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From: chan@hpfcmgw.HP.COM (Chan Benson)
Newsgroups: comp.sys.hp
Subject: Re: usleep [Re: BSD and HPUX, The Questions Continue...]
Message-ID: <17780026@hpfcmgw.HP.COM>
Date: 21 May 91 16:01:10 GMT
References: <1991May2.202710.5152@odin.diku.dk>
Organization: HP Fort Collins, CO
Lines: 42

>>>Anyway, use of BSD functions doesn't imply "sloppy programming style",
>>>just "BSD programming style".  We're trying to minimize the pain required
>>>for importing BSD and Sun applications.  The only things we want to force
>>>-lBSD for is when conflicting functions are used, such as setpgrp() and
>>>signal().
>>
>>I don't understand.  I just wasted many tens of hours trying to port a
>>large package (the PP X.400 system) to HP/UX, which broke signal()
>>because I was trying to use -lBSD in order to get the b*() functions.
>>I finally had to take out -lBSD and use macros for the b* stuff.
>>Admittedly the package was not totally BSD-ish, in that it had a compile
>>option for SYS5, which only addressed part of the BSD-SYS5 issues.
>>
>>Why would you want to force -lBSD when it breaks SYS5 code?
>
>You wouldn't. If HP had had any brains, they would have kept the utility
>funtions (bzero, etc) separate from functions which break existing code.

Yes, that's what the original poster said: With the new setup, you only
link in libBSD to get Berkeley things that conflict with System V. All
the other stuff (like the b* routines) are available without -lBSD.

> They also haven't bothered to include usleep(), so BSD programs which want that
> routine can't be compiled without a bit of work either.

Sure they can, they just can't be linked. (Sorry, I'm just trying to
live up to my snide reputation.) Here's a version of usleep I use: 

#include <time.h>

usleep (usecs)
long  usecs;
{
    struct timeval timeout;

    timeout.tv_sec = 0;  /* should be usecs / 1000000 */
    timeout.tv_usec = usecs;  /* should be usecs % 1000000 */
    select(0, 0, 0, 0, &timeout);
}

			-- Chan Benson
			HP Fort Collins