06-25-2009
Automatically Rerun a script based on previous execution output
Hi Experts,
I have a shell script called "updatevs" that is scheduled to run at 6.00 am everyday via cronjob. The cronjob will execute this script and output to a log file. The functionality of this script is to read the database and run a set of commands. This script is generally successful but some times due to network outage or Database being down it fails.
Only in case of a failure i would like to rerun the script every 20 mins for the next 2 hours, if still not successful after 2 hours i would like an email to be triggered to address "xxxxx@abc.com"
There may be several ways to solve this case however I was thinking of writing a small script called "checklog" which reads the log file and searching for the obevious words like "ERROR", when found "Checklog" script will rerun "updatevs" script. I don't think this is the solution as i can't see a way of making this recurring.
Please let me know your valuable feeback on how to acheive this.
Many Thanks
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LEARN ABOUT PHP
set_time_limit
SET_TIME_LIMIT(3) 1 SET_TIME_LIMIT(3)
set_time_limit - Limits the maximum execution time
SYNOPSIS
bool set_time_limit (int $seconds)
DESCRIPTION
Set the number of seconds a script is allowed to run. If this is reached, the script returns a fatal error. The default limit is 30 sec-
onds or, if it exists, the max_execution_time value defined in the php.ini.
When called, set_time_limit(3) restarts the timeout counter from zero. In other words, if the timeout is the default 30 seconds, and 25
seconds into script execution a call such as set_time_limit(20) is made, the script will run for a total of 45 seconds before timing out.
PARAMETERS
o $seconds
- The maximum execution time, in seconds. If set to zero, no time limit is imposed.
RETURN VALUES
Returns TRUE on success, or FALSE on failure.
NOTES
Warning
This function has no effect when PHP is running in safe mode. There is no workaround other than turning off safe mode or changing
the time limit in the php.ini.
Note
The set_time_limit(3) function and the configuration directive max_execution_time only affect the execution time of the script
itself. Any time spent on activity that happens outside the execution of the script such as system calls using system(3), stream
operations, database queries, etc. is not included when determining the maximum time that the script has been running. This is not
true on Windows where the measured time is real.
SEE ALSO
max_execution_time, max_input_time.
PHP Documentation Group SET_TIME_LIMIT(3)