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#!/bin/sh
#
# Bourne shell script to decode QUERY_STRING (as set up by pcal.html or
# pcalw.html) and run 'pcal' with selected options; must be installed
# with execute permission for all
#
# expects QUERY_STRING to contain one or more of the following variables:
#
# datefile "-e" (empty calendar) or null (use default file)
# dflag optional "-D<sym>" flag to be passed to pcal (<sym>
# should not contain any special characters)
# dstyle default day style ("-[bgGO]" or null)
# font font name (can be null)
# hstyle holiday style ("-[bgGO]" or null)
# jdates Julian dates ("-[jJ]" or null)
# lang language ("-a<lang>" or null)
# mode landscape/portrait mode ("-[lp]" or null)
# month starting month (1-12; use current month if null)
# nmonths number of months (1-99; use 1 if null)
# smcal small calendar position ("-[kKS]" or null)
# wflag "-w" or null ("-w" overrides 'month' and 'nmonths')
# wstyle weekend (Sat/Sun) style ("-[bgGO]" or null)
# year two- or four-digit year; use current year if null
#
# N.B.: edit these to point to the location of the pcal executable and
# common calendar file on your system (note that the user can't use his/her
# own calendar file since most servers will execute pcal.cgi as 'nobody')
pcal=/yourpath/pcal
file=/yourpath/calendar
# set DEBUG=1 to echo debugging output as HTML text
DEBUG=0
datefile=; dflag=; dstyle=; font=; hstyle=; jdates=; lang=; # defaults
mode=; month=; moons=; nmonths=; smcal=; wflag=; wstyle=; year=;
# convert QUERY_STRING from HTML-supplied "var1=val1&var2=val2..." to /bin/sh
# "var1=val1;var2=val2..." commands; 'eval' result to set local variables
# (note that 'eval' is vulnerable to attacks from clever hackers who could
# sneak other shell commands into the request string; you may want to replace
# this with any of several more robust parsing scripts publicly available)
set -f # disable file name expansion
eval `echo $QUERY_STRING | sed -e 's/&/;/g'`
# fill in default values as needed
if [ "$month" = "" ] ; then
month=`date +%m` # use current month
fi
case "$year" in
[1-9][0-9][0-9][0-9]) # valid 4-digit year
;;
[0-9][0-9]) # valid 2-digit year (pcal supplies century)
;;
*) # null or invalid - use current year
year=`date +%y`
;;
esac
case "$nmonths" in
[0-9][0-9]) # valid 2-digit number
;;
[0-9]) # valid 1-digit number
;;
*) # null or invalid - print single month
nmonths=1
;;
esac
# additional tweaks as required by certain flags
if [ "$wflag" = "-w" ] ; then # whole-year mode: override month and nmonths
month=; nmonths=;
fi
if [ "$datefile" = "" ] ; then # use path to calendar file
datefile="-f $file"
fi
if [ "$dstyle" != "" ] ; then # append 'all' to -[bgGO] flag (default)
dstyle=$dstyle"all"
fi
if [ "$hstyle" != "" ] ; then # append 'hol' to -[bgGO] flag (holidays)
hstyle=$hstyle"hol"
fi
if [ "$wstyle" != "" ] ; then # append 'sat-sun' to -[bgGO] flag (weekends)
wstyle=$wstyle"sat-sun"
fi
# write header describing content as PostScript; run pcal (sending output
# to stdout)
if [ $DEBUG -eq 0 ] ; then
echo "Content-type: application/PostScript"
echo ""
$pcal $mode $dflag -d$font -t$font $wstyle $dstyle $hstyle $moons \
$jdates $datefile $lang $smcal $wflag $month $year $nmonths
else
echo "Content-type: text/html" # write debugging output as HTML
echo ""
echo "<title>pcal debugging information</title>"
echo "<p>QUERY_STRING = "$QUERY_STRING"</p>"
echo $pcal $mode $dflag -d$font -t$font $wstyle $dstyle $hstyle $moons \
$jdates $datefile $lang $smcal $wflag $month $year $nmonths
fi
exit 0
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