B.9 Readline Interaction

The following predicates are available if SWI-Prolog is linked to the GNU readline library. This is by default the case on non-Windows installations and indicated by the Prolog flag readline.^{163swipl-win.exe uses its own history system and does not support these predicates.} See also readline(3).

rl_read_init_file(+File)

Read a readline initialisation file. Readline by default reads /.inputrc. This predicate may be used to read alternative readline initialisation files.

rl_add_history(+Line)

Add a line to the Control-P/Control-N history system of the readline library.

rl_write_history(+FileName)

Write current history to FileName. Can be used from at_halt/1 to save the history.

rl_read_history(+FileName)

Read history from FileName, appending to the current history.