sh foo vs. sh < foo

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sh foo vs. sh < foo

>I am trying to figure out what is the difference between executing a
>shellscript foo as
>
>sh foo
>
>compared to sh < foo.

Not much:

the former maintains the stdin of its invoking environment, the latter forces stdin to come from the script, thus making non-redirected "read"s inside the script to behave oddly (and also affecting any program invoked by "foo" which read stdin);
$0 in the former is set to "foo"; in the latter it is "sh".

Ken Pizzini

Creative Commons Attribution-ShareAlike License

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Single file version available here.
Last updated on 2008-06-17.
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