5836a818ec
This reverts commitb558ff043d. This reverts commit4a11f20659. The initial import commit failed to retain local changes made to readline's configure.in (and the commit message erroneously stated that there were no local changes that needed to be reapplied). Also the import caused a couple of build errors and a scattering of testsuite regressions throughout many arches. It's probably better to start over with this import, hopefully more carefully next time.
2038 lines
72 KiB
Plaintext
2038 lines
72 KiB
Plaintext
@comment %**start of header (This is for running Texinfo on a region.)
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@setfilename rluser.info
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@comment %**end of header (This is for running Texinfo on a region.)
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@ignore
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This file documents the end user interface to the GNU command line
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editing features. It is to be an appendix to manuals for programs which
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use these features. There is a document entitled "readline.texinfo"
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which contains both end-user and programmer documentation for the
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GNU Readline Library.
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Copyright (C) 1988--2011 Free Software Foundation, Inc.
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Authored by Brian Fox and Chet Ramey.
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Permission is granted to process this file through Tex and print the
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results, provided the printed document carries copying permission notice
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identical to this one except for the removal of this paragraph (this
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paragraph not being relevant to the printed manual).
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Permission is granted to make and distribute verbatim copies of this manual
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provided the copyright notice and this permission notice are preserved on
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all copies.
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided also that the
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GNU Copyright statement is available to the distributee, and provided that
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the entire resulting derived work is distributed under the terms of a
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permission notice identical to this one.
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Permission is granted to copy and distribute translations of this manual
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into another language, under the above conditions for modified versions.
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@end ignore
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@comment If you are including this manual as an appendix, then set the
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@comment variable readline-appendix.
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@ifclear BashFeatures
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@defcodeindex bt
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@end ifclear
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@node Command Line Editing
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@chapter Command Line Editing
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This chapter describes the basic features of the @sc{gnu}
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command line editing interface.
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@ifset BashFeatures
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Command line editing is provided by the Readline library, which is
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used by several different programs, including Bash.
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Command line editing is enabled by default when using an interactive shell,
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unless the @option{--noediting} option is supplied at shell invocation.
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Line editing is also used when using the @option{-e} option to the
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@code{read} builtin command (@pxref{Bash Builtins}).
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By default, the line editing commands are similar to those of Emacs.
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A vi-style line editing interface is also available.
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Line editing can be enabled at any time using the @option{-o emacs} or
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@option{-o vi} options to the @code{set} builtin command
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(@pxref{The Set Builtin}), or disabled using the @option{+o emacs} or
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@option{+o vi} options to @code{set}.
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@end ifset
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@menu
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* Introduction and Notation:: Notation used in this text.
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* Readline Interaction:: The minimum set of commands for editing a line.
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* Readline Init File:: Customizing Readline from a user's view.
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* Bindable Readline Commands:: A description of most of the Readline commands
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available for binding
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* Readline vi Mode:: A short description of how to make Readline
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behave like the vi editor.
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@ifset BashFeatures
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* Programmable Completion:: How to specify the possible completions for
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a specific command.
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* Programmable Completion Builtins:: Builtin commands to specify how to
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complete arguments for a particular command.
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@end ifset
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@end menu
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@node Introduction and Notation
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@section Introduction to Line Editing
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The following paragraphs describe the notation used to represent
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keystrokes.
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The text @kbd{C-k} is read as `Control-K' and describes the character
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produced when the @key{k} key is pressed while the Control key
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is depressed.
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The text @kbd{M-k} is read as `Meta-K' and describes the character
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produced when the Meta key (if you have one) is depressed, and the @key{k}
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key is pressed.
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The Meta key is labeled @key{ALT} on many keyboards.
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On keyboards with two keys labeled @key{ALT} (usually to either side of
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the space bar), the @key{ALT} on the left side is generally set to
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work as a Meta key.
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The @key{ALT} key on the right may also be configured to work as a
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Meta key or may be configured as some other modifier, such as a
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Compose key for typing accented characters.
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If you do not have a Meta or @key{ALT} key, or another key working as
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a Meta key, the identical keystroke can be generated by typing @key{ESC}
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@emph{first}, and then typing @key{k}.
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Either process is known as @dfn{metafying} the @key{k} key.
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The text @kbd{M-C-k} is read as `Meta-Control-k' and describes the
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character produced by @dfn{metafying} @kbd{C-k}.
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In addition, several keys have their own names. Specifically,
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@key{DEL}, @key{ESC}, @key{LFD}, @key{SPC}, @key{RET}, and @key{TAB} all
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stand for themselves when seen in this text, or in an init file
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(@pxref{Readline Init File}).
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If your keyboard lacks a @key{LFD} key, typing @key{C-j} will
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produce the desired character.
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The @key{RET} key may be labeled @key{Return} or @key{Enter} on
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some keyboards.
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@node Readline Interaction
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@section Readline Interaction
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@cindex interaction, readline
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Often during an interactive session you type in a long line of text,
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only to notice that the first word on the line is misspelled. The
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Readline library gives you a set of commands for manipulating the text
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as you type it in, allowing you to just fix your typo, and not forcing
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you to retype the majority of the line. Using these editing commands,
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you move the cursor to the place that needs correction, and delete or
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insert the text of the corrections. Then, when you are satisfied with
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the line, you simply press @key{RET}. You do not have to be at the
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end of the line to press @key{RET}; the entire line is accepted
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regardless of the location of the cursor within the line.
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@menu
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* Readline Bare Essentials:: The least you need to know about Readline.
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* Readline Movement Commands:: Moving about the input line.
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* Readline Killing Commands:: How to delete text, and how to get it back!
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* Readline Arguments:: Giving numeric arguments to commands.
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* Searching:: Searching through previous lines.
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@end menu
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@node Readline Bare Essentials
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@subsection Readline Bare Essentials
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@cindex notation, readline
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@cindex command editing
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@cindex editing command lines
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In order to enter characters into the line, simply type them. The typed
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character appears where the cursor was, and then the cursor moves one
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space to the right. If you mistype a character, you can use your
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erase character to back up and delete the mistyped character.
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Sometimes you may mistype a character, and
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not notice the error until you have typed several other characters. In
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that case, you can type @kbd{C-b} to move the cursor to the left, and then
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correct your mistake. Afterwards, you can move the cursor to the right
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with @kbd{C-f}.
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When you add text in the middle of a line, you will notice that characters
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to the right of the cursor are `pushed over' to make room for the text
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that you have inserted. Likewise, when you delete text behind the cursor,
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characters to the right of the cursor are `pulled back' to fill in the
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blank space created by the removal of the text. A list of the bare
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essentials for editing the text of an input line follows.
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@table @asis
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@item @kbd{C-b}
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Move back one character.
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@item @kbd{C-f}
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Move forward one character.
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@item @key{DEL} or @key{Backspace}
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Delete the character to the left of the cursor.
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@item @kbd{C-d}
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Delete the character underneath the cursor.
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@item @w{Printing characters}
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Insert the character into the line at the cursor.
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@item @kbd{C-_} or @kbd{C-x C-u}
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Undo the last editing command. You can undo all the way back to an
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empty line.
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@end table
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@noindent
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(Depending on your configuration, the @key{Backspace} key be set to
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delete the character to the left of the cursor and the @key{DEL} key set
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to delete the character underneath the cursor, like @kbd{C-d}, rather
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than the character to the left of the cursor.)
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@node Readline Movement Commands
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@subsection Readline Movement Commands
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The above table describes the most basic keystrokes that you need
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in order to do editing of the input line. For your convenience, many
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other commands have been added in addition to @kbd{C-b}, @kbd{C-f},
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@kbd{C-d}, and @key{DEL}. Here are some commands for moving more rapidly
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about the line.
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@table @kbd
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@item C-a
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Move to the start of the line.
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@item C-e
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Move to the end of the line.
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@item M-f
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Move forward a word, where a word is composed of letters and digits.
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@item M-b
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Move backward a word.
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@item C-l
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Clear the screen, reprinting the current line at the top.
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@end table
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Notice how @kbd{C-f} moves forward a character, while @kbd{M-f} moves
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forward a word. It is a loose convention that control keystrokes
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operate on characters while meta keystrokes operate on words.
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@node Readline Killing Commands
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@subsection Readline Killing Commands
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@cindex killing text
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@cindex yanking text
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@dfn{Killing} text means to delete the text from the line, but to save
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it away for later use, usually by @dfn{yanking} (re-inserting)
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it back into the line.
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(`Cut' and `paste' are more recent jargon for `kill' and `yank'.)
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If the description for a command says that it `kills' text, then you can
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be sure that you can get the text back in a different (or the same)
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place later.
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When you use a kill command, the text is saved in a @dfn{kill-ring}.
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Any number of consecutive kills save all of the killed text together, so
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that when you yank it back, you get it all. The kill
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ring is not line specific; the text that you killed on a previously
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typed line is available to be yanked back later, when you are typing
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another line.
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@cindex kill ring
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Here is the list of commands for killing text.
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@table @kbd
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@item C-k
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Kill the text from the current cursor position to the end of the line.
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@item M-d
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Kill from the cursor to the end of the current word, or, if between
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words, to the end of the next word.
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Word boundaries are the same as those used by @kbd{M-f}.
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@item M-@key{DEL}
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Kill from the cursor the start of the current word, or, if between
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words, to the start of the previous word.
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Word boundaries are the same as those used by @kbd{M-b}.
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@item C-w
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Kill from the cursor to the previous whitespace. This is different than
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@kbd{M-@key{DEL}} because the word boundaries differ.
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@end table
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Here is how to @dfn{yank} the text back into the line. Yanking
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means to copy the most-recently-killed text from the kill buffer.
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@table @kbd
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@item C-y
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Yank the most recently killed text back into the buffer at the cursor.
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@item M-y
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Rotate the kill-ring, and yank the new top. You can only do this if
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the prior command is @kbd{C-y} or @kbd{M-y}.
