? sess->s_leader->p_pid : 0; 84 85/* comm pid ppid pgid sid tty ctty,sldr start ut st wmsg 86 euid ruid rgid,egid,groups[1 .. ngroups] 87*/ 88 89 pc = p->p_comm; 90 do { 91 if (*pc < 33 || *pc > 126 || *pc == '\\') 92 sbuf_printf(sb, "\\%03o", *pc); 93 else 94 sbuf_putc(sb, *pc); 95 } while (*++pc); 96 sbuf_printf(sb, " %d %d %d %d ", pid, ppid, pgid, sid); 97 if ((p->p_flag & P_CONTROLT) && (tp = sess->s_ttyp)) 98 sbuf_printf(sb, "%s ", devtoname(tp->t_dev)); 99 else 100 sbuf_printf(sb, "- "); 101 102 sep = ""; 103 if (sess->s_ttyvp) { 104 sbuf_printf(sb, "%sctty", sep); 105 sep = ","; 106 } 107 if (SESS_LEADER(p)) { 108 sbuf_printf(sb, "%ssldr", sep); 109 sep = ","; 110 } 111 SESS_UNLOCK(sess); 112 if (*sep != ',') { 113 sbuf_printf(sb, "noflags"); 114 } 115 116 tdfirst = FIRST_THREAD_IN_PROC(p); 117 thread_lock(tdfirst); 118 if (tdfirst->td_wchan != NULL) { 119 KASSERT(tdfirst->td_wmesg != NULL, 120 ("wchan %p has no wmesg", tdfirst->td_wchan)); 121 wmesg = tdfirst->td_wmesg; 122 } else 123 wmesg = "nochan"; 124 thread_unlock(tdfirst); 125 126 if (p->p_flag & P_INMEM) { 127 struct timeval start, ut, st; 128 129 PROC_STATLOCK(p); 130 calcru(p, &ut, &st); 131 PROC_STATUNLOCK(p); 132 start = p->p_stats->p_start; 133 getboottime(&boottime); 134 timevaladd(&start, &boottime); 135 sbuf_printf(sb, " %jd,%ld %jd,%ld %jd,%ld", 136 (intmax_t)start.tv_sec, start.tv_usec, 137 (intmax_t)ut.tv_sec, ut.tv_usec, 138 (intmax_t)st.tv_sec, st.tv_usec); 139 } else 140 sbuf_printf(sb, " -1,-1 -1,-1 -1,-1"); 141 142 sbuf_printf(sb, " %s", wmesg); 143 144 cr = p->p_ucred; 145 146 sbuf_printf(sb, " %lu %lu %lu", 147 (u_long)cr->cr_uid, 148 (u_long)cr->cr_ruid, 149 (u_long)cr->cr_rgid); 150 151 /* egid (cr->cr_svgid) is equal to cr_ngroups[0] 152 see also getegid(2) in /sys/kern/kern_prot.c */ 153 154 for (i = 0; i < cr->cr_ngroups; i++) { 155 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]); 156 } 157 158 if (jailed(cr)) { 159 mtx_lock(&cr->cr_prison->pr_mtx); 160 sbuf_printf(sb, " %s", 161 prison_name(td->td_ucred->cr_prison, cr->cr_prison)); 162 mtx_unlock(&cr->cr_prison->pr_mtx); 163 } else { 164 sbuf_printf(sb, " -"); 165 } 166 PROC_UNLOCK(p); 167 sbuf_printf(sb, "\n"); 168 169 return (0); 170} 171 172int 173procfs_doproccmdline(PFS_FILL_ARGS) 174{ 175 176 /* 177 * If we are using the ps/cmdline caching, use that. Otherwise 178 * read argv from the process space. 179 * Note that if the argv is no longer available, we deliberately 180 * don't fall back on p->p_comm or return an error: the authentic 181 * Linux behaviour is to return zero-length in this case. 182 */ 183 184 PROC_LOCK(p); 185 if (p->p_args && p_cansee(td, p) == 0) { 186 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length); 187 PROC_UNLOCK(p); 188 return (0); 189 } 190 191 if ((p->p_flag & P_SYSTEM) != 0) { 192 PROC_UNLOCK(p); 193 return (0); 194 } 195 196 PROC_UNLOCK(p); 197 198 return (proc_getargv(td, p, sb)); 199} 200