#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# test the trap code

trap 'echo exiting' 0
trap 'echo aborting' HUP INT QUIT ABRT TERM

# make sure a user-specified subshell runs the exit trap, but does not
# inherit the exit trap from a parent shell
( trap 'echo subshell exit' 0; exit 0 )
( exit 0 )

trap

func()
{
	trap 'echo ${FUNCNAME:-$0}[$LINENO] funcdebug' DEBUG
	echo funcdebug line
}

trap 'echo [$LINENO] debug' DEBUG
echo debug line

trap

func

trap

trap 'echo ${FUNCNAME:-$0}[$LINENO] debug' DEBUG
func2()
{
	echo func2debug line
}
declare -ft func2
func2

unset -f func2

trap '' DEBUG

trap

trap - debug

trap

trap - HUP
trap hup
trap '' INT
trap '' int

trap

# exit 0 in exit trap should set exit status
(
set -e
trap 'exit 0' EXIT
false   
echo bad
)
echo $?

# hmmm...should this set the handling to SIG_IGN for children, too?
trap '' USR2
./trap1.sub
trap - USR2

# test ERR trap
./trap2.sub

${THIS_SH} ./trap3.sub

${THIS_SH} ./trap4.sub

# This doesn't work right on all Unix versions
#${THIS_SH} ./trap5.sub

# Return trap issues
${THIS_SH} ./trap6.sub

# eval and ERR trap
${THIS_SH} ./trap7.sub

# SIGCHLD traps
${THIS_SH} ./trap8.sub

# return without argument in trap string 
${THIS_SH} ./trap9.sub

#
# show that setting a trap on SIGCHLD is not disastrous.
#
set -o monitor

trap 'echo caught a child death' SIGCHLD

sleep 7 & sleep 6 & sleep 5 &

# this will only catch the first, since there's a trap on SIGCHLD
wait

trap -p SIGCHLD
trap -P SIGCHLD

# all errors
trap -p -P 
trap -P
trap ''
trap -x

# Now reset some of the signals the shell handles specially back to
# their default values (with or without the SIG prefix)
trap - SIGINT QUIT TERM

trap

trap - SIGCHLD
wait

trap 512	# error
trap 0		# revert
trap -p EXIT

trap 'echo exiting' 0
trap -P EXIT

exit