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@end table
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@node Readline Arguments
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@subsection Readline Arguments
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You can pass numeric arguments to Readline commands. Sometimes the
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argument acts as a repeat count, other times it is the @i{sign} of the
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argument that is significant. If you pass a negative argument to a
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command which normally acts in a forward direction, that command will
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act in a backward direction. For example, to kill text back to the
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start of the line, you might type @samp{M-- C-k}.
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The general way to pass numeric arguments to a command is to type meta
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digits before the command. If the first `digit' typed is a minus
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sign (@samp{-}), then the sign of the argument will be negative. Once
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you have typed one meta digit to get the argument started, you can type
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the remainder of the digits, and then the command. For example, to give
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the @kbd{C-d} command an argument of 10, you could type @samp{M-1 0 C-d},
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which will delete the next ten characters on the input line.
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@node Searching
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@subsection Searching for Commands in the History
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Readline provides commands for searching through the command history
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@ifset BashFeatures
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(@pxref{Bash History Facilities})
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@end ifset
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for lines containing a specified string.
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There are two search modes: @dfn{incremental} and @dfn{non-incremental}.
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Incremental searches begin before the user has finished typing the
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search string.
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As each character of the search string is typed, Readline displays
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the next entry from the history matching the string typed so far.
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An incremental search requires only as many characters as needed to
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find the desired history entry.
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To search backward in the history for a particular string, type
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@kbd{C-r}. Typing @kbd{C-s} searches forward through the history.
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The characters present in the value of the @code{isearch-terminators} variable
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are used to terminate an incremental search.
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If that variable has not been assigned a value, the @key{ESC} and
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@kbd{C-J} characters will terminate an incremental search.
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@kbd{C-g} will abort an incremental search and restore the original line.
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When the search is terminated, the history entry containing the
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search string becomes the current line.
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To find other matching entries in the history list, type @kbd{C-r} or
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@kbd{C-s} as appropriate.
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This will search backward or forward in the history for the next
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entry matching the search string typed so far.
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Any other key sequence bound to a Readline command will terminate
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the search and execute that command.
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For instance, a @key{RET} will terminate the search and accept
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the line, thereby executing the command from the history list.
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A movement command will terminate the search, make the last line found
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the current line, and begin editing.
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Readline remembers the last incremental search string. If two
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@kbd{C-r}s are typed without any intervening characters defining a new
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search string, any remembered search string is used.
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Non-incremental searches read the entire search string before starting
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to search for matching history lines. The search string may be
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typed by the user or be part of the contents of the current line.
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@node Readline Init File
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@section Readline Init File
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@cindex initialization file, readline
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Although the Readline library comes with a set of Emacs-like
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keybindings installed by default, it is possible to use a different set
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of keybindings.
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Any user can customize programs that use Readline by putting
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commands in an @dfn{inputrc} file, conventionally in his home directory.
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The name of this
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@ifset BashFeatures
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file is taken from the value of the shell variable @env{INPUTRC}. If
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@end ifset
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@ifclear BashFeatures
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file is taken from the value of the environment variable @env{INPUTRC}. If
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@end ifclear
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that variable is unset, the default is @file{~/.inputrc}. If that
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file does not exist or cannot be read, the ultimate default is
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@file{/etc/inputrc}.
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When a program which uses the Readline library starts up, the
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init file is read, and the key bindings are set.
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In addition, the @code{C-x C-r} command re-reads this init file, thus
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incorporating any changes that you might have made to it.
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@menu
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* Readline Init File Syntax:: Syntax for the commands in the inputrc file.
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* Conditional Init Constructs:: Conditional key bindings in the inputrc file.
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* Sample Init File:: An example inputrc file.
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@end menu
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@node Readline Init File Syntax
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@subsection Readline Init File Syntax
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There are only a few basic constructs allowed in the
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Readline init file. Blank lines are ignored.
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Lines beginning with a @samp{#} are comments.
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Lines beginning with a @samp{$} indicate conditional
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constructs (@pxref{Conditional Init Constructs}). Other lines
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denote variable settings and key bindings.
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@table @asis
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@item Variable Settings
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You can modify the run-time behavior of Readline by
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altering the values of variables in Readline
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using the @code{set} command within the init file.
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The syntax is simple:
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@example
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set @var{variable} @var{value}
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@end example
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@noindent
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|
Here, for example, is how to
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change from the default Emacs-like key binding to use
|
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@code{vi} line editing commands:
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@example
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set editing-mode vi
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@end example
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Variable names and values, where appropriate, are recognized without regard
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to case. Unrecognized variable names are ignored.
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Boolean variables (those that can be set to on or off) are set to on if
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the value is null or empty, @var{on} (case-insensitive), or 1. Any other
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value results in the variable being set to off.
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@ifset BashFeatures
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The @w{@code{bind -V}} command lists the current Readline variable names
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|
and values. @xref{Bash Builtins}.
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@end ifset
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|
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A great deal of run-time behavior is changeable with the following
|
|
variables.
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@cindex variables, readline
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|
@table @code
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@item bell-style
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@vindex bell-style
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Controls what happens when Readline wants to ring the terminal bell.
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If set to @samp{none}, Readline never rings the bell. If set to
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@samp{visible}, Readline uses a visible bell if one is available.
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If set to @samp{audible} (the default), Readline attempts to ring
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the terminal's bell.
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@item bind-tty-special-chars
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@vindex bind-tty-special-chars
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If set to @samp{on}, Readline attempts to bind the control characters
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treated specially by the kernel's terminal driver to their Readline
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equivalents.
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@item comment-begin
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@vindex comment-begin
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The string to insert at the beginning of the line when the
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@code{insert-comment} command is executed. The default value
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is @code{"#"}.
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@item completion-display-width
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|
@vindex completion-display-width
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|
The number of screen columns used to display possible matches
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when performing completion.
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The value is ignored if it is less than 0 or greater than the terminal
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screen width.
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A value of 0 will cause matches to be displayed one per line.
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The default value is -1.
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@item completion-ignore-case
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@vindex completion-ignore-case
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If set to @samp{on}, Readline performs filename matching and completion
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in a case-insensitive fashion.
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The default value is @samp{off}.
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@item completion-map-case
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@vindex completion-map-case
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If set to @samp{on}, and @var{completion-ignore-case} is enabled, Readline
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treats hyphens (@samp{-}) and underscores (@samp{_}) as equivalent when
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performing case-insensitive filename matching and completion.
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@item completion-prefix-display-length
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|
@vindex completion-prefix-display-length
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|
The length in characters of the common prefix of a list of possible
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completions that is displayed without modification. When set to a
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value greater than zero, common prefixes longer than this value are
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|
replaced with an ellipsis when displaying possible completions.
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|
@item completion-query-items
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|
@vindex completion-query-items
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The number of possible completions that determines when the user is
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asked whether the list of possibilities should be displayed.
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If the number of possible completions is greater than this value,
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Readline will ask the user whether or not he wishes to view
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them; otherwise, they are simply listed.
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This variable must be set to an integer value greater than or equal to 0.
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A negative value means Readline should never ask.
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The default limit is @code{100}.
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@item convert-meta
|
|
@vindex convert-meta
|
|
If set to @samp{on}, Readline will convert characters with the
|
|
eighth bit set to an @sc{ascii} key sequence by stripping the eighth
|
|
bit and prefixing an @key{ESC} character, converting them to a
|
|
meta-prefixed key sequence. The default value is @samp{on}.
|
|
|
|
@item disable-completion
|
|
@vindex disable-completion
|
|
If set to @samp{On}, Readline will inhibit word completion.
|
|
Completion characters will be inserted into the line as if they had
|
|
been mapped to @code{self-insert}. The default is @samp{off}.
|
|
|
|
@item editing-mode
|
|
@vindex editing-mode
|
|
The @code{editing-mode} variable controls which default set of
|
|
key bindings is used. By default, Readline starts up in Emacs editing
|
|
mode, where the keystrokes are most similar to Emacs. This variable can be
|
|
set to either @samp{emacs} or @samp{vi}.
|
|
|
|
@item echo-control-characters
|
|
When set to @samp{on}, on operating systems that indicate they support it,
|
|
readline echoes a character corresponding to a signal generated from the
|
|
keyboard. The default is @samp{on}.
|
|
|
|
@item enable-keypad
|
|
@vindex enable-keypad
|
|
When set to @samp{on}, Readline will try to enable the application
|
|
keypad when it is called. Some systems need this to enable the
|
|
arrow keys. The default is @samp{off}.
|
|
|
|
@item enable-meta-key
|
|
When set to @samp{on}, Readline will try to enable any meta modifier
|
|
key the terminal claims to support when it is called. On many terminals,
|
|
the meta key is used to send eight-bit characters.
|
|
The default is @samp{on}.
|
|
|
|
@item expand-tilde
|
|
@vindex expand-tilde
|
|
If set to @samp{on}, tilde expansion is performed when Readline
|
|
attempts word completion. The default is @samp{off}.
|
|
|
|
@item history-preserve-point
|
|
@vindex history-preserve-point
|
|
If set to @samp{on}, the history code attempts to place the point (the
|
|
current cursor position) at the
|
|
same location on each history line retrieved with @code{previous-history}
|
|
or @code{next-history}. The default is @samp{off}.
|
|
|
|
@item history-size
|
|
@vindex history-size
|
|
Set the maximum number of history entries saved in the history list. If
|
|
set to zero, the number of entries in the history list is not limited.
|
|
|
|
@item horizontal-scroll-mode
|
|
@vindex horizontal-scroll-mode
|
|
This variable can be set to either @samp{on} or @samp{off}. Setting it
|
|
to @samp{on} means that the text of the lines being edited will scroll
|
|
horizontally on a single screen line when they are longer than the width
|
|
of the screen, instead of wrapping onto a new screen line. By default,
|
|
this variable is set to @samp{off}.
|
|
|
|
@item input-meta
|
|
@vindex input-meta
|
|
@vindex meta-flag
|
|
If set to @samp{on}, Readline will enable eight-bit input (it
|
|
will not clear the eighth bit in the characters it reads),
|
|
regardless of what the terminal claims it can support. The
|
|
default value is @samp{off}. The name @code{meta-flag} is a
|
|
synonym for this variable.
