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On Tuesday 25 July 2006 15:41, Alan McKinnon wrote: |
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> The answer is simple: |
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> |
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> 'test' is a bash builtin. When a bash script executes 'test', it is |
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> not /usr/bin/test that runs, but a function internal to bash. |
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> |
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> /usr/bin/test/ is provided for environments that want to run bash |
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> scripts that use test but bash is not the shell in use. |
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This makes sense. |
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> test and [ are not links to each other as they have different syntax |
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> (the closing ]), so they cannot be the same command. If they were |
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> linked, one of them would fail on execution with invalid syntax errors |
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This is not 100% true. As Neil Bothwick said, *the same program* can |
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behave differently based on the name it was invoked with, so [ could |
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very well have been implemented as a link to test (or viceversa), but |
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this is not the case, as you can see with a |
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ls -l /usr/bin/test /usr/bin/[ |
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-- |
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