thanks for your explications, i'm not an expert as you, i use always the same OS (OSX) and the same shell (bash 3.2), in my case i think that $var don't modify the contents of file
... ... ...
Thx
Hi protocomm,
Try the following script:
on OS X using bash when file contains:
I think you will find that it changes the contents from the three characters -, n, and <newline> to an empty file.
On some other operating systems, much more common file contents could be converted in ways (some obvious and some subtle) that would render working shell scripts or correct C source code contained in file into streams of syntax errors.
Hi there,
may someone easily help me on this :
I want to insert a text in a specific line number like :
linenumb2start=`cat memory_map.dld | nl -ba | egrep -i "label" | cut -f1`
line2insert=`expr $linenumb2start + 2`
and now I need to replace something like {} with {comment} at... (8 Replies)
Hi I'm new to sed, and need to add characters into a specific location of a file, the fileds are tab seperated.
text <tab> <tab> text <tab> text EOL
I need to add more characters to the line to look like this:
text <tab> <tab> newtext <tab> text <tab> text EOL
Any ideas? (2 Replies)
Hi,
I have to insert a line having variables using sed. But the variables are not getting substituted within sed.
Ex:
n=2
sed $n' i\
hi' file
This works. But the below code does not work.
n=2
line=hello
sed $n' i\
$line' file
The above code inserts '$line' in the 2nd line of the... (9 Replies)
Hi Guys,
can any one know how to replace the string by newline using sed ?
i dont need any other solution. I am very curious to know this in sed.
Input:
one,two,three
Output
one
two
three
we can acheive this by awk but in sed ?,
awk '{gsub(/\,/,"\n");print;}' File (6 Replies)
Just posted on another fellow's question using ed, but I wanted to know about doing it with sed on Unix. For example - I have a file of an unknown length, but I want to add a line after the shell declaration (Line 2). If possible, I'd like the example to be able to just substitute in a number and... (2 Replies)
Hello.
I have a config file (/etc/my_config_file) which may content :
#
# port for HTTP (descriptions, SOAP, media transfer) traffic
port=8200
# network interfaces to serve, comma delimited
network_interface=eth0
# set this to the directory you want scanned.
# * if have multiple... (6 Replies)
Hi,
I want to insert a value (x) in the 3rd position of each line in a file like below
a|b|c|d|1
a|b|c|d
a|b|c|d|e|1
a|b|cso that output file looks like
a|b|x|c|d|1
a|b|x|c|d
a|b|x|c|d|e|1
a|b|x|cI can do that using perl as below
#!/usr/bin/perl -w
use strict;
#inserting x at... (5 Replies)
Hello,
I have a file with multiple paragraphs/sections each starting with word "Handle" and if I grep for a pattern, I should get contents of entire section/para (not just line). Please advise, thanks!
#script.sh file.txt "System Information"
Handle 0x0001
DMI type 1, 27 bytes.
... (9 Replies)
Hi
I am trying to run a sed command within a script..unfortunately it wasn't written on Solaris so doesn't work. Can anyone help with the correct coding please?
It is:
sed -i '1i ROWID;ORDER_ID;JOB_NAME;ORDER_TABLE' ${OUTFILE} (4 Replies)
Discussion started by: Grueben
4 Replies
LEARN ABOUT ULTRIX
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)