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# 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
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