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display number of days in current month

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# 1  
Old 03-15-2011
display number of days in current month
hi all

searched google and here, cant find and am begining to suspect there is no options for this.

shell = born

with either the date or cal command I need to display the number of days in current month. can anyone point me in the right direction?
# 2  
Old 03-15-2011
Code:
cal | nawk 'FNR>2{d+=NF}END{print d}'

# 3  
Old 03-15-2011
thanks..

I get nawk not found
# 4  
Old 03-15-2011
Quote:
Originally Posted by rontopia
thanks..

I get nawk not found
so use 'awk' instead.....
# 5  
Old 03-15-2011
sorry I got it now.. thanks a bunch for the help
# 6  
Old 03-15-2011
How about:
Code:
days=$(($(cal | wc -w) - 9))

Takes away 9 because of 7xDoW_heading + 1xmonth + 1xyear

or pull last word on the last line with sed:
Code:
days=$(cal | sed -n '/[23]/h;${x;s/.* //p;}')

Last edited by Chubler_XL; 03-15-2011 at 08:31 PM..
# 7  
Old 03-15-2011
Code:
# cal | sed 'N;N;N;N;N;N;N;s/\n//g;s/.*\(..\)$/\1/'
31

Code:
# cal | awk 'NF{x=$NF}END{print x}'
31

---------- Post updated at 12:34 AM ---------- Previous update was at 12:33 AM ----------

Code:
# cal | xargs -n1 | tail -1
31

@Schubler: in some case, yours sed solution doesn't work as expected :

Code:
# cal 7 2011 | sed 'N;N;N;N;N;N;N;s/\n//g;s/.*\(..\)$/\1/'
31
# cal 7 2011 | sed -n '/[23]/h;${x;s/.* //p;}'
#

i got the same behaviour in linux & solaris

Some others:
Code:
# v=$(cal)
# echo ${v##* }
31

Code:
# echo $(cal) | tail -c 3
31

Last edited by ctsgnb; 03-15-2011 at 09:52 PM..
This User Gave Thanks to ctsgnb For This Post:
Chubler_XL
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