|
|
|
|
@item isearch-terminators
|
|
@vindex isearch-terminators
|
|
The string of characters that should terminate an incremental search without
|
|
subsequently executing the character as a command (@pxref{Searching}).
|
|
If this variable has not been given a value, the characters @key{ESC} and
|
|
@kbd{C-J} will terminate an incremental search.
|
|
|
|
@item keymap
|
|
@vindex keymap
|
|
Sets Readline's idea of the current keymap for key binding commands.
|
|
Acceptable @code{keymap} names are
|
|
@code{emacs},
|
|
@code{emacs-standard},
|
|
@code{emacs-meta},
|
|
@code{emacs-ctlx},
|
|
@code{vi},
|
|
@code{vi-move},
|
|
@code{vi-command}, and
|
|
@code{vi-insert}.
|
|
@code{vi} is equivalent to @code{vi-command}; @code{emacs} is
|
|
equivalent to @code{emacs-standard}. The default value is @code{emacs}.
|
|
The value of the @code{editing-mode} variable also affects the
|
|
default keymap.
|
|
|
|
@item mark-directories
|
|
If set to @samp{on}, completed directory names have a slash
|
|
appended. The default is @samp{on}.
|
|
|
|
@item mark-modified-lines
|
|
@vindex mark-modified-lines
|
|
This variable, when set to @samp{on}, causes Readline to display an
|
|
asterisk (@samp{*}) at the start of history lines which have been modified.
|
|
This variable is @samp{off} by default.
|
|
|
|
@item mark-symlinked-directories
|
|
@vindex mark-symlinked-directories
|
|
If set to @samp{on}, completed names which are symbolic links
|
|
to directories have a slash appended (subject to the value of
|
|
@code{mark-directories}).
|
|
The default is @samp{off}.
|
|
|
|
@item match-hidden-files
|
|
@vindex match-hidden-files
|
|
This variable, when set to @samp{on}, causes Readline to match files whose
|
|
names begin with a @samp{.} (hidden files) when performing filename
|
|
completion.
|
|
If set to @samp{off}, the leading @samp{.} must be
|
|
supplied by the user in the filename to be completed.
|
|
This variable is @samp{on} by default.
|
|
|
|
@item menu-complete-display-prefix
|
|
@vindex menu-complete-display-prefix
|
|
If set to @samp{on}, menu completion displays the common prefix of the
|
|
list of possible completions (which may be empty) before cycling through
|
|
the list. The default is @samp{off}.
|
|
|
|
@item output-meta
|
|
@vindex output-meta
|
|
If set to @samp{on}, Readline will display characters with the
|
|
eighth bit set directly rather than as a meta-prefixed escape
|
|
sequence. The default is @samp{off}.
|
|
|
|
@item page-completions
|
|
@vindex page-completions
|
|
If set to @samp{on}, Readline uses an internal @code{more}-like pager
|
|
to display a screenful of possible completions at a time.
|
|
This variable is @samp{on} by default.
|
|
|
|
@item print-completions-horizontally
|
|
If set to @samp{on}, Readline will display completions with matches
|
|
sorted horizontally in alphabetical order, rather than down the screen.
|
|
The default is @samp{off}.
|
|
|
|
@item revert-all-at-newline
|
|
@vindex revert-all-at-newline
|
|
If set to @samp{on}, Readline will undo all changes to history lines
|
|
before returning when @code{accept-line} is executed. By default,
|
|
history lines may be modified and retain individual undo lists across
|
|
calls to @code{readline}. The default is @samp{off}.
|
|
|
|
@item show-all-if-ambiguous
|
|
@vindex show-all-if-ambiguous
|
|
This alters the default behavior of the completion functions. If
|
|
set to @samp{on},
|
|
words which have more than one possible completion cause the
|
|
matches to be listed immediately instead of ringing the bell.
|
|
The default value is @samp{off}.
|
|
|
|
@item show-all-if-unmodified
|
|
@vindex show-all-if-unmodified
|
|
This alters the default behavior of the completion functions in
|
|
a fashion similar to @var{show-all-if-ambiguous}.
|
|
If set to @samp{on},
|
|
words which have more than one possible completion without any
|
|
possible partial completion (the possible completions don't share
|
|
a common prefix) cause the matches to be listed immediately instead
|
|
of ringing the bell.
|
|
The default value is @samp{off}.
|
|
|
|
@item skip-completed-text
|
|
@vindex skip-completed-text
|
|
If set to @samp{on}, this alters the default completion behavior when
|
|
inserting a single match into the line. It's only active when
|
|
performing completion in the middle of a word. If enabled, readline
|
|
does not insert characters from the completion that match characters
|
|
after point in the word being completed, so portions of the word
|
|
following the cursor are not duplicated.
|
|
For instance, if this is enabled, attempting completion when the cursor
|
|
is after the @samp{e} in @samp{Makefile} will result in @samp{Makefile}
|
|
rather than @samp{Makefilefile}, assuming there is a single possible
|
|
completion.
|
|
The default value is @samp{off}.
|
|
|
|
@item visible-stats
|
|
@vindex visible-stats
|
|
If set to @samp{on}, a character denoting a file's type
|
|
is appended to the filename when listing possible
|
|
completions. The default is @samp{off}.
|
|
|
|
@end table
|
|
|
|
@item Key Bindings
|
|
The syntax for controlling key bindings in the init file is
|
|
simple. First you need to find the name of the command that you
|
|
want to change. The following sections contain tables of the command
|
|
name, the default keybinding, if any, and a short description of what
|
|
the command does.
|
|
|
|
Once you know the name of the command, simply place on a line
|
|
in the init file the name of the key
|
|
you wish to bind the command to, a colon, and then the name of the
|
|
command.
|
|
There can be no space between the key name and the colon -- that will be
|
|
interpreted as part of the key name.
|
|
The name of the key can be expressed in different ways, depending on
|
|
what you find most comfortable.
|
|
|
|
In addition to command names, readline allows keys to be bound
|
|
to a string that is inserted when the key is pressed (a @var{macro}).
|
|
|
|
@ifset BashFeatures
|
|
The @w{@code{bind -p}} command displays Readline function names and
|
|
bindings in a format that can put directly into an initialization file.
|
|
@xref{Bash Builtins}.
|
|
@end ifset
|
|
|
|
@table @asis
|
|
@item @w{@var{keyname}: @var{function-name} or @var{macro}}
|
|
@var{keyname} is the name of a key spelled out in English. For example:
|
|
@example
|
|
Control-u: universal-argument
|
|
Meta-Rubout: backward-kill-word
|
|
Control-o: "> output"
|
|
@end example
|
|
|
|
In the above example, @kbd{C-u} is bound to the function
|
|
@code{universal-argument},
|
|
@kbd{M-DEL} is bound to the function @code{backward-kill-word}, and
|
|
@kbd{C-o} is bound to run the macro
|
|
expressed on the right hand side (that is, to insert the text
|
|
@samp{> output} into the line).
|
|
|
|
A number of symbolic character names are recognized while
|
|
processing this key binding syntax:
|
|
@var{DEL},
|
|
@var{ESC},
|
|
@var{ESCAPE},
|
|
@var{LFD},
|
|
@var{NEWLINE},
|
|
@var{RET},
|
|
@var{RETURN},
|
|
@var{RUBOUT},
|
|
@var{SPACE},
|
|
@var{SPC},
|
|
and
|
|
@var{TAB}.
|
|
|
|
@item @w{"@var{keyseq}": @var{function-name} or @var{macro}}
|
|
@var{keyseq} differs from @var{keyname} above in that strings
|
|
denoting an entire key sequence can be specified, by placing
|
|
the key sequence in double quotes. Some @sc{gnu} Emacs style key
|
|
escapes can be used, as in the following example, but the
|
|
special character names are not recognized.
|
|
|
|
@example
|
|
"\C-u": universal-argument
|
|
"\C-x\C-r": re-read-init-file
|
|
"\e[11~": "Function Key 1"
|
|
@end example
|
|
|
|
In the above example, @kbd{C-u} is again bound to the function
|
|
@code{universal-argument} (just as it was in the first example),
|
|
@samp{@kbd{C-x} @kbd{C-r}} is bound to the function @code{re-read-init-file},
|
|
and @samp{@key{ESC} @key{[} @key{1} @key{1} @key{~}} is bound to insert
|
|
the text @samp{Function Key 1}.
|
|
|
|
@end table
|
|
|
|
The following @sc{gnu} Emacs style escape sequences are available when
|
|
specifying key sequences:
|
|
|
|
@table @code
|
|
@item @kbd{\C-}
|
|
control prefix
|
|
@item @kbd{\M-}
|
|
meta prefix
|
|
@item @kbd{\e}
|
|
an escape character
|
|
@item @kbd{\\}
|
|
backslash
|
|
@item @kbd{\"}
|
|
@key{"}, a double quotation mark
|
|
@item @kbd{\'}
|
|
@key{'}, a single quote or apostrophe
|
|
@end table
|
|
|
|
In addition to the @sc{gnu} Emacs style escape sequences, a second
|
|
set of backslash escapes is available:
|
|
|
|
@table @code
|
|
@item \a
|
|
alert (bell)
|
|
@item \b
|
|
backspace
|
|
@item \d
|
|
delete
|
|
@item \f
|
|
form feed
|
|
@item \n
|
|
newline
|
|
@item \r
|
|
carriage return
|
|
@item \t
|
|
horizontal tab
|
|
@item \v
|
|
vertical tab
|
|
@item \@var{nnn}
|
|
the eight-bit character whose value is the octal value @var{nnn}
|
|
(one to three digits)
|
|
@item \x@var{HH}
|
|
the eight-bit character whose value is the hexadecimal value @var{HH}
|
|
(one or two hex digits)
|
|
@end table
|
|
|
|
When entering the text of a macro, single or double quotes must
|
|
be used to indicate a macro definition.
