# test.esh

# Test file for esh, the example Unix shell
# Author:  Douglas W. Jones, July 22, 2003    V4.0
#
# To use this script, type, for examle, the following
# under a more fully developed Unix shell:
#   esh < test.esh

/bin/echo execute /bin/echo  -- file executed directly
echo      execute echo -- file executed using search path

echo
echo next, we test the who command, /usr/bin/who first, then who
/usr/bin/who
who

echo
echo next, we test an error
bizarreunknowncommand

echo
echo next, we try to set the environment variable TESTVAR
setenv TESTVAR value_of_TESTVAR

echo
echo next, we try to list the value of TESTVAR
# the following bit of shell scripting uses tcsh to extract and list
# the variable.  It's awful, because our shell doesn't yet support
# quoted strings as single arguments, so we had to make a real kluge
# here!
tcsh -c $argv eval echo $TESTVAR

echo
echo next, we demonstrate what happens if setenv is used incorrectly
setenv
setenv too many arguments

echo
echo next, we change PATH to .:/bin
setenv PATH .:/bin

echo
echo having done this, the command who will fail (it needs /usr/bin in PATH)
who

echo
echo now we change PATH to .:/usr/bin:/bin
setenv PATH .:/usr/bin:/bin

echo
echo now we test to see that it now finds who in /usr/bin/.
who

echo
echo End of test!