[asterisk-commits] debug utilities: Create the ast coredumper utility (asterisk[13])
SVN commits to the Asterisk project
asterisk-commits at lists.digium.com
Thu Jan 12 18:14:54 CST 2017
Anonymous Coward #1000019 has submitted this change and it was merged. ( https://gerrit.asterisk.org/4710 )
Change subject: debug_utilities: Create the ast_coredumper utility
......................................................................
debug_utilities: Create the ast_coredumper utility
This utility allows easy manipulation of asterisk coredumps.
* Configurable search paths and patterns for existing coredumps
* Can generate a consistent coredump from the running instance
* Can dump the lock_infos table from a coredump
* Dumps backtraces to separate files...
- thread apply 1 bt full -> <coredump>.thread1.txt
- thread apply all bt -> <coredump>.brief.txt
- thread apply all bt full -> <coredump>.full.txt
- lock_infos table -> <coredump>.locks.txt
* Can tarball corefiles and optionally delete them after processing
* Can tarball results files and optionally delete them after processing
* Converts ':' in coredump and results file names '-' to facilitate
uploading. Jira for instance, won't accept file names with colons
in them.
Tested on Fedora24+, Ubuntu14+, Debian6+, CentOS6+ and FreeBSD9+[1].
[1] For *BSDs, the "devel/gdb" package might have to be installed to
get a recent gdb. The utility will check all instances of gdb
it finds in $PATH and if one isn't found that can run python, it
prints a friendly error.
Change-Id: I935d37ab9db85ef923f32b05579897f0893d33cd
---
A configs/samples/ast_debug_tools.conf.sample
M contrib/Makefile
A contrib/scripts/ast_coredumper
3 files changed, 563 insertions(+), 1 deletion(-)
Approvals:
Mark Michelson: Looks good to me, but someone else must approve
Anonymous Coward #1000019: Verified
Joshua Colp: Looks good to me, approved
diff --git a/configs/samples/ast_debug_tools.conf.sample b/configs/samples/ast_debug_tools.conf.sample
new file mode 100644
index 0000000..90e976f
--- /dev/null
+++ b/configs/samples/ast_debug_tools.conf.sample
@@ -0,0 +1,40 @@
+#
+# This file is used by the Asterisk debug tools.
+# Unlike other Asterisk config files, this one is
+# "sourced" by bash and must adhere to bash semantics.
+#
+
+# A list of coredumps and/or coredump search patterns.
+# Bash extended globs are enabled and any resulting files
+# that aren't actually coredumps are silently ignored
+# so you can be liberal with the globs.
+#
+# If your patterns contains spaces be sure to only quote
+# the portion of the pattern that DOESN'T contain wildcard
+# expressions. If you quote the whole pattern, it won't
+# be expanded and the glob characters will be treated as
+# literals.
+#
+# The exclusion of files ending ".txt" is just for
+# demonstration purposes as non-coredumps will be ignored
+# anyway.
+COREDUMPS=(/tmp/core[-._]asterisk!(*.txt) /tmp/core[-._]$(hostname)!(*.txt))
+
+# Date command for the "running" coredump and tarballs.
+# DATEFORMAT will be executed to get the timestamp.
+# Don't put quotes around the format string or they'll be
+# treated as literal characters. Also be aware of colons
+# in the output as you can't upload files with colons in
+# the name to Jira.
