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From: "jimmaureenrogers@worldnet.att.net" <jimmaureenrogers@worldnet.att.net>
Newsgroups: comp.lang.ada
Subject: Re: binding to C: popen
Date: 21 Feb 2006 07:25:33 -0800
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Poul-Erik Andreasen wrote:
> This ictually going as it is suppose to, but i would like set in an
> exception if the piping dosn't have succes. Acording to the C manual
> popen returns null if it fails. But how do i test on that in the FILEs type?

The popen man page describes the command as:
FILE *popen(const char *command, const char *mode);

Note that popen returns a file pointer. Upon failure it returns a null
pointer.

It seems that you might be able to test if the return value is null.

Jim Rogers