f44d9e24fb
pointer instead of a proc pointer and require the process pointed to by the second argument to be locked. We now use the thread ucred reference for the credential checks in p_can*() as a result. p_canfoo() should now no longer need Giant.
205 lines
5.8 KiB
C
205 lines
5.8 KiB
C
/*
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* Copyright (c) 1993 Jan-Simon Pendry
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
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*
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* From:
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* $Id: procfs_status.c,v 3.1 1993/12/15 09:40:17 jsp Exp $
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/exec.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/jail.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/proc.h>
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#include <sys/resourcevar.h>
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#include <sys/sbuf.h>
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#include <sys/tty.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_param.h>
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#include <fs/pseudofs/pseudofs.h>
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#include <fs/procfs/procfs.h>
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int
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procfs_doprocstatus(PFS_FILL_ARGS)
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{
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struct session *sess;
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struct thread *tdfirst;
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struct tty *tp;
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struct ucred *cr;
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char *pc;
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char *sep;
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int pid, ppid, pgid, sid;
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int i;
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pid = p->p_pid;
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PROC_LOCK(p);
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ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
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pgid = p->p_pgrp->pg_id;
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sess = p->p_pgrp->pg_session;
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SESS_LOCK(sess);
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sid = sess->s_leader ? sess->s_leader->p_pid : 0;
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/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg
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euid ruid rgid,egid,groups[1 .. NGROUPS]
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*/
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pc = p->p_comm;
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do {
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if (*pc < 33 || *pc > 126 || *pc == '\\')
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sbuf_printf(sb, "\\%03o", *pc);
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else
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sbuf_putc(sb, *pc);
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} while (*++pc);
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sbuf_printf(sb, " %d %d %d %d ", pid, ppid, pgid, sid);
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if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
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sbuf_printf(sb, "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
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else
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sbuf_printf(sb, "%d,%d ", -1, -1);
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sep = "";
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if (sess->s_ttyvp) {
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sbuf_printf(sb, "%sctty", sep);
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sep = ",";
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}
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if (SESS_LEADER(p)) {
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sbuf_printf(sb, "%ssldr", sep);
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sep = ",";
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}
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SESS_UNLOCK(sess);
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if (*sep != ',') {
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sbuf_printf(sb, "noflags");
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}
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mtx_lock_spin(&sched_lock);
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if (p->p_sflag & PS_INMEM) {
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struct timeval ut, st;
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calcru(p, &ut, &st, (struct timeval *) NULL);
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mtx_unlock_spin(&sched_lock);
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sbuf_printf(sb, " %lld,%ld %ld,%ld %ld,%ld",
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(long long)p->p_stats->p_start.tv_sec,
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p->p_stats->p_start.tv_usec,
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ut.tv_sec, ut.tv_usec,
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st.tv_sec, st.tv_usec);
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} else {
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mtx_unlock_spin(&sched_lock);
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sbuf_printf(sb, " -1,-1 -1,-1 -1,-1");
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}
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if (p->p_flag & P_KSES)
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sbuf_printf(sb, " %s", "-kse- ");
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else {
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tdfirst = FIRST_THREAD_IN_PROC(p); /* XXX diff from td? */
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sbuf_printf(sb, " %s",
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(tdfirst->td_wchan && tdfirst->td_wmesg) ?
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tdfirst->td_wmesg : "nochan");
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}
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cr = p->p_ucred;
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sbuf_printf(sb, " %lu %lu %lu",
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(u_long)cr->cr_uid,
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(u_long)cr->cr_ruid,
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(u_long)cr->cr_rgid);
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/* egid (cr->cr_svgid) is equal to cr_ngroups[0]
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see also getegid(2) in /sys/kern/kern_prot.c */
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for (i = 0; i < cr->cr_ngroups; i++) {
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sbuf_printf(sb, ",%lu", (u_long)cr->cr_groups[i]);
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}
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if (jailed(p->p_ucred)) {
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mtx_lock(&p->p_ucred->cr_prison->pr_mtx);
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sbuf_printf(sb, " %s", p->p_ucred->cr_prison->pr_host);
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mtx_unlock(&p->p_ucred->cr_prison->pr_mtx);
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} else {
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sbuf_printf(sb, " -");
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}
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PROC_UNLOCK(p);
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sbuf_printf(sb, "\n");
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return (0);
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}
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int
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procfs_doproccmdline(PFS_FILL_ARGS)
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{
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struct ps_strings pstr;
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int error, i;
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/*
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* If we are using the ps/cmdline caching, use that. Otherwise
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* revert back to the old way which only implements full cmdline
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* for the currept process and just p->p_comm for all other
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* processes.
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* Note that if the argv is no longer available, we deliberately
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* don't fall back on p->p_comm or return an error: the authentic
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* Linux behaviour is to return zero-length in this case.
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*/
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PROC_LOCK(p);
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if (p->p_args && (ps_argsopen || !p_cansee(td, p))) {
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sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
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PROC_UNLOCK(p);
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return (0);
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}
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PROC_UNLOCK(p);
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if (p != td->td_proc) {
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sbuf_printf(sb, "%.*s", MAXCOMLEN, p->p_comm);
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} else {
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error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
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if (error)
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return (error);
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for (i = 0; i < pstr.ps_nargvstr; i++) {
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sbuf_copyin(sb, pstr.ps_argvstr[i], 0);
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sbuf_printf(sb, "%c", '\0');
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}
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}
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return (0);
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}
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