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#!/bin/bash |
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|
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#### trap -l |
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trap -l | grep INT >/dev/null |
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## status: 0 |
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## N-I dash/mksh status: 1 |
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|
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#### trap -p |
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trap 'echo exit' EXIT |
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trap -p | grep EXIT >/dev/null |
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## status: 0 |
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## N-I dash/mksh status: 1 |
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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=$? |
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## stdout: status=1 |
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## BUG mksh status: 1 |
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## BUG mksh stdout: status=0 |
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## BUG dash/bash status: 0 |
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## BUG dash/bash stdout: status=0 |
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|
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#### trap EXIT |
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cleanup() { |
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echo "cleanup [$@]" |
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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 DEBUG |
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debuglog() { |
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echo "debuglog [$@]" |
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} |
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trap 'debuglog x y' DEBUG |
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echo 1 |
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echo 2 |
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## STDOUT: |
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debuglog [x y] |
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1 |
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debuglog [x y] |
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2 |
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## END |
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## N-I dash/mksh STDOUT: |
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1 |
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2 |
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## END |
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|
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#### trap RETURN |
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profile() { |
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echo "profile [$@]" |
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} |
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g() { |
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echo -- |
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echo g |
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echo -- |
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return |
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} |
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f() { |
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echo -- |
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echo f |
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echo -- |
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g |
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} |
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# RETURN trap doesn't fire when a function returns, only when a script returns? |
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# That's not what the manual syas. |
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trap 'profile x y' RETURN |
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f |
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. spec/testdata/return-helper.sh |
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## status: 42 |
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## STDOUT: |
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-- |
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f |
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-- |
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-- |
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g |
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-- |
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return-helper.sh |
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profile [x y] |
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## END |
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## N-I dash/mksh STDOUT: |
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-- |
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f |
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-- |
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-- |
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g |
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-- |
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return-helper.sh |
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## END |
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|
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#### trap ERR and disable it |
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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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echo 1 |
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false |
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echo 2 |
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trap - ERR # disable trap |
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false |
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echo 3 |
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## STDOUT: |
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1 |
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err [x y] 1 |
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2 |
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3 |
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## END |
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## N-I dash STDOUT: |
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1 |
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2 |
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3 |
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## END |
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|
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#### trap with PARSE error (implicit exit) |
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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 with PARSE error with 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 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 |