#daysbetween()

DESCRIPTION
    returns the number of days between two date values
SYNOPSIS
    #daysbetween(d1,d2)
ARGUMENTS
    d1 - a datevalue, or datevalue expression
    d2 - a datevalue, or datevalue expression
EXAMPLES
QueuedMailOld

        init
                status active
                level warning
                task "Report old messages in the mail queue"
                input proc "=mailq"
                filter "=egrep '^[A-Z]' | =awk 'NF==7'"
                dat $ident      1
                dat #size       2
                dat $dow        3
                dat $mon        4
                dat #date       5
                dat $time       6
                dat $sender     7

        begin
                set #timenow = #now()
                set #yr = #year()

        rule
                set #mn = #monthnumber($mon)
                set #msgage = #daysbetween(#datevalue(#yr, #mn, #date), #timenow)

        rule    // dispose of possible ending "*" in ident
                if $right($ident,1) eq "\*"
                        set $ident2 = $chop($ident)
                else
                        set $ident2 = $ident
                endif

        rule    // delete after 7 days
                if #msgage > 7
                        =execwait "=rm =mqueue\/\*$substring($ident2,2)\*"
                        next
                endif

        rule    // warn after 5 days
                if    #msgage > 5
                   || #msgage < 0               // at turn of year
                        output mail "old:   $inline"
                endif
SEE ALSO
    Numerical Functions
    String Functions
 
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