.\" Chet Ramey
.\" Information Network Services
.\" Case Western Reserve University
-.\" chet@ins.CWRU.Edu
+.\" chet.ramey@case.edu
.\"
-.\" Last Change: Tue Jan 22 09:18:25 EST 2002
+.\" Last Change: Wed Nov 19 18:32:58 EST 2014
.\"
-.TH READLINE 3 "2002 January 22" "GNU Readline 4.3"
+.TH READLINE 3 "2014 November 19" "GNU Readline 6.3"
.\"
.\" File Name macro. This used to be `.PN', for Path Name,
.\" but Sun doesn't seem to like that very much.
\fBreadline\fP (\fIconst char *prompt\fP);
.fi
.SH COPYRIGHT
-.if n Readline is Copyright (C) 1989\-2002 by the Free Software Foundation, Inc.
-.if t Readline is Copyright \(co 1989\-2002 by the Free Software Foundation, Inc.
+.if n Readline is Copyright (C) 1989\-2014 Free Software Foundation, Inc.
+.if t Readline is Copyright \(co 1989\-2014 Free Software Foundation, Inc.
.SH DESCRIPTION
.LP
.B readline
treated as a newline.
.SH NOTATION
.LP
-An emacs-style notation is used to denote
+An Emacs-style notation is used to denote
keystrokes. Control keys are denoted by C\-\fIkey\fR, e.g., C\-n
-means Control\-N. Similarly,
+means Control\-N. Similarly,
.I meta
keys are denoted by M\-\fIkey\fR, so M\-x means Meta\-X. (On keyboards
-without a
+without a
.I meta
key, M\-\fIx\fP means ESC \fIx\fP, i.e., press the Escape key
then the
which normally act as a repeat count. Sometimes, however, it is the
sign of the argument that is significant. Passing a negative argument
to a command that acts in the forward direction (e.g., \fBkill\-line\fP)
-causes that command to act in a backward direction. Commands whose
-behavior with arguments deviates from this are noted.
+causes that command to act in a backward direction.
+Commands whose behavior with arguments deviates from this are noted
+below.
.PP
When a command is described as \fIkilling\fP text, the text
deleted is saved for possible future retrieval
(\fIyanking\fP). The killed text is saved in a
\fIkill ring\fP. Consecutive kills cause the text to be
-accumulated into one unit, which can be yanked all at once.
+accumulated into one unit, which can be yanked all at once.
Commands which do not kill text separate the chunks of text
on the kill ring.
.SH INITIALIZATION FILE
.B INPUTRC
environment variable. If that variable is unset, the default is
.IR ~/.inputrc .
+If that file does not exist or cannot be read, the ultimate default is
+.IR /etc/inputrc .
When a program which uses the readline library starts up, the
init file is read, and the key bindings and variables are set.
There are only a few basic constructs allowed in the
C\-Meta\-u: universal\-argument
.RE
.sp
-into the
+into the
.I inputrc
would make M\-C\-u execute the readline command
.IR universal\-argument .
.I inputrc
file is simple. All that is required is the name of the
command or the text of a macro and a key sequence to which
-it should be bound. The name may be specified in one of two ways:
+it should be bound. The name may be specified in one of two ways:
as a symbolic key name, possibly with \fIMeta\-\fP or \fIControl\-\fP
prefixes, or as a key sequence.
+The name and key sequence are separated by a colon. There can be no
+whitespace between the name and the colon.
.PP
When using the form \fBkeyname\fP:\^\fIfunction-name\fP or \fImacro\fP,
.I keyname
.I "C-x C-r"
is bound to the function
.BR re\-read\-init\-file ,
-and
+and
.I "ESC [ 1 1 ~"
is bound to insert the text
.if t \f(CWFunction Key 1\fP.
or
.B Off
(without regard to case).
+Unrecognized variable names are ignored.
+When a variable value is read, empty or null values, "on" (case-insensitive),
+and "1" are equivalent to \fBOn\fP. All other values are equivalent to
+\fBOff\fP.
The variables and their default values are:
.PP
.PD 0
\fBvisible\fP, readline uses a visible bell if one is available.
If set to \fBaudible\fP, readline attempts to ring the terminal's bell.
.TP
+.B bind\-tty\-special\-chars (On)
+If set to \fBOn\fP (the default), readline attempts to bind the control
+characters treated specially by the kernel's terminal driver to their
+readline equivalents.
+.TP
+.B blink\-matching\-paren (Off)
+If set to \fBOn\fP, readline attempts to briefly move the cursor to an
+opening parenthesis when a closing parenthesis is inserted.
+.TP
+.B colored\-completion\-prefix (Off)
+If set to \fBOn\fP, when listing completions, readline displays the
+common prefix of the set of possible completions using a different color.
