procfs_status.c revision 227104
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: head/sys/fs/procfs/procfs_status.c 227104 2011-11-05 09:04:13Z kib $ 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 if (tdfirst->td_wchan != NULL) { 117 KASSERT(tdfirst->td_wmesg != NULL, 118 ("wchan %p has no wmesg", tdfirst->td_wchan)); 119 wmesg = tdfirst->td_wmesg; 120 } else 121 wmesg = "nochan"; 122 123 if (p->p_flag & P_INMEM) { 124 struct timeval start, ut, st; 125 126 PROC_SLOCK(p); 127 calcru(p, &ut, &st); 128 PROC_SUNLOCK(p); 129 start = p->p_stats->p_start; 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 } else 136 sbuf_printf(sb, " -1,-1 -1,-1 -1,-1"); 137 138 sbuf_printf(sb, " %s", wmesg); 139 140 cr = p->p_ucred; 141 142 sbuf_printf(sb, " %lu %lu %lu", 143 (u_long)cr->cr_uid, 144 (u_long)cr->cr_ruid, 145 (u_long)cr->cr_rgid); 146 147 /* egid (cr->cr_svgid) is equal to cr_ngroups[0] 148 see also getegid(2) in /sys/kern/kern_prot.c */ 149 150 for (i = 0; i < cr->cr_ngroups; i++) { 151 sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]); 152 } 153 154 if (jailed(cr)) { 155 mtx_lock(&cr->cr_prison->pr_mtx); 156 sbuf_printf(sb, " %s", 157 prison_name(td->td_ucred->cr_prison, cr->cr_prison)); 158 mtx_unlock(&cr->cr_prison->pr_mtx); 159 } else { 160 sbuf_printf(sb, " -"); 161 } 162 PROC_UNLOCK(p); 163 sbuf_printf(sb, "\n"); 164 165 return (0); 166} 167 168int 169procfs_doproccmdline(PFS_FILL_ARGS) 170{ 171 struct ps_strings pstr; 172 char **ps_argvstr; 173 int error, i; 174 175 /* 176 * If we are using the ps/cmdline caching, use that. Otherwise 177 * revert back to the old way which only implements full cmdline 178 * for the current process and just p->p_comm for all other 179 * processes. 180 * Note that if the argv is no longer available, we deliberately 181 * don't fall back on p->p_comm or return an error: the authentic 182 * Linux behaviour is to return zero-length in this case. 183 */ 184 185 PROC_LOCK(p); 186 if (p->p_args && p_cansee(td, p) == 0) { 187 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length); 188 PROC_UNLOCK(p); 189 return (0); 190 } 191 PROC_UNLOCK(p); 192 if (p != td->td_proc) { 193 sbuf_printf(sb, "%.*s", MAXCOMLEN, p->p_comm); 194 } else { 195 error = copyin((void *)p->p_sysent->sv_psstrings, &pstr, 196 sizeof(pstr)); 197 if (error) 198 return (error); 199 if (pstr.ps_nargvstr > ARG_MAX) 200 return (E2BIG); 201 ps_argvstr = malloc(pstr.ps_nargvstr * sizeof(char *), 202 M_TEMP, M_WAITOK); 203 error = copyin((void *)pstr.ps_argvstr, ps_argvstr, 204 pstr.ps_nargvstr * sizeof(char *)); 205 if (error) { 206 free(ps_argvstr, M_TEMP); 207 return (error); 208 } 209 for (i = 0; i < pstr.ps_nargvstr; i++) { 210 sbuf_copyin(sb, ps_argvstr[i], 0); 211 sbuf_printf(sb, "%c", '\0'); 212 } 213 free(ps_argvstr, M_TEMP); 214 } 215 216 return (0); 217} 218