Subject: Linux pseudo tty
To: None <firstname.lastname@example.org>
From: Emmanuel Dreyfus <email@example.com>
Date: 02/13/2001 23:37:42
Here is the ktrace of Linux's xterm on PowerPC.
210 xterm CALL ioctl(0x4,_IOR('T',0x30,0x4),0x7fffd178)
210 xterm RET ioctl 0
210 xterm CALL stat(0x5040ce08,0x7fffcbc8)
210 xterm NAMI "/emul/linux/dev/pts/0"
210 xterm NAMI "/dev/pts/0"
210 xterm RET stat -1 errno 2 No such file or directory
_IOR('T',0x30,0x4) is LINUX_TIOCGPTN, it should return the pty number. I
implemented it like this
case LINUX_TIOCGPTN: /* get Pty number */
tty = curproc->p_pgrp->pg_session->s_ttyp;
idat = minor(tty->t_dev);
error = copyout (&idat, SCARG(uap,data), sizeof idat);
It seems Linux uses things we don't do (the /dev/pts stuff). I've got
very basic understanding of the tty stuff. Anyone can explain me what is
Hiroshima 45. Tchernobyl 86. Windows 95.