I have a problem that I want to insert and delete some chars in the middle of a file. fopen() and fdopen() just allow to append at the end.
Is there any simple method or existing library that allow these actions? Thanks in advance.:confused: (7 Replies)
Hi,
How to strip a portion of a file name from behind...Say for Eg..i have a file name like aaaaa.bbbbb.Mar-17-2007
i want to remove .Mar-17-2007...is there a one line command which can give this output...
Thanks
Kumar (5 Replies)
Hi there, if i have some strings ie
test_324423
test_242332
test_767667
but I only want the number part (the bolded bit) how do I strip the leftmost 5 characters from the output so that i will have just
324423
242332
767667
any help would be greatly appreciated
Gary (5 Replies)
Hi ,
i have to strip the spaces in the string which has the following value
ABC DEF
i want this to appear like this
ABC DEF
is there any spilt method?
please help....
Thanks (3 Replies)
I want to create a temp file which is named based on a search string. The search string may contain spaces or characters that aren't supposed to be used in filenames so I want to strip those out.
My thought was to use 'tr' with but the result is the opposite of what I want:
$ echo "test... (5 Replies)
I tried to replace the following in vi:
old: 'e/thesis/pp/zones/zones'
new: 'd/so162/fix/pp'
For that, I used: :%s/e/thesis/pp/zones/zones/d/so162/fix/pp/g
but doesn't work, a trailing character error message appeared. How can I get it?
Thanks in advance (3 Replies)
I'm using a shell script to get user input with this command:
read UserInput
I would then like to take the "UserInput" variable and strip out all of the following characters, regardless of where they appear in the variable or how many occurrences there are:
\/":|<>+=;,?*@
I'm not sure... (5 Replies)
i want to parse a string and only display the digits in that string... How would i accomplish this with sed command.
For example.
input string: " 033434343 dafasdf"
output string: 03343434
Thanks (2 Replies)
Dear experts,
my problem is pretty tricky.
I want to change a file (see attached input.txt), according to another file (help.txt). The output that is desired is in output.txt. The example is attached.
Note that
-dashes should not be treated specially, they are considered normal characters,... (2 Replies)
I wrote myself a small little shell script to clean up a file I have issues with. In particular, I am stripping down a fully qualified host/domain name to just the hostname itself. The script works, but from a performance standpoint, it's not very fast and I will be working with large data sets.
... (4 Replies)
Discussion started by: dagamier
4 Replies
LEARN ABOUT REDHAT
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)