Show Calling Dependency

The script shows the calling sequence of a function or a script. Given the script/function name, this utility

1. displays a list of functions that are called.

2. generates a .dot file

3. uses Graphviz/dot tool to generate an .eps file that shows the dependency relationship of the functions called directly or indirectly.

4. uses gv to display the .eps file.

In order for the graphical display to work, it needs

1. The "dot" program in Graphviz. See
http://www.graphviz.org/

2. The gv (ghostview) program to show the EPS file.

System functions (those that are not in a directory whose full path name contains the user id) are ignored.