Subject: allocating controlling terminal on tty open?
To: None <current-users@NetBSD.ORG>
From: Todd Vierling <email@example.com>
Date: 11/05/1997 20:31:32
Now that we have pty's under SVR4, I can run dtterm and xterm from Solaris.
Nice, but the tcsh shell says it can't do TIOCGPGRP because its tty isn't
actually a controlling tty. <grumble> termios(7) reads:
A controlling terminal is never acquired by merely opening a terminal
Hm, has it always been this way? I can't recall. It seems that SVR4
assumes that you allocate a controlling terminal by doing setpgrp() (SVR4
doesn't take arguments; the emulation makes it equivalent to setpgid(0,0))
in the child process followed by an open of a tty. setsid() isn't called,
except by the parent process (which is already a process group leader, so it
Suggestions on how to get the child process to allocate a controlling tty?
Is there any way to make a tty become controlling terminal when opened (or
opened for the first time) by a process group leader created by setpgrp()?
I can't do it through emulation when TIOCGPGRP is called, because by that
time, the emulation is back to 'netbsd' (a native shell).
== Todd Vierling (Personal firstname.lastname@example.org; Business email@example.com)
== So you know what, Mikey? Go to bed.