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bourne shell day of week

Posted on 2007-12-05
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Last Modified: 2013-12-26
We need to write a bourne shell script to call a different command on different days of the week and dates of the month. Example;

IF date of month = 14 THEN

ELSE IF day of week = 1 (Monday) THEN

ELSE IF day of week = 3 (Wednesday) THEN

etc.

How can I get the current date of month and day of week?
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Question by:bmiller250
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5 Comments
 
LVL 16

Expert Comment

by:DrNikon224
ID: 20415823
Is the use of cron out of the question? With cron you could keep a Monday.sh, Tuesday.sh, 14th.sh, etc and schedule them using crontab.
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LVL 16

Expert Comment

by:DrNikon224
ID: 20415882
You can still do the entire thing in a single script. To get dates, use `date +%?` - get the appropriate character for ? from the man page for strftime

Placeholders for values used in your example:
%w is weekday - 0-6 with Sunday as 0
%d is day of month with leading zero - 01-31


# date +%d
# 05

# date +%w
# 3
0
 

Author Comment

by:bmiller250
ID: 20415898
Cron will not work, because  the users will action the scripts and we don't want them to enter the parms
0
 
LVL 48

Accepted Solution

by:
Tintin earned 2000 total points
ID: 20416202

#!/bin/sh
dom=`date +%d`
day=`date +%A`
 
if [ $dom -eq 14 ]
then
   ..
elsif [ $day = Monday ]
then
   ..
elsif [ $day = Wednesday ]
then
   ..
fi

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0
 
LVL 48

Expert Comment

by:Tintin
ID: 20416221
or a variation on the above.

#!/bin/sh
dom=`date +%d`
day=`date +%a`
 
if [ $dom -eq 14 ]
then
   ..
   exit
fi
 
case $day in
Mon)    command ;;
Tue)    command ;;
Wed)    command ;;
Thu)    command ;;
Fri)    command ;;
Sat)    command ;;
Sun)    command ;;
esac

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