Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!nsc!taux01!rick
From: rick@taux01.UUCP (Rick Pelleg )
Newsgroups: comp.unix.questions
Subject: emulating BSD "ftruncate" on SYSV
Keywords: ftruncate
Message-ID: <1305@taux01.UUCP>
Date: 16 Mar 89 07:32:36 GMT
Reply-To: rick@taux01.UUCP (Rick Pelleg )
Organization: National Semiconductor (IC) Ltd, Israel
Lines: 28


Hello ye wizards.  Can anyone help me with the following problem?

Is it possible to emulate the BSDs system-call

     ftruncate(fd, length)
     int fd;
     off_t length;

on UNIX SYS-V, Using anything available (library + system calls)?

No, I DON'T have the name of the file... only a file pointer
which I can convert to a file-descriptor using 'fileno()'.

And please do not answer 'fp = fdopen(fileno(fp), "w")', as this will
return a NEW file pointer (i.e., a new _iob entry).  The old file
pointer info will remain and be flushed when files are closed (e.g.,
by exit()).

I am not a regular reader of this group, so please mail answers directly
to me.  I will summarize the interesting ones for the net.

Thanks in advance
-- 
--- Rick Pelleg
National Semiconductor (Israel)
6 Maskit st. P.O.B. 3007, Herzlia 46104, Israel  Tel. (972)52-522264
rick%taux01@nsc.com @{hplabs,pyramid,sun,decwrl}