Sponsored Content
Top Forums Shell Programming and Scripting awk variables in regex expression ? Post 302518335 by uran101 on Friday 29th of April 2011 10:16:46 AM
Old 04-29-2011
Quote:
Originally Posted by michaelrozar17
Code:
x=/jon/
echo jon | awk -v xa=$x '$1~/'"$xa"'/ {print}'

I have a question about something similar.

Code:
awk ' 
BEGIN { split(" ' " ` date ` " ' ", date) } 
$1 == date[2] && $2 == date[3] {print $0}
' $1

Why are there two pairs of quotes? I would say that there is one pair of double quotes too many, but when I remove them, it produces an error (different, depending on which pair I remove).

P.S. The script is meant to be a calendar reminder. There is an additional text file. It contains something like the following text:

Code:
Sep 30  mother's birthday
Oct  1  lunch with joe, noon
Oct  1  meeting 4pm

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Replace if regex on specific column matches expression?

I am attempting to convert rewrite rules to Nginx, and since due to the mass amount of rewrites we must convert, I've been trying to write a script to help me on a specific part, easily. So far I have this: rewrite ^action/static/(+)/$ staticPage.php?pg=$1&%$query_string; What I want done... (5 Replies)
Discussion started by: EXT3FSCK
5 Replies

2. Shell Programming and Scripting

Regular expression (regex) required

I want to block all special characters except alphanumerics.. and "."(dot ) character currently am using // I want to even block only single dot or multiple dots.. ex: . or .............. should be blocked. please provide me the reg ex. ---------- Post updated at 05:11 AM... (10 Replies)
Discussion started by: shams11
10 Replies

3. Shell Programming and Scripting

Creating a regex expression

Good morning all!! In my code I and looking through file /etc/syslog.congf and printing every line that has /var/log in it. I need to turn the if 9$line) into a regex code instead. #!/usr/bin/perl @file= 'cat /etc/syslog.conf'; //when foreach $line (@file){ if ($line =~... (3 Replies)
Discussion started by: bigben1220
3 Replies

4. Shell Programming and Scripting

help with simple regex expression

I am trying to grep the following line in a file using a bash shell: (..) admin1::14959:::::: (..) It works with the following expression (as expected) # cat file | grep ^*:: admin1::14959:::::: but it does not work with (not expected) # cat /etc/shadow | grep ^+:: I assume the... (2 Replies)
Discussion started by: schms
2 Replies

5. Shell Programming and Scripting

passing a regex as variable to awk and using that as regular expression for search

Hi All, I have a sftp session log where I am transferring multi files by issuing "mput abc*.dat". The contents of the logfile is below - ################################################# Connecting to 10.75.112.194... Changing to: /home/dasd9x/testing1 sftp> mput abc*.dat Uploading... (7 Replies)
Discussion started by: k_bijitesh
7 Replies

6. Emergency UNIX and Linux Support

Regular expression (regex) clean up text

Hi, Server - MEDIAWIKI - MYSQL - CENTOS 5 - PHP5 I have a database import of close to a million pages into my wiki, mediawiki site, the format that were left with is not pretty, and I need to find a way to clean this up and present it nicely... I think regex is the best option as I can... (1 Reply)
Discussion started by: lawstudent
1 Replies

7. Shell Programming and Scripting

Hi im new to bash scripting I want to know what does the regex expression do ??

# check host value regex='^(||1|2|25)(\.(||1|2|25)){3}$' if ')" != "" ]; then if ]; then echo host $host not found exit 4 fi elif ]; then echo $host is an invalid host address exit 5 fi (1 Reply)
Discussion started by: kevin298
1 Replies

8. Shell Programming and Scripting

awk regex expression works in AIX but not in Linux

I have following expression: echo "Sun 12 Jul BST 2014\nSun 12 Jul 2014\nSun 12 Jul IS 2014" | awk '/(Sun)+( 12)+( Jul )+({3} )?(2014)/{print;}' I ran above code in AIX box and output is as follows Sun 12 Jul BST 2014 Sun 12 Jul 2014 I ran above code in Linux box and output is as... (8 Replies)
Discussion started by: kamlesh_pradhan
8 Replies

9. UNIX for Beginners Questions & Answers

Regex Expression Replace

I have a XML file where there is a tag with like <wd:address_line_1>1234 Street</wd:address_line_1> I want to replace the values "1234 Street" with "Test Data". Different people have different address lines and i want to replace with a fixed value to mask the file. I was trying to use sed... (7 Replies)
Discussion started by: dr46014
7 Replies

10. UNIX for Beginners Questions & Answers

Sed: -e expression #1, char 20: unterminated address regex

I am trying to add word in last of particular line. the same command syntex is running on prompt. but in bash script give error."sed: -e expression #1, char 20: unterminated address regex" Please help. for i in `cat servername`; do ssh -q -t root@$i sed -i '/simple_allow_groups =/s/$/,... (4 Replies)
Discussion started by: yash_message
4 Replies
set_color(1)							       fish							      set_color(1)

NAME
set_color - set_color - set the terminal color set_color - set the terminal color Synopsis set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR] Description Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple, cyan, white and normal. o -b, --background Set the background color o -c, --print-colors Prints a list of all valid color names o -h, --help Display help message and exit o -o, --bold Set bold or extra bright mode o -u, --underline Set underlined mode o -v, --version Display version and exit Calling set_color normal will set the terminal color to whatever is the default color of the terminal. Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey font color, while set_color --bold white will result in a white font color. Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator. set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of ncurses and recompile fish against it in order to fix this issue. Version 1.23.1 Sun Jan 8 2012 set_color(1)
All times are GMT -4. The time now is 07:35 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy