This works but one can enter the ESC character (and most other characters) directly, at least in vi *) so you won't need a subshell: in insert mode press <CTRL>-<V> to enter the next character verbatim. If you press i.e. <CTRL>-<V> and then <ESC> the editor window will show usually this:
This is vis way of "printing" an unprintable character. Moving over with the cursor will confirm that it is NOT a caret character followed by a opening square bracket but a single character - the ESC. You can use it exactly as this. I usually put a comment on such lines to make sure i remember that:
Likewise you can i.e. enter literal <ENTER> characters the same way which will look like ^M and may more.
I hope this helps.
bakunin
__________
*) i have heard rumors about other editors being out there too. They haven't been confirmed yet.
I'm trying to modify the /usr/lib/lp/model/netstandard file to generate a header for all the print jobs that are sent, but there is no formfeed defined so the the job prints right after the header with no page break. What is the sequence I need in order to generate a formfeed? Or, do you have... (4 Replies)
Hi,
I am trying to execute the following command from a batch script, but no matter how many escape characters I put in it doesn't execute properly. It works fine from the command line with quotes around the -exec part.
#!/bin/sh
/usr/local/bin/sudo /usr/atria/bin/cleartool setview -exec... (0 Replies)
hey
i want to know the unix commands to replace all the character escape sequences with their "C" values in a string...
thanks in advance..!
Regards,
Sharanya (9 Replies)
Hi all
I have been trying to write a script to look for a set of specific escape characters in a file. On viewing the file via vi it shows this :
^ I understand this means no end of line.
I have tried a vary of grep parameters such as grep ^\^. filename grep --binary-file=binary without... (8 Replies)
Hi,
I want to know if escape charaters work on all the popular UNIX shells. More specifically I want to know if echo "\c" will work on most of the UNIX shells and are there any specific shells on which \c won't work.
Please help.
Thanks,
Vineet (2 Replies)
Hi All,
I have added the script command to user profile so that to record the on-screen data.But when i i checked the O/P i could see lot of escape sequence is there way to remove it. (2 Replies)
i need to replace the any special characters with escape characters like below.
test!=123-> test\!\=123
!@#$%^&*()-= to be replaced by
\!\@\#\$\%\^\&\*\(\)\-\= (8 Replies)
Need help in escaping special characters in sed command.
Here is the the string which i am trying to find a replace with
From :- REQUEST_TYPE=PIXEL&MSG_ID={//MESSAGE_ID}
To :- REQUEST_TYPE=PIXEL&MSG_ID= X_EDELIVERY_MESSAGE_ID & BATCH_ID= X_EDELIVERY_BATCH_ID
Here is the sed command i am... (2 Replies)
i am executing script from A server which will execute the script in B server , as below.
ssh A 'ssh B echo 'select * from testing where name ='test''
i am getting the below output.
select * from testing where name=test
but i need the output where clause with quotes , tried with... (3 Replies)
I have an application which I am integrating with that accepts the password via a CLI. I am running in to issues with passwords that contain special characters. I tried to escape them all, but I ran in to an issue where I cannot escape the characters
'
]
My attempt is as follows:
$... (2 Replies)
Discussion started by: AMG1978
2 Replies
LEARN ABOUT PLAN9
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)