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Full Discussion: need to read a file and keep waiting till it satisfies some condition
Top Forums Shell Programming and Scripting need to read a file and keep waiting till it satisfies some condition Post 302068873 by senthilk615 on Tuesday 21st of March 2006 11:25:36 AM
Old 03-21-2006
need to read a file and keep waiting till it satisfies some condition
In my script i am writing to a counter file the no of processes i had started,
that is each time i start a process, i will increment the content of counter file and also when the process ends i will decrement the content of the file.

after this i do some other activities, by now i want to decide to execute further or wait till the processes i started earlier got over.

So i keep reading the counter file for till content becoming zero.
I am confused of writing the above part in script please help me writing a loop to keep reading the file till the contents become zero.

regards,
Senthil
 

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LEARN ABOUT OSX

memory_pressure

MEMORY_PRESSURE(1)					    BSD General Commands Manual 					MEMORY_PRESSURE(1)

NAME

     memory_pressure -- Tool to apply real or simulate memory pressure on the system.

SYNOPSIS

     memory_pressure [-l level] | [-p percent_free] | [-S -l level]

OPTIONS

     -l <level> Apply real or simulate memory pressure (if specified alongside simulate argument) on the system till low memory notifications cor-
     responding to <level> are generated. Supported values are "warn" and "critical".

     -p <percent_free> Allocate memory till the available memory in the system is <percent_free> of total memory. If the percentage of available
     memory to total memory on the system drops, the tool will free memory till either the desired percentage is achieved or it runs out of memory
     to free.

     -S Simulate memory pressure on the system by placing it artificially for <sleep_seconds> duration at the "warn" or "critical" level.

     -s <sleep_seconds> Duration to wait before allocating or freeing memory if applying real pressure. In case of simulating memory pressure,
     this is the duration the system will be maintained at an artifical memory level.

DESCRIPTION

     A tool to apply real or simulate memory pressure on the system

SEE ALSO

     vm_stat(1)

Mac OS X							    Mar 7, 2013 							  Mac OS X
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