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Top Forums Shell Programming and Scripting How to make a script to run everytime a new file is copied into a directory?? Post 302307429 by ks_reddy on Wednesday 15th of April 2009 10:24:04 AM
Old 04-15-2009
How to make a script to run everytime a new file is copied into a directory??

Hi folks

I have a unix script script1 in a directory folder1 and also I have few input log files in this directory. My input log files will be copied into this directory folder1 from the portable thumb drive.

Now what I want is I need to run this script1 whenever any new file is copied into this directory and also in a generic way whenever the contents(files) in this folder1 directory changes.

It may look like I can do this with some cron job set to some time intervals everyday, but it will be simply wasting the CPU resources as most of the times I will be running complex scripts other than this script.
The unix environment I am using is cygwin installed in Windows XP.

Thanks in advance..........
 

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cron(8) 						      System Manager's Manual							   cron(8)

NAME
cron - The system clock daemon SYNOPSIS
/usr/sbin/cron DESCRIPTION
The cron daemon runs shell commands at specified dates and times. Commands that are to run according to a regular or periodic schedule are found within the crontab files. Commands that are to run once only are found within the at files. You submit crontab and at file entries by using the crontab and at commands. Because the cron process exits only when killed or when the system stops, only one cron daemon should exist on the system at any given time. Normally, you start the cron daemon from within a run command file. During process initialization and when cron detects a change, it examines the crontab and at files. This strategy reduces the overhead of checking for new or changed files at regularly scheduled intervals. The cron command creates a log of its activities. The cron daemon must be started from the system startup scripts because it must begin execution without a login user ID set. The cron daemon starts each job with the following process attributes stored with the job by the invoking process: Login user ID Effective and real user IDs Effective and real group IDs Supplementary groups It also establishes the following attributes from the authentication profile of the account associated with the login user ID of the invok- ing process: Audit control and disposition masks Kernel authorizations DIAGNOSTICS
The at and batch programs will refuse to accept jobs submitted from processes whose login user ID is different from the real user ID. FILES
Specifies the command path. Main cron directory Directory containing the crontab files. List of allowed users. List of denied users His- tory information for cron Queue description file for at, batch, and cron RELATED INFORMATION
Commands: at(1), crontab(1), rc0(8), rc2(8), rc3(8) Files: queuedefs(4) delim off cron(8)
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