+#
+# Unix timestamp
+#DATEFORMAT='date +%s.%N'
+#
+# Unix timestamp on *BSD/MacOS after installing coreutils
+#DATEFORMAT='gdate +%s.%N'
+#
+# Readable GMT
+#DATEFORMAT='date -u +%FT%H-%M-%S%z'
+#
+# Readable Local time
+DATEFORMAT='date +%FT%H-%M-%S%z'
diff --git a/contrib/Makefile b/contrib/Makefile
index 2c91b47..6c0c041 100644
--- a/contrib/Makefile
+++ b/contrib/Makefile
@@ -20,10 +20,12 @@
include $(ASTTOPDIR)/Makefile.rules
install:
+ $(INSTALL) -d "$(DESTDIR)$(ASTDATADIR)/scripts"
+ $(INSTALL) -m 755 scripts/ast_coredumper "$(DESTDIR)$(ASTDATADIR)/scripts/ast_coredumper"
if [ -n "$(findstring REF_DEBUG,$(MENUSELECT_CFLAGS))" ]; then \
- $(INSTALL) -d "$(DESTDIR)$(ASTDATADIR)/scripts"; \
$(INSTALL) -m 755 scripts/refcounter.py "$(DESTDIR)$(ASTDATADIR)/scripts/refcounter.py"; \
fi
uninstall:
+ rm -f "$(DESTDIR)$(ASTDATADIR)/scripts/ast_coredumper"
rm -f "$(DESTDIR)$(ASTDATADIR)/scripts/refcounter.py"
diff --git a/contrib/scripts/ast_coredumper b/contrib/scripts/ast_coredumper
new file mode 100755
index 0000000..c82732b
--- /dev/null
+++ b/contrib/scripts/ast_coredumper
@@ -0,0 +1,520 @@
+#!/usr/bin/env bash
+# Turn on extended globbing
+shopt -s extglob
+# Bail on any error
+set -e
+
+prog=$(basename $0)
+
+print_help() {
+cat <<EOF
+NAME
+ $prog - Dump and/or format asterisk coredump files
+
+SYNOPSIS
+ $prog [ --help ] [ --running | --RUNNING ] [ --latest ]
+ [ --tarball-coredumps ] [ --delete-coredumps-after ]
+ [ --tarball-results ] [ --delete-results-after ]
+ [ --no-default-search ] [ --append-coredumps ]
+ [ <coredump> | <pattern> ... ]
+
+DESCRIPTION
+
+ Extracts backtraces and lock tables from Asterisk coredump files.
+ For each coredump found, 4 new result files are created:
+ - <coredump>.brief.txt: The output of "thread apply all bt".
+
+ - <coredump>.thread1.txt: The output of "thread apply 1 bt full".
+
+ - <coredump>.full.txt: The output of "thread apply all bt full".
+
+ - <coredump>.locks.txt: If asterisk was compiled with
+ "DEBUG_THREADS", this file will contain a dump of the locks
+ table similar to doing a "core show locks" from the asterisk
+ CLI.
+
+ Optional features:
+ - The running asterisk process can be suspended and dumped.
+ - The coredumps can be merged into a tarball.
+ - The coredumps can be deleted after processing.
+ - The results files can be merged into a tarball.
+ - The results files can be deleted after processing.
+
+ Options:
+
+ --help
+ Print this help.
+
+ --running
+ Create a coredump from the running asterisk instance and
+ process it along with any other coredumps found (if any).
+ WARNING: This WILL interrupt call processing. You will be
+ asked to confirm.
+
+ --RUNNING
+ Same as --running but without the confirmation prompt.
+ DANGEROUS!!
+
+ --latest
+ Process only the latest coredump from those specified (based
+ on last-modified time). If a dump of the running process was
+ requested, it is always included in addition to the latest
+ from the existing coredumps.
+
+ --tarball-coredumps
+ Creates a gzipped tarball of all coredumps processed.
+ The tarball name will be:
+ /tmp/asterisk.<timestamp>.coredumps.tar.gz
+
+ --delete-coredumps-after
+ Deletes all processed coredumps regardless of whether
+ a tarball was created.
+
+ --tarball-results
+ Creates a gzipped tarball of all result files produced.
+ The tarball name will be:
+ /tmp/asterisk.<timestamp>.results.tar.gz
+
+ --delete-results-after
+ Deletes all processed results regardless of whether
+ a tarball was created. It probably doesn't make sense
+ to use this option unless you have also specified
+ --tarball-results.
+
+ --no-default-search
+ Ignore COREDUMPS from the config files and process only
+ coredumps listed on the command line (if any) and/or
+ the running asterisk instance (if requested).
+
+ --append-coredumps
+ Append any coredumps specified on the command line to the
+ config file specified ones instead of overriding them.
+
+ <coredump> | <pattern>
+ A list of coredumps or coredump search patterns. Unless
+ --append-coredumps was specified, these entries will override
+ those specified in the config files.
+
+ Any resulting file that isn't actually a coredump is silently
+ ignored. If your patterns contains spaces be sure to only
+ quote the portion of the pattern that DOESN'T contain wildcard
+ expressions. If you quote the whole pattern, it won't be
+ expanded.
