procfs_status.c revision 293473
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/10/sys/fs/procfs/procfs_status.c 293473 2016-01-09 14:08:10Z dchagin $ 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 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 if (p->p_flag & P_INMEM) { 126 struct timeval start, ut, st; 127 128 PROC_STATLOCK(p); 129 calcru(p, &ut, &st); 130 PROC_STATUNLOCK(p); 131 start = p->p_stats->p_start; 132 timevaladd(&start, &boottime); 133 sbuf_printf(sb, " %jd,%ld %jd,%ld %jd,%ld", 134 (intmax_t)start.tv_sec, start.tv_usec, 135 (intmax_t)ut.tv_sec, ut.tv_usec, 136 (intmax_t)st.tv_sec, st.tv_usec); 137 } else 138 sbuf_printf(sb, " -1,-1 -1,-1 -1,-1"); 139 140 sbuf_printf(sb, " %s", wmesg); 141 142 cr = p->p_ucred; 143 144 sbuf_printf(sb, " %lu %lu %lu", 145 (u_long)cr->cr_uid, 146 (u_long)cr->cr_ruid, 147 (u_long)cr->cr_rgid); 148 149 /* egid (cr->cr_svgid) is equal to cr_ngroups[0] 150 see also getegid(2) in /sys/kern/kern_prot.c */ 151 152 for (i = 0; i < cr->cr_ngroups; i++) { 153 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]); 154 } 155 156 if (jailed(cr)) { 157 mtx_lock(&cr->cr_prison->pr_mtx); 158 sbuf_printf(sb, " %s", 159 prison_name(td->td_ucred->cr_prison, cr->cr_prison)); 160 mtx_unlock(&cr->cr_prison->pr_mtx); 161 } else { 162 sbuf_printf(sb, " -"); 163 } 164 PROC_UNLOCK(p); 165 sbuf_printf(sb, "\n"); 166 167 return (0); 168} 169 170int 171procfs_doproccmdline(PFS_FILL_ARGS) 172{ 173 174 /* 175 * If we are using the ps/cmdline caching, use that. Otherwise 176 * read argv from the process space. 177 * Note that if the argv is no longer available, we deliberately 178 * don't fall back on p->p_comm or return an error: the authentic 179 * Linux behaviour is to return zero-length in this case. 180 */ 181 182 PROC_LOCK(p); 183 if (p->p_args && p_cansee(td, p) == 0) { 184 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length); 185 PROC_UNLOCK(p); 186 return (0); 187 } 188 189 if ((p->p_flag & P_SYSTEM) != 0) { 190 PROC_UNLOCK(p); 191 return (0); 192 } 193 194 PROC_UNLOCK(p); 195 196 return (proc_getargv(td, p, sb)); 197} 198