|
|
Unquoted text is assumed to be a function name.
|
|
In the macro body, the backslash escapes described above are expanded.
|
|
Backslash will quote any other character in the macro text,
|
|
including @samp{"} and @samp{'}.
|
|
For example, the following binding will make @samp{@kbd{C-x} \}
|
|
insert a single @samp{\} into the line:
|
|
@example
|
|
"\C-x\\": "\\"
|
|
@end example
|
|
|
|
@end table
|
|
|
|
@node Conditional Init Constructs
|
|
@subsection Conditional Init Constructs
|
|
|
|
Readline implements a facility similar in spirit to the conditional
|
|
compilation features of the C preprocessor which allows key
|
|
bindings and variable settings to be performed as the result
|
|
of tests. There are four parser directives used.
|
|
|
|
@table @code
|
|
@item $if
|
|
The @code{$if} construct allows bindings to be made based on the
|
|
editing mode, the terminal being used, or the application using
|
|
Readline. The text of the test extends to the end of the line;
|
|
no characters are required to isolate it.
|
|
|
|
@table @code
|
|
@item mode
|
|
The @code{mode=} form of the @code{$if} directive is used to test
|
|
whether Readline is in @code{emacs} or @code{vi} mode.
|
|
This may be used in conjunction
|
|
with the @samp{set keymap} command, for instance, to set bindings in
|
|
the @code{emacs-standard} and @code{emacs-ctlx} keymaps only if
|
|
Readline is starting out in @code{emacs} mode.
|
|
|
|
@item term
|
|
The @code{term=} form may be used to include terminal-specific
|
|
key bindings, perhaps to bind the key sequences output by the
|
|
terminal's function keys. The word on the right side of the
|
|
@samp{=} is tested against both the full name of the terminal and
|
|
the portion of the terminal name before the first @samp{-}. This
|
|
allows @code{sun} to match both @code{sun} and @code{sun-cmd},
|
|
for instance.
|
|
|
|
@item application
|
|
The @var{application} construct is used to include
|
|
application-specific settings. Each program using the Readline
|
|
library sets the @var{application name}, and you can test for
|
|
a particular value.
|
|
This could be used to bind key sequences to functions useful for
|
|
a specific program. For instance, the following command adds a
|
|
key sequence that quotes the current or previous word in Bash:
|
|
@example
|
|
$if Bash
|
|
# Quote the current or previous word
|
|
"\C-xq": "\eb\"\ef\""
|
|
$endif
|
|
@end example
|
|
@end table
|
|
|
|
@item $endif
|
|
This command, as seen in the previous example, terminates an
|
|
@code{$if} command.
|
|
|
|
@item $else
|
|
Commands in this branch of the @code{$if} directive are executed if
|
|
the test fails.
|
|
|
|
@item $include
|
|
This directive takes a single filename as an argument and reads commands
|
|
and bindings from that file.
|
|
For example, the following directive reads from @file{/etc/inputrc}:
|
|
@example
|
|
$include /etc/inputrc
|
|
@end example
|
|
@end table
|
|
|
|
@node Sample Init File
|
|
@subsection Sample Init File
|
|
|
|
Here is an example of an @var{inputrc} file. This illustrates key
|
|
binding, variable assignment, and conditional syntax.
|
|
|
|
@example
|
|
@page
|
|
# This file controls the behaviour of line input editing for
|
|
# programs that use the GNU Readline library. Existing
|
|
# programs include FTP, Bash, and GDB.
|
|
#
|
|
# You can re-read the inputrc file with C-x C-r.
|
|
# Lines beginning with '#' are comments.
|
|
#
|
|
# First, include any systemwide bindings and variable
|
|
# assignments from /etc/Inputrc
|
|
$include /etc/Inputrc
|
|
|
|
#
|
|
# Set various bindings for emacs mode.
|
|
|
|
set editing-mode emacs
|
|
|
|
$if mode=emacs
|
|
|
|
Meta-Control-h: backward-kill-word Text after the function name is ignored
|
|
|
|
#
|
|
# Arrow keys in keypad mode
|
|
#
|
|
#"\M-OD": backward-char
|
|
#"\M-OC": forward-char
|
|
#"\M-OA": previous-history
|
|
#"\M-OB": next-history
|
|
#
|
|
# Arrow keys in ANSI mode
|
|
#
|
|
"\M-[D": backward-char
|
|
"\M-[C": forward-char
|
|
"\M-[A": previous-history
|
|
"\M-[B": next-history
|
|
#
|
|
# Arrow keys in 8 bit keypad mode
|
|
#
|
|
#"\M-\C-OD": backward-char
|
|
#"\M-\C-OC": forward-char
|
|
#"\M-\C-OA": previous-history
|
|
#"\M-\C-OB": next-history
|
|
#
|
|
# Arrow keys in 8 bit ANSI mode
|
|
#
|
|
#"\M-\C-[D": backward-char
|
|
#"\M-\C-[C": forward-char
|
|
#"\M-\C-[A": previous-history
|
|
#"\M-\C-[B": next-history
|
|
|
|
C-q: quoted-insert
|
|
|
|
$endif
|
|
|
|
# An old-style binding. This happens to be the default.
|
|
TAB: complete
|
|
|
|
# Macros that are convenient for shell interaction
|
|
$if Bash
|
|
# edit the path
|
|
"\C-xp": "PATH=$@{PATH@}\e\C-e\C-a\ef\C-f"
|
|
# prepare to type a quoted word --
|
|
# insert open and close double quotes
|
|
# and move to just after the open quote
|
|
"\C-x\"": "\"\"\C-b"
|
|
# insert a backslash (testing backslash escapes
|
|
# in sequences and macros)
|
|
"\C-x\\": "\\"
|
|
# Quote the current or previous word
|
|
"\C-xq": "\eb\"\ef\""
|
|
# Add a binding to refresh the line, which is unbound
|
|
"\C-xr": redraw-current-line
|
|
# Edit variable on current line.
|
|
"\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y="
|
|
$endif
|
|
|
|
# use a visible bell if one is available
|
|
set bell-style visible
|
|
|
|
# don't strip characters to 7 bits when reading
|
|
set input-meta on
|
|
|
|
# allow iso-latin1 characters to be inserted rather
|
|
# than converted to prefix-meta sequences
|
|
set convert-meta off
|
|
|
|
# display characters with the eighth bit set directly
|
|
# rather than as meta-prefixed characters
|
|
set output-meta on
|
|
|
|
# if there are more than 150 possible completions for
|
|
# a word, ask the user if he wants to see all of them
|
|
set completion-query-items 150
|
|
|
|
# For FTP
|
|
$if Ftp
|
|
"\C-xg": "get \M-?"
|
|
"\C-xt": "put \M-?"
|
|
"\M-.": yank-last-arg
|
|
$endif
|
|
@end example
|
|
|
|
@node Bindable Readline Commands
|
|
@section Bindable Readline Commands
|
|
|
|
@menu
|
|
* Commands For Moving:: Moving about the line.
|
|
* Commands For History:: Getting at previous lines.
|
|
* Commands For Text:: Commands for changing text.
|
|
* Commands For Killing:: Commands for killing and yanking.
|
|
* Numeric Arguments:: Specifying numeric arguments, repeat counts.
|
|
* Commands For Completion:: Getting Readline to do the typing for you.
|
|
* Keyboard Macros:: Saving and re-executing typed characters
|
|
* Miscellaneous Commands:: Other miscellaneous commands.
|
|
@end menu
|
|
|
|
This section describes Readline commands that may be bound to key
|
|
sequences.
|
|
@ifset BashFeatures
|
|
You can list your key bindings by executing
|
|
@w{@code{bind -P}} or, for a more terse format, suitable for an
|
|
@var{inputrc} file, @w{@code{bind -p}}. (@xref{Bash Builtins}.)
|
|
@end ifset
|
|
Command names without an accompanying key sequence are unbound by default.
|
|
|
|
In the following descriptions, @dfn{point} refers to the current cursor
|
|
position, and @dfn{mark} refers to a cursor position saved by the
|
|
@code{set-mark} command.
|
|
The text between the point and mark is referred to as the @dfn{region}.
|
|
|
|
@node Commands For Moving
|
|
@subsection Commands For Moving
|
|
@ftable @code
|
|
@item beginning-of-line (C-a)
|
|
Move to the start of the current line.
|
|
|
|
@item end-of-line (C-e)
|
|
Move to the end of the line.
|
|
|
|
@item forward-char (C-f)
|
|
Move forward a character.
|
|
|
|
@item backward-char (C-b)
|
|
Move back a character.
|
|
|
|
@item forward-word (M-f)
|
|
Move forward to the end of the next word.
|
|
Words are composed of letters and digits.
|
|
|
|
@item backward-word (M-b)
|
|
Move back to the start of the current or previous word.
|
|
Words are composed of letters and digits.
|
|
|
|
@ifset BashFeatures
|
|
@item shell-forward-word ()
|
|
Move forward to the end of the next word.
|
|
Words are delimited by non-quoted shell metacharacters.
|
|
|
|
@item shell-backward-word ()
|
|
Move back to the start of the current or previous word.
|
|
Words are delimited by non-quoted shell metacharacters.
|
|
@end ifset
|
|
|
|
@item clear-screen (C-l)
|
|
Clear the screen and redraw the current line,
|
|
leaving the current line at the top of the screen.
|
|
|
|
@item redraw-current-line ()
|
|
Refresh the current line. By default, this is unbound.
|
|
|
|
@end ftable
|
|
|
|
@node Commands For History
|
|
@subsection Commands For Manipulating The History
|
|
|
|
@ftable @code
|
|
@item accept-line (Newline or Return)
|
|
@ifset BashFeatures
|
|
Accept the line regardless of where the cursor is.
|
|
If this line is
|
|
non-empty, add it to the history list according to the setting of
|
|
the @env{HISTCONTROL} and @env{HISTIGNORE} variables.
|
|
If this line is a modified history line, then restore the history line
|
|
to its original state.
