When you enter characters, the driver will buffer the character until a RETURN. If you enter control character, the driver will take action immediately. For example, control h/w/u will cause the driver to erase a character, word or line. Once RETURN is entered, the driver will forward the entered text to the shell for processing. The shell parses the command line and looks for the command. If the command is a path (absolute or relative), it will not search the PATH. The arguments are pass to the command and not processed by the shell. The first word in the line may not be the command word. It can be a redirection etc. special character will be processed by the shell.
No comments:
Post a Comment