04-07-2017
Like Don Cragun said, I really don't see a point in your goal, and why you try to reinvent cron, but if you really want to do:
You are thinking of an infinite loop. Well, in your example code, you had two infinite loops serialized, which is not very sensible, because you would have to wait an infinite time until the second loop starts. Not good.
So, you would have one infinite loop. This means that this program should not run as a cron job at all. An infinite loop program runs, at least in theory, forever, and hence should not go into cron. With other words, you want to replace a cron solution by a service (daemon).
If you do not want to write a real daemon, you can of course start your program manually, but you have to do it every time after a reboot. The problem is that programs can crash, so you would need a - now again - cron job, which periodically looks after your "cron clone" and restarts it if necessary.
Do you really want to go for this?
If you want to combine your scripts, I would write one master script for each 1-minute-nagios, another master script where I invoke the 5-miniute-nagios, and so on. Then I have only few cron jobs, one for each time interval.
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LEARN ABOUT REDHAT
crontab
CRONTAB(1) General Commands Manual CRONTAB(1)
NAME
crontab - maintain crontab files for individual users (V3)
SYNOPSIS
crontab [ -u user ] file
crontab [ -u user ] { -l | -r | -e }
DESCRIPTION
Crontab is the program used to install, deinstall or list the tables used to drive the cron(8) daemon in Vixie Cron. Each user can have
their own crontab, and though these are files in /var, they are not intended to be edited directly.
If the allow file exists, then you must be listed therein in order to be allowed to use this command. If the allow file does not exist but
the deny file does exist, then you must not be listed in the deny file in order to use this command. If neither of these files exists,
then depending on site-dependent configuration parameters, only the super user will be allowed to use this command, or all users will be
able to use this command.
If the -u option is given, it specifies the name of the user whose crontab is to be tweaked. If this option is not given, crontab examines
"your" crontab, i.e., the crontab of the person executing the command. Note that su(8) can confuse crontab and that if you are running
inside of su(8) you should always use the -u option for safety's sake.
The first form of this command is used to install a new crontab from some named file or standard input if the pseudo-filename ``-'' is
given.
The -l option causes the current crontab to be displayed on standard output.
The -r option causes the current crontab to be removed.
The -e option is used to edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables. After you exit
from the editor, the modified crontab will be installed automatically.
SEE ALSO
crontab(5), cron(8)
FILES
/etc/cron.allow
/etc/cron.deny
STANDARDS
The crontab command conforms to IEEE Std1003.2-1992 (``POSIX''). This new command syntax differs from previous versions of Vixie Cron, as
well as from the classic SVR3 syntax.
DIAGNOSTICS
A fairly informative usage message appears if you run it with a bad command line.
AUTHOR
Paul Vixie <paul@vix.com>
4th Berkeley Distribution 29 December 1993 CRONTAB(1)