+
+ If --no-default-search is specified and no files are specified
+ on the command line, then the only the running asterisk process
+ will be dumped (if requested). Otherwise if no files are
+ specified on the command line the value of COREDUMPS from
+ ast_debug_tools.conf will be used. Failing that, the following
+ patterns will be used:
+ /tmp/core[-._]asterisk!(*.txt)
+ /tmp/core[-._]\$(hostname)!(*.txt)
+
+NOTES
+ The script relies on not only bash, but also recent GNU date and
+ gdb with python support. *BSD operating systems may require
+ installation of the 'coreutils' and 'devel/gdb' packagess and minor
+ tweaking of the ast_debug_tools.conf file.
+
+ Any files output will have ':' characters changed to '-'. This is
+ to facilitate uploading those files to Jira which doesn't like the
+ colons.
+
+FILES
+ /etc/asterisk/ast_debug_tools.conf
+ ~/ast_debug_tools.conf
+ ./ast_debug_tools.conf
+
+ #
+ # This file is used by the Asterisk debug tools.
+ # Unlike other Asterisk config files, this one is
+ # "sourced" by bash and must adhere to bash semantics.
+ #
+
+ # A list of coredumps and/or coredump search patterns.
+ # Bash extended globs are enabled and any resulting files
+ # that aren't actually coredumps are silently ignored
+ # so you can be liberal with the globs.
+ #
+ # If your patterns contains spaces be sure to only quote
+ # the portion of the pattern that DOESN'T contain wildcard
+ # expressions. If you quote the whole pattern, it won't
+ # be expanded and the glob characters will be treated as
+ # literals.
+ #
+ # The exclusion of files ending ".txt" is just for
+ # demonstration purposes as non-coredumps will be ignored
+ # anyway.
+ COREDUMPS=(/tmp/core[-._]asterisk!(*.txt) /tmp/core[-._]\$(hostname)!(*.txt))
+
+ # Date command for the "running" coredump and tarballs.
+ # DATEFORMAT will be executed to get the timestamp.
+ # Don't put quotes around the format string or they'll be
+ # treated as literal characters. Also be aware of colons
+ # in the output as you can't upload files with colons in
+ # the name to Jira.
+ #
+ # Unix timestamp
+ #DATEFORMAT='date +%s.%N'
+ #
+ # *BSD/MacOS doesn't support %N but after installing GNU
+ # coreutils...
+ #DATEFORMAT='gdate +%s.%N'
+ #
+ # Readable GMT
+ #DATEFORMAT='date -u +%FT%H-%M-%S%z'
+ #
+ # Readable Local time
+ DATEFORMAT='date +%FT%H-%M-%S%z'
+
+EOF
+ exit 1
+}
+
+running=false
+RUNNING=false
+latest=false
+tarball_coredumps=false
+delete_coredumps_after=false
+tarball_results=false
+delete_results_after=false
+append_coredumps=false
+
+declare -a COREDUMPS
+declare -a ARGS_COREDUMPS
+
+# Read config files from least important to most important
+[ -f /etc/asterisk/ast_debug_tools.conf ] && source /etc/asterisk/ast_debug_tools.conf
+[ -f ~/ast_debug_tools.conf ] && source ~/ast_debug_tools.conf
+[ -f ./ast_debug_tools.conf ] && source ./ast_debug_tools.conf
+
+# For *BSD, the preferred gdb may be in /usr/local/bin so we
+# need to search for one that supports python.
+for g in $(which -a gdb) ; do
+ result=$($g --batch --ex "python print('hello')" 2>/dev/null || : )
+ if [[ "$result" =~ ^hello$ ]] ; then
+ GDB=$g
+ break
+ fi
+done
+
+if [ -z "$GDB" ] ; then
+ echo "No suitable gdb was found in $PATH"
+ exit 1
+fi
+
+if [ ${#COREDUMPS[@]} -eq 0 ] ; then
+ COREDUMPS+=(/tmp/core[-._]asterisk!(*.txt) /tmp/core[-._]$(hostname)!(*.txt))
+fi
+
+DATEFORMAT=${DATEFORMAT:-'date +%FT%H-%M-%S%z'}
+
+# Use "$@" (with the quotes) so spaces in patterns or
+# file names are preserved.
+# Later on when we have to iterate over COREDUMPS, we always
+# use the indexes rather than trying to expand the values of COREDUMPS
+# just in case.
