[Openmcl-devel] CCL startup script (ccl & ccl64) is not Bourne Shell compatible

Chun Tian binghe.lisp at gmail.com
Tue Oct 13 07:59:52 UTC 2009


Hi, Waldek Hebisch

Thank you very much for clarify this, I learnt this from you.

--binghe

> Chun Tian wrote:
>> Hi, Clozure team
>>
>> CCL's startup script (ccl & ccl64) cannot run correctly under Solaris
>> 10, because this two scripts is NOT Bourne Shell compatible and have
>> #!/bin/sh as their first line. The problem is in following lines:
>>
>> if [ -z "$CCL_DEFAULT_DIRECTORY"  -a  -n "`which readlink`" ]; then
>>     dir="`readlink $0`"
>>     probe "${dir%/scripts/ccl64}"
>> fi
>>
>> Here, the syntax "${dir%/scripts/ccl64}" is only support in GNU bash
>> (Bourne Again Shell) but original "sh". Today, almost every OS have  
>> "/
>> bin/sh" link to "/bin/bash" so that most users didn't notice this
>> issue. But Solaris 10 still use the original "/bin/sh" which lack of
>> support of that usage on shell variables.
>>
>
> The last paragraph is misleading: the "${dir%/scripts/ccl64}"  
> construct
> is in Posix shell specifiaction.  It works on most Unix systems
> simply because vensors ship standard compilant shells.   Solaris
> ships pre-standard Bourne shell, so it does not work.  Advice to
> require 'bash' goes in wrong direction -- several systems have
> different shell as '/bin/sh' and do not ship bash in default
> setup.  So using 'bash' is likely to break several other systems.
>
> AFAICS on Solaris correct fix is to replace '/bin/sh' by
> '/bin/posix/sh'.
>
> -- 
>                              Waldek Hebisch
> hebisch at math.uni.wroc.pl
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