Comtrol eCos - Manual (Page 118)

alias
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.
Examples
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
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