Portability of shell scripts from other *nixes

[Devin Teske]

On Jan 25, 2012, at 8:13 PM, Chuck Swiger wrote:

> Hi--
> 
> On Jan 25, 2012, at 7:24 PM, Da Rock wrote:
>> On 01/26/12 12:55, Doug Poland wrote:
>>> This gets me closer, but the scripts behave differently now on OS X.  For example, printf's don't output the same.
>> 
>> Try searching on google and find out exactly what sh MacOSX is using. Then you'd have a better idea on what you're working with.
> 
> /bin/sh on MacOSX is:
> 
> $ /bin/sh --version
> GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin10.0)
> Copyright (C) 2007 Free Software Foundation, Inc.
> 
> ...and it has been using bash as /bin/sh since 10.2 or so.
> 
> Anyway, running bash as /bin/sh versus as /bin/bash likely affects whether it invokes printf as a builtin(1) command or as an external command.  It's possible that invoking /usr/bin/printf instead of just printf in the scripts might resolve the issue(s).
> 

If that's the problem, perhaps a "trick" can do:

	printf(){builtin printf "$@";}

At the top after the she-bang. Should cause all invocations to use built-in versus otherwise by defining a function that explicitly calls the built-in.
-- 
Devin

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