1. re: [OT] POSIX stuff
How stupid of me! I scrolled straight past a unistd.h function called
pipe().
Nevermind, I think I can figure it out now... <slaps self in head>
=====================================================
I don't need my eyes checked, I need my brain checked:
Doc: "Yup, still there"
Me: "I want a second opinion"
.______<-------------------\__
/ _____<--------------------__|===
||_ <-------------------/
\__| Mr Trick
2. re: [OT] POSIX stuff
>From: mistertrik at hotmail.com
>How stupid of me! I scrolled straight past a unistd.h function called
>pipe().
>
>Nevermind, I think I can figure it out now... <slaps self in head>
It seems I spoke too soon...
Apologies for cluttering up a euphoria mailing list with C questions...
I have created the pipe, and forked to get the two separate processes.
How does one go about tying stdin to pipe read end in one process, and tying
stdout to pipe write end in the other?
Atm it just uses stdout = pipeend[1] and stdout = pipeend[0];, quite
definitely good programming practice.
On attempting to pipe ls to grep, a segmentation fault occured, but on
attempting to pipe ls to pico, there was no error, and it worked fine.
I am very confused...
=====================================================
.______<-------------------\__
/ _____<--------------------__|===
||_ <-------------------/
\__| Mr Trick
3. re: [OT] POSIX stuff
I'm not infront on a UNIX box right now but the freopen function might be
worth a look?
Regards,
Andy Cranston.
At 04:08 AM 4/28/03 +1000, you wrote:
>
>
>>From: mistertrik at hotmail.com
>>How stupid of me! I scrolled straight past a unistd.h function called
>>pipe().
>>
>>Nevermind, I think I can figure it out now... <slaps self in head>
>
>It seems I spoke too soon...
>Apologies for cluttering up a euphoria mailing list with C questions...
>
>I have created the pipe, and forked to get the two separate processes.
>How does one go about tying stdin to pipe read end in one process, and tying
>stdout to pipe write end in the other?
>Atm it just uses stdout = pipeend[1] and stdout = pipeend[0];, quite
>definitely good programming practice.
>
>On attempting to pipe ls to grep, a segmentation fault occured, but on
>attempting to pipe ls to pico, there was no error, and it worked fine.
>
>I am very confused...
>=====================================================
>.______<-------------------\__
>/ _____<--------------------__|===
>||_ <-------------------/
>\__| Mr Trick
>
>
>
>TOPICA - Start your own email discussion group. FREE!
>
>
4. re: [OT] POSIX stuff
Thanks andy.
I used freopen to implement redirection ( > >> < >& >>& ).
It won't work for piping, because freopen redirects a stream to a file.
freopen( char* file, char* filemode, stream )
In my implementation I created a pipe(). The two ends of the pipe are file
_handles_, not files. For that I thought you could use fdopen:
stream = fdopen( int filehandle, char* mode);
But it doesn't want to redirect stdout or stdin, the input process still
outputs to screen, rather than to the output process.
=====================================================
Mr Trick
>From: andy at systemzone.freeserve.co.uk
>Reply-To: EUforum at topica.com
>To: EUforum <EUforum at topica.com>
>Subject: re: [OT] POSIX stuff
>Date: Sun, 27 Apr 2003 22:10:01 +0100
>
>
>I'm not infront on a UNIX box right now but the freopen function might be
>worth a look?
>
>Regards,
>
>Andy Cranston.
>
>At 04:08 AM 4/28/03 +1000, you wrote:
> >
> >
> >>From: mistertrik at hotmail.com
> >>How stupid of me! I scrolled straight past a unistd.h function called
> >>pipe().
> >>
> >>Nevermind, I think I can figure it out now... <slaps self in head>
> >
> >It seems I spoke too soon...
> >Apologies for cluttering up a euphoria mailing list with C questions...
> >
> >I have created the pipe, and forked to get the two separate processes.
> >How does one go about tying stdin to pipe read end in one process, and
>tying
> >stdout to pipe write end in the other?
> >Atm it just uses stdout = pipeend[1] and stdout = pipeend[0];, quite
> >definitely good programming practice.
> >
> >On attempting to pipe ls to grep, a segmentation fault occured, but on
> >attempting to pipe ls to pico, there was no error, and it worked fine.
> >
> >I am very confused...
> >=====================================================
> >.______<-------------------\__
> >/ _____<--------------------__|===
> >||_ <-------------------/
> >\__| Mr Trick
> >
> >
> >TOPICA - Start your own email discussion group. FREE!
> >
> >
>
>
>TOPICA - Start your own email discussion group. FREE!
>
>