+The color definitions are taken from the value of the \fBLS_COLORS\fP
+environment variable.
+.TP
+.B colored\-stats (Off)
+If set to \fBOn\fP, readline displays possible completions using different
+colors to indicate their file type.
+The color definitions are taken from the value of the \fBLS_COLORS\fP
+environment variable.
+.TP
.B comment\-begin (``#'')
The string that is inserted in \fBvi\fP mode when the
.B insert\-comment
in emacs mode and to
.B #
in vi command mode.
+.TP
+.B completion\-display\-width (-1)
+The number of screen columns used to display possible matches
+when performing completion.
+The value is ignored if it is less than 0 or greater than the terminal
+screen width.
+A value of 0 will cause matches to be displayed one per line.
+The default value is -1.
.TP
.B completion\-ignore\-case (Off)
If set to \fBOn\fP, readline performs filename matching and completion
in a case\-insensitive fashion.
.TP
+.B completion\-map\-case (Off)
+If set to \fBOn\fP, and \fBcompletion\-ignore\-case\fP is enabled, readline
+treats hyphens (\fI\-\fP) and underscores (\fI_\fP) as equivalent when
+performing case\-insensitive filename matching and completion.
+.TP
+.B completion\-prefix\-display\-length (0)
+The length in characters of the common prefix of a list of possible
+completions that is displayed without modification. When set to a
+value greater than zero, common prefixes longer than this value are
+replaced with an ellipsis when displaying possible completions.
+.TP
.B completion\-query\-items (100)
This determines when the user is queried about viewing
the number of possible completions
zero. If the number of possible completions is greater than
or equal to the value of this variable, the user is asked whether
or not he wishes to view them; otherwise they are simply listed
-on the terminal.
+on the terminal. A negative value causes readline to never ask.
.TP
.B convert\-meta (On)
If set to \fBOn\fP, readline will convert characters with the
.TP
.B editing\-mode (emacs)
Controls whether readline begins with a set of key bindings similar
-to emacs or vi.
+to \fIEmacs\fP or \fIvi\fP.
.B editing\-mode
can be set to either
.B emacs
or
.BR vi .
.TP
+.B echo\-control\-characters (On)
+When set to \fBOn\fP, on operating systems that indicate they support it,
+readline echoes a character corresponding to a signal generated from the
+keyboard.
+.TP
+.B enable\-bracketed\-paste (Off)
+When set to \fBOn\fP, readline will configure the terminal in a way
+that will enable it to insert each paste into the editing buffer as a
+single string of characters, instead of treating each character as if
+it had been read from the keyboard. This can prevent pasted characters
+from being interpreted as editing commands.
+.TP
.B enable\-keypad (Off)
When set to \fBOn\fP, readline will try to enable the application
keypad when it is called. Some systems need this to enable the
arrow keys.
.TP
+.B enable\-meta\-key (On)
+When set to \fBOn\fP, 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.
+.TP
.B expand\-tilde (Off)
-If set to \fBon\fP, tilde expansion is performed when readline
+If set to \fBOn\fP, tilde expansion is performed when readline
attempts word completion.
.TP
-.B history-preserve-point
-If set to \fBon\fP, the history code attempts to place point at the
-same location on each history line retrived with \fBprevious-history\fP
+.B history\-preserve\-point (Off)
+If set to \fBOn\fP, the history code attempts to place point at the
+same location on each history line retrieved with \fBprevious-history\fP
or \fBnext-history\fP.
.TP
+.B history\-size (unset)
+Set the maximum number of history entries saved in the history list.
+If set to zero, any existing history entries are deleted and no new entries
+are saved.
+If set to a value less than zero, the number of history entries is not
+limited.
+By default, the number of history entries is not limited.
+.TP
.B horizontal\-scroll\-mode (Off)
When set to \fBOn\fP, makes readline use a single line for display,
scrolling the input horizontally on a single screen line when it
.B editing\-mode
also affects the default keymap.
.TP
+.B emacs\-mode\-string (@)
+This string is displayed immediately before the last line of the primary
+prompt when emacs editing mode is active. The value is expanded like a
+key binding, so the standard set of meta- and control prefixes and
+backslash escape sequences is available.
+Use the \e1 and \e2 escapes to begin and end sequences of
+non-printing characters, which can be used to embed a terminal control
+sequence into the mode string.
+.TP
+.B keyseq\-timeout (500)
+Specifies the duration \fIreadline\fP will wait for a character when reading an
+ambiguous key sequence (one that can form a complete key sequence using
+the input read so far, or can take additional input to complete a longer
+key sequence).
+If no input is received within the timeout, \fIreadline\fP will use the shorter
+but complete key sequence.
