popen () fails when running from the windows prompt

[Andy Koppe]

On 15 July 2011 19:41, Luiz Claudio Valdetaro wrote:
> i,
>
> I am planning a minimalistic installation of my application using cygwin.
> Everything works fine, except that popen() fails when running from the
> windows prompt.
>
> If I ran from the bash shell prompt of cygwin , it works fine. It is the
> only api I use that is failing. I created a simple, test program to narrow
> the issue,  and it also fails.
>
> my intention is an installation with just my app, plus the cygwin.dll, as
> little files as possible.
>
> This is my test program:
>
> main (argc,argv)
> int argc;
> unsigned char *argv[];
> {
> FILE *f;
> char command[80]="ls -l CGI-BIN";
> char response[200];
>    f = popen (command,"r");
>    if (f == NULL) {
>       puts ("stream error");
>       exit (0);
>    }
>     while (fgets(response,199,f) != NULL) {
>        puts (response);
>     }
>   fclose (f);
> }
>
> The program allays fails printing "stream error"

It's because popen() requires /bin/sh.

Andy

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