|
|
@end ifset
|
|
@ifclear BashFeatures
|
|
Accept the line regardless of where the cursor is.
|
|
If this line is
|
|
non-empty, it may be added to the history list for future recall with
|
|
@code{add_history()}.
|
|
If this line is a modified history line, the history line is restored
|
|
to its original state.
|
|
@end ifclear
|
|
|
|
@item previous-history (C-p)
|
|
Move `back' through the history list, fetching the previous command.
|
|
|
|
@item next-history (C-n)
|
|
Move `forward' through the history list, fetching the next command.
|
|
|
|
@item beginning-of-history (M-<)
|
|
Move to the first line in the history.
|
|
|
|
@item end-of-history (M->)
|
|
Move to the end of the input history, i.e., the line currently
|
|
being entered.
|
|
|
|
@item reverse-search-history (C-r)
|
|
Search backward starting at the current line and moving `up' through
|
|
the history as necessary. This is an incremental search.
|
|
|
|
@item forward-search-history (C-s)
|
|
Search forward starting at the current line and moving `down' through
|
|
the the history as necessary. This is an incremental search.
|
|
|
|
@item non-incremental-reverse-search-history (M-p)
|
|
Search backward starting at the current line and moving `up'
|
|
through the history as necessary using a non-incremental search
|
|
for a string supplied by the user.
|
|
|
|
@item non-incremental-forward-search-history (M-n)
|
|
Search forward starting at the current line and moving `down'
|
|
through the the history as necessary using a non-incremental search
|
|
for a string supplied by the user.
|
|
|
|
@item history-search-forward ()
|
|
Search forward through the history for the string of characters
|
|
between the start of the current line and the point.
|
|
This is a non-incremental search.
|
|
By default, this command is unbound.
|
|
|
|
@item history-search-backward ()
|
|
Search backward through the history for the string of characters
|
|
between the start of the current line and the point. This
|
|
is a non-incremental search. By default, this command is unbound.
|
|
|
|
@item yank-nth-arg (M-C-y)
|
|
Insert the first argument to the previous command (usually
|
|
the second word on the previous line) at point.
|
|
With an argument @var{n},
|
|
insert the @var{n}th word from the previous command (the words
|
|
in the previous command begin with word 0). A negative argument
|
|
inserts the @var{n}th word from the end of the previous command.
|
|
Once the argument @var{n} is computed, the argument is extracted
|
|
as if the @samp{!@var{n}} history expansion had been specified.
|
|
|
|
@item yank-last-arg (M-. or M-_)
|
|
Insert last argument to the previous command (the last word of the
|
|
previous history entry).
|
|
With a numeric argument, behave exactly like @code{yank-nth-arg}.
|
|
Successive calls to @code{yank-last-arg} move back through the history
|
|
list, inserting the last word (or the word specified by the argument to
|
|
the first call) of each line in turn.
|
|
Any numeric argument supplied to these successive calls determines
|
|
the direction to move through the history. A negative argument switches
|
|
the direction through the history (back or forward).
|
|
The history expansion facilities are used to extract the last argument,
|
|
as if the @samp{!$} history expansion had been specified.
|
|
|
|
@end ftable
|
|
|
|
@node Commands For Text
|
|
@subsection Commands For Changing Text
|
|
|
|
@ftable @code
|
|
@item delete-char (C-d)
|
|
Delete the character at point. If point is at the
|
|
beginning of the line, there are no characters in the line, and
|
|
the last character typed was not bound to @code{delete-char}, then
|
|
return @sc{eof}.
|
|
|
|
@item backward-delete-char (Rubout)
|
|
Delete the character behind the cursor. A numeric argument means
|
|
to kill the characters instead of deleting them.
|
|
|
|
@item forward-backward-delete-char ()
|
|
Delete the character under the cursor, unless the cursor is at the
|
|
end of the line, in which case the character behind the cursor is
|
|
deleted. By default, this is not bound to a key.
|
|
|
|
@item quoted-insert (C-q or C-v)
|
|
Add the next character typed to the line verbatim. This is
|
|
how to insert key sequences like @kbd{C-q}, for example.
|
|
|
|
@ifclear BashFeatures
|
|
@item tab-insert (M-@key{TAB})
|
|
Insert a tab character.
|
|
@end ifclear
|
|
|
|
@item self-insert (a, b, A, 1, !, @dots{})
|
|
Insert yourself.
|
|
|
|
@item transpose-chars (C-t)
|
|
Drag the character before the cursor forward over
|
|
the character at the cursor, moving the
|
|
cursor forward as well. If the insertion point
|
|
is at the end of the line, then this
|
|
transposes the last two characters of the line.
|
|
Negative arguments have no effect.
|
|
|
|
@item transpose-words (M-t)
|
|
Drag the word before point past the word after point,
|
|
moving point past that word as well.
|
|
If the insertion point is at the end of the line, this transposes
|
|
the last two words on the line.
|
|
|
|
@item upcase-word (M-u)
|
|
Uppercase the current (or following) word. With a negative argument,
|
|
uppercase the previous word, but do not move the cursor.
|
|
|
|
@item downcase-word (M-l)
|
|
Lowercase the current (or following) word. With a negative argument,
|
|
lowercase the previous word, but do not move the cursor.
|
|
|
|
@item capitalize-word (M-c)
|
|
Capitalize the current (or following) word. With a negative argument,
|
|
capitalize the previous word, but do not move the cursor.
|
|
|
|
@item overwrite-mode ()
|
|
Toggle overwrite mode. With an explicit positive numeric argument,
|
|
switches to overwrite mode. With an explicit non-positive numeric
|
|
argument, switches to insert mode. This command affects only
|
|
@code{emacs} mode; @code{vi} mode does overwrite differently.
|
|
Each call to @code{readline()} starts in insert mode.
|
|
|
|
In overwrite mode, characters bound to @code{self-insert} replace
|
|
the text at point rather than pushing the text to the right.
|
|
Characters bound to @code{backward-delete-char} replace the character
|
|
before point with a space.
|
|
|
|
By default, this command is unbound.
|
|
|
|
@end ftable
|
|
|
|
@node Commands For Killing
|
|
@subsection Killing And Yanking
|
|
|
|
@ftable @code
|
|
|
|
@item kill-line (C-k)
|
|
Kill the text from point to the end of the line.
|
|
|
|
@item backward-kill-line (C-x Rubout)
|
|
Kill backward to the beginning of the line.
|
|
|
|
@item unix-line-discard (C-u)
|
|
Kill backward from the cursor to the beginning of the current line.
|
|
|
|
@item kill-whole-line ()
|
|
Kill all characters on the current line, no matter where point is.
|
|
By default, this is unbound.
|
|
|
|
@item kill-word (M-d)
|
|
Kill from point to the end of the current word, or if between
|
|
words, to the end of the next word.
|
|
Word boundaries are the same as @code{forward-word}.
|
|
|
|
@item backward-kill-word (M-@key{DEL})
|
|
Kill the word behind point.
|
|
Word boundaries are the same as @code{backward-word}.
|
|
|
|
@ifset BashFeatures
|
|
@item shell-kill-word ()
|
|
Kill from point to the end of the current word, or if between
|
|
words, to the end of the next word.
|
|
Word boundaries are the same as @code{shell-forward-word}.
|
|
|
|
@item shell-backward-kill-word ()
|
|
Kill the word behind point.
|
|
Word boundaries are the same as @code{shell-backward-word}.
|
|
@end ifset
|
|
|
|
@item unix-word-rubout (C-w)
|
|
Kill the word behind point, using white space as a word boundary.
|
|
The killed text is saved on the kill-ring.
|
|
|
|
@item unix-filename-rubout ()
|
|
Kill the word behind point, using white space and the slash character
|
|
as the word boundaries.
|
|
The killed text is saved on the kill-ring.
|
|
|
|
@item delete-horizontal-space ()
|
|
Delete all spaces and tabs around point. By default, this is unbound.
|
|
|
|
@item kill-region ()
|
|
Kill the text in the current region.
|
|
By default, this command is unbound.
|
|
|
|
@item copy-region-as-kill ()
|
|
Copy the text in the region to the kill buffer, so it can be yanked
|
|
right away. By default, this command is unbound.
|
|
|
|
@item copy-backward-word ()
|
|
Copy the word before point to the kill buffer.
|
|
The word boundaries are the same as @code{backward-word}.
|
|
By default, this command is unbound.
|
|
|
|
@item copy-forward-word ()
|
|
Copy the word following point to the kill buffer.
|
|
The word boundaries are the same as @code{forward-word}.
|
|
By default, this command is unbound.
|
|
|
|
@item yank (C-y)
|
|
Yank the top of the kill ring into the buffer at point.
|
|
|
|
@item yank-pop (M-y)
|
|
Rotate the kill-ring, and yank the new top. You can only do this if
|
|
the prior command is @code{yank} or @code{yank-pop}.
|
|
@end ftable
|
|
|
|
@node Numeric Arguments
|
|
@subsection Specifying Numeric Arguments
|
|
@ftable @code
|
|
|
|
@item digit-argument (@kbd{M-0}, @kbd{M-1}, @dots{} @kbd{M--})
|
|
Add this digit to the argument already accumulating, or start a new
|
|
argument. @kbd{M--} starts a negative argument.
|
|
|
|
@item universal-argument ()
|
|
This is another way to specify an argument.
|
|
If this command is followed by one or more digits, optionally with a
|
|
leading minus sign, those digits define the argument.
|
|
If the command is followed by digits, executing @code{universal-argument}
|
|
again ends the numeric argument, but is otherwise ignored.
|
|
As a special case, if this command is immediately followed by a
|
|
character that is neither a digit or minus sign, the argument count
|
|
for the next command is multiplied by four.
|
|
The argument count is initially one, so executing this function the
|
|
first time makes the argument count four, a second time makes the
|
|
argument count sixteen, and so on.
|
|
By default, this is not bound to a key.
