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Code Issues Releases Activity

o Add jls(8) for listing active jails.

Browse Source 
o Add jexec(8) to execute a command in an existing jail.
o Add -j option for killall(1) to kill all processes in a specified
  jail.
o Add -i option to jail(8) to output jail ID of newly created jail.
This commit is contained in:
Mike Barcroft 2003-04-09 03:04:12 +00:00
parent 94d079eb1f
commit ebf5d9bc2c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113277
11 changed files with 320 additions and 24 deletions
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9
usr.bin/killall/killall.1
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 25, 1995
.Dd April 8, 2003
.Os
.Dt KILLALL 1
.Sh NAME
@ -39,6 +39,7 @@
.Op Fl m
.Op Fl s
.Op Fl z
.Op Fl j Ar jid
.Op Fl u Ar user
.Op Fl t Ar tty
.Op Fl c Ar procname
@ -89,6 +90,9 @@ The signal may be specified either as a name
(with or without a leading
.Dv SIG ) ,
or numerically.
.It Fl j Ar jid
Kill processes in the jail specified by
.Ar jid .
.It Fl u Ar user
Limit potentially matching processes to those belonging to
the specified
@ -133,7 +137,8 @@ Diagnostic messages will only be printed if requested by
options.
.Sh SEE ALSO
.Xr kill 1 ,
.Xr sysctl 3
.Xr sysctl 3 ,
.Xr jail 8
.Sh HISTORY
The
.Nm

23
usr.bin/killall/killall.c
View File

@ -29,6 +29,7 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/jail.h>
#include <sys/stat.h>
#include <sys/user.h>
#include <sys/sysctl.h>
@ -49,7 +50,9 @@ static void __dead2
usage(void)
{
fprintf(stderr, "usage: killall [-l] [-v] [-m] [-sig] [-u user] [-t tty] [-c cmd] [cmd]...\n");
fprintf(stderr, "usage: killall [-l] [-v] [-m] [-sig] [-j jid]\n");
fprintf(stderr,
" [-u user] [-t tty] [-c cmd] [cmd]...\n");
fprintf(stderr, "At least one option or argument to specify processes must be given.\n");
exit(1);
}
@ -110,6 +113,7 @@ main(int ac, char **av)
int vflag = 0;
int sflag = 0;
int dflag = 0;
int jflag = 0;
int mflag = 0;
int zflag = 0;
uid_t uid = 0;
@ -122,6 +126,7 @@ main(int ac, char **av)
const char *const *p;
char *ep;
int errors = 0;
int jid;
int mib[4];
size_t miblen;
int st, nprocs;
@ -142,6 +147,18 @@ main(int ac, char **av)
if (**av == '-') {
++*av;
switch (**av) {
case 'j':
++*av;
if (**av == '\0')
++av;
--ac;
jflag++;
jid = strtol(*av, &ep, 10);
if (!*av || *ep)
errx(1, "illegal jid: %s", *av);
if (jail_attach(jid) == -1)
err(1, "jail_attach(): %d", jid);
break;
case 'u':
++*av;
if (**av == '\0')
@ -206,7 +223,7 @@ main(int ac, char **av)
}
}
if (user == NULL && tty == NULL && cmd == NULL && ac == 0)
if (user == NULL && tty == NULL && cmd == NULL && !jflag && ac == 0)
usage();
if (tty) {
@ -324,6 +341,8 @@ main(int ac, char **av)
matched = 0;
}
}
if (jflag && thispid == getpid())
matched = 0;
if (matched == 0)
continue;
if (ac > 0)

2
usr.sbin/Makefile
View File

@ -45,6 +45,8 @@ SUBDIR= IPXrouted \
inetd \
iostat \
jail \
jexec \
jls \
kbdcontrol \
kbdmap \
kernbb \

34
usr.sbin/jail/jail.8
View File

@ -33,7 +33,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd December 12, 2001
.Dd April 8, 2003
.Dt JAIL 8
.Os
.Sh NAME
@ -41,6 +41,7 @@
.Nd "imprison process and its descendants"
.Sh SYNOPSIS
.Nm
.Op Fl i
.Op Fl u Ar username
.Ar path hostname ip-number command ...
.Sh DESCRIPTION
@ -50,6 +51,8 @@ utility imprisons a process and all future descendants.
.Pp
The options are as follows:
.Bl -tag -width ".Fl u Ar username"
.It Fl i
Output the jail identifier of the newly created jail.
.It Fl u Ar username
The user name as whom the
.Ar command
@ -275,6 +278,9 @@ and other processes running within the jail using
with the
.Ql J
flag appearing beside jailed processes.
To see an active list of jails, use the
.Xr jls 8
utility.
You should also be able to
.Xr telnet 1
to the hostname or IP address of the jailed environment, and log
@ -304,12 +310,16 @@ Depending on
the intended use of the jail, you may also want to run
.Pa /etc/rc.shutdown
from within the jail.
Currently there is no way to insert new processes
into a jail, so you must first log into the jail before performing these
actions.
To kill processes from outside the jail, use the
.Xr jexec 8
utility in conjuction with the one of the
.Xr kill 1
commands above, or use the
.Xr killall 1
utility with the
.Fl j
option.
.Pp
To kill processes from outside the jail, you must individually identify the
PID of each process to be killed.
The
.Pa /proc/ Ns Ar pid Ns Pa /status
file contains, as its last field, the hostname of the jail in which the
@ -335,11 +345,6 @@ Just add the following line to
.Pa /etc/sysctl.conf :
.Pp
.Dl security.jail.set_hostname_allowed=0
.Pp
In a future version of
.Fx ,
the mechanisms for managing jails will be
more refined.
.Ss "Sysctl MIB Entries"
Certain aspects of the jail containments environment may be modified from
the host environment using
@ -388,15 +393,19 @@ As such, this functionality is disabled by default, but can be enabled
by setting this MIB entry to 1.
.El
.Sh SEE ALSO
.Xr killall 1 ,
.Xr newaliases 1 ,
.Xr ps 1 ,
.Xr chroot 2 ,
.Xr jail 2 ,
.Xr jail_attach 2 ,
.Xr procfs 5 ,
.Xr rc.conf 5 ,
.Xr sysctl.conf 5 ,
.Xr halt 8 ,
.Xr inetd 8 ,
.Xr jexec 8 ,
.Xr jls 8 ,
.Xr mount_devfs 8 ,
.Xr named 8 ,
.Xr reboot 8 ,
@ -423,8 +432,7 @@ who contributed it to
wrote the extended documentation, found a few bugs, added
a few new features, and cleaned up the userland jail environment.
.Sh BUGS
Jail currently lacks strong management functionality, such as the ability
to deliver signals to all processes in a jail, and to allow access to
Jail currently lacks the ability to allow access to
specific jail information via
.Xr ps 1
as opposed to

21
usr.sbin/jail/jail.c
View File

@ -34,20 +34,24 @@ main(int argc, char **argv)
struct jail j;
struct passwd *pwd;
struct in_addr in;
int ch, groups[NGROUPS], ngroups;
int ch, groups[NGROUPS], i, iflag, ngroups;
char *username;
iflag = 0;
username = NULL;
while ((ch = getopt(argc, argv, "u:")) != -1)
while ((ch = getopt(argc, argv, "iu:")) != -1) {
switch (ch) {
case 'i':
iflag = 1;
break;
case 'u':
username = optarg;
break;
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
if (argc < 4)
@ -73,8 +77,11 @@ main(int argc, char **argv)
if (inet_aton(argv[2], &in) == 0)
errx(1, "Could not make sense of ip-number: %s", argv[2]);
j.ip_number = ntohl(in.s_addr);
if (jail(&j) != 0)
i = jail(&j);
if (i == -1)
err(1, "jail");
if (iflag)
printf("%d\n", i);
if (username != NULL) {
if (setgroups(ngroups, groups) != 0)
err(1, "setgroups");
@ -87,14 +94,14 @@ main(int argc, char **argv)
}
if (execv(argv[3], argv + 3) != 0)
err(1, "execv: %s", argv[3]);
exit (0);
exit(0);
}
static void
usage(void)
{
(void)fprintf(stderr, "%s\n",
"Usage: jail [-u username] path hostname ip-number command ...");
(void)fprintf(stderr,
"usage: jail [-i] [-u username] path hostname ip-number command ...\n");
exit(1);
}