+
+for a in "$@" ; do
+ case "$a" in
+ --running)
+ running=true
+ ;;
+ --RUNNING)
+ RUNNING=true
+ ;;
+ --no-default-search)
+ # Clean out COREDUMPS from config files
+ COREDUMPS=()
+ ;;
+ --latest)
+ latest=true
+ ;;
+ --tarball-coredumps)
+ tarball_coredumps=true
+ ;;
+ --delete-coredumps-after)
+ delete_coredumps_after=true
+ ;;
+ --tarball-results)
+ tarball_results=true
+ ;;
+ --delete-results-after)
+ delete_results_after=true
+ ;;
+ --append-coredumps)
+ append_coredumps=true
+ ;;
+ --help|-*)
+ print_help
+ ;;
+ *)
+ ARGS_COREDUMPS+=("$a")
+ # If any files are specified on the command line, ignore those
+ # specified in the config files unless append-coredumps was specified.
+ if ! $append_coredumps ; then
+ COREDUMPS=()
+ fi
+ esac
+done
+
+# append coredumps/patterns specified as command line arguments to COREDUMPS.
+for i in ${!ARGS_COREDUMPS[@]} ; do
+ COREDUMPS+=("${ARGS_COREDUMPS[$i]}")
+done
+
+# At this point, all glob entries that match files should be expanded.
+# Any entries that don't exist are probably globs that didn't match anything
+# and need to be pruned. Any non coredumps are also pruned.
+
+for i in ${!COREDUMPS[@]} ; do
+ if [ ! -f "${COREDUMPS[$i]}" ] ; then
+ unset COREDUMPS[$i]
+ continue
+ fi
+ # Some versions of 'file' don't allow only the first n bytes of the
+ # file to be processed so we use dd to grab just the first 32 bytes.
+ mimetype=$(dd if="${COREDUMPS[$i]}" bs=32 count=1 2>/dev/null | file -bi -)
+ if [[ ! "$mimetype" =~ coredump ]] ; then
+ unset COREDUMPS[$i]
+ continue
+ fi
+done
+
+# Sort and weed out any dups
+IFS=$'\x0a'
+readarray -t COREDUMPS < <(echo -n "${COREDUMPS[*]}" | sort -u )
+unset IFS
+
+# If --latest, get the last modified timestamp of each file,
+# sort them, then return the latest.
+if [ ${#COREDUMPS[@]} -gt 0 ] && $latest ; then
+ lf=$(find "${COREDUMPS[@]}" -printf '%T@ %p\n' | sort -n | tail -1)
+ COREDUMPS=("${lf#* }")
+fi
+
+# Timestamp to use for output files
+df=$(${DATEFORMAT})
+
+if $running || $RUNNING ; then
+ # We need to go through some gyrations to find the pid of the running
+ # MAIN asterisk process and not someone or something running asterisk -r.
+ # The pid file may NOT be in /var/run/asterisk so we need to find any
+ # running asterisk process and see if -C was specified on the command
+ # line. The chances of more than 1 asterisk instance running with
+ # different -C options is so unlikely that we're going to ignore it.
+ #
+ # 'ps axo command' should work on Linux (back to CentOS6) and FreeBSD.
+ # If asterisk was started with -C, get the asterisk.conf file.
+ # If it wasn't, assume /etc/asterisk/asterisk.conf
+ astetcconf=`ps axo command | sed -n -r -e "s/.*asterisk\s+.*-C\s+([^ ]+).*/\1/gp" | tail -1`
+ [ x$astetcconf = x ] && astetcconf=/etc/asterisk/asterisk.conf
+ # Now parse out astrundir and cat asterisk.pid
+ astrundir=$(sed -n -r -e "s/astrundir\s+[=>]+\s+(.*)/\1/gp" $astetcconf)
+ pid=$(cat $astrundir/asterisk.pid 2>/dev/null || : )
+ if [ x$pid = x ] ; then
+ echo "Asterisk is not running"
+ else
+ if $RUNNING ; then
+ answer=Y
+ else
+ read -p "WARNING: Taking a core dump of the running asterisk instance will suspend call processing while the dump is saved. Do you wish to continue? (y/N) " answer
+ fi
+ if [[ "$answer" =~ ^[Yy] ]] ; then
+ cf="/tmp/core.asterisk.running.$df"
+ # We want a consistent coredump so stop the process
+ # and continue it after the dump is complete.
