#!/bin/sh
# http://neil.franklin.ch/Projects/webcam - webcam for SGI Indy
# author Neil Franklin, last modification 2000.09.14
# this script only works on an SGI Indy with vidtomen and imgcopy
# OK, one can do this by Apache+CGI, but where is the fun in doing that?
## inetd provides us with: waiting on port, forking, IO socket, change user
## parse HTTP request
read command
# strip the \r that HTTP allows/demands in input stream
# no ";" evaluation after "$" evaluation, so no security hole
command=`echo $command | tr -d "\r"`
# split HTTP request
method=`echo $command | cut -f 1 -d " "`
url=`echo $command | cut -f 2 -d " "`
http_version=`echo $command | cut -f 3 -d " "`
# if HTTP/1.* is being used, digest the request header fields, do nothing
if [ "$http_version" != "" ] ; then
option="dummy"
while [ "$option" != "" ] ; do
read option
option=`echo $option | tr -d "\r"`
done
fi
## decide what to do
# what method does the user want, we only implement HEAD and GET
if [ "$method" != "HEAD" -a "$method" != "GET" ] ; then
echo "HTTP/1.0 501 Not Implemented"
echo
echo ""
echo " "
echo " 501 Method Not Implemented"
echo " "
echo " "
echo " Method Not Implemented
"
echo " Method" $method "does not fit list: HEAD GET"
echo " "
echo ""
exit 1
fi
## generate HTTP response - header
# we are simple HTTP 1.0, no 1.1 fancies are supported or expected
echo "HTTP/1.0 200 OK"
# date -u for GMT, to fit RFC 2086 (HTTP/1.1) format
echo "Date:" `date -u "+%a, %d %b %Y %X GMT"`
echo "Server: http://neil.franklin.ch/Projects/squid_log, yes, sh script!"
# last mod = date (we generate output now), file date is unreliable anyway
echo "Last-Modified:" `date -u "+%a, %d %b %Y %X GMT`
echo "Connection: close"
echo "Content-type: image/gif"
echo "Content-Language: en"
echo
# method HEAD does not deliver any data, so exit now
if [ "$method" = "HEAD" ] ; then
exit 0
fi
## generate HTTP response - HTML output
/usr/sbin/vidtomem -f /tmp/webcam-$$ -c 1 2 > /dev/null 2>&1
/usr/sbin/imgcopy -n 10 /tmp/webcam-$$-00000.rgb /tmp/webcam-$$.gif > /dev/null 2>&1
/bin/cat /tmp/webcam-$$.gif
/bin/rm /tmp/webcam-$$-00000.rgb
/bin/rm /tmp/webcam-$$.gif
exit