Re: popen2 example gives no output

[Stefan van der Walt]

On Fri, Sep 23, 2005 at 11:29:28PM -0400, John W. Eaton wrote:
> Here is the perl "script" that I ended up with in src/Makefile ($
> symbols are doubled because this comes out of a Makefile):
> 
>   $(PERL) -e 'foreach $$key (keys(%!)) {
>     $$x .= "#if defined ($$key)\n    { \"$$key\", $$key, },\n#endif\n";
>   }; while (<>) {
>     s/^ address@hidden@/$$x/;
>     print;
>   }'
> 
> What would the same be in Python?  Can it easily go in a Makefile as a
> one-liner?  If so, then we can use either Perl or Python, depending on
> which is available.

Maybe something like

${PYTHON} -c '
from errno import errorcode
from string import Template, join
from sys import stdin

t = Template("#if defned (\$e)\n{ \"$e\", $e, },\n#endif\n")
errstr = join([t.substitute(e=errorcode[i]) for i in errorcode.keys()])

for l in stdin:
    print l.replace("@SYSDEP_ERRNO_LIST@", errstr),
'

Regards
Stéfan