Script to find the Last but one Friday of every month

[naveenrt]

Hi All
Is there any one who has a readymade script to find the Last but one Friday of the month .

What i mean is the script should inteligently detect that 22 id the last but one friday of the month

I need this to run a special backup on the last but one friday of the month and the rest fridays normal backup would run

$ cal
November 2002
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30

 

[alexhu]

I would set up a file with the last Fridays recorded as Julian dates (i.e day of the year in numeric format e.g today is day 318 - 'date +%j') Do this for the next 5 years.

like;

326 2002
354 2002
etc
etc

In your backup script do something like

search for the julian date in your 5 year file
check its the right year
if its there do the special backup
if not.......

Alex

 

[CaKiwi]

Here's an awk script that may help you.

cal | awk -f fri.awk

# ------ fri.awk ------
NR>2 {
if (NR==3) j = NF
if (NF) k = $NF
}
END {
f = j-1
if (f<1) f=7
while (f<=k) f+=7
print f-14
}
~
~ CaKiwi

 

[naveenrt]

CaKiwi
Great SCript . Thanks a lot for your help



Cheers
Naveen