#!/bin/csh
# update-header -- update expiration and modification dates on faq header;
#                  modified output is written to standard output.
#

# get and parse the date
set today = `date "+%m %d %y"`
@ month = $today[1]
@ day   = $today[2]
@ year  = $today[3] + 2000

if ($month == 12) then
  @ nextmonth = 1
  @ nextyear = $year + 1
else
  @ nextmonth = $month + 1
  @ nextyear = $year
endif

set monthnames = `echo "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"`

sed -e "s/Expires:.*/Expires: $day $monthnames[$nextmonth] $nextyear/" \
    -e "s/Last-modified:.*/Last-modified: $day $monthnames[$month] $year/" \
    < $1