Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to handle grepping variable data containing wildcards?
Top Forums Shell Programming and Scripting How to handle grepping variable data containing wildcards? Post 302983365 by RudiC on Monday 10th of October 2016 04:30:20 PM
Old 10-10-2016
The problem of your snippet in post#1 - beyond the missing do in the while loop - is that the awks in the two "command substitutions" read from stdin and thus drain the pattern file. As it has just two lines, when it comes to assigning fp its already at EOF, fp is empty, and thus grep looks for an empty match.

With sth. like
Code:
while IFS=, read -r fp X fn
  do    echo "Pattern: \"$fp\""
        egrep "$fp" source_file
  done <pattern_file
Pattern: "abcd efgh ijkl"
abcd efgh ijkl
abcd efgh ijkl
abcd efgh ijkl
Pattern: "mnop .* efgh ijkl"
abcd mnop unique-name01 efgh ijkl
abcd mnop unique-name02 efgh ijkl

you should come close to what you need.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Grepping using multiple wildcards

Is there anyway you can grep using multiple wildcards? When I run the below line the results return fine; grep 12345 /usr/local/production/soccermatchplus/distributor/clients/*/out/fixtures.xml | awk -F/ '{print $8}' However ideally, I need it to grep for; grep 12345... (3 Replies)
Discussion started by: JayC89
3 Replies

2. UNIX for Dummies Questions & Answers

grepping a variable

I need to pass a parameter that will then be grepped. I need it to grep /paramater and then have a space so if 123 was passed my grep would be grep '/123 ' sample.log this works fine from the command line but when i try and set it searchThis="/$2 " and then run grep $searchThis... (6 Replies)
Discussion started by: magnia
6 Replies

3. Shell Programming and Scripting

Grepping Date Variable

Hello, I would like for the user to input the date for a particular log file, then have the input sent to a variable, which is then used via grep to extra the logs for the specific date the user request. I did some searching, but I still don't understand why I'm not seeing any result. ... (4 Replies)
Discussion started by: ravzter
4 Replies

4. Shell Programming and Scripting

problem in using cgi_script to handle form data

Hi, I have an HTML form through which I get some text as input. i need to run a shell script say script.sh inside a perl-cgi script named main_cgi.sh on the form input. I want to write the contents of the form in a file and then perform some command line operations like grep, cat on the text... (0 Replies)
Discussion started by: piyush_priya
0 Replies

5. Shell Programming and Scripting

Help with grepping data from a text file

Hello, I have a text file which contains a list of strings which I want to grep from another file where these strings occur and print out only these lines. I had earlier used the grep command where File1 was the file containing the strings to be grepped (Source File) and File2 the Target File... (4 Replies)
Discussion started by: gimley
4 Replies

6. Shell Programming and Scripting

Grepping for variable in brackets

I have a script which reads a number out of a log file. The pertinent line is this: cat /tmp/listofnumbers When I run cat /tmp/listofnumbers what I am seeing is on each line. I am trying to make the script read from that file and grep for a variable like the following line should do: ... (4 Replies)
Discussion started by: newbie2010
4 Replies

7. Shell Programming and Scripting

Grepping data using awk

Hello, I have a data in file 1 2000000024776 2000000026979 2000000033355 2000000036309 2000000041291 2000000042679 2000000067221 and in file 2 its like this 2000000024776 16 2000000026979 16 2000000033355 16 (2 Replies)
Discussion started by: mirwasim
2 Replies

8. Shell Programming and Scripting

Grepping the data between 2 date ranges

Hi There, Good Day !! I have txt file containing data in the below format. There are many lines, here i have mentioned for example. cat remo.txt 2/3/2017 file1 3/4/2016 file2 6/6/2015 file5 1/1/2018 file3 4/3/2014 file4 - - - I need to grep the file names for given date rage... (11 Replies)
Discussion started by: kumar85shiv
11 Replies

9. UNIX for Beginners Questions & Answers

Expand Variables and Wildcards into another variable.

Dear Forum members, I am having trouble getting the complete filename (and directory path) in a variable. Output directory mentioned in the code have three files: DISPLAY_CITY_DETAILS_15-05-2019-08-29-26_MIGRATE_london.out DISPLAY_CITY_DETAILS_15-05-2019-08-29-26_MIGRATE_paris.out... (4 Replies)
Discussion started by: chetanojha
4 Replies

10. UNIX for Beginners Questions & Answers

Grepping for one variable while using awk to parse an associated variable

Im trying to search for a single variable in the first field and from that output use awk to extract out the lines that contain a value less than a value stored in another variable. Both the variables are associated with each other. Any guidance is appreciated. File that contains the... (6 Replies)
Discussion started by: ncwxpanther
6 Replies

LEARN ABOUT NETBSD

zegrep

ZGREP(1)						    BSD General Commands Manual 						  ZGREP(1)

NAME

     zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files

SYNOPSIS

     zgrep [grep-flags] [--] pattern [files ...]

     zegrep [grep-flags] [--] pattern [file ...]

     zfgrep [grep-flags] [--] pattern [file ...]

DESCRIPTION

     zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1).

     The grep-flags and pattern arguments are passed on to grep(1).  If an -e flag is found in the grep-flags, zgrep will not look for a pattern
     argument.

     zegrep calls egrep(1), while zfgrep calls fgrep(1).

EXIT STATUS

     In case of missing arguments or missing pattern, 1 will be returned, otherwise 0.

SEE ALSO

     egrep(1), fgrep(1), grep(1), gzip(1), zcat(1)

AUTHORS

     Thomas Klausner <wiz@NetBSD.org>

BSD
								 December 28, 2003							       BSD
All times are GMT -4. The time now is 03:49 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy