Re: gawk bug when calling system()

[Manuel Collado]

Eli Zaretskii escribió:
> > Date: Tue, 22 Jul 2008 09:36:08 -0400
> > From: Aharon Robbins <address@hidden>
> > Cc: address@hidden
> >
> > Hi. This is cc'ed to the bug list so that perhaps someone else can find
> > the problem. (And bcc'ed to the gawk Windows maintainer.)
> >
> > The issue is that under Windows, current gawk
> >
> >         gawk 'BEGIN { print system("exit 11") }'
> >
> > doesn't print the correct exit status.
>
> I think that's because awk.h has this snippet:
>
>     #ifndef WEXITSTATUS
>     #define WEXITSTATUS(stat_val) ((((unsigned) (stat_val)) >> 8) & 0xFF)
>     #endif
>
> It does the wrong thing for Windows, since the status there is not
> returned in the top 8 bits, but rather begins at the LSB.  I just
> tried
>
>    gawk "BEGIN { print system (\"exit 512\") }"
>
> on Windows, and sure thing, it printed 2.

Well, it depends on the particular Windows port of gawk:

- the DJGPP port (3.1.6) prints 0
- the MinGW port (3.1.6) prints 2
- the Cygwin port (3.1.5) prints 512

Al least for my installed versions.
--
Manuel Collado - http://lml.ls.fi.upm.es/~mcollado