The string is fed into echo as is, leaving \n as two characters, \ and n. When you give echo -e you tell it to understand and translate that sort of escape sequence.
but if you tell echo this:
...echo doesn't have to translate. The argument is translated before the command is run, by the shell. The characters generated by the escape sequence get fed straight into it.
These 2 Users Gave Thanks to Corona688 For This Post:
Hi
I was wondering if it's possible to use a command to get the first 3 characters of a line in a text file, I tried grep but it returns the whole line but I am only interested in the first 3 characters. Is this possible with grep or I need any other command?
Also is it possible deleting from... (2 Replies)
I must remove hex characters 0A and 0D from several fields within an MS Access Table. Since I don't think it can be done in Access, I am trying here.
I am exporting a Table from Access (must be fixed length fields, I think, for my idea to work here) into a text format.
I then want to run a... (2 Replies)
Hi friends,
I want your help.
I have a flat file. I want a script to search following pattern in it and once it get that pattern it should grep next 7 characters from it and should keep it in output file output.TXT
Pattern is
RSTD3R0*******
In above example, characters in the place of *... (3 Replies)
Hi All,
My main intension of is to convert the Hexstring stored in a char* into hex and then prefixing it with "0x" and suffix it with ','
This has to be done for all the hexstring char* is NULL.
Store the result prefixed with "0x" and suffixed with ',' in another char* and pass it to... (1 Reply)
Hello All,
I have a requirement where I need to replaced the hex character - '\x0D' with 2 hex characters - 'x0D' & 'x0A'
I am trying to use SED -
But somehow its not working. Any pointers?
Also the hex character '\x0D' can occur anywhere in the line.
Can this also be accomplished... (6 Replies)
Hi,
I am a bit stuck with displaying characters. I am having values like below in the proper displayable characters. which I would want to print the actual value on the right hand side. I dont want to create an array because I would have to create 255 different values. isnt there another way of... (17 Replies)
I have the following file consisting of dates and sample measurements:
05��Oct��2010 1.31��
06��Oct��2010 1.32��
07��Oct��2010 1.31��
The hex characters are \xc2\xa0 in sequence.
I have tried to remove the characters as follows:
sed -i '' -e 's/\xc2\xa0//g' file.dat
and as follows... (6 Replies)
Hi guys,
First off, i'm a complete noob to UNIX and LINUX so apologies if I don't understand the basics!
I have a file which contains a hex value of '0D' at the end of each line when I look at it in a hex viewer.
I need to change it so it contains a hex value of '0D0A0A'
I thought... (10 Replies)
Discussion started by: AndyBSG
10 Replies
LEARN ABOUT MOJAVE
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)