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Top Forums UNIX for Beginners Questions & Answers Many processes running at the same time Post 303012879 by hicksd8 on Monday 12th of February 2018 05:10:54 AM
Old 02-12-2018
Create your own 'flag'. For example, when the job finishes, the last thing it does is create a file called 'oktorun'. The first thing the job does when it starts is check for the existence of the file 'oktorun' and, if it does not exist then do nothing and terminate. If the file does exist then delete it and run the job. So the file does not exist whilst a job is running.

Anyway, if you're happy for a job to start immediately after the previous one finishes then why not get it to spawn itself (without the use of cron) ?

Last edited by hicksd8; 02-12-2018 at 07:42 AM..
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disown(1)							   User Commands							 disown(1)

NAME
disown - ksh93 built-in function to disassociate a job with the current shell SYNOPSIS
disown [job ...] DESCRIPTION
The ksh93 disown command prevents the current shell from sending a HUP signal to each of the specified jobs when the current shell termi- nates a login session. If job is omitted, disown sends the HUP signal to the most recently started or stopped background job. OPERANDS
The following operands are supported: job Specifies the job or jobs on which disown operates. Specify job as one of the following: number Refers to a process ID. -number Refers to a process group ID. %number Refers to a job number. %string Refers to a job whose name begins with string. %?string Refers to a job whose name contains string. %+ or %% Refers to the current job. %- Refers to the previous job. EXIT STATUS
0 Successful completion. >0 One or more specified jobs does not exist. EXAMPLES
Example 1 Disowning a Job The following example disowns job 1: example% disown %1 AUTHORS
David Korn, dgk@research.att.com ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO
bg(1), jobs(1), ksh93(1), wait(1), attributes(5) SunOS 5.11 18 Apr 2007 disown(1)
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