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Full Discussion: Cron for end of month
Top Forums Shell Programming and Scripting Cron for end of month Post 302650357 by agama on Saturday 2nd of June 2012 01:44:11 PM
Old 06-02-2012
I would have done it this way:

Code:
if awk -v date="$(date "+%Y %m %d" )" '
    BEGIN {
        split( date, dt, " " );
        split( "1 -2 1 0 1 0 1 1 0 1 0 1", dim, " " );                                  # days in month; sort of
        dim[2] += dt[1]%4 != 0 ? 0 : (dt[1]%100 != 0 ? 1 : (dt[1]%400 != 0 ? 0 : 1));   # adjust for leap year

        exit( !( dt[3] == dim[dt[2]] + 30) );       #true if last day, invert because for shell, exit code 0 is success 
    }
'
then
    echo "last day"    # put your logic to remove files here
else
    echo "not last day"
fi



You can test (regardless of day) by replacing the initial if expression with something like the line below which has the date hard coded:

Code:
if awk -v date="2012 06 30" '

This User Gave Thanks to agama For This Post:
 

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DATE(1) 						      General Commands Manual							   DATE(1)

NAME
date - print or set the date and time SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format] OPTIONS
-q Read the date from stdin -s Set the time (implicit for -q or a date string) -u Print the date as GMT -t Use this number of seconds instead of current time EXAMPLES
date # Print the date and time date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m. DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time, with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed by a printf-like string with the following options: %% % character %A Name of the day %B Name of the month %D mm/dd/yy %H Decimal hour on 2 digits %I Decimal hour modulo 12 on 2 digits %M Decimal minute on 2 digits %S Decimal seconds on 2 digits %T HH:MM:SS %U Decimal week number, Sunday being first day of week %W Decimal week number, Monday being first day of week %X Same as %T %Y Decimal year on 4 digits %Z Time Zone (if any) %a Abbreviated name of the day %b Abbreviated name of the month %c Appropriate date & time (default format) %d Decimal day of the month on 2 digits %e Same as %d, but a space replaces leading 0 %h Same as %b %j Decimal dey of the year on 3 digits %m Decimal month on 2 digits %n Newline character %p AM or PM %r 12-hour clock time with AM/PM %s Number of seconds since the epoch %t Tab character %w Decimal day of the week (0=Sunday) %x Same as %D %y Decimal year on 2 digits SEE ALSO
time(2), ctime(3), readclock(8). DATE(1)
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