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From: erc@pai.UUCP (Eric Johnson)
Newsgroups: comp.sys.hp
Subject: tell() equivalent on Hp 800?
Keywords: lseek()
Message-ID: <1367@pai.UUCP>
Date: 26 Jul 90 13:27:16 GMT
Organization: Boulware Technologies, Inc., Burnsville, MN
Lines: 44

We've just got an HP 800 (834?) in house, and I've been porting our
industrial automation software to it. We're running HP-UX 7.0. The
only difference between the 800 series HP-UX 7.0 and the 300 series
is that tell() does not appear to be available on the 800. Is this 
correct? (We're much more familiar with the 300 line.)

tell() returns a long int that "tells" where you are in a file, sort
of like the analog to ftell() if you use open() instead of fopen().

Below is my hack for a tell() replacement. Do you see any problems
with this approach? I'm basically doing a seek zero bytes from the
current position (which I hope should still be the current position).


#ifndef SEEK_CUR
#define SEEK_CUR        1
#endif  /* -- SEEK_CUR */


long etell( fd )

int     fd;

{       /* -- function etell */

        return( lseek( fd, 0, SEEK_CUR ) );

}       /* -- function etell */


Are there any other "gotchas" on the 800 series that we should be
aware of?  So far, I haven't had any real problems migrating to
the 800, and I like HP-UX 7.0 much better than any previous HP
operating system--they seem to have come a long way in the last
few years.

Thanks,
-Eric

-- 
Eric F. Johnson               phone: +1 612 894 0313    BTI: Industrial
Boulware Technologies, Inc.   fax:   +1 612 894 0316    automation systems
415 W. Travelers Trail        email: erc@pai.mn.org     and services
Burnsville, MN 55337 USA