Switch Management
33
Tab
When a string for a command or keyword is entered, the Tab can
be used to complete the command or keyword if there is no
conflict.
1.2.4
Help Function
There are two ways in Switc
h for the user to access help information: the ―help‖
command and the ―?‖.
Access to Help
Usage and function
Help
Under any command line prompt, type in ―help‖ and press Enter will get
a brief description of the associated help system.
―?‖
1
．
Under any command line prompt, enter ―?‖ to get a command list of
the current mode and related brief description.
2
．
Enter a ―?‖ after the command keyword with an embedded space.
If the position should be a parameter, a description of that
parameter type, scope, etc, will be returned; if the position should
be a keyword, then a set of keywords with brief description will be
returned; if the output is ―<cr>―, then the command is complete,
press Enter to run the command.
3
．
A ―?‖ immediately following a string. This will display all the
commands that begin with that string.
1.2.5
Input Verification
1.2.5.1
Returned Information: success
All commands entered through keyboards undergo syntax check by the Shell.
Nothing will be returned if the user entered a correct command under corresponding
modes and the execution is successful.
Returned Information: error
Output error message
Explanation
Unrecognized command or illegal
parameter!
The entered command does not exist, or there is
error in parameter scope, type or format.
Ambiguous command
At least two interpretations is possible basing on
the current input.
Invalid command or parameter
The command is recognized, but no valid