0304c73163
by creating a child jail, which is visible to that jail and to any parent jails. Child jails may be restricted more than their parents, but never less. Jail names reflect this hierarchy, being MIB-style dot-separated strings. Every thread now points to a jail, the default being prison0, which contains information about the physical system. Prison0's root directory is the same as rootvnode; its hostname is the same as the global hostname, and its securelevel replaces the global securelevel. Note that the variable "securelevel" has actually gone away, which should not cause any problems for code that properly uses securelevel_gt() and securelevel_ge(). Some jail-related permissions that were kept in global variables and set via sysctls are now per-jail settings. The sysctls still exist for backward compatibility, used only by the now-deprecated jail(2) system call. Approved by: bz (mentor)
218 lines
5.9 KiB
C
218 lines
5.9 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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* 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/kernel.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/sysent.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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const char *wmesg;
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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 tty 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, "%s ", devtoname(tp->t_dev));
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else
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sbuf_printf(sb, "- ");
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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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tdfirst = FIRST_THREAD_IN_PROC(p);
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if (tdfirst->td_wchan != NULL) {
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KASSERT(tdfirst->td_wmesg != NULL,
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("wchan %p has no wmesg", tdfirst->td_wchan));
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wmesg = tdfirst->td_wmesg;
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} else
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wmesg = "nochan";
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if (p->p_flag & P_INMEM) {
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struct timeval start, ut, st;
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PROC_SLOCK(p);
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calcru(p, &ut, &st);
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PROC_SUNLOCK(p);
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start = p->p_stats->p_start;
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timevaladd(&start, &boottime);
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sbuf_printf(sb, " %jd,%ld %jd,%ld %jd,%ld",
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(intmax_t)start.tv_sec, start.tv_usec,
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(intmax_t)ut.tv_sec, ut.tv_usec,
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(intmax_t)st.tv_sec, st.tv_usec);
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} else
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sbuf_printf(sb, " -1,-1 -1,-1 -1,-1");
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sbuf_printf(sb, " %s", wmesg);
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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(cr)) {
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mtx_lock(&cr->cr_prison->pr_mtx);
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sbuf_printf(sb, " %s",
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prison_name(td->td_ucred->cr_prison, cr->cr_prison));
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mtx_unlock(&cr->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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char **ps_argvstr;
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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 && p_cansee(td, p) == 0) {
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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 *)p->p_sysent->sv_psstrings, &pstr,
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sizeof(pstr));
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if (error)
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return (error);
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if (pstr.ps_nargvstr > ARG_MAX)
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return (E2BIG);
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ps_argvstr = malloc(pstr.ps_nargvstr * sizeof(char *),
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M_TEMP, M_WAITOK);
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error = copyin((void *)pstr.ps_argvstr, ps_argvstr,
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pstr.ps_nargvstr * sizeof(char *));
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if (error) {
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free(ps_argvstr, M_TEMP);
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return (error);
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}
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for (i = 0; i < pstr.ps_nargvstr; i++) {
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sbuf_copyin(sb, ps_argvstr[i], 0);
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sbuf_printf(sb, "%c", '\0');
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}
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free(ps_argvstr, M_TEMP);
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}
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return (0);
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}
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