Re: [bug-gawk] POSIX mode "system" returing invalid exit status

[Steven Penny]

On Fri, Mar 23, 2018 at 2:07 AM, arnold wrote:
> When gawk behaves differently with and without --posix, there is a reason.

Thanks for the reply. I checked here [1] and dont see any mention of "16-bit
value". No mention here [2] either. I do notice some strange results depending
on the compiler:

    $ cat z.c
    #include <stdio.h>
    #include <stdlib.h>
    int main() {
      printf("%d\n", system("grep"));
    }

    $ x86_64-pc-cygwin-gcc -o cygwin z.c
    $ x86_64-w64-mingw32-gcc -o mingw32 z.c

    $ ./cygwin
    Usage: grep [OPTION]... PATTERN [FILE]...
    Try 'grep --help' for more information.
    512

    $ ./mingw32
    Usage: grep [OPTION]... PATTERN [FILE]...
    Try 'grep --help' for more information.
    2

[1] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/awk.html
[2] http://pubs.opengroup.org/onlinepubs/9699919799/functions/system.html