(features.info)Korn Shell Variables
Korn Shell Variables
The default variable for the `read' builtin.
Each time this parameter is referenced, a random integer is
generated. Assigning a value to this variable seeds the random
This variable expands to the number of seconds since the shell was
started. Assignment to this variable resets the count to the
value assigned, and the expanded value becomes the value assigned
plus the number of seconds since the assignment.
The value of this variable is used as the prompt for the `select'
This is the prompt printed before the command line is echoed when
the `-x' option is set (Note: The Set Builtin.).
The current working directory as set by the `cd' builtin.
The previous working directory as set by the `cd' builtin.
If set to a value greater than zero, the value is interpreted as
the number of seconds to wait for input after issuing the primary
prompt. Bash terminates after that number of seconds if input does
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