Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

problem with Regular expression as input in shell script

View Poll Results: Regular expression issue
Problem with regular expression as input 1 100.00%
Accepting special characters as input 0 0%
Voters: 1. This poll is closed

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting problem with Regular expression as input in shell script
# 8  
Old 12-22-2009
Quote:
-r
Do not treat a <backslash> character in any special way. Consider each <backslash> to be part of the input line.
read options

Quote:
Command Substitution
Command substitution allows the output of a command to replace the command name.
There are two forms:

$(command)
or
`command`


[..]
When the old-style backquote form of substitution is used, backslash retains its literal meaning except when followed by $, `, or \. The first backquote not preceded by a backslash terminates the command substitution. When using the $(command) form, all characters between the parentheses make up the command; none are treated specially.
Syntax Substitution
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

incorporating a regular expression statement in a shell script (.sh)

I do have a shell file where I call many unix commands . I would like to add a regular expression step in that shell file, where a text file, say Test.txt has to be openned and all the :'s should be replaced. Basically apply the follwoing regular expression: :%s/://g to that particular text... (2 Replies)
Discussion started by: Lucky Ali
2 Replies

2. Shell Programming and Scripting

regular expression with shell script to extract data out of a text file

hi i am trying to extract some specific data out of a text file using regular expressions with shell script that is using a multiline grep .. and the tool i am using is pcregrep so that i can get compatibility with perl's regular expressions for a sample data like this, i am trying to grab... (6 Replies)
Discussion started by: vemkiran
6 Replies

3. Programming

Perl: How to read from a file, do regular expression and then replace the found regular expression

Hi all, How am I read a file, find the match regular expression and overwrite to the same files. open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat"; open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat"; while (<DESTINATION_FILE>) { # print... (1 Reply)
Discussion started by: jessy83
1 Replies

4. Shell Programming and Scripting

Regular Expression problem

I have two input files (given below) and to compare each line of the File1 with each line of File2 starts with '>sample1'. If a match occurs and that matched line in the File2 contains another line or sequence of lines starting with "Chr" they have to be displayed in output file with that sample.... (8 Replies)
Discussion started by: hravisankar
8 Replies

5. Shell Programming and Scripting

Problem with regular expression

Witam, mam oto taki ciąg znaków: 8275610268 + 9012383215 =niepotrzebnytextPotrzebuję w bash'u wyciągnąć obie liczby (mają taką samą liczbę cyfr), zapisać je do osobnych zmiennych, ale coś nie idzie, kombinowałem z grepem, ale nie potrafię skleić tego wyrażenia regularnego, no i potem przypisać do... (7 Replies)
Discussion started by: menda90
7 Replies

6. Shell Programming and Scripting

Problem with a regular expression

Hello! I'm working with AWK, and i have this code: /<LOOP_TIME>/,/<\/LOOP_TIME>/ I want that match every everything between <LOOP_TIME> and </LOOP_TIME>, but not if the line have a "#" before the tags. Someone can help me? Thanks! (6 Replies)
Discussion started by: claw82
6 Replies

7. UNIX for Dummies Questions & Answers

Regular Expression Problem

this is how my xyz.log file loooks like :- info ( 816): CORE1116: Sun ONE Web Server 6.1SP5 B08/17/2005 22:09 info ( 817): CORE5076: Using from info ( 817): WEB0100: Loading web module in virtual server at info ( 817): WEB0100: Loading web module in virtual server at perl... (12 Replies)
Discussion started by: chris1234
12 Replies

8. Shell Programming and Scripting

using regular expression an shell script!!

I want to check if the first argument of my shell script starts with a specifiec string? Any Idea?? Thank u (3 Replies)
Discussion started by: andy2000
3 Replies

9. Shell Programming and Scripting

Regular Expression problem

Hi guys I've been trying to write a regular expression. If I'm tryin to validate a sequence of characters as follows... AB1-232-623482-743 43/3 where a) any character after the "AB" can be any alphanumeric character b) the " 43/3" part is optional is there a quick neat way for me... (5 Replies)
Discussion started by: djkane
5 Replies

10. UNIX for Dummies Questions & Answers

Regular Expression Problem

Display all of the lines in a file that contain "Raspberry" followed later in the line by the letter "a" I tried: grep Raspberry*a filename that didn't work Anyone know a solution? (1 Reply)
Discussion started by: netmaster
1 Replies
Login or Register to Ask a Question