|
|
@end ftable
|
|
|
|
@node Commands For Completion
|
|
@subsection Letting Readline Type For You
|
|
|
|
@ftable @code
|
|
@item complete (@key{TAB})
|
|
Attempt to perform completion on the text before point.
|
|
The actual completion performed is application-specific.
|
|
@ifset BashFeatures
|
|
Bash attempts completion treating the text as a variable (if the
|
|
text begins with @samp{$}), username (if the text begins with
|
|
@samp{~}), hostname (if the text begins with @samp{@@}), or
|
|
command (including aliases and functions) in turn. If none
|
|
of these produces a match, filename completion is attempted.
|
|
@end ifset
|
|
@ifclear BashFeatures
|
|
The default is filename completion.
|
|
@end ifclear
|
|
|
|
@item possible-completions (M-?)
|
|
List the possible completions of the text before point.
|
|
When displaying completions, Readline sets the number of columns used
|
|
for display to the value of @code{completion-display-width}, the value of
|
|
the environment variable @env{COLUMNS}, or the screen width, in that order.
|
|
|
|
@item insert-completions (M-*)
|
|
Insert all completions of the text before point that would have
|
|
been generated by @code{possible-completions}.
|
|
|
|
@item menu-complete ()
|
|
Similar to @code{complete}, but replaces the word to be completed
|
|
with a single match from the list of possible completions.
|
|
Repeated execution of @code{menu-complete} steps through the list
|
|
of possible completions, inserting each match in turn.
|
|
At the end of the list of completions, the bell is rung
|
|
(subject to the setting of @code{bell-style})
|
|
and the original text is restored.
|
|
An argument of @var{n} moves @var{n} positions forward in the list
|
|
of matches; a negative argument may be used to move backward
|
|
through the list.
|
|
This command is intended to be bound to @key{TAB}, but is unbound
|
|
by default.
|
|
|
|
@item menu-complete-backward ()
|
|
Identical to @code{menu-complete}, but moves backward through the list
|
|
of possible completions, as if @code{menu-complete} had been given a
|
|
negative argument.
|
|
|
|
@item delete-char-or-list ()
|
|
Deletes the character under the cursor if not at the beginning or
|
|
end of the line (like @code{delete-char}).
|
|
If at the end of the line, behaves identically to
|
|
@code{possible-completions}.
|
|
This command is unbound by default.
|
|
|
|
@ifset BashFeatures
|
|
@item complete-filename (M-/)
|
|
Attempt filename completion on the text before point.
|
|
|
|
@item possible-filename-completions (C-x /)
|
|
List the possible completions of the text before point,
|
|
treating it as a filename.
|
|
|
|
@item complete-username (M-~)
|
|
Attempt completion on the text before point, treating
|
|
it as a username.
|
|
|
|
@item possible-username-completions (C-x ~)
|
|
List the possible completions of the text before point,
|
|
treating it as a username.
|
|
|
|
@item complete-variable (M-$)
|
|
Attempt completion on the text before point, treating
|
|
it as a shell variable.
|
|
|
|
@item possible-variable-completions (C-x $)
|
|
List the possible completions of the text before point,
|
|
treating it as a shell variable.
|
|
|
|
@item complete-hostname (M-@@)
|
|
Attempt completion on the text before point, treating
|
|
it as a hostname.
|
|
|
|
@item possible-hostname-completions (C-x @@)
|
|
List the possible completions of the text before point,
|
|
treating it as a hostname.
|
|
|
|
@item complete-command (M-!)
|
|
Attempt completion on the text before point, treating
|
|
it as a command name. Command completion attempts to
|
|
match the text against aliases, reserved words, shell
|
|
functions, shell builtins, and finally executable filenames,
|
|
in that order.
|
|
|
|
@item possible-command-completions (C-x !)
|
|
List the possible completions of the text before point,
|
|
treating it as a command name.
|
|
|
|
@item dynamic-complete-history (M-@key{TAB})
|
|
Attempt completion on the text before point, comparing
|
|
the text against lines from the history list for possible
|
|
completion matches.
|
|
|
|
@item dabbrev-expand ()
|
|
Attempt menu completion on the text before point, comparing
|
|
the text against lines from the history list for possible
|
|
completion matches.
|
|
|
|
@item complete-into-braces (M-@{)
|
|
Perform filename completion and insert the list of possible completions
|
|
enclosed within braces so the list is available to the shell
|
|
(@pxref{Brace Expansion}).
|
|
|
|
@end ifset
|
|
@end ftable
|
|
|
|
@node Keyboard Macros
|
|
@subsection Keyboard Macros
|
|
@ftable @code
|
|
|
|
@item start-kbd-macro (C-x ()
|
|
Begin saving the characters typed into the current keyboard macro.
|
|
|
|
@item end-kbd-macro (C-x ))
|
|
Stop saving the characters typed into the current keyboard macro
|
|
and save the definition.
|
|
|
|
@item call-last-kbd-macro (C-x e)
|
|
Re-execute the last keyboard macro defined, by making the characters
|
|
in the macro appear as if typed at the keyboard.
|
|
|
|
@end ftable
|
|
|
|
@node Miscellaneous Commands
|
|
@subsection Some Miscellaneous Commands
|
|
@ftable @code
|
|
|
|
@item re-read-init-file (C-x C-r)
|
|
Read in the contents of the @var{inputrc} file, and incorporate
|
|
any bindings or variable assignments found there.
|
|
|
|
@item abort (C-g)
|
|
Abort the current editing command and
|
|
ring the terminal's bell (subject to the setting of
|
|
@code{bell-style}).
|
|
|
|
@item do-uppercase-version (M-a, M-b, M-@var{x}, @dots{})
|
|
If the metafied character @var{x} is lowercase, run the command
|
|
that is bound to the corresponding uppercase character.
|
|
|
|
@item prefix-meta (@key{ESC})
|
|
Metafy the next character typed. This is for keyboards
|
|
without a meta key. Typing @samp{@key{ESC} f} is equivalent to typing
|
|
@kbd{M-f}.
|
|
|
|
@item undo (C-_ or C-x C-u)
|
|
Incremental undo, separately remembered for each line.
|
|
|
|
@item revert-line (M-r)
|
|
Undo all changes made to this line. This is like executing the @code{undo}
|
|
command enough times to get back to the beginning.
|
|
|
|
@ifset BashFeatures
|
|
@item tilde-expand (M-&)
|
|
@end ifset
|
|
@ifclear BashFeatures
|
|
@item tilde-expand (M-~)
|
|
@end ifclear
|
|
Perform tilde expansion on the current word.
|
|
|
|
@item set-mark (C-@@)
|
|
Set the mark to the point. If a
|
|
numeric argument is supplied, the mark is set to that position.
|
|
|
|
@item exchange-point-and-mark (C-x C-x)
|
|
Swap the point with the mark. The current cursor position is set to
|
|
the saved position, and the old cursor position is saved as the mark.
|
|
|
|
@item character-search (C-])
|
|
A character is read and point is moved to the next occurrence of that
|
|
character. A negative count searches for previous occurrences.
|
|
|
|
@item character-search-backward (M-C-])
|
|
A character is read and point is moved to the previous occurrence
|
|
of that character. A negative count searches for subsequent
|
|
occurrences.
|
|
|
|
@item skip-csi-sequence ()
|
|
Read enough characters to consume a multi-key sequence such as those
|
|
defined for keys like Home and End. Such sequences begin with a
|
|
Control Sequence Indicator (CSI), usually ESC-[. If this sequence is
|
|
bound to "\e[", keys producing such sequences will have no effect
|
|
unless explicitly bound to a readline command, instead of inserting
|
|
stray characters into the editing buffer. This is unbound by default,
|
|
but usually bound to ESC-[.
|
|
|
|
@item insert-comment (M-#)
|
|
Without a numeric argument, the value of the @code{comment-begin}
|
|
variable is inserted at the beginning of the current line.
|
|
If a numeric argument is supplied, this command acts as a toggle: if
|
|
the characters at the beginning of the line do not match the value
|
|
of @code{comment-begin}, the value is inserted, otherwise
|
|
the characters in @code{comment-begin} are deleted from the beginning of
|
|
the line.
|
|
In either case, the line is accepted as if a newline had been typed.
|
|
@ifset BashFeatures
|
|
The default value of @code{comment-begin} causes this command
|
|
to make the current line a shell comment.
|
|
If a numeric argument causes the comment character to be removed, the line
|
|
will be executed by the shell.
|
|
@end ifset
|
|
|
|
@item dump-functions ()
|
|
Print all of the functions and their key bindings to the
|
|
Readline output stream. If a numeric argument is supplied,
|
|
the output is formatted in such a way that it can be made part
|
|
of an @var{inputrc} file. This command is unbound by default.
|
|
|
|
@item dump-variables ()
|
|
Print all of the settable variables and their values to the
|
|
Readline output stream. If a numeric argument is supplied,
|
|
the output is formatted in such a way that it can be made part
|
|
of an @var{inputrc} file. This command is unbound by default.
|
|
|
|
@item dump-macros ()
|
|
Print all of the Readline key sequences bound to macros and the
|
|
strings they output. If a numeric argument is supplied,
|
|
the output is formatted in such a way that it can be made part
|
|
of an @var{inputrc} file. This command is unbound by default.
|
|
|
|
@ifset BashFeatures
|
|
@item glob-complete-word (M-g)
|
|
The word before point is treated as a pattern for pathname expansion,
|
|
with an asterisk implicitly appended. This pattern is used to
|
|
generate a list of matching file names for possible completions.
|
|
|
|
@item glob-expand-word (C-x *)
|
|
The word before point is treated as a pattern for pathname expansion,
|
|
and the list of matching file names is inserted, replacing the word.
|
|
If a numeric argument is supplied, a @samp{*} is appended before
|
|
pathname expansion.
|
|
|
|
@item glob-list-expansions (C-x g)
|
|
The list of expansions that would have been generated by
|
|
@code{glob-expand-word} is displayed, and the line is redrawn.
|
|
If a numeric argument is supplied, a @samp{*} is appended before
|
|
pathname expansion.
