: Testing a script and running programs.
Program Checking: Checking programs existence.
Program Executing: Execut... _program_check program ?program ...? Function
Checks the availability of programs. All the pathnames on the command line are checked: if one is not executable an error message is p... me()
# char_name
# to call: char_name string
# check if $1 does indeed contain only characters a-z,A-Z... nd proper cursor controls would be used, as would checking for zero length fields.
Here's what the output
