Sponsored Content
Full Discussion: Grep command in a loop
Top Forums UNIX for Beginners Questions & Answers Grep command in a loop Post 303017477 by Corona688 on Wednesday 16th of May 2018 01:37:53 PM
Old 05-16-2018
It'd be much better to watch the return code of the script if you can. Usually it will return 0 for success, anything else for error.

You can do
Code:
tail -f build.log | grep -l -q "Build Successful"

but if "Build Successful" never appears, it will wait forever.

The same problem faces any approach really. Without some way to tell when it's failed, it has no termination condition.
This User Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

grep in a loop

Hi , I am trying a script which takes user input userid . I am stuck how to check whether that is a valid user id or not in the audit log files. My code is : cd $CCP_AUDIT cat * > /export/home/$USR/l***/files echo "UserId:\c" read UserId #Date Function echo "DATE : \c" read xxx I... (7 Replies)
Discussion started by: gundu
7 Replies

2. UNIX for Dummies Questions & Answers

grep -v while loop

alist contain: a b c d e blist contain: a b c the code: #!/usr/bin/ksh cat blist | while read line do grep -V "$line" alist > data done (8 Replies)
Discussion started by: bobo
8 Replies

3. Shell Programming and Scripting

Grep commands in loop

Hi All, Reference to my previous post I need to compare all the lines in the file1 with file2 for this condition if file1 {$3,$5} ==file2 {$3,$5} then grep file2{$1}latest date. need output in file3 10/04/2008 09/04/2008 09/04/2008 08/04/2008 can anyone suggest me Thanks... (0 Replies)
Discussion started by: karthikn7974
0 Replies

4. Shell Programming and Scripting

grep and loop files

Hi , 1. I want to grep two or three lines from a set of files and put the grepped lines into again a set of files.like file1-greppedfile1 file2-greppedfile2 then again do some format to the grepped files with sed or awk then create another set of files. How can I do this in loop? 2.I... (4 Replies)
Discussion started by: kashik
4 Replies

5. Shell Programming and Scripting

Help with grep inside an if loop

Hello All, I have been reading posts on here for a while, but this is my first post. I have a document in which many sentences appear, and I am piping it through an exterior script which will tag each word in the document with its part of speech (not part of my script, just background). The... (3 Replies)
Discussion started by: daf189
3 Replies

6. Shell Programming and Scripting

Using grep within a while loop

Hi all, I have the below script to get input but i cannot get grep to work. input1.txt AAAAAAAAG input2.txt >gi|184009.1| LEAFY-like |AAAAAAAAGSGGGDHLPY However, when i use grep -f input1.txt input2.txt i cannot get any output matches (note that the match is underlined). Is it... (8 Replies)
Discussion started by: turkishvan
8 Replies

7. Shell Programming and Scripting

Help on grep in a do while loop

So this is what I'm trying to do: I have a file called registry.txt which has a list of registry entries I want to search for. I have another file called inctrl.txt on which I want to perform the search on. Here's the example contents of registry.txt SOFTWARE\Microsoft\Security... (3 Replies)
Discussion started by: r4v3n
3 Replies

8. Red Hat

using grep in a while loop

Hello everybody, I have been searching it, but it seems I am unable to find the correct information, that s why I am asking you guys, hoping somebody get an idea. Here is my problem : I want a script to loop until a string is identified in a log file. Here is the script : #!/bin/sh... (5 Replies)
Discussion started by: guyiom
5 Replies

9. Homework & Coursework Questions

GREP loop

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I need to search through the users home directories for keywords, display them. The code listed below will show... (7 Replies)
Discussion started by: jcllns1
7 Replies

10. Shell Programming and Scripting

Ps ax with grep in loop

Hello, I have built the following script to check if processes supplied by the argument are running or not. #!/bin/bash PROCLIST=$1 PROCESS="0" ERROR_PROCS="" IFS='+' read -ra ADDR <<< "$PROCLIST" for PROC in "${ADDR}"; do if ; then PROCESS=1 ... (9 Replies)
Discussion started by: nms
9 Replies
SVK::Log::Filter::Grep(3)				User Contributed Perl Documentation				 SVK::Log::Filter::Grep(3)

SYNOPSIS
SVK::Log::Filter::Grep - search log messages for a given pattern DESCRIPTION
The Grep filter requires a single Perl pattern (regular expression) as its argument. The pattern is then applied to the svn:log property of each revision it receives. If the pattern matches, the revision is allowed to continue down the pipeline. If the pattern fails to match, the pipeline immediately skips to the next revision. The pattern is applied with the /i modifier (case insensitivity). If you want case-sensitivity or other modifications to the behavior of your pattern, you must use the "(?imsx-imsx)" extended pattern (see "perldoc perlre" for details). For example, to search for log messages that match exactly the characters "foo" you might use svk log --filter "grep (?-i)foo" However, to search for "foo" without regards for case, one might try svk log --filter "grep foo" The result of any capturing parentheses inside the pattern are not available. If demand dictates, the Grep filter could be modified to place the captured value somewhere in the stash for other filters to access. If the pattern contains a pipe character ('|'), it must be escaped by preceding it with a '' character. Otherwise, the portion of the pattern after the pipe character is interpreted as the name of a log filter. STASH
/PROPERTY MODIFICATIONS Grep leaves all properties and the stash intact. perl v5.10.0 2008-08-04 SVK::Log::Filter::Grep(3)
All times are GMT -4. The time now is 06:36 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy