Provided by: readline-common_6.2-8_all bug

NAME

       readline - get a line from a user with editing

SYNOPSIS

       #include <stdio.h>
       #include <readline/readline.h>
       #include <readline/history.h>

       char *
       readline (const char *prompt);

COPYRIGHT

       Readline is Copyright (C) 1989-2011 Free Software Foundation,  Inc.

DESCRIPTION

       readline  will  read a line from the terminal and return it, using prompt as a prompt.  If
       prompt is NULL or the empty string, no prompt is issued.  The line returned  is  allocated
       with  malloc(3);  the  caller must free it when finished.  The line returned has the final
       newline removed, so only the text of the line remains.

       readline offers editing capabilities while the user is entering the line.  By default, the
       line editing commands are similar to those of emacs.  A vi-style line editing interface is
       also available.

       This manual page describes only the most basic use of readline.  Much  more  functionality
       is  available;  see  The  GNU  Readline Library and The GNU History Library for additional
       information.

RETURN VALUE

       readline returns the text of the line read.  A blank line returns the  empty  string.   If
       EOF  is  encountered while reading a line, and the line is empty, NULL is returned.  If an
       EOF is read with a non-empty line, it is treated as a newline.

NOTATION

       An Emacs-style notation is used to denote keystrokes.  Control keys are denoted by  C-key,
       e.g.,  C-n  means  Control-N.   Similarly,  meta  keys  are denoted by M-key, so M-x means
       Meta-X.  (On keyboards without a meta key, M-x means ESC x, i.e.,  press  the  Escape  key
       then  the  x  key.   This  makes  ESC  the  meta  prefix.   The  combination  M-C-x  means
       ESC-Control-x, or press the Escape key then hold the Control  key  while  pressing  the  x
       key.)

       Readline  commands  may  be given numeric arguments, 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., kill-line) causes
       that command to act in a backward  direction.   Commands  whose  behavior  with  arguments
       deviates from this are noted.

       When a command is described as killing text, the text deleted is saved for possible future
       retrieval (yanking).  The killed text is saved in a kill ring.   Consecutive  kills  cause
       the text to be 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.

INITIALIZATION FILE

       Readline is customized by putting commands in an initialization file (the  inputrc  file).
       The  name  of  this  file is taken from the value of the INPUTRC environment variable.  If
       that variable is unset, the default is ~/.inputrc.  If that file  does not exist or cannot
       be  read,  the  ultimate  default is /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 readline init file.  Blank lines are
       ignored.  Lines beginning with a # are  comments.   Lines  beginning  with  a  $  indicate
       conditional  constructs.   Other  lines  denote  key bindings and variable settings.  Each
       program using this library may add its own commands and bindings.

       For example, placing

              M-Control-u: universal-argument
       or
              C-Meta-u: universal-argument

       into the inputrc would make M-C-u execute the readline command universal-argument.

       The following symbolic character names are recognized while processing key bindings:  DEL,
       ESC, ESCAPE, LFD, NEWLINE, RET, RETURN, RUBOUT, SPACE, SPC, and TAB.

       In  addition  to  command  names,  readline  allows  keys  to be bound to a string that is
       inserted when the key is pressed (a macro).

   Key Bindings
       The syntax for controlling key bindings in the  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: as  a  symbolic  key  name,
       possibly with Meta- or Control- 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.

       When using the form keyname:function-name or macro, keyname is the name of a  key  spelled
       out in English.  For example:

              Control-u: universal-argument
              Meta-Rubout: backward-kill-word
              Control-o: "> output"

       In  the  above example, C-u is bound to the function universal-argument, M-DEL is bound to
       the function backward-kill-word, and C-o is bound to run the macro expressed on the  right
       hand side (that is, to insert the text ``> output'' into the line).

       In  the second form, "keyseq":function-name or macro, keyseq differs from keyname above in
       that strings denoting an entire key sequence may be  specified  by  placing  the  sequence
       within  double  quotes.  Some GNU Emacs style key escapes can be used, as in the following
       example, but the symbolic character names are not recognized.

              "\C-u": universal-argument
              "\C-x\C-r": re-read-init-file
              "\e[11~": "Function Key 1"

       In this example, C-u is again bound to the function universal-argument.  C-x C-r is  bound
       to  the function re-read-init-file, and ESC [ 1 1 ~ is bound to insert the text ``Function
       Key 1''.

       The full set of GNU Emacs style escape sequences available when specifying  key  sequences
       is
              \C-    control prefix
              \M-    meta prefix
              \e     an escape character
              \\     backslash
              \"     literal ", a double quote
              \'     literal ', a single quote

       In  addition to the GNU Emacs style escape sequences, a second set of backslash escapes is
       available:
              \a     alert (bell)
              \b     backspace
              \d     delete
              \f     form feed
              \n     newline
              \r     carriage return
              \t     horizontal tab
              \v     vertical tab
              \nnn   the eight-bit character whose value is the octal value  nnn  (one  to  three
                     digits)
              \xHH   the  eight-bit character whose value is the hexadecimal value HH (one or two
                     hex digits)

       When entering the text of a macro, single or double quotes should 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 " and '.

       Bash  allows  the  current readline key bindings to be displayed or modified with the bind
       builtin command.  The editing mode may be switched during interactive use by using the  -o
       option  to  the  set  builtin  command.  Other programs using this library provide similar
       mechanisms.  The inputrc file may be edited and re-read if a program does not provide  any
       other means to incorporate new bindings.

   Variables
       Readline has variables that can be used to further customize its behavior.  A variable may
       be set in the inputrc file with a statement of the form

              set variable-name value

       Except where noted, readline variables can take the values On or 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 On.  All other values  are
       equivalent to Off.  The variables and their default values are:

       bell-style (audible)
              Controls  what  happens  when  readline wants to ring the terminal bell.  If set to
              none, readline never rings the bell.  If set to visible, readline  uses  a  visible
              bell  if  one  is  available.   If  set  to  audible, readline attempts to ring the
              terminal's bell.
       bind-tty-special-chars (On)
              If set to On, readline attempts to bind the control characters treated specially by
              the kernel's terminal driver to their readline equivalents.
       comment-begin (``#'')
              The string that is inserted in vi mode when the insert-comment command is executed.
              This command is bound to M-# in emacs mode and to # in vi command mode.
       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.
       completion-ignore-case (Off)
              If   set   to   On,  readline  performs  filename  matching  and  completion  in  a
              case-insensitive fashion.
       completion-map-case (Off)
              If set to On, and completion-ignore-case is enabled, readline  treats  hyphens  (-)
              and  underscores  (_)  as  equivalent  when  performing  case-insensitive  filename
              matching and completion.
       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.
       completion-query-items (100)
              This  determines  when  the  user  is  queried about viewing the number of possible
              completions generated by the possible-completions command.  It may be  set  to  any
              integer value greater than or equal to 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.  A
              negative value causes readline to never ask.
       convert-meta (On)
              If set to On, readline will convert characters with the eighth bit set to an  ASCII
              key  sequence by stripping the eighth bit and prefixing it with an escape character
              (in effect, using escape as the meta prefix).
       disable-completion (Off)
              If set to On, readline will inhibit word completion.  Completion characters will be
              inserted into the line as if they had been mapped to self-insert.
       editing-mode (emacs)
              Controls whether readline begins with a set of key bindings similar to Emacs or vi.
              editing-mode can be set to either emacs or vi.
       echo-control-characters (On)
              When set to On, on operating systems that indicate they support it, readline echoes
              a character corresponding to a signal generated from the keyboard.
       enable-keypad (Off)
              When  set  to  On,  readline  will  try to enable the application keypad when it is
              called.  Some systems need this to enable the arrow keys.
       enable-meta-key (On)
              When set to 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.
       expand-tilde (Off)
              If set to On, tilde expansion is performed when readline attempts word completion.
       history-preserve-point (Off)
              If set to On, the history code attempts to place point at the same location on each
              history line retrieved with previous-history or next-history.
       history-size (0)
              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.
       horizontal-scroll-mode (Off)
              When set to On, makes readline use a single line for display, scrolling  the  input
              horizontally  on  a single screen line when it becomes longer than the screen width
              rather than wrapping to a new line.
       input-meta (Off)
              If set to On, readline will enable eight-bit input (that is, it will not clear  the
              eighth  bit  in the characters it reads), regardless of what the terminal claims it
              can support.  The name meta-flag is a synonym for this variable.
       isearch-terminators (``C-[ C-J'')
              The string of characters  that  should  terminate  an  incremental  search  without
              subsequently  executing  the character as a command.  If this variable has not been
              given a value, the characters ESC and C-J will terminate an incremental search.
       keymap (emacs)
              Set the current readline keymap.  The set of legal keymap names  is  emacs,  emacs-
              standard,  emacs-meta,  emacs-ctlx,  vi, vi-move, vi-command, and vi-insert.  vi is
              equivalent to vi-command; emacs is equivalent to emacs-standard.  The default value
              is emacs.  The value of editing-mode also affects the default keymap.
       mark-directories (On)
              If set to On, completed directory names have a slash appended.
       mark-modified-lines (Off)
              If  set to On, history lines that have been modified are displayed with a preceding
              asterisk (*).
       mark-symlinked-directories (Off)
              If set to On, completed names which are symbolic links to directories have a  slash
              appended (subject to the value of mark-directories).
       match-hidden-files (On)
              This  variable,  when  set  to On, causes readline to match files whose names begin
              with a `.' (hidden files) when performing filename completion.  If set to Off,  the
              leading `.' must be supplied by the user in the filename to be completed.
       menu-complete-display-prefix (Off)
              If  set  to  On, menu completion displays the common prefix of the list of possible
              completions (which may be empty) before cycling through the list.
       output-meta (Off)
              If set to On, readline will display characters with the  eighth  bit  set  directly
              rather than as a meta-prefixed escape sequence.
       page-completions (On)
              If  set  to On, readline uses an internal more-like pager to display a screenful of
              possible completions at a time.
       print-completions-horizontally (Off)
              If set to On, readline will display completions with matches sorted horizontally in
              alphabetical order, rather than down the screen.
       revert-all-at-newline (Off)
              If set to On, readline will undo all changes to history lines before returning when
              accept-line is executed.  By default, history lines  may  be  modified  and  retain
              individual undo lists across calls to readline.
       show-all-if-ambiguous (Off)
              This  alters the default behavior of the completion functions.  If set to On, words
              which have more than one  possible  completion  cause  the  matches  to  be  listed
              immediately instead of ringing the bell.
       show-all-if-unmodified (Off)
              This  alters  the default behavior of the completion functions in a fashion similar
              to show-all-if-ambiguous.  If set to 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.
       skip-completed-text (Off)
              If  set  to 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.
       visible-stats (Off)
              If set to On, a character denoting a file's type as reported by stat(2) is appended
              to the filename when listing possible completions.

   Conditional 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.

       $if    The $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.

              mode   The mode= form of the $if directive is used to test whether readline  is  in
                     emacs  or  vi  mode.   This  may  be used in conjunction with the set keymap
                     command, for instance, to set bindings in the emacs-standard and  emacs-ctlx
                     keymaps only if readline is starting out in emacs mode.

              term   The  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 = is tested against the full name of the
                     terminal and the portion of the terminal name  before  the  first  -.   This
                     allows sun to match both sun and sun-cmd, for instance.

              application
                     The  application construct is used to include application-specific settings.
                     Each program using the readline library sets the application  name,  and  an
                     initialization  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:

                     $if Bash
                     # Quote the current or previous word
                     "\C-xq": "\eb\"\ef\""
                     $endif

       $endif This command, as seen in the previous example, terminates an $if command.

       $else  Commands in this branch of the $if directive are executed if the test fails.

       $include
              This directive takes a single filename  as  an  argument  and  reads  commands  and
              bindings  from  that  file.   For  example,  the  following  directive  would  read
              /etc/inputrc:

              $include  /etc/inputrc

SEARCHING

       Readline provides commands for searching through the command history for lines  containing
       a specified string.  There are two search modes: incremental and non-incremental.

       Incremental searches begin before the user has finished typing the search string.  As each
       character of the search string is typed, readline displays the next entry from the history
       matching  the string typed so far.  An incremental search requires only as many characters
       as needed to find the desired history entry.  To search backward  in  the  history  for  a
       particular  string,  type  C-r.   Typing  C-s  searches  forward through the history.  The
       characters present in the value of the isearch-terminators variable are used to  terminate
       an  incremental search.  If that variable has not been assigned a value the Escape and C-J
       characters will terminate an incremental search.  C-G will abort an incremental search and
       restore  the  original  line.  When the search is terminated, the history entry containing
       the search string becomes the current line.

       To find other matching entries in the history list, type C-s or C-r as appropriate.   This
       will  search  backward  or  forward  in  the history for the next line matching the search
       string typed so far.  Any other key sequence bound to a readline  command  will  terminate
       the  search  and  execute that command.  For instance, a newline will terminate the search
       and accept the line, thereby executing the command from  the  history  list.   A  movement
       command  will  terminate  the search, make the last line found the current line, and begin
       editing.

       Non-incremental searches read the entire search  string  before  starting  to  search  for
       matching  history  lines.   The  search  string may be typed by the user or be part of the
       contents of the current line.

EDITING COMMANDS

       The following is a list of the names of the commands and  the  default  key  sequences  to
       which  they  are bound.  Command names without an accompanying key sequence are unbound by
       default.

       In the following descriptions, point refers to  the  current  cursor  position,  and  mark
       refers to a cursor position saved by the set-mark command.  The text between the point and
       mark is referred to as the region.

   Commands for Moving
       beginning-of-line (C-a)
              Move to the start of the current line.
       end-of-line (C-e)
              Move to the end of the line.
       forward-char (C-f)
              Move forward a character.
       backward-char (C-b)
              Move back a character.
       forward-word (M-f)
              Move forward to the end of the next  word.   Words  are  composed  of  alphanumeric
              characters (letters and digits).
       backward-word (M-b)
              Move  back  to  the  start  of the current or previous word.  Words are composed of
              alphanumeric characters (letters and digits).
       clear-screen (C-l)
              Clear the screen leaving the current line at  the  top  of  the  screen.   With  an
              argument, refresh the current line without clearing the screen.
       redraw-current-line
              Refresh the current line.

   Commands for Manipulating the History
       accept-line (Newline, Return)
              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 add_history().  If the line
              is a modified history line, the history line is restored to its original state.
       previous-history (C-p)
              Fetch the previous command from the history list, moving back in the list.
       next-history (C-n)
              Fetch the next command from the history list, moving forward in the list.
       beginning-of-history (M-<)
              Move to the first line in the history.
       end-of-history (M->)
              Move to the end of the input history, i.e., the line currently being entered.
       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.
       forward-search-history (C-s)
              Search forward starting at the current line and moving `down' through  the  history
              as necessary.  This is an incremental search.
       non-incremental-reverse-search-history (M-p)
              Search  backward  through  the  history  starting  at the current line using a non-
              incremental search for a string supplied by the user.
       non-incremental-forward-search-history (M-n)
              Search forward through the history using a  non-incremental  search  for  a  string
              supplied by the user.
       history-search-forward
              Search  forward  through the history for the string of characters between the start
              of the current line and the current cursor position (the point).  This  is  a  non-
              incremental search.
       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.
       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 n, insert the nth word from the previous
              command (the words in the previous command begin with word 0).  A negative argument
              inserts  the nth word from the end of the previous command.  Once the argument n is
              computed, the argument is extracted as if  the  "!n"  history  expansion  had  been
              specified.
       yank-last-arg (M-., M-_)
              Insert  the  last  argument  to the previous command (the last word of the previous
              history entry).   With  a  numeric  argument,  behave  exactly  like  yank-nth-arg.
              Successive calls to 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 "!$" history expansion had been specified.

   Commands for Changing Text
       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
              delete-char, then return EOF.
       backward-delete-char (Rubout)
              Delete the character behind the cursor.  When given a numeric  argument,  save  the
              deleted text on the kill ring.
       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.
       quoted-insert (C-q, C-v)
              Add the next character that you type to the line verbatim.  This is how  to  insert
              characters like C-q, for example.
       tab-insert (M-TAB)
              Insert a tab character.
       self-insert (a, b, A, 1, !, ...)
              Insert the character typed.
       transpose-chars (C-t)
              Drag  the  character before point forward over the character at point, moving point
              forward as well.  If point is at the end of the line, then this transposes the  two
              characters before point.  Negative arguments have no effect.
       transpose-words (M-t)
              Drag  the  word before point past the word after point, moving point over that word
              as well.  If point is at the end of the line, this transposes the last two words on
              the line.
       upcase-word (M-u)
              Uppercase the current (or following) word.  With a negative argument, uppercase the
              previous word, but do not move point.
       downcase-word (M-l)
              Lowercase the current (or following) word.  With a negative argument, lowercase the
              previous word, but do not move point.
       capitalize-word (M-c)
              Capitalize  the  current (or following) word.  With a negative argument, capitalize
              the previous word, but do not move point.
       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 emacs mode; vi mode  does  overwrite  differently.
              Each call to readline() starts in insert mode.  In overwrite mode, characters bound
              to self-insert replace the text at point rather than pushing the text to the right.
              Characters  bound to backward-delete-char replace the character before point with a
              space.  By default, this command is unbound.

