Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: grep usage - exit after first occurrence
Top Forums UNIX for Dummies Questions & Answers grep usage - exit after first occurrence Post 302148176 by sujit.das on Friday 30th of November 2007 05:30:29 AM
Old 11-30-2007
Quote:
Originally Posted by zazzybob
How about something like

Code:
while read line; do
  echo $line | grep "searchstring"
  if [ "$?" -eq "0" ]; then
     break
  fi
done < input_file

Cheers
ZB
grep -m 1 <expression> <file_name>


hope it will work.
cheers
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Grep for the same occurrence or maybe Sed

Hi, I have a file that looks like this dasdjasdjoasjdoasjdoa SYN dakspodkapsdka asdasdasdasdasdasdasd SYN sdfsdfsdfsdfdf shfishifhsdifhsidhfif fsdfsdfsdfsdfs sdfsdfsdfsdsdfsdfsdff cercercercerce sdasdajsdoajsodasodoo FIN dasdaskdpasdda... (4 Replies)
Discussion started by: hcclnoodles
4 Replies

2. Programming

Usage of exit() inside a signal handler

Is it ok to use exit() inside a signal handler? I catch SIGUSR1 in a signal handler and I try to close a file and then exit. The result is inconsistent. Sometimes the process exit and sometimes it returns to the original state before the signal handler was invoked. Perhaps exit is not legal in... (8 Replies)
Discussion started by: Tuvia
8 Replies

3. HP-UX

how can I find cpu usage memory usage swap usage and logical volume usage

how can I find cpu usage memory usage swap usage and I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times my final destination is monitor process logical volume usage above X % and number of Logical voluage above can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies

4. UNIX for Dummies Questions & Answers

Line number of an occurrence using grep

Hi All, is there a way to extract the line number of an occurrence using grep? I know that with the -n option it prints out the line number as well. I would like to assign the line number to a variable. Thanks, Sarah (5 Replies)
Discussion started by: f_o_555
5 Replies

5. Shell Programming and Scripting

Exit status of grep

I am trying to get the exit status of grep and test a condition with it, But it does not seem to be working as expected since i am doing something wrong apparently as per grep help Exit status is 0 if match, 1 if no match, and 2 if trouble. My problem is something like this templine - a... (7 Replies)
Discussion started by: prasbala
7 Replies

6. UNIX for Dummies Questions & Answers

grep first occurrence but continue to next entry in patternfile

I have 1300 files (SearchFiles0001.txt, SearchFiles0002.txt, etc.) , each with 650,000 lines, tab-delimited data. I have a pattern file, with about 1000 lines with a single word. Each single word is found in the 1300 files once. If I grep -f PatternFile.txt SearchFiles*.txt >OutputFile.txt... (2 Replies)
Discussion started by: newhavendweeb
2 Replies

7. Shell Programming and Scripting

grep and exit

I have a scenario, where i need to grep for the information and then exit. i have to grep for "import done" and "bye" from success.log and then update a file with success if these words are present and failure if they are not present. can any one help with this scenario? (4 Replies)
Discussion started by: chinuku
4 Replies

8. UNIX Desktop Questions & Answers

grep a specific amount of occurrence

hey , i m trying to figure out how to do the following : i got a text file the looks like so: 1031 1031 1031 1031 1031 1031 1031 1031 16500 16500 16500 16500 1031 1031 (4 Replies)
Discussion started by: boaz733
4 Replies

9. Shell Programming and Scripting

Substitute first occurrence of keyword if occurrence between two other keywords

Assume a string that contains one or multiple occurrences of three different keywords (abbreviated as "kw"). I would like to replace kw2 with some other string, say "qux". Specifically, I would like to replace that occurrence of kw2 that is the first one that is preceded by kw1 somewhere in the... (4 Replies)
Discussion started by: M Gruenstaeudl
4 Replies

10. Shell Programming and Scripting

Grep util last occurrence

I have file contents /tmp/x/abc.txt /home/bin/backup/sys/a.log I need this output: /tmp/x/ /home/bin/backup/sys/ Can somebody please help me out Please use CODE tags as required by forum rules! (3 Replies)
Discussion started by: jhonnyrip
3 Replies

LEARN ABOUT V7

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
All times are GMT -4. The time now is 08:50 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy