Date: Sat, 26 Jan 2008 07:37:20 GMT From: Scot Hetzel <swhetzel@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/119995: [patch] New rc.d script ddb to load ddb scripts from /etc/ddb.conf Message-ID: <200801260737.m0Q7bKAc023770@www.freebsd.org> Resent-Message-ID: <200801260740.m0Q7e1gs050919@freefall.freebsd.org>
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>Number: 119995
>Category: bin
>Synopsis: [patch] New rc.d script ddb to load ddb scripts from /etc/ddb.conf
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Jan 26 07:40:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Scot Hetzel
>Release: 8.0-CURRENT
>Organization:
>Environment:
FreeBSD hp010.hetzel.org 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Sat Jan 19 00:03:54 CST 2008 root@hp010.hetzel.org:/usr/src/sys/amd64/compile/DV8135NR amd64
>Description:
Currently, ddb scripts can only be loaded after the login prompt is shown and the administrator has logged into a system. There is no mechanism to load a ddb script at boot time.
The attach patch solves this problem by creating /etc/rc.d/ddb. rc.d/ddb then reads the ddb scripts from /etc/ddb.conf and uses /sbin/ddb to create each script.
The format of the ddb.conf file is:
<scriptname>=<scriptvalue>
<scriptname> must be less than 32 characters (31 max)
<scriptvalue> must be less than 120 characters (119 max)
<scriptvalue>=<ddb command>[; <ddb command>]||[; run <script name>]...
To get around the 119 character limit, define a script that is run from the main script as shown below:
lockinfo=show locks; show alllocks; show lockedvnods
kdb.enter.panic=textdump set; capture on; bt; run lockinfo; capture off; call doadump; reset
NOTE: These limits are releate to ddb scripting and not the rc.d/ddb script.
>How-To-Repeat:
Boot computer then use /sbin/ddb script to load each script individually.
>Fix:
The attached patch creates a /etc/rc.d/ddb script that reads /etc/ddb.conf to load the ddb scripts after the dump device has been defined.
Patch attached with submission follows:
Index: etc/Makefile
===================================================================
RCS file: /home/ncvs/src/etc/Makefile,v
retrieving revision 1.365
diff -u -r1.365 Makefile
--- etc/Makefile 11 Nov 2007 01:16:51 -0000 1.365
+++ etc/Makefile 26 Jan 2008 06:43:34 -0000
@@ -7,8 +7,8 @@
SUBDIR= sendmail
.endif
BIN1= amd.map apmd.conf auth.conf \
- crontab csh.cshrc csh.login csh.logout devd.conf devfs.conf \
+ crontab csh.cshrc csh.login csh.logout ddb.conf devd.conf devfs.conf \
dhclient.conf disktab fbtab freebsd-update.conf \
ftpusers gettytab group \
hosts hosts.allow hosts.equiv hosts.lpd \
@@ -207,7 +207,7 @@
.if ${MK_SENDMAIL} != "no"
mtree -deU ${MTREE_FOLLOWS_SYMLINKS} -f ${.CURDIR}/mtree/BSD.sendmail.dist -p ${DESTDIR}/
.endif
- cd ${DESTDIR}/; rm -f ${DESTDIR}/sys; ln -s usr/src/sys sys
+ cd ${DESTDIR}/; rm -f ${DESTDIR}/sys; ln -s ${SYSDIR} sys
cd ${DESTDIR}/usr/share/man/en.ISO8859-1; ln -sf ../man* .
cd ${DESTDIR}/usr/share/man; \
set - `grep "^[a-zA-Z]" ${.CURDIR}/man.alias`; \
Index: etc/ddb.conf
===================================================================
RCS file: etc/ddb.conf
diff -N etc/ddb.conf
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ etc/ddb.conf 26 Jan 2008 06:42:16 -0000
@@ -0,0 +1,14 @@
+# $FreeBSD$
+#
+# This file is read when going to multi-user and its contents piped thru
+# ``ddb'' to define debugging scripts.
+#
+# see ``man 4 ddb'' and ``man 8 ddb'' for details.
+#
+
+
+lockinfo=show locks; show alllocks; show lockedvnods
+
+# kdb.enter.panic panic(9) was called.
+#kdb.enter.panic=textdump set; capture on; run lockinfo; show pcpu; bt; ps; alltrace; capture off; call doadump; reset
+
Index: etc/rc.d/Makefile
===================================================================
RCS file: /home/ncvs/src/etc/rc.d/Makefile,v
retrieving revision 1.88
diff -u -r1.88 Makefile
--- etc/rc.d/Makefile 8 Dec 2007 07:20:22 -0000 1.88
+++ etc/rc.d/Makefile 26 Jan 2008 06:47:23 -0000
@@ -7,7 +7,7 @@
apm apmd archdep atm1 atm2 atm3 auditd auto_linklocal \
bgfsck bluetooth bootparams bridge bsnmpd bthidd \
ccd cleanvar cleartmp cron \
- devd devfs dhclient \
+ ddb devd devfs dhclient \
dmesg dumpon \
early.sh encswap \
fsck ftp-proxy ftpd \
Index: etc/rc.d/ddb
===================================================================
RCS file: etc/rc.d/ddb
diff -N etc/rc.d/ddb
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ etc/rc.d/ddb 26 Jan 2008 06:37:35 -0000
@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: ddb
+# REQUIRE: dumpon
+# BEFORE: disks savecore initrandom
+# KEYWORD: nojail
+
+. /etc/rc.subr
+
+name="ddb"
+stop_cmd=":"
+start_cmd="ddb_start"
+reload_cmd="ddb_start"
+extra_commands="reload"
+
+ddb_start()
+{
+ #
+ # Read in /etc/sysctl.conf and set things accordingly
+ #
+ if [ -f /etc/ddb.conf ]; then
+ while read var
+ do
+ case ${var} in
+ \#*|'')
+ ;;
+ *)
+ mib=${var%=*}
+ val=${var#*=}
+
+ /sbin/ddb script ${mib}="${val}"
+ ;;
+ esac
+ done < /etc/ddb.conf
+ fi
+}
+
+load_rc_config $name
+run_rc_command "$1"
>Release-Note:
>Audit-Trail:
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