Trigger the script if it is first sunday of the quarterly month Post: 302963453

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Top Forums Shell Programming and Scripting Trigger the script if it is first sunday of the quarterly month Post 302963453 by Aia on Wednesday 30th of December 2015 03:01:20 PM

12-30-2015

Registered User

Quote:

Originally Posted by bakunin

Yes, this would do it. But it might be a bit "tidier" (for lack of a better word) to have everything in one place (like the scripts text) than spread over several places (part of the logic in cron, part of the logic in the script. If you put [ $(/usr/bin/date +%e) -le 7 ] && into the scripts text or into the commandline of the cron command should (otherwise) make no big difference.

At least this is my personal POV on the matter and maybe only makes sense because of the acquired style i work in. Technically there is no real difference and with another way of doing things the opposite may make equal sense.

I hope this helps.

bakunin

Glad you mentioned that it was your opinion, since it is debatable. I could make the argument that since the time when it runs is related to the cron job, separating the actual work from it (the script) is more logical, in that way if I decided to run it the first Sunday and the third Sunday, I do not have to get involved with the script, but rather the facility that deals with the time. Also, if I am not who created the script and I am administering an issue in the box, related to this particular run job, I could right away see what and when it is trying to run, without having to delve into any script to find out. Now, this is my reasoning.

Last edited by Aia; 12-30-2015 at 04:14 PM.. Reason: Adding my reasoning

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LEARN ABOUT CENTOS

cal

CAL(1)								   User Commands							    CAL(1)

NAME

       cal - display a calendar

SYNOPSIS

       cal [options] [[[day] month] year]

DESCRIPTION

       cal displays a simple calendar.	If no arguments are specified, the current month is displayed.

OPTIONS

       -1, --one
	      Display single month output.  (This is the default.)

       -3, --three
	      Display prev/current/next month output.

       -s, --sunday
	      Display Sunday as the first day of the week.

       -m, --monday
	      Display Monday as the first day of the week.

       -j, --julian
	      Display Julian dates (days one-based, numbered from January 1).

       -y, --year
	      Display a calendar for the current year.

       -V, --version
	      Display version information and exit.

       -h, --help
	      Display help screen and exit.

PARAMETERS

       A single parameter specifies the year (1 - 9999) to be displayed; note the year must be fully specified: cal 89 will not display a calendar
       for 1989.

       Two parameters denote the month (1 - 12) and year.

       Three parameters denote the day (1-31), month and year, and the day will be highlighted if the calendar is displayed on a terminal.  If	no
       parameters are specified, the current month's calendar is displayed.

       A year starts on Jan 1. The first day of the week is determined by the locale.

       The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd of September. By this time, most countries had recognized the ref-
       ormation (although a few did not recognize it until the early 1900's). Ten days following that date were eliminated by the reformation,	so
       the calendar for that month is a bit unusual.

HISTORY

       A cal command appeared in Version 6 AT&T UNIX.

AVAILABILITY

       The cal command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							     June 2011								    CAL(1)