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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proto(4) Kernel Interfaces Manual proto(4)
NAME
proto - prototype job file for at
SYNOPSIS
DESCRIPTION
When a job is submitted to or the job is constructed as a POSIX shell script (see at(1)). The job file is created in as follows:
o creates a header describing the job as an job or a job. jobs submitted to all queues other than queue are listed as jobs. The header
is:
for an job, or
for a job.
o A set of POSIX shell commands is added to make the environment (see environ(5)) for the job the same as the current environment.
o then copies text from the prototype file to the job file, except for special variables that are replaced by other text:
Replaced by the current working directory.
Replaced by the current file size limit (see
ulimit(2)).
Replaced by the current umask (see
umask(2)).
Replaced by the time at which the job should be run,
expressed as seconds since January 1, 1970, 00:00 Coordinated Universal Time, preceded by a colon.
Replaced by text read by
from the standard input (that is, the commands provided to to be run in the job).
o When a job is submitted to queue queue, uses the file as the prototype file if it exists. Otherwise, it uses the file
EXAMPLES
The following file creates commands to change the current directory, file size limit, and umask in the job to their respective values as
they existed when was originally run. These commands are inserted before the commands in the job:
SEE ALSO
at(1), queuedefs(4).
STANDARDS CONFORMANCE
proto(4)