do_demo

speech signal process tools

#! /bin/sh
# @(#)do_demo	1.7 11/5/91 ERL
# This script starts up a specific demo.  A crude file locking 
# technique is used to reduce the probability that more than one
# demo is run at the same time.  NOTE: the existence and name of 
# this lock file is also exploited in the script edemos.sh

# Arguments:
#           $1 = temp directory
#           $2 = demo directory

demo_temp=$1
demo_dir=$2

# create temp directory if necessary, check that it is writable

if test ! -d $demo_temp
then
  mkdir $demo_temp 2> /dev/null
fi

touch $demo_temp/foo.$$ 2> /dev/null

if test -f $demo_temp/foo.$$
 then
   rm $demo_temp/foo.$$
 else 
   echo "$0($2): can't create $demo_temp or can't write in it; exiting. "
   exit 1
fi

# check demo lock file

lockfile=$demo_temp/demo.lock
message=$demo_temp/errormess

if [ -f $lockfile ]; then
rm -f $message
cat > $message << EOF
Cannot run $demo_dir demo because it appears that another demo is running.
If not, then please "rm $lockfile".
EOF

  xtext -Wp 0 0 -t "DEMO ERROR" -F $message &
  exit 1
fi

# Some demos require that scripts know where the temp directory is
# so we put its name in a temp file in the user's home directory

rm -f $HOME/.demo_temp
echo $demo_temp > $HOME/.demo_temp

# Now, we create the lockfile and invoke the demo

touch $lockfile

cd $demo_dir

echo ""
echo "Running Entropic demo: $demo_dir"

./rundemo $demo_temp

rm -f $lockfile