ftruncate() on MVS datasets.

[John Fly]

I am trying to find a way to successfully call ftruncate() on an
existing MVS dataset.

I understand it takes a integer file descriptor, but fail to see how
to get one for an open MVS data set.


System is running Z/OS and we are not wanting to use HFS.

Any help would be greatly appreciated.

John

 

[Richard Bos]

I am trying to find a way to successfully call ftruncate() on an
existing MVS dataset.

That would be because ftruncate() is not an ISO C function but an
extension, and therefore doesn't belong on comp.lang.c.

I understand it takes a integer file descriptor,

Which do not exist in ISO C (they are a feature of, amongst other
things, Unix).

but fail to see how to get one for an open MVS data set.

Greatly system-dependently.

Richard

 

[Christopher Benson-Manica]

I am trying to find a way to successfully call ftruncate() on an
existing MVS dataset.

Your post is off-topic for comp.lang.c. Please visit

http://www.ungerhu.com/jxh/clc.welcome.txt
http://www.eskimo.com/~scs/C-faq/top.html
http://benpfaff.org/writings/clc/off-topic.html

for posting guidelines and frequently asked questions. Thank you.