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set editing-mode vi
The readline interface uses the .inputrc file to
control the settings.
set history filename fname
Set the name of the GDB command history file
to fname. This is the file where GDB reads an
initial command history list, and where it writes
the command history from this session when it
exits. You can access this list through history
expansion or through the history command
editing characters listed below. This file defaults
to the value of the environment variable
GDBHISTFILE, or to ./.gdb_history (./
_gdb_history on MS-DOS) if this variable is
not set.
set history save, set history save on Record command history in a file, whose name
may be specified with the set history
filename command. By default, this option is
disabled.
set history save off Stop recording command history in a file.
set history size size
Set the number of commands which GDB keeps
in its history list. This defaults to the value of the
environment variable HISTSIZE, or to 256 if this
variable is not set.
History expansion assigns special meaning to the character !.
Since ! is also the logical not operator in C, history expansion is o by default. If you
decide to enable history expansion with the set history expansion on command, you
may sometimes need to follow ! (when it is used as logical not, in an expression) with
a space or a tab to prevent it from being expanded. The readline history facilities do
not attempt substitution on the strings != and !(, even when history expansion is
enabled.
The commands to control history expansion are:
set history expansion on, set history
expansion
Enable history expansion. History expansion is
o by default.
set history expansion off Disable history expansion.
The readline code comes with more complete
documentation of editing and history expansion
features. Users unfamiliar with GNU Emacs or vi
may wish to read it.
show history, show history filename,
show history save, show history
size, show history expansion
These commands display the state of the GDB
history parameters. show history by itself
displays all four states.
282 Controlling GDB