   Killing and Yanking
       kill-line (C-k)
              Kill the text from point to the end of the line.
       backward-kill-line (C-x Rubout)
              Kill backward to the beginning of the line.
       unix-line-discard (C-u)
              Kill backward from point to the beginning of the line.  The killed text is saved on
              the kill-ring.
       kill-whole-line
              Kill all characters on the current line, no matter where point is.
       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 forward-word.
       backward-kill-word (M-Rubout)
              Kill the word behind point.   Word  boundaries  are  the  same  as  those  used  by
              backward-word.
       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.
       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.
       delete-horizontal-space (M-\)
              Delete all spaces and tabs around point.
       kill-region
              Kill  the  text  between  the point and mark (saved cursor position).  This text is
              referred to as the region.
       copy-region-as-kill
              Copy the text in the region to the kill buffer.
       copy-backward-word
              Copy the word before point to the kill buffer.  The word boundaries are the same as
              backward-word.
       copy-forward-word
              Copy the word following point to the kill buffer.  The word boundaries are the same
              as forward-word.
       yank (C-y)
              Yank the top of the kill ring into the buffer at point.
       yank-pop (M-y)
              Rotate the kill ring, and yank the new top.  Only works following yank or yank-pop.

   Numeric Arguments
       digit-argument (M-0, M-1, ..., M--)
              Add this digit to the argument already accumulating, or start a new argument.   M--
              starts a negative argument.
       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 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.

   Completing
       complete (TAB)
              Attempt to perform completion on the text  before  point.   The  actual  completion
              performed   is  application-specific.   Bash,  for  instance,  attempts  completion
              treating the text as a variable (if the text begins with $), username (if the  text
              begins with ~), hostname (if the text begins with @), or command (including aliases
              and functions) in turn.  If none of these produces a match, filename completion  is
              attempted.   Gdb,  on  the  other  hand, allows completion of program functions and
              variables, and only attempts filename completion under certain circumstances.
       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
              completion-display-width, the value of the environment  variable  COLUMNS,  or  the
              screen width, in that order.
       insert-completions (M-*)
              Insert  all  completions of the text before point that would have been generated by
              possible-completions.
       menu-complete
              Similar to complete, but replaces the word to be completed with a single match from
              the  list  of  possible  completions.   Repeated  execution  of 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 bell-style)
              and the original text is restored.  An argument of n moves 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 TAB, but is unbound by default.
       menu-complete-backward
              Identical to menu-complete,  but  moves  backward  through  the  list  of  possible
              completions,  as if menu-complete had been given a negative argument.  This command
              is unbound by default.
       delete-char-or-list
              Deletes the character under the cursor if not at the beginning or end of  the  line
              (like  delete-char).   If  at the end of the line, behaves identically to possible-
              completions.

   Keyboard Macros
       start-kbd-macro (C-x ()
              Begin saving the characters typed into the current keyboard macro.
       end-kbd-macro (C-x ))
              Stop saving the characters typed into the current  keyboard  macro  and  store  the
              definition.
       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.

