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From: tml@tik.vtt.fi (Tor Lillqvist)
Newsgroups: comp.sys.hp
Subject: Re: Need help for TIOCNOTTY on HP9K400
Message-ID: <TML.91Feb6085940@nyyti.tik.vtt.fi>
Date: 6 Feb 91 13:59:40 GMT
References: <1991Feb5.201415.22555@polyof.poly.edu>
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In-reply-to: rocky@polyof.poly.edu's message of 5 Feb 91 20:14:15 GMT

In article <1991Feb5.201415.22555@polyof.poly.edu> rocky@polyof.poly.edu (A1 rocky shiotsuki (staff) ) writes:
      I need to compile a program on HP 9000 Series 400 which
   use TIOCNOTTY.
      In the file /usr/include/sys/ioctl.h, a TIOCNOTTY is defined
   as followed:

   #ifdef __hp9000s800
   /*
    * tty ioctl commands
     */

     #ifdef  notdef
     #define TIOCNOTTY       _IO('t', 113)           /* void tty association */
     #endif /* notdef */

   So, On Series 800, a TIOCNOTTY is defined, but not Series 400.

No it isn't defined on s800.  Note the #ifdef notdef.  Anyway, to get
the desired effect (detach from controlling terminal), use the
setsid() system call.  Then do signal(SIGHUP, SIG_IGN) and fork(), and
continue in the child, or else you might acquire a new controlling
terminal if and when you happen to open a terminal device file.
--
Tor Lillqvist,
working, but not speaking, for the Technical Research Centre of Finland