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# 1  
Old 09-12-2005
Scripting problems

Hello,

Im trying to write a script where it will only execute on a certain day. What would the script look like?

if [ today == monday ]

then do this

is this correct??
# 2  
Old 09-12-2005
And you don't want to use cron?
# 3  
Old 09-12-2005
yes cron will be set to run on say monday but if it isnt monday the script wont run
# 4  
Old 09-12-2005
I don't understand. If your crontab line looks like this:

# Minute Hour DayOfMonth MonthOfYear DayOfWeek(00=Sunday)
00 10 * * 01 yourscript

Then your script will allways only run on monday at 10am.

Last edited by tmarikle; 09-12-2005 at 01:59 PM..
# 5  
Old 09-12-2005
Quote:
Originally Posted by tmarikle
I don't understand. If your crontab line looks like this:

# Minute Hour DayOfMonth MonthOfYear DayOfWeek(00=Sunday)
00 10 * * 01 yourscript

Then your script will allways only run on monday at 10am.
yeah, but I think the OP also wants to enable 'non-monday' logic into the script as well so that 'nothing happens' if the script is ran on monday from the shell.
# 6  
Old 09-12-2005
if my crontab is set up to run only on the 13th.

0 9 13 * * /script

then my script will need to be setup as - if Monday is the 13 then run the script ifMonday is not the 13th not dont do anything, my question is what will my script look like?

if tuesday is 13 ?

then (run script) ?

else do nothing ?
# 7  
Old 09-12-2005
Quote:
Originally Posted by vgersh99
yeah, but I think the OP also wants to enable 'non-monday' logic into the script as well so that 'nothing happens' if the script is ran on monday from the shell.
This should do it:

Code:
if [ $(date +%A) == Monday ]
then
    echo "Can't run on Mondays"
    exit 2
fi

However, in light of this:
Quote:
if my crontab is set up to run only on the 13th.

0 9 13 * * /script

then my script will need to be setup as - if Monday is the 13 then run the script ifMonday is not the 13th not dont do anything, my question is what will my script look like?

if tuesday is 13 ?

then (run script) ?

else do nothing ?
I think that the OP has a misunderstanding of how cron works.

My example does not make any distinction on when a Monday falls in a month. My example says run every monday. The asterisk in the crontab's DayOfMonth field says run everyday and then the DayOfWeek is further interpreted to determine which day/days of the week should it run.

Vgresh99 makes a good point so if you want to limit the script from running interactively on Mondays, implement the first example.

I hope this helps

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