mirror of https://github.com/tLDP/LDP
33 lines
923 B
Bash
33 lines
923 B
Bash
#!/bin/bash
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# return-test.sh
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# The largest positive value a function can return is 255.
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return_test () # Returns whatever passed to it.
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{
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return $1
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}
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return_test 27 # o.k.
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echo $? # Returns 27.
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return_test 255 # Still o.k.
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echo $? # Returns 255.
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return_test 257 # Error!
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echo $? # Returns 1 (return code for miscellaneous error).
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# =========================================================
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return_test -151896 # Do large negative numbers work?
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echo $? # Will this return -151896?
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# No! It returns 168.
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# Version of Bash before 2.05b permitted
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#+ large negative integer return values.
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# It happened to be a useful feature.
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# Newer versions of Bash unfortunately plug this loophole.
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# This may break older scripts.
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# Caution!
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# =========================================================
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exit 0
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