Re: [bug-gnulib] system module?

[Eric Blake]

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According to Andreas Büning on 6/22/2006 1:29 PM:
> 
> However, I thought that this behaviour of system() was common on DOS/Win*/OS/2
> systems.

> system("xcopy non_existing_file") returns 1 for example.

That's not a problem, unless:

FILE*f;
int result;
int ch;
f = popen("xcopy non_existing_file", "r");
while ((ch = getc(f)) != EOF);
result = pclose(f);

returns 256, and if WEXITSTATUS is defined as (status>>8)&0xff.  Can
someone with mingw access confirm if this system() bug is widespread?
I've already checked that cygwin is not affected.

> 
> Possibly, djgpp for DOS or the MinGW environment for Win* might have
> the same behaviour which I cannot test because I don't use them.

If they do, then I will try to write a module that does an AC_RUN_IFELSE
using something similar to the above; compare the results of popen and
system on the same command known to fail without producing output, and see
if the return values are the same.

- --
Life is short - so eat dessert first!

Eric Blake             address@hidden
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