06-26-2014
Control characters in UNIX
Hi,
My files are showing some control characters in vi editor
^M
^@ and somtimes
^H
I removed ^M with %s/^M//g command
but how to represent ^@ and ^H
e.g. for ^M it is hold ctrl then v and m..
Please help..
I am very new to unix..
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
using c-shell, does anyone know how to send control characters to the printer before the job?
I need to set a printer to print in condensed mode
HELP (1 Reply)
Discussion started by: mglinsk
1 Replies
2. UNIX for Dummies Questions & Answers
how can i get rid of the control characters , ex. ^M, ^G, in a file?
thanks... (2 Replies)
Discussion started by: apalex
2 Replies
3. UNIX for Dummies Questions & Answers
Hi,
When I do a man and save it into a file, I end up getting a lot of control characters. How can I remove them??
I tried this:
/1,$ s/^H//g
But I get an error saying "no previous regular expression".
Can someone help me with this.
Thanks,
Aravind (5 Replies)
Discussion started by: aravind_mg
5 Replies
4. Shell Programming and Scripting
Hi,
Can anyone help me with controlling the cursor position from a shell script. Things like moving left,right,up,down etc
Anyone have any ideas? (2 Replies)
Discussion started by: ajcannon
2 Replies
5. Shell Programming and Scripting
Can anyone seem to know how to find out whether a UNIX text file has 'hidden' control characters?
Can I view them using 'vi' by some command line options?
If there are control characters in a text file which are invisible/hidden.. then how do I get rid of them?
Your intelletual answers are... (6 Replies)
Discussion started by: kewl_guy
6 Replies
6. Shell Programming and Scripting
Hi,
I have a .xml file in unix. We are passing this file through a xml parser.
But we are getting some control characters from input file and XML parser is failing for the control character in file.Now I am getting following error,
Error at byte 243206625 of file filename_$.xml:
Error... (1 Reply)
Discussion started by: fantushmayu
1 Replies
7. Shell Programming and Scripting
Can somebody please help me with the query. ?
I want a part of program of which should look for control characters in the flat file , when it finds it, displaying message that Control Characters found..!
Please help me (13 Replies)
Discussion started by: iamnoone
13 Replies
8. Shell Programming and Scripting
sed -e "s// /g" old.txt > new.txt
While I do know some control characters need to be escaped, can normal characters also be escaped and still work the same way? Basically I do not know all control characters that have a special meaning, for example, ?, ., % have a meaning and have to be escaped... (11 Replies)
Discussion started by: ijustneeda
11 Replies
9. Shell Programming and Scripting
Hi,
Please excuse for posting new thread on control characters,
I am facing some difficulties in removing the control character from a file extracted from top command,
i am able to see control characters using more command and in vi mode, through cat control characters are not visible ... (8 Replies)
Discussion started by: karthikram
8 Replies
10. Shell Programming and Scripting
Hallo Team,
I am trying to get rid of the dollar sign. I managed to remove all the other special characters but i am struggling with this one.
-bash-3.2$ cat -e missing_revenue_20141112.csv|less|head
BW0522168531211141180935668@196.23.110.141$
BW092218784121114-370120610@196.23.110.141$... (4 Replies)
Discussion started by: kekanap
4 Replies
LEARN ABOUT DEBIAN
receive
term::receive(3tcl) Terminal control term::receive(3tcl)
__________________________________________________________________________________________________________________________________________________
NAME
term::receive - General input from terminals
SYNOPSIS
package require Tcl 8.4
package require term::receive ?0.1?
::term::receive::getch ?chan?
::term::receive::listen cmd ?chan?
cmd process string
cmd eof
::term::receive::unlisten ?chan?
_________________________________________________________________
DESCRIPTION
This package provides the most primitive commands for receiving characters to a terminal. They are in essence convenient wrappers around
the builtin commands read and fileevent.
::term::receive::getch ?chan?
This command reads a single character from the channel with handle chan and returns it as the result of the command.
If not specified chan defaults to stdin.
It is the responsibility of the caller to make sure that the channel can provide single characters. On unix this can be done, for
example, by using the command of package term::ansi::ctrl::unix.
::term::receive::listen cmd ?chan?
This command sets up a filevent listener for the channel with handle chan and invokes the command prefix cmd whenever characters
have been received, or EOF was reached.
If not specified chan defaults to stdin.
The signature of the command prefix is
cmd process string
This method is invoked when characters were received, and string holds them for processing.
cmd eof
This method is invoked when EOF was reached on the channel we listen on. It will be the last call to be received by the
callback.
::term::receive::unlisten ?chan?
This command disables the filevent listener for the channel with handle chan.
If not specified chan defaults to stdin.
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 input, control, get character, listener, receiver, terminal
CATEGORY
Terminal control
COPYRIGHT
Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>
term 0.1 term::receive(3tcl)