Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to have my ksh script pause, until something appears in the logs.?
Top Forums Shell Programming and Scripting How to have my ksh script pause, until something appears in the logs.? Post 302793531 by hanson44 on Friday 12th of April 2013 01:26:23 PM
Old 04-12-2013
Quote:
1) Shutdown software ("cControl stop")
2) grep -n for DONE! (using awk?, record the "latest"
line number that DONE! was found on, or record "0" if not found.)
3) Startup software ("cControl start")
4) In a while loop, every 10 seconds, grep -n for DONE!
4b) Break while loop (somehow?) if grep -n finds a "LATER"
line number than what was recorded in step 2 above.
<-- Hm, not sure how to do this...but it sounds possible?
Yes, this is exactly what I'm suggesting. Here is working code, using sed as a better way to get the part of log file to test:
Code:
LAST_LINE_WITH_DONE=`grep -n DONE log | tail -n 1 | cut -d : -f 1`
if [ -z "$LAST_LINE_WITH_DONE" ]; then
  LINE_1_TO_TEST=`wc -l < log`
else
  LINE_1_TO_TEST=`expr $LAST_LINE_WITH_DONE + 1`
fi

while sleep 10; do
  sed -n "$LINE_1_TO_TEST,$ p" log > lines-to-test.txt
  grep -q DONE lines-to-test.txt
  if [ $? -eq 0 ]; then
    echo "Found DONE in newly created section of log"
    # Take additional actions
    # Perhaps break out of look
  fi
done

This User Gave Thanks to hanson44 For This Post:
chatguy
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

import var and function from ksh script to another ksh script

Ih all, i have multiples ksh scripts for crontab's unix jobs they all have same variables declarations and some similar functions i would have a only single script file to declare my variables, like: var1= "aaa" var2= "bbb" var3= "ccc" ... function ab { ...} function bc { ... }... (2 Replies)
Discussion started by: wolfhurt
2 Replies

2. Shell Programming and Scripting

Script Pause Until Rsync Is Done Transferring

Alright, I have this script that pulls files from a few locations, process those files, creates a zip file, rsync's it and then removes everything. The problem that I'm having is that I do not know how large the rsync'ed zip file is going to be. Right now I'm using a sleep command before I... (4 Replies)
Discussion started by: droppedonjapan
4 Replies

3. Shell Programming and Scripting

How to pause a shell script

Hi, I've written a shell script to take photos with my camera. After every picture taken, the picture is transmitted to the computer via usb and then deleted on the camera. But sometimes there's an error and the picture is not deleted and so, after a certain time, the camera chip will be... (4 Replies)
Discussion started by: McLennon
4 Replies

4. Shell Programming and Scripting

KSH script to run other ksh scripts and output it to a file and/or email

Hi I am new to this Scripting process and would like to know How can i write a ksh script that will call other ksh scripts and write the output to a file and/or email. For example ------- Script ABC ------- a.ksh b.ksh c.ksh I need to call all three scripts execute them and... (2 Replies)
Discussion started by: pacifican
2 Replies

5. Shell Programming and Scripting

Pause for remote computing in Telnet script

I am running a telnet script that connects to a database server and executes sql scripts. While the remote database is processing the commands within the sql scripts, my telnet script continues to send commands. Okay, that's fine. They get queued up in the remote server and executed sequentially.... (3 Replies)
Discussion started by: oldjuke
3 Replies

6. Shell Programming and Scripting

script for reading logs of a script running on other UNIX server

Hi, I have a script, running on some outside firwall server and it's log of success or failure is maintained in a file. I want to write a script which ftp that server and reads that file and checks the logs and if failure , I will send mail notification. Please let meknow if I am not... (1 Reply)
Discussion started by: vandana.parwani
1 Replies

7. Shell Programming and Scripting

Pause shell script till folder doesn't change size anymore

Hi, I recently would like to write a shell script that 1. Runs in the background (can be done with "&", but i'd be happy for other solutions to keep programs running) 2. Does its stuff 3 THEN checks a specified folder for a size change over time (say, each 5 seconds. AND ONLY continues with... (9 Replies)
Discussion started by: pasc
9 Replies

8. Shell Programming and Scripting

Creating a script requiring a pause for user input

Hi I'm trying to create a basic script that pauses for user input to verify a file name before generating the output. I have numerous SSL certificate files which I am trying to determine the expiry date so what I'm trying to do is write a script so that is pauses to request the name of the .pem... (9 Replies)
Discussion started by: Buddyluv
9 Replies

9. Shell Programming and Scripting

Pause before exit

6) printf "\n GoodBye! \n\n"; exit ;; I am trying modify the above command to pause a couple of seconds before exiting, so a message can be displayed. Thank you :). (8 Replies)
Discussion started by: cmccabe
8 Replies

10. Shell Programming and Scripting

If I ran perl script again,old logs should move with today date and new logs should generate.

Appreciate help for the below issue. Im using below code.....I dont want to attach the logs when I ran the perl twice...I just want to take backup with today date and generate new logs...What I need to do for the below scirpt.............. 1)if logs exist it should move the logs with extention... (1 Reply)
Discussion started by: Sanjeev G
1 Replies

LEARN ABOUT DEBIAN

save_binary_logs

SAVE_BINARY_LOGS(1p)					User Contributed Perl Documentation				      SAVE_BINARY_LOGS(1p)

NAME

       save_binary_logs - Concatenating binary or relay logs from the specified file/position to the end of the log. This command is automatically
       executed from MHA Manager on failover, and manual execution should not be needed normally.

SYNOPSIS

       # Test

       $ save_binary_logs --command=test  --binlog_dir=/var/lib/mysql --start_file=mysqld-bin.000002

       # Saving binary logs

       $ save_binary_logs --command=save --binlog_dir=/var/lib/mysql --start_file=mysqld-bin.000002 --start_pos=312
       --output_file=/var/tmp/aggregate.binlog

       # Saving relay logs

       $ save_binary_logs --command=save --start_file=mysqld-relay-bin.000002 --start_pos=312 --relay_log_info=/var/lib/mysql/relay-log.info
       --output_file=/var/tmp/aggregate.binlog

       save_binary_logs concatenates binary or relay logs from the specified log file/position to the end of the log. This tool is intended to be
       invoked from the master failover script(MHA Manager), and manual execution is normally not needed.

DESCRIPTION

       Suppose that master is crashed and the latest slave server has received binary logs up to mysqld-bin.000002:312. It is likely that master
       has more binary logs. If it is not sent to the slave, slaves will lose all binlogs from mysqld-bin.000002:312. The purpose of the
       save_binary_logs is to save binary logs that are not replicated to slaves. If master is reachable through SSH and binary logs are readable,
       saving binary logs is possible.

       Here is an example:

       $ save_binary_logs --command=save --start_file=mysqld-bin.000002 --start_pos=312 --output_file=/var/tmp/aggregate.binlog

       Then all binary logs starting from mysqld-bin.000002:312 are concatenated and stored into /var/tmp/aggregate.binlog. If you have binary
       logs up to mysqld-bin.000004, the following mysqlbinlog outputs are written.

       mysqld-bin.000002:Format Description Event(FDE), plus from 312 to the tail mysqld-bin.000003:from 0 to the tail, excluding FDE
       mysqld-bin.000004:from 0 to the tail, excluding FDE

perl v5.14.2							    2012-01-08						      SAVE_BINARY_LOGS(1p)
All times are GMT -4. The time now is 08:15 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy