procfs_status.c revision 113620
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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94 38 * 39 * From: 40 * $Id: procfs_status.c,v 3.1 1993/12/15 09:40:17 jsp Exp $ 41 * $FreeBSD: head/sys/fs/procfs/procfs_status.c 113620 2003-04-17 22:16:58Z jhb $ 42 */ 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/exec.h> 47#include <sys/lock.h> 48#include <sys/mutex.h> 49#include <sys/jail.h> 50#include <sys/malloc.h> 51#include <sys/mutex.h> 52#include <sys/sx.h> 53#include <sys/proc.h> 54#include <sys/resourcevar.h> 55#include <sys/sbuf.h> 56#include <sys/sysent.h> 57#include <sys/tty.h> 58 59#include <vm/vm.h> 60#include <vm/pmap.h> 61#include <vm/vm_param.h> 62 63#include <fs/pseudofs/pseudofs.h> 64#include <fs/procfs/procfs.h> 65 66int 67procfs_doprocstatus(PFS_FILL_ARGS) 68{ 69 struct session *sess; 70 struct thread *tdfirst; 71 struct tty *tp; 72 struct ucred *cr; 73 const char *wmesg; 74 char *pc; 75 char *sep; 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 maj,min 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, "%d,%d ", major(tp->t_dev), minor(tp->t_dev)); 101 else 102 sbuf_printf(sb, "%d,%d ", -1, -1); 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 mtx_lock_spin(&sched_lock); 119 if (p->p_flag & P_THREADED) 120 wmesg = "-kse- "; 121 else { 122 tdfirst = FIRST_THREAD_IN_PROC(p); 123 if (tdfirst->td_wchan != NULL) { 124 KASSERT(tdfirst->td_wmesg != NULL, 125 ("wchan %p has no wmesg", tdfirst->td_wchan)); 126 wmesg = tdfirst->td_wmesg; 127 } else 128 wmesg = "nochan"; 129 } 130 131 if (p->p_sflag & PS_INMEM) { 132 struct timeval ut, st; 133 134 calcru(p, &ut, &st, (struct timeval *) NULL); 135 mtx_unlock_spin(&sched_lock); 136 sbuf_printf(sb, " %lld,%ld %ld,%ld %ld,%ld", 137 (long long)p->p_stats->p_start.tv_sec, 138 p->p_stats->p_start.tv_usec, 139 ut.tv_sec, ut.tv_usec, 140 st.tv_sec, st.tv_usec); 141 } else { 142 mtx_unlock_spin(&sched_lock); 143 sbuf_printf(sb, " -1,-1 -1,-1 -1,-1"); 144 } 145 146 sbuf_printf(sb, " %s", wmesg); 147 148 cr = p->p_ucred; 149 150 sbuf_printf(sb, " %lu %lu %lu", 151 (u_long)cr->cr_uid, 152 (u_long)cr->cr_ruid, 153 (u_long)cr->cr_rgid); 154 155 /* egid (cr->cr_svgid) is equal to cr_ngroups[0] 156 see also getegid(2) in /sys/kern/kern_prot.c */ 157 158 for (i = 0; i < cr->cr_ngroups; i++) { 159 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]); 160 } 161 162 if (jailed(p->p_ucred)) { 163 mtx_lock(&p->p_ucred->cr_prison->pr_mtx); 164 sbuf_printf(sb, " %s", p->p_ucred->cr_prison->pr_host); 165 mtx_unlock(&p->p_ucred->cr_prison->pr_mtx); 166 } else { 167 sbuf_printf(sb, " -"); 168 } 169 PROC_UNLOCK(p); 170 sbuf_printf(sb, "\n"); 171 172 return (0); 173} 174 175int 176procfs_doproccmdline(PFS_FILL_ARGS) 177{ 178 struct ps_strings pstr; 179 int error, i; 180 181 /* 182 * If we are using the ps/cmdline caching, use that. Otherwise 183 * revert back to the old way which only implements full cmdline 184 * for the currept process and just p->p_comm for all other 185 * processes. 186 * Note that if the argv is no longer available, we deliberately 187 * don't fall back on p->p_comm or return an error: the authentic 188 * Linux behaviour is to return zero-length in this case. 189 */ 190 191 PROC_LOCK(p); 192 if (p->p_args && (ps_argsopen || !p_cansee(td, p))) { 193 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length); 194 PROC_UNLOCK(p); 195 return (0); 196 } 197 PROC_UNLOCK(p); 198 if (p != td->td_proc) { 199 sbuf_printf(sb, "%.*s", MAXCOMLEN, p->p_comm); 200 } else { 201 error = copyin((void *)p->p_sysent->sv_psstrings, &pstr, 202 sizeof(pstr)); 203 if (error) 204 return (error); 205 for (i = 0; i < pstr.ps_nargvstr; i++) { 206 sbuf_copyin(sb, pstr.ps_argvstr[i], 0); 207 sbuf_printf(sb, "%c", '\0'); 208 } 209 } 210 211 return (0); 212} 213