+ # kill -STOP $pid
+ ${GDB} -p $pid -q --batch --ex "gcore $cf" >/dev/null 2>&1
+ # kill -CONT $pid
+ COREDUMPS+=("$cf")
+ else
+ echo "Skipping dump of running process"
+ fi
+ fi
+fi
+
+if [ "${#COREDUMPS[@]}" -eq 0 ] ; then
+ echo "No coredumps found"
+ print_help
+fi
+
+# Extract the gdb scripts from the end of this script
+# and save them to /tmp/.gdbinit
+
+ss=`egrep -n "^#@@@SCRIPTSTART@@@" $0 |cut -f1 -d:`
+tail -n +${ss} $0 >/tmp/.gdbinit
+
+# Now iterate over the coredumps and dump the debugging info
+for i in ${!COREDUMPS[@]} ; do
+ cf=${COREDUMPS[$i]}
+ echo "Processing $cf"
+ ${GDB} -n --batch -q --ex "source /tmp/.gdbinit" $(which asterisk) "$cf" 2>/dev/null | (
+ of=/dev/null
+ while IFS= read line ; do
+ if [[ "$line" =~ !@!@!@!\ ([^\ ]+)\ !@!@!@! ]] ; then
+ of=$cf.${BASH_REMATCH[1]}
+ of=${of//:/-}
+ rm -f "$of"
+ echo "Creating $of"
+ fi
+ echo -e $"$line" >> "$of"
+ done
+ )
+done
+
+if $tarball_coredumps ; then
+ tf=/tmp/asterisk.$df.coredumps.tar
+ echo "Creating $tf.gz"
+ for i in ${!COREDUMPS[@]} ; do
+ tar -uvf $tf "${COREDUMPS[@]}" 2>/dev/null
+ done
+ gzip $tf
+fi
+
+if $delete_coredumps_after ; then
+ for i in ${!COREDUMPS[@]} ; do
+ rm -rf "${COREDUMPS[$i]}"
+ done
+fi
+
+if $tarball_results ; then
+ tf=/tmp/asterisk.$df.results.tar
+ echo "Creating $tf.gz"
+ for i in ${!COREDUMPS[@]} ; do
+ tar -uvf $tf "${COREDUMPS[$i]//:/-}".{brief,full,thread1,locks}.txt 2>/dev/null
+ done
+ gzip $tf
+fi
+
+if $delete_results_after ; then
+ for i in ${!COREDUMPS[@]} ; do
+ rm -rf "${COREDUMPS[$i]//:/-}".{brief,full,thread1,locks}.txt
+ done
+fi
+
+exit
+
+# Be careful editng the inline scripts.
+# They're space-indented.
+
+# We need the python bit because lock_infos isn't
+# a valid symbol in asterisk unless DEBUG_THREADS was
+# used during the compile. Also, interrupt and continue
+# are only valid for a running program.