|
|
|
|
@item display-shell-version (C-x C-v)
|
|
Display version information about the current instance of Bash.
|
|
|
|
@item shell-expand-line (M-C-e)
|
|
Expand the line as the shell does.
|
|
This performs alias and history expansion as well as all of the shell
|
|
word expansions (@pxref{Shell Expansions}).
|
|
|
|
@item history-expand-line (M-^)
|
|
Perform history expansion on the current line.
|
|
|
|
@item magic-space ()
|
|
Perform history expansion on the current line and insert a space
|
|
(@pxref{History Interaction}).
|
|
|
|
@item alias-expand-line ()
|
|
Perform alias expansion on the current line (@pxref{Aliases}).
|
|
|
|
@item history-and-alias-expand-line ()
|
|
Perform history and alias expansion on the current line.
|
|
|
|
@item insert-last-argument (M-. or M-_)
|
|
A synonym for @code{yank-last-arg}.
|
|
|
|
@item operate-and-get-next (C-o)
|
|
Accept the current line for execution and fetch the next line
|
|
relative to the current line from the history for editing. Any
|
|
argument is ignored.
|
|
|
|
@item edit-and-execute-command (C-xC-e)
|
|
Invoke an editor on the current command line, and execute the result as shell
|
|
commands.
|
|
Bash attempts to invoke
|
|
@code{$VISUAL}, @code{$EDITOR}, and @code{emacs}
|
|
as the editor, in that order.
|
|
|
|
@end ifset
|
|
|
|
@ifclear BashFeatures
|
|
@item emacs-editing-mode (C-e)
|
|
When in @code{vi} command mode, this causes a switch to @code{emacs}
|
|
editing mode.
|
|
|
|
@item vi-editing-mode (M-C-j)
|
|
When in @code{emacs} editing mode, this causes a switch to @code{vi}
|
|
editing mode.
|
|
|
|
@end ifclear
|
|
|
|
@end ftable
|
|
|
|
@node Readline vi Mode
|
|
@section Readline vi Mode
|
|
|
|
While the Readline library does not have a full set of @code{vi}
|
|
editing functions, it does contain enough to allow simple editing
|
|
of the line. The Readline @code{vi} mode behaves as specified in
|
|
the @sc{posix} standard.
|
|
|
|
@ifset BashFeatures
|
|
In order to switch interactively between @code{emacs} and @code{vi}
|
|
editing modes, use the @samp{set -o emacs} and @samp{set -o vi}
|
|
commands (@pxref{The Set Builtin}).
|
|
@end ifset
|
|
@ifclear BashFeatures
|
|
In order to switch interactively between @code{emacs} and @code{vi}
|
|
editing modes, use the command @kbd{M-C-j} (bound to emacs-editing-mode
|
|
when in @code{vi} mode and to vi-editing-mode in @code{emacs} mode).
|
|
@end ifclear
|
|
The Readline default is @code{emacs} mode.
|
|
|
|
When you enter a line in @code{vi} mode, you are already placed in
|
|
`insertion' mode, as if you had typed an @samp{i}. Pressing @key{ESC}
|
|
switches you into `command' mode, where you can edit the text of the
|
|
line with the standard @code{vi} movement keys, move to previous
|
|
history lines with @samp{k} and subsequent lines with @samp{j}, and
|
|
so forth.
|
|
|
|
@ifset BashFeatures
|
|
@node Programmable Completion
|
|
@section Programmable Completion
|
|
@cindex programmable completion
|
|
|
|
When word completion is attempted for an argument to a command for
|
|
which a completion specification (a @var{compspec}) has been defined
|
|
using the @code{complete} builtin (@pxref{Programmable Completion Builtins}),
|
|
the programmable completion facilities are invoked.
|
|
|
|
First, the command name is identified.
|
|
If a compspec has been defined for that command, the
|
|
compspec is used to generate the list of possible completions for the word.
|
|
If the command word is the empty string (completion attempted at the
|
|
beginning of an empty line), any compspec defined with
|
|
the @option{-E} option to @code{complete} is used.
|
|
If the command word is a full pathname, a compspec for the full
|
|
pathname is searched for first.
|
|
If no compspec is found for the full pathname, an attempt is made to
|
|
find a compspec for the portion following the final slash.
|
|
If those searches do not result in a compspec, any compspec defined with
|
|
the @option{-D} option to @code{complete} is used as the default.
|
|
|
|
Once a compspec has been found, it is used to generate the list of
|
|
matching words.
|
|
If a compspec is not found, the default Bash completion
|
|
described above (@pxref{Commands For Completion}) is performed.
|
|
|
|
First, the actions specified by the compspec are used.
|
|
Only matches which are prefixed by the word being completed are
|
|
returned.
|
|
When the @option{-f} or @option{-d} option is used for filename or
|
|
directory name completion, the shell variable @env{FIGNORE} is
|
|
used to filter the matches.
|
|
@xref{Bash Variables}, for a description of @env{FIGNORE}.
|
|
|
|
Any completions specified by a filename expansion pattern to the
|
|
@option{-G} option are generated next.
|
|
The words generated by the pattern need not match the word being completed.
|
|
The @env{GLOBIGNORE} shell variable is not used to filter the matches,
|
|
but the @env{FIGNORE} shell variable is used.
|
|
|
|
Next, the string specified as the argument to the @option{-W} option
|
|
is considered.
|
|
The string is first split using the characters in the @env{IFS}
|
|
special variable as delimiters.
|
|
Shell quoting is honored.
|
|
Each word is then expanded using
|
|
brace expansion, tilde expansion, parameter and variable expansion,
|
|
command substitution, and arithmetic expansion,
|
|
as described above (@pxref{Shell Expansions}).
|
|
The results are split using the rules described above
|
|
(@pxref{Word Splitting}).
|
|
The results of the expansion are prefix-matched against the word being
|
|
completed, and the matching words become the possible completions.
|
|
|
|
After these matches have been generated, any shell function or command
|
|
specified with the @option{-F} and @option{-C} options is invoked.
|
|
When the command or function is invoked, the @env{COMP_LINE},
|
|
@env{COMP_POINT}, @env{COMP_KEY}, and @env{COMP_TYPE} variables are
|
|
assigned values as described above (@pxref{Bash Variables}).
|
|
If a shell function is being invoked, the @env{COMP_WORDS} and
|
|
@env{COMP_CWORD} variables are also set.
|
|
When the function or command is invoked, the first argument is the
|
|
name of the command whose arguments are being completed, the
|
|
second argument is the word being completed, and the third argument
|
|
is the word preceding the word being completed on the current command line.
|
|
No filtering of the generated completions against the word being completed
|
|
is performed; the function or command has complete freedom in generating
|
|
the matches.
|
|
|
|
Any function specified with @option{-F} is invoked first.
|
|
The function may use any of the shell facilities, including the
|
|
@code{compgen} and @code{compopt} builtins described below
|
|
(@pxref{Programmable Completion Builtins}), to generate the matches.
|
|
It must put the possible completions in the @env{COMPREPLY} array
|
|
variable.
|
|
|
|
Next, any command specified with the @option{-C} option is invoked
|
|
in an environment equivalent to command substitution.
|
|
It should print a list of completions, one per line, to
|
|
the standard output.
|
|
Backslash may be used to escape a newline, if necessary.
|
|
|
|
After all of the possible completions are generated, any filter
|
|
specified with the @option{-X} option is applied to the list.
|
|
The filter is a pattern as used for pathname expansion; a @samp{&}
|
|
in the pattern is replaced with the text of the word being completed.
|
|
A literal @samp{&} may be escaped with a backslash; the backslash
|
|
is removed before attempting a match.
|
|
Any completion that matches the pattern will be removed from the list.
|
|
A leading @samp{!} negates the pattern; in this case any completion
|
|
not matching the pattern will be removed.
|
|
|
|
Finally, any prefix and suffix specified with the @option{-P} and @option{-S}
|
|
options are added to each member of the completion list, and the result is
|
|
returned to the Readline completion code as the list of possible
|
|
completions.
|
|
|
|
If the previously-applied actions do not generate any matches, and the
|
|
@option{-o dirnames} option was supplied to @code{complete} when the
|
|
compspec was defined, directory name completion is attempted.
|
|
|
|
If the @option{-o plusdirs} option was supplied to @code{complete} when
|
|
the compspec was defined, directory name completion is attempted and any
|
|
matches are added to the results of the other actions.
|
|
|
|
By default, if a compspec is found, whatever it generates is returned to
|
|
the completion code as the full set of possible completions.
|
|
The default Bash completions are not attempted, and the Readline default
|
|
of filename completion is disabled.
|
|
If the @option{-o bashdefault} option was supplied to @code{complete} when
|
|
the compspec was defined, the default Bash completions are attempted
|
|
if the compspec generates no matches.
|
|
If the @option{-o default} option was supplied to @code{complete} when the
|
|
compspec was defined, Readline's default completion will be performed
|
|
if the compspec (and, if attempted, the default Bash completions)
|
|
generate no matches.
|
|
|
|
When a compspec indicates that directory name completion is desired,
|
|
the programmable completion functions force Readline to append a slash
|
|
to completed names which are symbolic links to directories, subject to
|
|
the value of the @var{mark-directories} Readline variable, regardless
|
|
of the setting of the @var{mark-symlinked-directories} Readline variable.
|
|
|
|
There is some support for dynamically modifying completions. This is
|
|
most useful when used in combination with a default completion specified
|
|
with @option{-D}. It's possible for shell functions executed as completion
|
|
handlers to indicate that completion should be retried by returning an
|
|
exit status of 124. If a shell function returns 124, and changes
|
|
the compspec associated with the command on which completion is being
|
|
attempted (supplied as the first argument when the function is executed),
|
|
programmable completion restarts from the beginning, with an
|
|
attempt to find a new compspec for that command. This allows a set of
|
|
completions to be built dynamically as completion is attempted, rather than
|
|
being loaded all at once.