   Miscellaneous
       re-read-init-file (C-x C-r)
              Read in the contents of the inputrc file, and incorporate any bindings or  variable
              assignments found there.
       abort (C-g)
              Abort  the  current  editing  command  and ring the terminal's bell (subject to the
              setting of bell-style).
       do-uppercase-version (M-a, M-b, M-x, ...)
              If the metafied character x is lowercase, run the command  that  is  bound  to  the
              corresponding uppercase character.
       prefix-meta (ESC)
              Metafy the next character typed.  ESC f is equivalent to Meta-f.
       undo (C-_, C-x C-u)
              Incremental undo, separately remembered for each line.
       revert-line (M-r)
              Undo all changes made to this line.  This is like executing the undo command enough
              times to return the line to its initial state.
       tilde-expand (M-&)
              Perform tilde expansion on the current word.
       set-mark (C-@, M-<space>)
              Set the mark to the point.  If a numeric argument is supplied, the mark is  set  to
              that position.
       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.
       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.
       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.
       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  "\[",  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-[.
       insert-comment (M-#)
              Without  a  numeric  argument,  the value of the readline 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  comment-begin,  the  value  is  inserted,  otherwise  the
              characters  in comment-begin are deleted from the beginning of the line.  In either
              case, the line is accepted as if a newline had been typed.  The  default  value  of
              comment-begin makes 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.
       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 inputrc file.
       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 inputrc file.
       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 inputrc file.
       emacs-editing-mode (C-e)
              When in vi command mode, this causes a switch to emacs editing mode.
       vi-editing-mode (M-C-j)
              When in emacs editing mode, this causes a switch to vi editing mode.

DEFAULT KEY BINDINGS

       The following is a list of the default emacs and vi bindings.  Characters with the  eighth
       bit  set  are  written  as M-<character>, and are referred to as metafied characters.  The
       printable ASCII characters not mentioned in the list of emacs standard bindings are  bound
       to  the  self-insert function, which just inserts the given character into the input line.
       In vi insertion mode, all characters not specifically mentioned are bound to  self-insert.
       Characters assigned to signal generation by stty(1) or the terminal driver, such as C-Z or
       C-C, retain that function.  Upper and lower case metafied characters are bound to the same
       function  in  the  emacs  mode  meta  keymap.  The remaining characters are unbound, which
       causes readline to ring the bell (subject to the setting of the bell-style variable).

   Emacs Mode
             Emacs Standard bindings

             "C-@"  set-mark
             "C-A"  beginning-of-line
             "C-B"  backward-char
             "C-D"  delete-char
             "C-E"  end-of-line
             "C-F"  forward-char
             "C-G"  abort
             "C-H"  backward-delete-char
             "C-I"  complete
             "C-J"  accept-line
             "C-K"  kill-line
             "C-L"  clear-screen
             "C-M"  accept-line
             "C-N"  next-history
             "C-P"  previous-history
             "C-Q"  quoted-insert
             "C-R"  reverse-search-history
             "C-S"  forward-search-history
             "C-T"  transpose-chars
             "C-U"  unix-line-discard
             "C-V"  quoted-insert
             "C-W"  unix-word-rubout
             "C-Y"  yank
             "C-]"  character-search
             "C-_"  undo
             " " to "/"  self-insert
             "0"  to "9"  self-insert
             ":"  to "~"  self-insert
             "C-?"  backward-delete-char

             Emacs Meta bindings

             "M-C-G"  abort
             "M-C-H"  backward-kill-word
             "M-C-I"  tab-insert
             "M-C-J"  vi-editing-mode
             "M-C-M"  vi-editing-mode
             "M-C-R"  revert-line
             "M-C-Y"  yank-nth-arg
             "M-C-["  complete
             "M-C-]"  character-search-backward
             "M-space"  set-mark
             "M-#"  insert-comment
             "M-&"  tilde-expand
             "M-*"  insert-completions
             "M--"  digit-argument
             "M-."  yank-last-arg
             "M-0"  digit-argument
             "M-1"  digit-argument
             "M-2"  digit-argument
             "M-3"  digit-argument
             "M-4"  digit-argument
             "M-5"  digit-argument
             "M-6"  digit-argument
             "M-7"  digit-argument
             "M-8"  digit-argument
             "M-9"  digit-argument
             "M-<"  beginning-of-history
             "M-="  possible-completions
             "M->"  end-of-history
             "M-?"  possible-completions
             "M-B"  backward-word
             "M-C"  capitalize-word
             "M-D"  kill-word
             "M-F"  forward-word
             "M-L"  downcase-word
             "M-N"  non-incremental-forward-search-history
             "M-P"  non-incremental-reverse-search-history
             "M-R"  revert-line
             "M-T"  transpose-words
             "M-U"  upcase-word
             "M-Y"  yank-pop
             "M-\"  delete-horizontal-space
             "M-~"  tilde-expand
             "M-C-?"  backward-kill-word
             "M-_"  yank-last-arg

             Emacs Control-X bindings

             "C-XC-G"  abort
             "C-XC-R"  re-read-init-file
             "C-XC-U"  undo
             "C-XC-X"  exchange-point-and-mark
             "C-X("  start-kbd-macro
             "C-X)"  end-kbd-macro
             "C-XE"  call-last-kbd-macro
             "C-XC-?"  backward-kill-line

   VI Mode bindings
             VI Insert Mode functions

             "C-D"  vi-eof-maybe
             "C-H"  backward-delete-char
             "C-I"  complete
             "C-J"  accept-line
             "C-M"  accept-line
             "C-R"  reverse-search-history
             "C-S"  forward-search-history
             "C-T"  transpose-chars
             "C-U"  unix-line-discard
             "C-V"  quoted-insert
             "C-W"  unix-word-rubout
             "C-Y"  yank
             "C-["  vi-movement-mode
             "C-_"  undo
             " " to "~"  self-insert
             "C-?"  backward-delete-char

             VI Command Mode functions

             "C-D"  vi-eof-maybe
             "C-E"  emacs-editing-mode
             "C-G"  abort
             "C-H"  backward-char
             "C-J"  accept-line
             "C-K"  kill-line
             "C-L"  clear-screen
             "C-M"  accept-line
             "C-N"  next-history
             "C-P"  previous-history
             "C-Q"  quoted-insert
             "C-R"  reverse-search-history
             "C-S"  forward-search-history
             "C-T"  transpose-chars
             "C-U"  unix-line-discard
             "C-V"  quoted-insert
             "C-W"  unix-word-rubout
             "C-Y"  yank
             "C-_"  vi-undo
             " "  forward-char
             "#"  insert-comment
             "$"  end-of-line
             "%"  vi-match
             "&"  vi-tilde-expand
             "*"  vi-complete
             "+"  next-history
             ","  vi-char-search
             "-"  previous-history
             "."  vi-redo
             "/"  vi-search
             "0"  beginning-of-line
             "1" to "9"  vi-arg-digit
             ";"  vi-char-search
             "="  vi-complete
             "?"  vi-search
             "A"  vi-append-eol
             "B"  vi-prev-word
             "C"  vi-change-to
             "D"  vi-delete-to
             "E"  vi-end-word
             "F"  vi-char-search
             "G"  vi-fetch-history
             "I"  vi-insert-beg
             "N"  vi-search-again
             "P"  vi-put
             "R"  vi-replace
             "S"  vi-subst
             "T"  vi-char-search
             "U"  revert-line
             "W"  vi-next-word
             "X"  backward-delete-char
             "Y"  vi-yank-to
             "\"  vi-complete
             "^"  vi-first-print
             "_"  vi-yank-arg
             "`"  vi-goto-mark
             "a"  vi-append-mode
             "b"  vi-prev-word
             "c"  vi-change-to
             "d"  vi-delete-to
             "e"  vi-end-word
             "f"  vi-char-search
             "h"  backward-char
             "i"  vi-insertion-mode
             "j"  next-history
             "k"  prev-history
             "l"  forward-char
             "m"  vi-set-mark
             "n"  vi-search-again
             "p"  vi-put
             "r"  vi-change-char
             "s"  vi-subst
             "t"  vi-char-search
             "u"  vi-undo
             "w"  vi-next-word
             "x"  vi-delete
             "y"  vi-yank-to
             "|"  vi-column
             "~"  vi-change-case

SEE ALSO

       The Gnu Readline Library, Brian Fox and Chet Ramey
       The Gnu History Library, Brian Fox and Chet Ramey
       bash(1)

FILES

       ~/.inputrc
              Individual readline initialization file

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@ins.CWRU.Edu

BUG REPORTS

       If you find a bug in readline, you should report it.  But first, you should make sure that
       it really is a bug, and that it appears in the latest version of the readline library that
       you have.

       Once  you  have  determined  that  a  bug  actually  exists,  mail   a   bug   report   to
       bug-readline@gnu.org.   If  you  have  a  fix,  you  are  welcome  to  mail  that as well!
       Suggestions and `philosophical' bug reports  may  be  mailed  to  bug-readline@gnu.org  or
       posted to the Usenet newsgroup gnu.bash.bug.

       Comments   and   bug   reports   concerning   this  manual  page  should  be  directed  to
       chet@ins.CWRU.Edu.

BUGS

       It's too big and too slow.