+
+#@@@SCRIPTSTART@@@
+python
+class DumpAsteriskCommand(gdb.Command):
+
+ def __init__(self):
+ super(DumpAsteriskCommand, self).__init__ ("dump-asterisk",
+ gdb.COMMAND_OBSCURE, gdb.COMPLETE_COMMAND)
+
+ def invoke(self, arg, from_tty):
+ try:
+ gdb.execute("interrupt", from_tty)
+ except:
+ pass
+ print("!@!@!@! thread1.txt !@!@!@!\n")
+ try:
+ gdb.execute("thread apply 1 bt full", from_tty)
+ except:
+ pass
+ print("!@!@!@! brief.txt !@!@!@!\n")
+ try:
+ gdb.execute("thread apply all bt", from_tty)
+ except:
+ pass
+ print("!@!@!@! full.txt !@!@!@!\n")
+ try:
+ gdb.execute("thread apply all bt full", from_tty)
+ except:
+ pass
+ print("!@!@!@! locks.txt !@!@!@!\n")
+ try:
+ gdb.execute("show_locks", from_tty)
+ except:
+ pass
+ try:
+ gdb.execute("continue", from_tty)
+ except:
+ pass
+
+DumpAsteriskCommand ()
+end
+
+define show_locks
+ set $n = lock_infos.first
+
+ if $argc == 0
+ printf " where_held count-|\n"
+ printf " suspended-| |\n"
+ printf " type- | times locked-| | |\n"
+ printf "thread status file line function lock name | lock addr | | |\n"
+ else
+ printf "thread,status,file,line,function,lock_name,lock_type,lock_addr,times_locked,suspended,where_held_count,where_held_file,where_held_line,where_held_function,there_held_thread\n"
+ end
+
+ while $n
+ if $n->num_locks > 0
+ set $i = 0
+ while $i < $n->num_locks
+ if $n->locks[$i]->suspended == 0
+ if ((ast_mutex_t *)$n->locks[$i]->lock_addr)->tracking
+ if $n->locks[$i]->type > 0
+ set $track = ((ast_rwlock_t *)$n->locks[$i]->lock_addr)->track
+ else
+ set $track = ((ast_mutex_t *)$n->locks[$i]->lock_addr)->track
+ end
+ end
+ set $reentrancy = $track->reentrancy
+ set $pending = $n->locks[$i]->pending
+ if $argc > 0
+ printf "%p,%d,%s,%d,%s,%s,%d,%p,%d,%d,%d",\
+ $n->thread_id, $n->locks[$i]->pending, $n->locks[$i]->file, $n->locks[$i]->line_num, $n->locks[$i]->func,\
+ $n->locks[$i]->lock_name, $n->locks[$i]->type, $n->locks[$i]->lock_addr, $n->locks[$i]->times_locked,\
+ $n->locks[$i]->suspended, $track->reentrancy
+ if $reentrancy
+ if $pending
+ printf ",%s,%d,%s,%p", $track->file[0], $track->lineno[0], $track->func[0], $track->thread[0]
+ end
+ end
+ else
+ if $n->locks[$i]->pending < 0
+ printf "%p failed %-20s %6d %-36s %-20s %d %14p %3d %d %d",\
+ $n->thread_id,\
+ $n->locks[$i]->file, $n->locks[$i]->line_num, $n->locks[$i]->func,\
+ $n->locks[$i]->lock_name, $n->locks[$i]->type, $n->locks[$i]->lock_addr, $n->locks[$i]->times_locked,\
+ $n->locks[$i]->suspended, $track->reentrancy
+ end
+ if $n->locks[$i]->pending == 0
+ printf "%p holding %-20s %6d %-36s %-20s %d %14p %3d %d %d",\
+ $n->thread_id,\
+ $n->locks[$i]->file, $n->locks[$i]->line_num, $n->locks[$i]->func,\
+ $n->locks[$i]->lock_name, $n->locks[$i]->type, $n->locks[$i]->lock_addr, $n->locks[$i]->times_locked,\
+ $n->locks[$i]->suspended, $track->reentrancy
+ end
+ if $n->locks[$i]->pending > 0
+ printf "%p waiting %-20s %6d %-36s %-20s %d %14p %3d %d %d",\
+ $n->thread_id,\
+ $n->locks[$i]->file, $n->locks[$i]->line_num, $n->locks[$i]->func,\
+ $n->locks[$i]->lock_name, $n->locks[$i]->type, $n->locks[$i]->lock_addr, $n->locks[$i]->times_locked,\
+ $n->locks[$i]->suspended, $track->reentrancy
+ end
+ if $reentrancy
+ if $pending
+ printf "\n held at: %-20s %6d %-36s by 0x%08lx", $track->file[0], $track->lineno[0], $track->func[0], $track->thread_id[0]
+ end
+ end
+ end
+ printf "\n"
+ end
+ set $i = $i + 1
+ end
+ end
+ set $n = $n->entry->next
+ end
+end
+
+dump-asterisk
--
To view, visit https://gerrit.asterisk.org/4710
To unsubscribe, visit https://gerrit.asterisk.org/settings
Gerrit-MessageType: merged
Gerrit-Change-Id: I935d37ab9db85ef923f32b05579897f0893d33cd
Gerrit-PatchSet: 2
Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-Owner: George Joseph <gjoseph at digium.com>
Gerrit-Reviewer: Anonymous Coward #1000019
Gerrit-Reviewer: Joshua Colp <jcolp at digium.com>
Gerrit-Reviewer: Mark Michelson <mmichelson at digium.com>
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