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# builtin-trap.test.sh |
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|
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#### trap accepts/ignores -- |
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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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|
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#### trap 'echo hi' KILL (regression test, caught by smoosh suite) |
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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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|
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#### Register invalid trap |
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trap 'foo' SIGINVALID |
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## status: 1 |
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|
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#### Remove invalid trap |
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trap - SIGINVALID |
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## status: 1 |
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|
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#### SIGINT and INT are aliases |
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trap - SIGINT |
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echo $? |
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trap - INT |
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echo $? |
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## STDOUT: |
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0 |
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0 |
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## END |
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## N-I dash STDOUT: |
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1 |
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0 |
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## END |
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|
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#### Invalid trap invocation |
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trap 'foo' |
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echo status=$? |
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## stdout: status=2 |
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## OK dash stdout: status=1 |
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## BUG mksh stdout: status=0 |
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|
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#### exit 1 when trap code string is invalid |
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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=$? |
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## stdout: status=1 |
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## BUG mksh status: 1 |
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## BUG mksh stdout: status=0 |
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## BUG dash/bash status: 0 |
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## BUG dash/bash stdout: status=0 |
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|
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#### trap EXIT calling exit |
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cleanup() { |
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echo "cleanup [$@]" |
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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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|
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#### trap EXIT return status ignored |
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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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|
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#### trap EXIT with PARSE error |
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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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|
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#### trap EXIT with PARSE error and explicit exit |
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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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|
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#### trap EXIT with explicit exit |
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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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|
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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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|
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#### trap EXIT with command sub / subshell / pipeline |
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trap 'echo EXIT TRAP' EXIT |
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|
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echo $(echo command sub) |
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|
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( echo subshell ) |
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|
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echo pipeline | cat |
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|
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## STDOUT: |
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command sub |
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subshell |
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pipeline |
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EXIT TRAP |
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## END |
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|
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#### trap ERR |
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err() { |
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echo "err [$@] $?" |
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} |
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trap 'err x y' ERR |
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|
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echo A |
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|
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false |
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echo B |
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|
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( exit 42 ) |
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echo C |
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|
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trap - ERR # disable trap |
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|
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false |
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echo D |
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|
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trap 'echo after errexit $?' ERR |
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|
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set -o errexit |
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|
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( exit 99 ) |
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echo E |
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|
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## status: 99 |
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## STDOUT: |
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A |
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err [x y] 1 |
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B |
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err [x y] 42 |
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C |
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D |
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after errexit 99 |
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## END |
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## N-I dash STDOUT: |
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A |
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B |
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C |
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D |
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## END |
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|
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#### trap ERR and pipelines (lastpipe and PIPESTATUS difference) |
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case $SH in dash) exit ;; esac |
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|
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err() { |
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echo "err [$@] status=$? [${PIPESTATUS[@]}]" |
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} |
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trap 'err' ERR |
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|
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echo A |
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|
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false |
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|
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# succeeds |
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echo B | grep B |
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|
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# fails |
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echo C | grep zzz |
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|
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echo D | grep zzz | cat |
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|
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set -o pipefail |
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echo E | grep zzz | cat |
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|
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trap - ERR # disable trap |
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|
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echo F | grep zz |
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echo ok |
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|
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## STDOUT: |
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A |
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err [] status=1 [1] |
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B |
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err [] status=1 [0 1] |
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err [] status=1 [0 1 0] |
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ok |
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## END |
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|
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# lastpipe semantics mean we get another call! |
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# also we don't set PIPESTATUS unless we get a pipeline |
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|
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## OK osh STDOUT: |
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A |
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err [] status=1 [] |
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B |
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err [] status=1 [0 0] |
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err [] status=1 [0 1] |
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err [] status=1 [0 1 0] |
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ok |
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## END |
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|
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## N-I dash STDOUT: |
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## END |
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|
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#### error in trap ERR (recursive) |
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case $SH in dash) exit ;; esac |
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|
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err() { |
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echo err status $? |
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( exit 2 ) |
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} |
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trap 'err' ERR |
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|
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echo A |
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false |
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echo B |
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|
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## STDOUT: |
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A |
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err status 1 |
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B |
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## END |
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## N-I dash STDOUT: |
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## END |
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|
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#### trap 0 is equivalent to EXIT |
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# not sure why this is, but POSIX wants it. |
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trap 'echo EXIT' 0 |
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echo status=$? |
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trap - EXIT |
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echo status=$? |
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## status: 0 |
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## STDOUT: |
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status=0 |
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status=0 |
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## END |
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|
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#### trap 1 is equivalent to SIGHUP; HUP is equivalent to SIGHUP |
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trap 'echo HUP' SIGHUP |
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echo status=$? |
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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=$? |
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## status: 0 |
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## STDOUT: |
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status=0 |
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status=0 |
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status=0 |
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status=0 |
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## END |
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## N-I dash STDOUT: |
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status=1 |
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status=0 |
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status=0 |
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status=0 |
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## END |
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|
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#### eval in the exit trap (regression for issue #293) |
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trap 'eval "echo hi"' 0 |
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## STDOUT: |
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hi |
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## END |
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|
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|
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#### exit codes for traps are isolated |
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|
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trap 'echo USR1 trap status=$?; ( exit 42 )' USR1 |
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|
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echo before=$? |
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|
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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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|
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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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|
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#### traps are cleared in subshell (started with &) |
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|
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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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|
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# https://man7.org/linux/man-pages/man7/signal.7.html |
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|
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trap 'echo SIGURG' URG |
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|
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kill -URG $$ |
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|
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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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|
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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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|
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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 |