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Diffstat (limited to 'readline/doc/inc-hist.texinfo')
| -rw-r--r-- | readline/doc/inc-hist.texinfo | 79 |
1 files changed, 49 insertions, 30 deletions
diff --git a/readline/doc/inc-hist.texinfo b/readline/doc/inc-hist.texinfo index 37ed15f4dd1..b5ed3cb4830 100644 --- a/readline/doc/inc-hist.texinfo +++ b/readline/doc/inc-hist.texinfo @@ -1,7 +1,7 @@ @ignore This file documents the user interface to the GNU History library. -Copyright (C) 1988-1999 Free Software Foundation, Inc. +Copyright (C) 1988-2002 Free Software Foundation, Inc. Authored by Brian Fox and Chet Ramey. Permission is granted to make and distribute verbatim copies of this manual @@ -38,11 +38,10 @@ For information on using the @sc{gnu} History Library in other programs, see the @sc{gnu} Readline Library Manual. @end ifset @ifclear BashFeatures -This chapter describes how to use the GNU History Library interactively, +This chapter describes how to use the @sc{gnu} History Library interactively, from a user's standpoint. It should be considered a user's guide. -@c For -@c information on using the GNU History Library in your own programs, -@c @pxref{Programming with GNU History}. +For information on using the @sc{gnu} History Library in other programs, +see the @sc{gnu} Readline Library Manual. @end ifclear @ifset BashFeatures @@ -66,36 +65,39 @@ from a user's standpoint. It should be considered a user's guide. @cindex command history @cindex history list -When the @samp{-o history} option to the @code{set} builtin +When the @option{-o history} option to the @code{set} builtin is enabled (@pxref{The Set Builtin}), -the shell provides access to the @var{command history}, +the shell provides access to the @dfn{command history}, the list of commands previously typed. -The value of the @code{HISTSIZE} shell variable is used as the +The value of the @env{HISTSIZE} shell variable is used as the number of commands to save in a history list. -The text of the last @code{$HISTSIZE} +The text of the last @env{$HISTSIZE} commands (default 500) is saved. The shell stores each command in the history list prior to parameter and variable expansion but after history expansion is performed, subject to the values of the shell variables -@code{HISTIGNORE} and @code{HISTCONTROL}. +@env{HISTIGNORE} and @env{HISTCONTROL}. When the shell starts up, the history is initialized from the -file named by the @code{HISTFILE} variable (default @file{~/.bash_history}). -The file named by the value of @code{HISTFILE} is truncated, if +file named by the @env{HISTFILE} variable (default @file{~/.bash_history}). +The file named by the value of @env{HISTFILE} is truncated, if necessary, to contain no more than the number of lines specified by -the value of the @code{HISTFILESIZE} variable. +the value of the @env{HISTFILESIZE} variable. When an interactive shell exits, the last -@code{$HISTSIZE} lines are copied from the history list to the file -named by @code{$HISTFILE}. +@env{$HISTSIZE} lines are copied from the history list to the file +named by @env{$HISTFILE}. If the @code{histappend} shell option is set (@pxref{Bash Builtins}), the lines are appended to the history file, otherwise the history file is overwritten. -If @code{HISTFILE} +If @env{HISTFILE} is unset, or if the history file is unwritable, the history is not saved. After saving the history, the history file is truncated -to contain no more than @code{$HISTFILESIZE} -lines. If @code{HISTFILESIZE} is not set, no truncation is performed. +to contain no more than @env{$HISTFILESIZE} +lines. If @env{HISTFILESIZE} is not set, no truncation is performed. + +If the @env{HISTTIMEFORMAT} is set, the time stamp information +associated with each history entry is written to the history file. The builtin command @code{fc} may be used to list or edit and re-execute a portion of the history list. @@ -106,7 +108,7 @@ are available in each editing mode that provide access to the history list (@pxref{Commands For History}). The shell allows control over which commands are saved on the history -list. The @code{HISTCONTROL} and @code{HISTIGNORE} +list. The @env{HISTCONTROL} and @env{HISTIGNORE} variables may be set to cause the shell to save only a subset of the commands entered. The @code{cmdhist} @@ -142,15 +144,15 @@ command beginning with that string) or as a number (an index into the history list, where a negative number is used as an offset from the current command number). If @var{last} is not specified it is set to @var{first}. If @var{first} is not specified it is set to the previous -command for editing and @minus{}16 for listing. If the @samp{-l} flag is -given, the commands are listed on standard output. The @samp{-n} flag -suppresses the command numbers when listing. The @samp{-r} flag +command for editing and @minus{}16 for listing. If the @option{-l} flag is +given, the commands are listed on standard output. The @option{-n} flag +suppresses the command numbers when listing. The @option{-r} flag reverses the order of the listing. Otherwise, the editor given by @var{ename} is invoked on a file containing those commands. If @var{ename} is not given, the value of the following variable expansion is used: @code{$@{FCEDIT:-$@{EDITOR:-vi@}@}}. This says to use the -value of the @code{FCEDIT} variable if set, or the value of the -@code{EDITOR} variable if that is set, or @code{vi} if neither is set. +value of the @env{FCEDIT} variable if set, or the value of the +@env{EDITOR} variable if that is set, or @code{vi} if neither is set. When editing is complete, the edited commands are echoed and executed. In the second form, @var{command} is re-executed after each instance @@ -171,8 +173,14 @@ history -ps @var{arg} @end example With no options, display the history list with line numbers. -Lines prefixed with with a @samp{*} have been modified. +Lines prefixed with a @samp{*} have been modified. An argument of @var{n} lists only the last @var{n} lines. +If the shell variable @env{HISTTIMEFORMAT} is set and not null, +it is used as a format string for @var{strftime} to display +the time stamp associated with each displayed history entry. +No intervening blank is printed between the formatted time stamp +and the history line. + Options, if supplied, have the following meanings: @table @code @@ -212,10 +220,10 @@ the history list as a single entry. @end table -When any of the @samp{-w}, @samp{-r}, @samp{-a}, or @samp{-n} options is +When any of the @option{-w}, @option{-r}, @option{-a}, or @option{-n} options is used, if @var{filename} is given, then it is used as the history file. If not, then -the value of the @code{HISTFILE} variable is used. +the value of the @env{HISTFILE} variable is used. @end table @end ifset @@ -261,9 +269,9 @@ editing buffer for further modification. If Readline is being used, and the @code{histreedit} shell option is enabled, a failed history expansion will be reloaded into the Readline editing buffer for correction. -The @samp{-p} option to the @code{history} builtin command +The @option{-p} option to the @code{history} builtin command may be used to see what a history expansion will do before using it. -The @samp{-s} option to the @code{history} builtin may be used to +The @option{-s} option to the @code{history} builtin may be used to add commands to the end of the history list without actually executing them, so that they are available for subsequent recall. This is most useful in conjunction with Readline. @@ -289,8 +297,15 @@ history list. @table @asis @item @code{!} +@ifset BashFeatures Start a history substitution, except when followed by a space, tab, -the end of the line, @samp{=} or @samp{(}. +the end of the line, @samp{=} or @samp{(} (when the +@code{extglob} shell option is enabled using the @code{shopt} builtin). +@end ifset +@ifclear BashFeatures +Start a history substitution, except when followed by a space, tab, +the end of the line, or @samp{=}. +@end ifclear @item @code{!@var{n}} Refer to command line @var{n}. @@ -431,8 +446,12 @@ character on the input line. Repeat the previous substitution. @item g +@itemx a Cause changes to be applied over the entire event line. Used in conjunction with @samp{s}, as in @code{gs/@var{old}/@var{new}/}, or with @samp{&}. +@item G +Apply the following @samp{s} modifier once to each word in the event. + @end table |