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## compare_shells: dash bash mksh ash
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## oils_failures_allowed: 0
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# builtin-trap.test.sh
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trap -- 'echo hi' EXIT
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echo done
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## STDOUT:
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done
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hi
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## END
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trap 'echo hi' 9
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echo status=$?
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trap 'echo hi' KILL
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echo status=$?
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trap 'echo hi' STOP
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echo status=$?
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trap 'echo hi' TERM
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echo status=$?
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## STDOUT:
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status=0
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status=0
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status=0
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status=0
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## END
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## OK osh STDOUT:
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status=1
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status=1
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status=1
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status=0
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## END
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trap 'foo' SIGINVALID
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## status: 1
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trap - SIGINVALID
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## status: 1
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trap - SIGINT
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echo $?
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trap - INT
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echo $?
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## STDOUT:
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0
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0
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## END
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## N-I dash STDOUT:
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1
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0
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## END
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trap 'foo'
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echo status=$?
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## STDOUT:
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status=2
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## END
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## OK dash/ash STDOUT:
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status=1
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## END
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## BUG mksh STDOUT:
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status=0
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## END
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# All shells spew warnings to stderr, but don't actually exit! Bad!
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trap 'echo <' EXIT
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echo status=$?
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## STDOUT:
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status=1
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## END
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## BUG mksh status: 1
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## BUG mksh STDOUT:
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status=0
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## END
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## BUG ash status: 2
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## BUG ash STDOUT:
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status=0
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## END
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## BUG dash/bash status: 0
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## BUG dash/bash STDOUT:
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status=0
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## END
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cleanup() {
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echo "cleanup [$@]"
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exit 42
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}
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trap 'cleanup x y z' EXIT
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## stdout: cleanup [x y z]
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## status: 42
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cleanup() {
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echo "cleanup [$@]"
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return 42
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}
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trap 'cleanup x y z' EXIT
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## stdout: cleanup [x y z]
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## status: 0
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trap 'echo FAILED' EXIT
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for
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## stdout: FAILED
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## status: 2
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## OK mksh status: 1
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trap 'echo FAILED; exit 0' EXIT
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for
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## stdout: FAILED
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## status: 0
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trap 'echo IN TRAP; echo $stdout' EXIT
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stdout=FOO
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exit 42
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## status: 42
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## STDOUT:
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IN TRAP
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FOO
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## END
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trap 'echo EXIT TRAP' EXIT
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echo $(echo command sub)
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( echo subshell )
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echo pipeline | cat
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## STDOUT:
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command sub
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subshell
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pipeline
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EXIT TRAP
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## END
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# not sure why this is, but POSIX wants it.
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trap 'echo EXIT' 0
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echo status=$?
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trap - EXIT
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echo status=$?
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## status: 0
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## STDOUT:
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status=0
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status=0
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## END
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trap 'echo HUP' SIGHUP
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echo status=$?
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trap 'echo HUP' HUP
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echo status=$?
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trap 'echo HUP' 1
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echo status=$?
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trap - HUP
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echo status=$?
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## status: 0
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## STDOUT:
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status=0
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status=0
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status=0
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status=0
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## END
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## N-I dash STDOUT:
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status=1
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status=0
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status=0
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status=0
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## END
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trap 'eval "echo hi"' 0
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## STDOUT:
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hi
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## END
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trap 'echo USR1 trap status=$?; ( exit 42 )' USR1
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echo before=$?
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# Equivalent to 'kill -USR1 $$' except OSH doesn't have "kill" yet.
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# /bin/kill doesn't exist on Debian unless 'procps' is installed.
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sh -c "kill -USR1 $$"
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echo after=$?
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## STDOUT:
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before=0
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USR1 trap status=0
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after=0
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## END
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# Test with SIGURG because the default handler is SIG_IGN
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#
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# If we use SIGUSR1, I think the shell reverts to killing the process
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# https://man7.org/linux/man-pages/man7/signal.7.html
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trap 'echo SIGURG' URG
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kill -URG $$
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# Hm trap doesn't happen here
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{ echo begin child; sleep 0.1; echo end child; } &
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kill -URG $!
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wait
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echo "wait status $?"
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# In the CI, mksh sometimes gives:
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#
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# USR1
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# begin child
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# done
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#
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# leaving off 'end child'. This seems like a BUG to me?
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## STDOUT:
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SIGURG
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begin child
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end child
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wait status 0
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## END
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