Semaphore - lockfile/flock Post: 302945532

7 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Retry every ten seconds while lockfile present

Hi, I have written below check lockfile script but need some tweaking on it. If there is a lockfile from present, I need the script to retry every 10 seconds to see if the lockfile is still there. After 120 seconds it should send an email. In my current version, if the script encounters...

2. Shell Programming and Scripting

"lockfile: command not found"

Just tried out the following code from "Using lockfiles in shell scripts": #!/bin/bash if ; then echo "File exists" else echo "File does not exists. Create file now." echo 1 > number.txt fi lockfile script.lock a=$(/usr/bin/tail -n 1 number.txt) if ; then...

3. UNIX for Advanced & Expert Users

Testing privileges -lock lockfile /var/lock/subsys/..- Permission denied

Hi all, I have to test some user priviliges. The goal is to be sure that an unauthorized user can't restart some modules (ssh, mysql etc...). I'm trying to automate it with a shell script but in same cases I got the syslog broadcast message. Is there any way to simply get a return code...

4. Shell Programming and Scripting

Bash Lockfile Command

Hi, I am new to this forum, could any one please help me to understand the LOCKFILE command with an example and what exactly it is used for and how it is used. Thanks Reshu289

5. Shell Programming and Scripting

Help using Flock (file lock)

Hello, I have been working on using "flock"/file lock to prevent two instances of a bash script from being executed. Below is a simplified version of what I have to illustrate the flock part. It works as it is set up there below however the piece I am trying to figure out is how to get it to...

6. Shell Programming and Scripting

Use of flock command for whole script

I'm changing my mindset from a few big processes moving data from a few sources under an external, dependency-based scheduler to multiple processes moving data from many sources run by each client cron and possibly interfering with each other. It has the benefits of more granular code but I'm...

7. Shell Programming and Scripting

Flock preventing function to work

Hi i have a script that check pings and i use flock to so the script wont run multipul times : its not the whole script but this is the idea : ( flock -x -w 3 200 || exit 1 /usr/sbin/fping -c$count -i$interval -a $hosts > $FILE1 2>&1 ) 200>/var/lock/.myscript.exclusivelock now i...

LEARN ABOUT DEBIAN

lfc-mkdir

LFC-MKDIR(1)							 LFC User Commands						      LFC-MKDIR(1)

NAME

       lfc-mkdir - make LFC directory in the name server

SYNOPSIS

       lfc-mkdir [-m mode] [-p] path...

DESCRIPTION

       lfc-mkdir creates the specified LFC directories in the name server.

       This  requires  write permission in the parent directory.  The owner ID and group ID of the new directories are set to the requestor's real
       user ID and group ID, respectively.

       path   specifies the LFC pathname.  If path does not start with /, it is prefixed by the content of the LFC_HOME environment variable.

       The lfc-mkdir command has the following options:

       -m     specifies the mode to be used.  Default mode is 777.

       -p     creates all the non-existing parent directories first.  The mode set for the created intermediate directories is the logical differ-
	      ence between 0777 and the user umask but at least 0300.

EXIT STATUS

       This program returns 0 if the operation was successful or >0 if the operation failed.

SEE ALSO

       Castor_limits(4), lfc_chmod(3), lfc_mkdir(3), lfc_umask(3)

AUTHOR

       LCG Grid Deployment Team

LFC
							   $Date: 2001/10/04 12:12:54 $ 					      LFC-MKDIR(1)