The alias command is used to maintain simple command line aliases. These aliases are shorthand for longer expressions. When the pattern %{name} appears in a command line, including in a script, the corresponding value will be substituted. Aliases may be nested.
If no value is provided, then the current value of the alias is displayed.
If the system supports non-volatile configuration data via the fconfig command (see the Section called Persistent State Flash-based Configuration and Control in Chapter 2), then the value will be saved and used when the system is reset.
Set an alias.
RedBoot> alias joe "This is Joe" Update RedBoot non-volatile configuration - continue (y/n)? n |
Display an alias.
RedBoot> alias joe 'joe' = 'This is Joe' |
Use an alias. Note: the "=" command simply echoes the command to to console.
RedBoot> = %{joe}
This is Joe |
Aliases can be nested.
RedBoot> alias frank "Who are you? %{joe}"
Update RedBoot non-volatile configuration - continue (y/n)? n
RedBoot> = %{frank}
Who are you? This is Joe |
Notice how the value of %{frank} changes when %{joe} is changed since the value of %{joe} is not evaluated until %{frank} is evaluated.
RedBoot> alias joe "This is now Josephine"
Update RedBoot non-volatile configuration - continue (y/n)? n
RedBoot> = %{frank}
Who are you? This is now Josephine |