+The value is specified in milliseconds, so a value of 1000 means that
+\fIreadline\fP will wait one second for additional input.
+If this variable is set to a value less than or equal to zero, or to a
+non-numeric value, \fIreadline\fP will wait until another key is pressed to
+decide which key sequence to complete.
+.TP
.B mark\-directories (On)
If set to \fBOn\fP, completed directory names have a slash
appended.
.TP
.B match\-hidden\-files (On)
This variable, when set to \fBOn\fP, causes readline to match files whose
-names begin with a `.' (hidden files) when performing filename
-completion, unless the leading `.' is
+names begin with a `.' (hidden files) when performing filename
+completion.
+If set to \fBOff\fP, the leading `.' must be
supplied by the user in the filename to be completed.
.TP
+.B menu\-complete\-display\-prefix (Off)
+If set to \fBOn\fP, menu completion displays the common prefix of the
+list of possible completions (which may be empty) before cycling through
+the list.
+.TP
.B output\-meta (Off)
If set to \fBOn\fP, readline will display characters with the
eighth bit set directly rather than as a meta-prefixed escape
If set to \fBOn\fP, readline will display completions with matches
sorted horizontally in alphabetical order, rather than down the screen.
.TP
+.B revert\-all\-at\-newline (Off)
+If set to \fBOn\fP, readline will undo all changes to history lines
+before returning when \fBaccept\-line\fP is executed. By default,
+history lines may be modified and retain individual undo lists across
+calls to \fBreadline\fP.
+.TP
.B show\-all\-if\-ambiguous (Off)
This alters the default behavior of the completion functions. If
set to
-.BR on ,
+.BR On ,
words which have more than one possible completion cause the
matches to be listed immediately instead of ringing the bell.
.TP
+.B show\-all\-if\-unmodified (Off)
+This alters the default behavior of the completion functions in
+a fashion similar to \fBshow\-all\-if\-ambiguous\fP.
+If set to
+.BR 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.
+.TP
+.B show\-mode\-in\-prompt (Off)
+If set to \fBOn\fP, add a character to the beginning of the prompt
+indicating the editing mode: emacs, vi command, or vi insertion.
+The mode strings are user-settable.
+.TP
+.B skip\-completed\-text (Off)
+If set to \fBOn\fP, 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.
+.TP
+.B vi\-cmd\-mode\-string ((cmd))
+This string is displayed immediately before the last line of the primary
+prompt when vi editing mode is active and in command mode.
+The value is expanded like a
+key binding, so the standard set of meta- and control prefixes and
+backslash escape sequences is available.
+Use the \e1 and \e2 escapes to begin and end sequences of
+non-printing characters, which can be used to embed a terminal control
+sequence into the mode string.
+.TP
+.B vi\-ins\-mode\-string ((ins))
+This string is displayed immediately before the last line of the primary
+prompt when vi editing mode is active and in insertion mode.
+The value is expanded like a
+key binding, so the standard set of meta- and control prefixes and
+backslash escape sequences is available.
+Use the \e1 and \e2 escapes to begin and end sequences of
+non-printing characters, which can be used to embed a terminal control
+sequence into the mode string.
+.TP
.B visible\-stats (Off)
If set to \fBOn\fP, a character denoting a file's type as reported
by \fIstat\fP(2) is appended to the filename when listing possible
bindings and variable settings to be performed as the result
of tests. There are four parser directives used.
.IP \fB$if\fP
-The
+The
.B $if
construct allows bindings to be made based on the
editing mode, the terminal being used, or the application using
file 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:
+key sequence that quotes the current or previous word in \fBbash\fP:
.sp 1
.RS
.nf
Search forward through the history using a non-incremental search
for a string supplied by the user.
.TP
+.B history\-search\-backward
+Search backward through the history for the string of characters
+between the start of the current line and the current cursor
+position (the \fIpoint\fP).
+The search string must match at the beginning of a history line.
+This is a non-incremental search.
+.TP
.B history\-search\-forward
Search forward through the history for the string of characters
+between the start of the current line and the point.
+The search string must match at the beginning of a history line.
+This is a non-incremental search.
+.TP
+.B history\-substring\-search\-backward
+Search backward through the history for the string of characters
between the start of the current line and the current cursor
position (the \fIpoint\fP).
+The search string may match anywhere in a history line.
This is a non-incremental search.
.TP
-.B history\-search\-backward
-Search backward through the history for the string of characters
+.B history\-substring\-search\-forward
+Search forward through the history for the string of characters
between the start of the current line and the point.
+The search string may match anywhere in a history line.
This is a non-incremental search.
.TP
.B yank\-nth\-arg (M\-C\-y)
insert the \fIn\fPth word from the previous command (the words
in the previous command begin with word 0). A negative argument
inserts the \fIn\fPth word from the end of the previous command.