7
usr.sbin/jexec/Makefile Normal file
View File

@ -0,0 +1,7 @@
# $FreeBSD$
PROG= jexec
MAN= jexec.8
WARNS?= 6
.include <bsd.prog.mk>

52
usr.sbin/jexec/jexec.8 Normal file
View File

@ -0,0 +1,52 @@
.\"
.\" Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd April 8, 2003
.Dt JEXEC 8
.Os
.Sh NAME
.Nm jexec
.Nd "excute a command inside an existing jail"
.Sh SYNOPSIS
.Nm
.Ar jid command ...
.Sh DESCRIPTION
The
.Nm
utility excutes
.Ar command
inside the jail identified by,
.Ar jid.
.Sh SEE ALSO
.Xr jail_attach 2 ,
.Xr jail 8 ,
.Xr jls 8
.Sh HISTORY
The
.Nm
utility was added in
.Fx 5.1 .

62
usr.sbin/jexec/jexec.c Normal file
View File

@ -0,0 +1,62 @@
/*-
* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/jail.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static void usage(void);
int
main(int argc, char *argv[])
{
int jid;
if (argc < 3)
usage();
jid = (int)strtol(argv[1], NULL, 10);
if (jail_attach(jid) == -1)
err(1, "jail_attach(): %d", jid);
if (chdir("/") == -1)
err(1, "chdir(): /");
if (execv(argv[2], argv + 2) == -1)
err(1, "execv(): %s", argv[2]);
exit(0);
}
static void
usage(void)
{
fprintf(stderr, "usage: jexec jid command [...]\n");
exit(1);
}

7
usr.sbin/jls/Makefile Normal file
View File

@ -0,0 +1,7 @@
# $FreeBSD$
PROG= jls
MAN= jls.8
WARNS?= 6
.include <bsd.prog.mk>

50
usr.sbin/jls/jls.8 Normal file
View File

@ -0,0 +1,50 @@
.\"
.\" Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd April 8, 2003
.Dt JLS 8
.Os
.Sh NAME
.Nm jls
.Nd "list active jails"
.Sh SYNOPSIS
.Nm
.Sh DESCRIPTION
The
.Nm
utility lists all active jails.
Each jail is represented by one row which contains the following columns:
jail identifier (JID), IP address, hostname, and path.
.Sh SEE ALSO
.Xr jail 2 ,
.Xr jail 8 ,
.Xr jexec 8
.Sh HISTORY
The
.Nm
utility was added in
.Fx 5.1 .

77
usr.sbin/jls/jls.c Normal file
View File

@ -0,0 +1,77 @@
/*-
* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/jail.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
int
main(void)
{
struct xprison *sxp, *xp;
struct in_addr in;
size_t i, len;
if (sysctlbyname("security.jail.list", NULL, &len, NULL, 0) == -1)
err(1, "sysctlbyname(): security.jail.list");
retry:
if (len <= 0)
exit(0);
sxp = xp = calloc(len, 1);
if (sxp == NULL)
err(1, "malloc()");
if (sysctlbyname("security.jail.list", xp, &len, NULL, 0) == -1) {
if (errno == ENOMEM) {
free(sxp);
goto retry;
}
err(1, "sysctlbyname(): security.jail.list", NULL);
}
if (len < sizeof(*xp) || len % sizeof(*xp) ||
xp->pr_version != XPRISON_VERSION)
errx(1, "Kernel and userland out of sync");
printf(" JID IP Address Hostname Path\n");
for (i = 0; i < len / sizeof(*xp); i++) {
in.s_addr = ntohl(xp->pr_ip);
printf("%6d %-12.12s %-29.29s %.77s\n",
xp->pr_id, inet_ntoa(in), xp->pr_host, xp->pr_path);
xp++;
}
free(sxp);
exit(0);
}