|
|
|
|
For instance, assuming that there is a library of compspecs, each kept in a
|
|
file corresponding to the name of the command, the following default
|
|
completion function would load completions dynamically:
|
|
|
|
@example
|
|
_completion_loader()
|
|
@{
|
|
. "/etc/bash_completion.d/$1.sh" >/dev/null 2>&1 && return 124
|
|
@}
|
|
complete -D -F _completion_loader
|
|
@end example
|
|
|
|
@node Programmable Completion Builtins
|
|
@section Programmable Completion Builtins
|
|
@cindex completion builtins
|
|
|
|
Two builtin commands are available to manipulate the programmable completion
|
|
facilities.
|
|
|
|
@table @code
|
|
@item compgen
|
|
@btindex compgen
|
|
@example
|
|
@code{compgen [@var{option}] [@var{word}]}
|
|
@end example
|
|
|
|
Generate possible completion matches for @var{word} according to
|
|
the @var{option}s, which may be any option accepted by the
|
|
@code{complete}
|
|
builtin with the exception of @option{-p} and @option{-r}, and write
|
|
the matches to the standard output.
|
|
When using the @option{-F} or @option{-C} options, the various shell variables
|
|
set by the programmable completion facilities, while available, will not
|
|
have useful values.
|
|
|
|
The matches will be generated in the same way as if the programmable
|
|
completion code had generated them directly from a completion specification
|
|
with the same flags.
|
|
If @var{word} is specified, only those completions matching @var{word}
|
|
will be displayed.
|
|
|
|
The return value is true unless an invalid option is supplied, or no
|
|
matches were generated.
|
|
|
|
@item complete
|
|
@btindex complete
|
|
@example
|
|
@code{complete [-abcdefgjksuv] [-o @var{comp-option}] [-DE] [-A @var{action}] [-G @var{globpat}] [-W @var{wordlist}]
|
|
[-F @var{function}] [-C @var{command}] [-X @var{filterpat}]
|
|
[-P @var{prefix}] [-S @var{suffix}] @var{name} [@var{name} @dots{}]}
|
|
@code{complete -pr [-DE] [@var{name} @dots{}]}
|
|
@end example
|
|
|
|
Specify how arguments to each @var{name} should be completed.
|
|
If the @option{-p} option is supplied, or if no options are supplied, existing
|
|
completion specifications are printed in a way that allows them to be
|
|
reused as input.
|
|
The @option{-r} option removes a completion specification for
|
|
each @var{name}, or, if no @var{name}s are supplied, all
|
|
completion specifications.
|
|
The @option{-D} option indicates that the remaining options and actions should
|
|
apply to the ``default'' command completion; that is, completion attempted
|
|
on a command for which no completion has previously been defined.
|
|
The @option{-E} option indicates that the remaining options and actions should
|
|
apply to ``empty'' command completion; that is, completion attempted on a
|
|
blank line.
|
|
|
|
The process of applying these completion specifications when word completion
|
|
is attempted is described above (@pxref{Programmable Completion}). The
|
|
@option{-D} option takes precedence over @option{-E}.
|
|
|
|
Other options, if specified, have the following meanings.
|
|
The arguments to the @option{-G}, @option{-W}, and @option{-X} options
|
|
(and, if necessary, the @option{-P} and @option{-S} options)
|
|
should be quoted to protect them from expansion before the
|
|
@code{complete} builtin is invoked.
|
|
|
|
|
|
@table @code
|
|
@item -o @var{comp-option}
|
|
The @var{comp-option} controls several aspects of the compspec's behavior
|
|
beyond the simple generation of completions.
|
|
@var{comp-option} may be one of:
|
|
|
|
@table @code
|
|
|
|
@item bashdefault
|
|
Perform the rest of the default Bash completions if the compspec
|
|
generates no matches.
|
|
|
|
@item default
|
|
Use Readline's default filename completion if the compspec generates
|
|
no matches.
|
|
|
|
@item dirnames
|
|
Perform directory name completion if the compspec generates no matches.
|
|
|
|
@item filenames
|
|
Tell Readline that the compspec generates filenames, so it can perform any
|
|
filename-specific processing (like adding a slash to directory names
|
|
quoting special characters, or suppressing trailing spaces).
|
|
This option is intended to be used with shell functions specified
|
|
with @option{-F}.
|
|
|
|
@item nospace
|
|
Tell Readline not to append a space (the default) to words completed at
|
|
the end of the line.
|
|
|
|
@item plusdirs
|
|
After any matches defined by the compspec are generated,
|
|
directory name completion is attempted and any
|
|
matches are added to the results of the other actions.
|
|
|
|
@end table
|
|
|
|
@item -A @var{action}
|
|
The @var{action} may be one of the following to generate a list of possible
|
|
completions:
|
|
|
|
@table @code
|
|
@item alias
|
|
Alias names. May also be specified as @option{-a}.
|
|
|
|
@item arrayvar
|
|
Array variable names.
|
|
|
|
@item binding
|
|
Readline key binding names (@pxref{Bindable Readline Commands}).
|
|
|
|
@item builtin
|
|
Names of shell builtin commands. May also be specified as @option{-b}.
|
|
|
|
@item command
|
|
Command names. May also be specified as @option{-c}.
|
|
|
|
@item directory
|
|
Directory names. May also be specified as @option{-d}.
|
|
|
|
@item disabled
|
|
Names of disabled shell builtins.
|
|
|
|
@item enabled
|
|
Names of enabled shell builtins.
|
|
|
|
@item export
|
|
Names of exported shell variables. May also be specified as @option{-e}.
|
|
|
|
@item file
|
|
File names. May also be specified as @option{-f}.
|
|
|
|
@item function
|
|
Names of shell functions.
|
|
|
|
@item group
|
|
Group names. May also be specified as @option{-g}.
|
|
|
|
@item helptopic
|
|
Help topics as accepted by the @code{help} builtin (@pxref{Bash Builtins}).
|
|
|
|
@item hostname
|
|
Hostnames, as taken from the file specified by the
|
|
@env{HOSTFILE} shell variable (@pxref{Bash Variables}).
|
|
|
|
@item job
|
|
Job names, if job control is active. May also be specified as @option{-j}.
|
|
|
|
@item keyword
|
|
Shell reserved words. May also be specified as @option{-k}.
|
|
|
|
@item running
|
|
Names of running jobs, if job control is active.
|
|
|
|
@item service
|
|
Service names. May also be specified as @option{-s}.
|
|
|
|
@item setopt
|
|
Valid arguments for the @option{-o} option to the @code{set} builtin
|
|
(@pxref{The Set Builtin}).
|
|
|
|
@item shopt
|
|
Shell option names as accepted by the @code{shopt} builtin
|
|
(@pxref{Bash Builtins}).
|
|
|
|
@item signal
|
|
Signal names.
|
|
|
|
@item stopped
|
|
Names of stopped jobs, if job control is active.
|
|
|
|
@item user
|
|
User names. May also be specified as @option{-u}.
|
|
|
|
@item variable
|
|
Names of all shell variables. May also be specified as @option{-v}.
|
|
@end table
|
|
|
|
@item -C @var{command}
|
|
@var{command} is executed in a subshell environment, and its output is
|
|
used as the possible completions.
|
|
|
|
@item -F @var{function}
|
|
The shell function @var{function} is executed in the current shell
|
|
environment.
|
|
When it finishes, the possible completions are retrieved from the value
|
|
of the @env{COMPREPLY} array variable.
|
|
|
|
@item -G @var{globpat}
|
|
The filename expansion pattern @var{globpat} is expanded to generate
|
|
the possible completions.
|
|
|
|
@item -P @var{prefix}
|
|
@var{prefix} is added at the beginning of each possible completion
|
|
after all other options have been applied.
|
|
|
|
@item -S @var{suffix}
|
|
@var{suffix} is appended to each possible completion
|
|
after all other options have been applied.
|
|
|
|
@item -W @var{wordlist}
|
|
The @var{wordlist} is split using the characters in the
|
|
@env{IFS} special variable as delimiters, and each resultant word
|
|
is expanded.
|
|
The possible completions are the members of the resultant list which
|
|
match the word being completed.
|
|
|
|
@item -X @var{filterpat}
|
|
@var{filterpat} is a pattern as used for filename expansion.
|
|
It is applied to the list of possible completions generated by the
|
|
preceding options and arguments, and each completion matching
|
|
@var{filterpat} is removed from the list.
|
|
A leading @samp{!} in @var{filterpat} negates the pattern; in this
|
|
case, any completion not matching @var{filterpat} is removed.
|
|
@end table
|
|
|
|
The return value is true unless an invalid option is supplied, an option
|
|
other than @option{-p} or @option{-r} is supplied without a @var{name}
|
|
argument, an attempt is made to remove a completion specification for
|
|
a @var{name} for which no specification exists, or
|
|
an error occurs adding a completion specification.
|
|
|
|
@item compopt
|
|
@btindex compopt
|
|
@example
|
|
@code{compopt} [-o @var{option}] [-DE] [+o @var{option}] [@var{name}]
|
|
@end example
|
|
Modify completion options for each @var{name} according to the
|
|
@var{option}s, or for the currently-executing completion if no @var{name}s
|
|
are supplied.
|
|
If no @var{option}s are given, display the completion options for each
|
|
@var{name} or the current completion.
|
|
The possible values of @var{option} are those valid for the @code{complete}
|
|
builtin described above.
|
|
The @option{-D} option indicates that the remaining options should
|
|
apply to the ``default'' command completion; that is, completion attempted
|
|
on a command for which no completion has previously been defined.
|
|
The @option{-E} option indicates that the remaining options should
|
|
apply to ``empty'' command completion; that is, completion attempted on a
|
|
blank line.
|
|
|
|
The @option{-D} option takes precedence over @option{-E}.
|
|
|
|
The return value is true unless an invalid option is supplied, an attempt
|
|
is made to modify the options for a @var{name} for which no completion
|
|
specification exists, or an output error occurs.
|
|
|
|
@end table
|
|
|
|
@end ifset
|