Sponsored Content
Top Forums UNIX for Dummies Questions & Answers redirection to tty** with cat Post 9771 by Perderabo on Friday 2nd of November 2001 10:23:58 AM
Old 11-02-2001
This is the way it's supposed to work. Since that other user owns /dev/ttyp3 he could "chmod 666 /dev/ttyp3" but this is very dangerous.

Some terminals have an escape sequence that will cause them to transmit the current line just as if it had been typed. On those terminals, you could send a command, then send cursor motion commands, and finally send that transmit escape sequence. This means that anyone on the system can execute any command as that user.
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

tty remote IP

I am fairly new to Unix Terminal outputs and I have a server that is sending print jobs to a PortServer 8 RJ45 situated in a remote location. It is working fine however we need to change the Subnet of that location and I am unable to find where the IP associated with the terminal is located. ... (4 Replies)
Discussion started by: martin_Montreal
4 Replies

2. AIX

tty

Hi All can anyone tell me what is the meaning of tty,or give me an example of this? (1 Reply)
Discussion started by: magasem
1 Replies

3. UNIX for Advanced & Expert Users

who truncates the output? redirection? tty? Bug?

Hi, Output of running berkeley ps is truncated to 80 chars when using redirections. $ /usr/ucb/ps -e 12490|cat #truncated to 80 chars PID TT S TIME COMMAND 12490 pts/24 S 0:00 sleep 4000 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa getting longer lines is done by changing the stty $... (7 Replies)
Discussion started by: fredy
7 Replies

4. UNIX for Dummies Questions & Answers

Difference between cat , cat > , cat >> and touch !!!

Hi Can anybody tell the difference between Difference between cat , cat > , cat >> and touch command in UNIX? Thanks (6 Replies)
Discussion started by: skyineyes
6 Replies

5. UNIX for Dummies Questions & Answers

Regarding redirection using cat.

The behavior of the following 2 operations is unexpected. K1 and K2 are files here :- 1) cat < K1 K2 The above operation should actually display contents of the both files. But it gives the contents of K2 only. How is that ? 2) cat > K1 K2 Above operation takes the contents of... (2 Replies)
Discussion started by: marconi
2 Replies

6. Shell Programming and Scripting

cat in the command line doesn't match cat in the script

Hello, So I sorted my file as I was supposed to: sort -n -r -k 2 -k 1 file1 | uniq > file2 and when I wrote > cat file2 in the command line, I got what I was expecting, but in the script itself ... sort -n -r -k 2 -k 1 averages | uniq > temp cat file2 It wrote a whole... (21 Replies)
Discussion started by: shira
21 Replies

7. UNIX for Advanced & Expert Users

tty changes?

I am not sure if I am using the correct terminology but somehow my tty keeps changing on me. The man pages are confusing to me on what exactly the tty is. This is what I see when I run the tty command. Could anyone explain why my tty keeps changing? ~ $ tty /dev/pts/1 ~ $ tty /dev/pts/0 (6 Replies)
Discussion started by: cokedude
6 Replies

8. Shell Programming and Scripting

Difficulty with CAT redirection in script

I have not been able to append the contents of many files into one file. I have executed the CAT command shown below separately substituting an actual path and file name for the array variable to verify that I have the syntax correct. The bottom line - nothing is happening with CAT. I am running... (16 Replies)
Discussion started by: demmith
16 Replies

9. Shell Programming and Scripting

Python: Redirecting to tty and reading from tty

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? I have a python script that has the following content: #!/usr/bin/python2.7 import getpass import sys import telnetlib import... (2 Replies)
Discussion started by: SkySmart
2 Replies
term::send(n)							 Terminal control						     term::send(n)

__________________________________________________________________________________________________________________________________________________

NAME
term::send - General output to terminals SYNOPSIS
package require Tcl 8.4 package require term::send ?0.1? ::term::send::wrch chan str ::term::send::wr str _________________________________________________________________ DESCRIPTION
This package provides the most primitive commands for sending characters to a terminal. They are in essence convenient wrappers around the builtin command puts. ::term::send::wrch chan str Send the text str to the channel specified by the handle chan. In contrast to the builtin command puts this command does not termi- nate the string with a line terminator. It also forces an flush of Tcl internal and OS buffers to ensure that the characters are processed immediately. ::term::send::wr str This convenience command is like ::term::send::wrch, except that the destination channel is fixed to stdout. BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category term of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. KEYWORDS
character output, control, terminal CATEGORY
Terminal control COPYRIGHT
Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net> term 0.1 term::send(n)
All times are GMT -4. The time now is 06:49 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy