11-26-2008
tty is a command and also a device file. Check for it at /dev.
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Dear Export,
I want to begin an serial-communication application codes associated with TTY devices. But I don't know what key settings should be concerned after opening a TTY device file under UNIX plarform(SunOS 5.7)?
Could you give me some adivce? Thanks! (8 Replies)
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I use configure cisco devices daily using hyper terminal in windows via the serial port. Is there an alternative solution in unix that I can connect to a cisco console port via serial port? What application do I need?? (1 Reply)
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Hi people,
i tried to search in the forum... but didnt found the answer...
Sometimes i need to send a console message to all users in all tty, like reboot or shutdown does...
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Sometimes when I open up the terminal (like just now) it says
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Is there a utility built into Solaris that will allow me to see console messages from a tty?
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Hi ,
I have searched wiki for pseudo tty devices but it was very complex for me to understand.
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ttyX... (5 Replies)
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RK :) (4 Replies)
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10. Shell Programming and Scripting
In bash, you can do something like this:
#!/bin/bash
echo -n "What is your name? " > /dev/tty
read thename < /dev/tty
How can I do the same in python?
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#!/usr/bin/python2.7
import getpass
import sys
import telnetlib
import... (2 Replies)
Discussion started by: SkySmart
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SNP(4) BSD Kernel Interfaces Manual SNP(4)
NAME
snp -- tty snoop interface
SYNOPSIS
#include <sys/snoop.h>
int
ioctl(fd, SNPSTTY, &dev);
int
ioctl(fd, SNPGTTY, &dev);
int
ioctl(fd, FIONREAD, &result);
DESCRIPTION
/dev/snp is a snoop device which allows users to attach to any tty and watch activities on it. The kernel must be compiled with device snp,
or the snp module must be loaded, for these devices to be available.
To associate a given snp device with a tty to be observed, open the snp device and a tty device, and then issue the SNPSTTY ioctl on snp
device. The argument passed to the ioctl(2) is the address of a variable of type int, holding the file descriptor of a tty device. To
detach the snp device from a tty use a pointer to a value of -1.
The SNPGTTY ioctl returns information about the current tty attached to the open snp device.
The FIONREAD ioctl returns a positive value equal to the number of characters in a read buffer. Special values defined are:
SNP_OFLOW device overflow occurred, device detached.
SNP_TTYCLOSE tty not attached.
SNP_DETACH snp device has been detached by user or tty device has been closed and detached.
SEE ALSO
pty(4), sio(4), kldload(8), watch(8)
HISTORY
The snp device first appeared in FreeBSD 2.1. In FreeBSD 8.0 the snp driver was rewritten to work with the replaced TTY subsystem.
AUTHORS
The author of the current implementation is Ed Schouten <ed@FreeBSD.org>. Previous versions of snp were based on code written by
Ugen J.S. Antsilevich <ugen@NetVision.net.il>.
BUGS
This version of snp does not return proper error codes when calling FIONREAD. It also does not allow SNPSTTY to detach itself from the TTY.
BSD November 5, 2008 BSD