12-12-2006
Incase it's easier to read with out the line numbers.....
#!/bin/ksh
while :
do
clear
cat <<++
**** MAIN MENU ****
1) Delete a file
2) Rename a file
3) Find a file
4) Display contents of a file using cat
5) Edit a file using vi
6) List the contents of a directory
7) Print todays date & time
8) Show users currently logged in
x) Exit
++
echo "Please enter your selection $LOGNAME \c'
read selection
case $selection in
1)
echo "Enter a filename: \c"
read fname
if [ -r $fname ]
then
rm $fname
else
echo "menu: Cannot access file $fname"
fi
;;
2)
echo "Enter a filename: \c"
read fname
echo "Enter a new filename: \c"
read frename
if [ -r $fname ]
then
cp $fname $frename
else
echo "menu: Cannot access the file $fname"
fi
;;
3)
echo "Enter a filename: \c"
read fname
find . -name "$fname" -print
;;
4)
echo "Enter a filename: \c"
read fname
if [ -r $fname ]
then
cat $fname
else
echo "menu: Cannot access the file $fname \c"
fi
;;
5)
echo "Enter a filename: \c"
read fname
if [ -r $fname ]
then
vi $fname
else
echo "menu: Cannot access the file $fname \c"
6)
echo "Enter a directory name: \c"
read dname
if [ -r $dname ]
then
ls -l $dname
else
echo "menu: Cannot access the directory $dname"
fi
;;
7)
date
;;
8)
who
;;
q|Q|e|E|x|X)
exit 0
;;
*) echo "Invalid choice. Try again.";;
esac
echo "Press Enter to continue \c"
done
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LEARN ABOUT OPENDARWIN
catch
catch(n) Tcl Built-In Commands catch(n)
__________________________________________________________________________________________________________________________________________________
NAME
catch - Evaluate script and trap exceptional returns
SYNOPSIS
catch script ?varName?
_________________________________________________________________
DESCRIPTION
The catch command may be used to prevent errors from aborting command interpretation. Catch calls the Tcl interpreter recursively to exe-
cute script, and always returns without raising an error, regardless of any errors that might occur while executing script.
If script raises an error, catch will return a non-zero integer value corresponding to one of the exceptional return codes (see tcl.h for
the definitions of code values). If the varName argument is given, then the variable it names is set to the error message from interpret-
ing script.
If script does not raise an error, catch will return 0 (TCL_OK) and set the variable to the value returned from script.
Note that catch catches all exceptions, including those generated by break and continue as well as errors. The only errors that are not
caught are syntax errors found when the script is compiled. This is because the catch command only catches errors during runtime. When
the catch statement is compiled, the script is compiled as well and any syntax errors will generate a Tcl error.
EXAMPLES
The catch command may be used in an if to branch based on the success of a script.
if { [catch {open $someFile w} fid] } {
puts stderr "Could not open $someFile for writing
$fid"
exit 1
}
The catch command will not catch compiled syntax errors. The first time proc foo is called, the body will be compiled and a Tcl error will
be generated.
proc foo {} {
catch {expr {1 +- }}
}
SEE ALSO
error(n), break(n), continue(n)
KEYWORDS
catch, error
Tcl 8.0 catch(n)