43 lines
882 B
Plaintext
Executable File
43 lines
882 B
Plaintext
Executable File
unset a b
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#
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readonly a=A
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b=B
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readonly b
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# readonly on already readonly var is harmless:
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readonly b a
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readonly | grep '^readonly [ab]='
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# this should work:
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export a b
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export -n a b
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echo Ok:$?
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env | grep -e^a= -e^b= # shows nothing
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echo
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# these should all fail (despite the same value being assigned)
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# bash does not abort even in non-interactive more (in script)
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true; a=A
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echo Fail:$?
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true; readonly a=A
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echo Fail:$?
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echo
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# in bash, assignment in export fails, but export succeeds! :)
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# we don't mimic that!
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true; export a=Z
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echo Fail:$?
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#env | grep '^a='
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#echo "^^^a is exported"
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export -n a # undo that bashism, if it happens
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echo
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export b
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# this fails to both set and export a:
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a=Z env | grep '^[ab]='
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echo "^^^a is not exported"
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# but external command does get executed, and $? is not mangled (stays 42):
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(exit 42); a=Z env echo Visible:$?
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echo
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true; unset a
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echo Fail:$?
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