Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: read from terminal/keyboard > /dev/tty
Top Forums UNIX for Dummies Questions & Answers read from terminal/keyboard > /dev/tty Post 302443194 by Gery on Saturday 7th of August 2010 12:21:39 PM
Old 08-07-2010
read from terminal/keyboard > /dev/tty
Hi,

I need to provide more than one character to "> /dev/tty" through terminal/keyboard input, I have this:

Code:
ok=false
while [ $ok = false ]
do
echo " Enter r1 to reformat "
> /dev/tty
read choice
case $choice in
         [r1])
         echo " bla bla bla "
         ;;
done

However, in this way, I just can provide one character, I can enter "r" or "1" alone. I need to enter "r1" instead. Is it possible to keep it simple using the " > /dev/tty " form?

Thanks in advance,
 

9 More Discussions You Might Find Interesting

1. Solaris

What is /dev/tty /dev/null and /dev/console

Hi, Anyone can help My solaris 8 system has the following /dev/null , /dev/tty and /dev/console All permission are lrwxrwxrwx Can this be change to a non-world write ?? any impact ?? (12 Replies)
Discussion started by: civic2005
12 Replies

2. Programming

sniff /dev/tty

hello all, Being root, I would like to log user activity (also multiple root activity), i don't really like history file based logging, lets assume that users have access to their .profile. I would like to write a monitoring daemon in C that would capture /dev/ttys, so I need to do a... (0 Replies)
Discussion started by: wayward
0 Replies

3. Linux

tty terminal permissions problem

I'm hoping someone can help me out here. I'm having a problem on my Red Hat Enterprise 5 Server where my tty devices "tty" are being set to read only permissions. I need them to be set to 777 in order to write to the serial printers through a custome application. I have gone through many... (2 Replies)
Discussion started by: Netwrkengeer
2 Replies

4. OS X (Apple)

No terminal (tty) after ssh and telnet also

Hi all, we are just confused about a strange problem on one server in production (XServer, running OSXS 10.5.6). It works normal for month. Since two day everthing seems to be fine also with one exception. When we connect trough ssh we won't get a tty session. For testing purposes, we enabled... (2 Replies)
Discussion started by: Frank.Knobloch
2 Replies

5. Programming

What happens on opening /dev/tty failure?

Since the existence of /dev/tty is not guaranteed, what happens when an attempt is made to open /dev/tty and there's no controlling terminal? Will it fail, or open /dev/null instead? Or do something else? So is checking for NULL in the code below a safe way of checking whether opening... (2 Replies)
Discussion started by: gencon
2 Replies

6. Programming

Create a pipe to /dev/tty

Hello everybody: I have a child process which reads a password from /dev/tty, as far as I know file descriptors for the child process can be seen by using lsof, so I want to connect to such device in order to send the password through a pipe, how could I do that? (2 Replies)
Discussion started by: edgarvm
2 Replies

7. UNIX for Dummies Questions & Answers

/dev/tty find last modified time

what can I use to find the last modified time of a /dev/tty ? (4 Replies)
Discussion started by: l flipboi l
4 Replies

8. UNIX for Dummies Questions & Answers

Reading password from /dev/tty

hi, From the below script: ##########################################pwd_auth.sh######################################################################################## #Author: Pandeeswaran Bhoopathy #Written on:26th Jan 2012 2:00PM #This script describes the feature of stty and illustrates... (3 Replies)
Discussion started by: pandeesh
3 Replies

9. Shell Programming and Scripting

Simply question about capturing output to /dev/tty

Suppose another person wrote the following one-line shell script: echo $RANDOM > /dev/tty QUESTION #1: How can the random number, which is output to the terminal by this script, be captured in a variable? QUESTION #2: How can this be done in a cron job? Specific code, whether in ksh or... (1 Reply)
Discussion started by: Paul R
1 Replies

LEARN ABOUT DEBIAN

tty

TTY(4)							     Linux Programmer's Manual							    TTY(4)

NAME

       tty - controlling terminal

DESCRIPTION

       The  file /dev/tty is a character file with major number 5 and minor number 0, usually of mode 0666 and owner.group root.tty.  It is a syn-
       onym for the controlling terminal of a process, if any.

       In addition to the ioctl(2) requests supported by the device that tty refers to, the ioctl(2) request TIOCNOTTY is supported.

   TIOCNOTTY
       Detach the calling process from its controlling terminal.

       If the process is the session leader, then SIGHUP and SIGCONT signals are sent to the foreground process group and  all	processes  in  the
       current session lose their controlling tty.

       This ioctl(2) call only works on file descriptors connected to /dev/tty.  It is used by daemon processes when they are invoked by a user at
       a terminal.  The process attempts to open /dev/tty.  If the open succeeds, it detaches itself from the terminal by using  TIOCNOTTY,  while
       if the open fails, it is obviously not attached to a terminal and does not need to detach itself.

FILES

       /dev/tty

SEE ALSO

       chown(1), mknod(1), ioctl(2), termios(3), console(4), tty_ioctl(4), ttyS(4), agetty(8), mingetty(8)

COLOPHON

       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2003-04-07								    TTY(4)
All times are GMT -4. The time now is 05:05 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy