NetNews Usenet Archive 1992 #18/NN_1992_18.iso/spool/comp/sys/hp/9452

Text File | 1992-08-19 | 1.7 KB | 38 lines

Newsgroups: comp.sys.hp
Path: sparky!uunet!utcsri!torn!cunews!nrcnet0!bnrgate!bmers145!bnr.ca!tpc
From: [e-mail] (Thomas P. Chmara)
Subject: POSIX enhancements since HP-UX 6.5:  how affects daemonization?
Message-ID: <[e-mail]>
Keywords: fork() setsid()
Sender: [e-mail]
Reply-To: [e-mail]
Organization: Bell-Northern Research Ltd.
Date: Wed, 19 Aug 92 19:57:33 GMT
Lines: 25

Well, here we go, kicking and screaming into the '90s... :-)

The last time I touched applications in HP-UX 6.5  I had to write a daemon,
and used Dave Lennert's UnixWorld article (Dec88) to good advantage.  That
was pre-POSIX.  From what I can tell, for HP-UX 8.0, aside from setpgrp now
being setsid(), we *still* have to fork() twice (to ensure opening a tty
doesn't become a controlling tty).  One thing leaves me uneasy:  it used to
be that orphans (as we forcibly created in pre-POSIX) got PGRP==0; that's
not valid under POSIX, so they retain the old PGRP.  Does this also mean that
they can acquire a controlling tty, or does the old mechanism work (for
modified reasons)?

Any pointers on where I can find the rules and roadmarks for all of this would
be much appreciated by this crusty old kernel hack.  I've got a copy of
W. Richard Steven's Network Programming, but not UNIX Programming; that's
still coming...
    ---tpc---


--
I am sole owner of the above opinions. These opinions are furnished without
warranty or liability expressed or implied.  Your mileage may vary.
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