diff options
Diffstat (limited to 'doc/bashref.texi')
| -rw-r--r-- | doc/bashref.texi | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/doc/bashref.texi b/doc/bashref.texi index b11aae62..23e733a2 100644 --- a/doc/bashref.texi +++ b/doc/bashref.texi @@ -14,7 +14,7 @@ This is Edition @value{EDITION}, last updated @value{UPDATED}, of @cite{The GNU Bash Reference Manual}, for @code{Bash}, Version @value{VERSION}. -Copyright @copyright{} 1988--2013 Free Software Foundation, Inc. +Copyright @copyright{} 1988--2014 Free Software Foundation, Inc. @quotation Permission is granted to copy, distribute and/or modify this document @@ -1565,7 +1565,8 @@ only be referenced; assignment to them is not allowed. @vtable @code @item * -Expands to the positional parameters, starting from one. When the +@vindex $* +($*) Expands to the positional parameters, starting from one. When the expansion occurs within double quotes, it expands to a single word with the value of each parameter separated by the first character of the @env{IFS} @@ -1579,7 +1580,8 @@ separators. @item @@ -Expands to the positional parameters, starting from one. When the +@vindex $@@ +($@@) Expands to the positional parameters, starting from one. When the expansion occurs within double quotes, each parameter expands to a separate word. That is, @code{"$@@"} is equivalent to @code{"$1" "$2" @dots{}}. @@ -1592,29 +1594,35 @@ When there are no positional parameters, @code{"$@@"} and expand to nothing (i.e., they are removed). @item # -Expands to the number of positional parameters in decimal. +@vindex $# +($#) Expands to the number of positional parameters in decimal. @item ? -Expands to the exit status of the most recently executed foreground +@vindex $? +($?) Expands to the exit status of the most recently executed foreground pipeline. @item - -(A hyphen.) Expands to the current option flags as specified upon +@vindex $- +($-, a hyphen.) Expands to the current option flags as specified upon invocation, by the @code{set} builtin command, or those set by the shell itself (such as the @option{-i} option). @item $ -Expands to the process @sc{id} of the shell. In a @code{()} subshell, it +@vindex $$ +($$) Expands to the process @sc{id} of the shell. In a @code{()} subshell, it expands to the process @sc{id} of the invoking shell, not the subshell. @item ! -Expands to the process @sc{id} of the job most recently placed into the +@vindex $! +($!) Expands to the process @sc{id} of the job most recently placed into the background, whether executed as an asynchronous command or using the @code{bg} builtin (@pxref{Job Control Builtins}). @item 0 -Expands to the name of the shell or shell script. This is set at +@vindex $0 +($0) Expands to the name of the shell or shell script. This is set at shell initialization. If Bash is invoked with a file of commands (@pxref{Shell Scripts}), @code{$0} is set to the name of that file. If Bash is started with the @option{-c} option (@pxref{Invoking Bash}), @@ -1623,7 +1631,8 @@ executed, if one is present. Otherwise, it is set to the filename used to invoke Bash, as given by argument zero. @item _ -(An underscore.) +@vindex $_ +($_, an underscore.) At shell startup, set to the absolute pathname used to invoke the shell or shell script being executed as passed in the environment or argument list. |