#!/bin/sh

# bail out if there's no "mail" command
type mail >/dev/null 2>&1 || exit 0

# Redirect all output to our mail command
(
	# We must be given a pid to look at
	if [ -z "$1" ]; then
		echo "$0 called with no arguments."
		exit 1
	fi

	if [ ! -d "/proc/$1" ]; then
		echo "$0: No such process: $1"
		exit 1
	fi

	# Find out what binary we're debugging
	BINARYNAME=`readlink "/proc/$1/exe"`

	# Generic header for our email
	echo "The Samba 'panic action' script, $0,"
	echo "was called for PID $1 ($BINARYNAME)."
	echo

	echo "This means there was a problem with the program, such as a segfault."

	if [ -z "$BINARYNAME" ]; then
		echo "However, the executable could not be found for process $1."
		echo "It may have died unexpectedly, or you may not have permission to debug"
		echo "the process."
		exit 1
	fi

	# No debugger
	if [ ! -x /usr/bin/gdb ]; then
		echo "However, gdb was not found on your system, so the error could not be"
		echo "debugged.  Please install the gdb package so that debugging information"
		echo "is available the next time such a problem occurs."
		exit 1
	fi

	echo "Below is a backtrace for this process generated with gdb, which shows"
	echo "the state of the program at the time the error occurred.  The Samba log"
	echo "files may contain additional information about the problem."
	echo 
	echo "If the problem persists, you are encouraged to first install the"
	echo "samba-dbgsym package, which contains the debugging symbols for the Samba"
	echo "binaries.  Then submit the provided information as a bug report to"
	if [ -x "`which lsb_release 2>/dev/null`" ] \
	   && [ "`lsb_release -s -i`" = "Ubuntu" ]
	then
		echo "Ubuntu by visiting this link:"
		echo "https://launchpad.net/ubuntu/+source/samba/+filebug"
	else
		echo "Debian.  For information about the procedure for submitting bug reports,"
		echo "please see http://www.debian.org/Bugs/Reporting or the reportbug(1)"
		echo "manual page."
	fi
	echo
	gdb -x /etc/samba/gdbcommands -batch "$BINARYNAME" "$1"
) | mail -s "Panic or segfault in Samba" root