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 session *sess; 65 struct thread *tdfirst; 66 struct tty *tp; 67 struct ucred *cr; 68 const char *wmesg; 69 char *pc; 70 char *sep; 71 struct timeval boottime; 72 int pid, ppid, pgid, sid; 73 int i; 74 75 pid = p->p_pid; 76 PROC_LOCK(p); 77 ppid = p->p_pptr ? p->p_pptr->p_pid : 0; 78 pgid = p->p_pgrp->pg_id; 79 sess = p->p_pgrp->pg_session; 80 SESS_LOCK(sess); 81 sid = sess->s_leader ? sess->s_leader->p_pid : 0; 82 83 /* comm pid ppid pgid sid tty ctty,sldr start ut st wmsg 84 euid ruid rgid,egid,groups[1 .. ngroups] 85 */ 86 87 pc = p->p_comm; 88 do { 89 if (*pc < 33 || *pc > 126 || *pc == '\\') 90 sbuf_printf(sb, "\\%03o", *pc); 91 else 92 sbuf_putc(sb, *pc); 93 } while (*++pc); 94 sbuf_printf(sb, " %d %d %d %d ", pid, ppid, pgid, sid); 95 if ((p->p_flag & P_CONTROLT) && (tp = sess->s_ttyp)) 96 sbuf_printf(sb, "%s ", devtoname(tp->t_dev)); 97 else 98 sbuf_printf(sb, "- "); 99 100 sep = ""; 101 if (sess->s_ttyvp) { 102 sbuf_printf(sb, "%sctty", sep); 103 sep = ","; 104 } 105 if (SESS_LEADER(p)) { 106 sbuf_printf(sb, "%ssldr", sep); 107 sep = ","; 108 } 109 SESS_UNLOCK(sess); 110 if (*sep != ',') { 111 sbuf_printf(sb, "noflags"); 112 } 113 114 tdfirst = FIRST_THREAD_IN_PROC(p); 115 thread_lock(tdfirst); 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 thread_unlock(tdfirst); 123 124 if (p->p_flag & P_INMEM) { 125 struct timeval start, ut, st; 126 127 PROC_STATLOCK(p); 128 calcru(p, &ut, &st); 129 PROC_STATUNLOCK(p); 130 start = p->p_stats->p_start; 131 getboottime(&boottime); 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 } 169 170 int 171 procfs_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