+Once the argument \fIn\fP is computed, the argument is extracted
+as if the "!\fIn\fP" history expansion had been specified.
.TP
.B
yank\-last\-arg (M\-.\^, M\-_\^)
Insert the last argument to the previous command (the last word of
-the previous history entry). With an argument,
-behave exactly like \fByank\-nth\-arg\fP.
+the previous history entry).
+With a numeric argument, behave exactly like \fByank\-nth\-arg\fP.
Successive calls to \fByank\-last\-arg\fP move back through the history
-list, inserting the last argument of each line in turn.
+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 "!$" history expansion had been specified.
.PD
.SS Commands for Changing Text
.PP
.PD 0
.TP
-.B 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 \fBdelete\-char\fP, then return
+.B \fIend\-of\-file\fP (usually C\-d)
+The character indicating end-of-file as set, for example, by
+.if t \f(CWstty\fP.
+.if n ``stty''.
+If this character is read when there are no characters
+on the line, and point is at the beginning of the line, Readline
+interprets it as the end of input and returns
.SM
.BR EOF .
.TP
+.B delete\-char (C\-d)
+Delete the character at point.
+If this function is bound to the
+same character as the tty \fBEOF\fP character, as \fBC\-d\fP
+commonly is, see above for the effects.
+.TP
.B backward\-delete\-char (Rubout)
Delete the character behind the cursor. When given a numeric argument,
save the deleted text on the kill ring.
argument, switches to insert mode. This command affects only
\fBemacs\fP mode; \fBvi\fP mode does overwrite differently.
Each call to \fIreadline()\fP starts in insert mode.
-In overwrite mode, characters bound to \fBself\-insert\fP replace
+In overwrite mode, characters bound to \fBself\-insert\fP replace
the text at point rather than pushing the text to the right.
Characters bound to \fBbackward\-delete\-char\fP replace the character
before point with a space. By default, this command is unbound.
.B kill\-whole\-line
Kill all characters on the current line, no matter where point is.
.TP
-.B kill\-word (M\-d)
+.B kill\-word (M\-d)
Kill from point the end of the current word, or if between
words, to the end of the next word. Word boundaries are the same as
those used by \fBforward\-word\fP.
Kill the word behind point, using white space as a word boundary.
The killed text is saved on the kill-ring.
.TP
+.B 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.
+.TP
.B delete\-horizontal\-space (M\-\e)
Delete all spaces and tabs around point.
.TP
.TP
.B 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 \fBcompletion-display-width\fP, the value of
+the environment variable
+.SM
+.BR COLUMNS ,
+or the screen width, in that order.
.TP
.B insert\-completions (M\-*)
Insert all completions of the text before point
Repeated execution of \fBmenu\-complete\fP 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 \Bbell\-style\fP)
+(subject to the setting of \fBbell\-style\fP)
and the original text is restored.
An argument of \fIn\fP moves \fIn\fP positions forward in the list
of matches; a negative argument may be used to move backward
This command is intended to be bound to \fBTAB\fP, but is unbound
by default.
.TP
+.B menu\-complete\-backward
+Identical to \fBmenu\-complete\fP, but moves backward through the list
+of possible completions, as if \fBmenu\-complete\fP had been given a
+negative argument. This command is unbound by default.
+.TP
.B delete\-char\-or\-list
Deletes the character under the cursor if not at the beginning or
end of the line (like \fBdelete-char\fP).
.B 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.
+.B print\-last\-kbd\-macro ()
+Print the last keyboard macro defined in a format suitable for the
+\fIinputrc\fP file.
.PD
.SS Miscellaneous
.PP
A character is read and point is moved to the previous occurrence of that
character. A negative count searches for subsequent occurrences.
.TP
+.B 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\-[.
+.TP
.B insert\-comment (M\-#)
Without a numeric argument, the value of the readline
.B 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
+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 \fBcomment\-begin\fP, the value is inserted, otherwise
the characters in \fBcomment-begin\fP are deleted from the beginning of
.TP
.B dump\-macros
Print all of the readline key sequences bound to macros and the
-strings they ouput. If a numeric argument is supplied,
+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 \fIinputrc\fP file.
.TP
.PP
Chet Ramey, Case Western Reserve University
.br
-chet@ins.CWRU.Edu
+chet.ramey@case.edu
.SH BUG REPORTS
If you find a bug in
.B readline,
.PP
Comments and bug reports concerning
this manual page should be directed to
-.IR chet@ins.CWRU.Edu .
+.IR chet.ramey@case.edu .
.SH BUGS
.PP
It's too big and too slow.
projects / deliverable / binutils-gdb.git / blobdiff