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[linuxjm/jm.git] / manual / GNU_bash / work / P13

.TP
\fBshopt\fP [\fB\-pqsu\fP] [\fB\-o\fP] [\fIoptname\fP ...]
.\"O Toggle the values of variables controlling optional shell behavior.
.\"O With no options, or with the
.\"O .B \-p
.\"O option, a list of all settable options is displayed, with
.\"O an indication of whether or not each is set.
.\"O The \fB\-p\fP option causes output to be displayed in a form that
.\"O may be reused as input.
.\"O Other options have the following meanings:
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.B \-s
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.B \-u
.\"O Disable (unset) each \fIoptname\fP.
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.TP
.B \-q
.\"O Suppresses normal output (quiet mode); the return status indicates
.\"O whether the \fIoptname\fP is set or unset.
.\"O If multiple \fIoptname\fP arguments are given with
.\"O .BR \-q ,
.\"O the return status is zero if all \fIoptnames\fP are enabled; non-zero
.\"O otherwise.
.\"O NAKANO ¤¦¡¼¤à, silent mode ¤È quiet ¥â¡¼¥É¤Ï¤É¤¦°ã¤¦¤Î¤À¤í¤¦ :-)
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.B \-o
.\"O Restricts the values of \fIoptname\fP to be those defined for the
.\"O .B \-o
.\"O option to the
.\"O .B set
.\"O builtin.
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.B set
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.B \-o
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.PP
.\"O If either
.\"O .B \-s
.\"O or
.\"O .B \-u
.\"O is used with no \fIoptname\fP arguments, the display is limited to
.\"O those options which are set or unset, respectively.
.\"O Unless otherwise noted, the \fBshopt\fP options are disabled (unset)
.\"O by default.
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.B \-s
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.\"O The return status when listing options is zero if all \fIoptnames\fP
.\"O are enabled, non-zero otherwise.  When setting or unsetting options,
.\"O the return status is zero unless an \fIoptname\fP is not a valid shell
.\"O option.
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.PP
.\"O The list of \fBshopt\fP options is:
\fBshopt\fP ¥ª¥×¥·¥ç¥ó¤Î¥ê¥¹¥È¤ò°Ê²¼¤Ë¼¨¤·¤Þ¤¹:
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.TP 8
.B cdable_vars
.\"O If set, an argument to the
.\"O .B cd
.\"O builtin command that
.\"O is not a directory is assumed to be the name of a variable whose
.\"O value is the directory to change to.
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.B cd
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.TP 8
.B cdspell
.\"O If set, minor errors in the spelling of a directory component in a
.\"O .B cd
.\"O command will be corrected.
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.B cd
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.\"O The errors checked for are transposed characters,
.\"O a missing character, and one character too many.
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.\"O If a correction is found, the corrected file name is printed,
.\"O and the command proceeds.
.\"O This option is only used by interactive shells.
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.TP 8
.B checkhash
.\"O If set, \fBbash\fP checks that a command found in the hash
.\"O table exists before trying to execute it.  If a hashed command no
.\"O longer exists, a normal path search is performed.
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.TP 8
.B checkwinsize
.\"O If set, \fBbash\fP checks the window size after each command
.\"O and, if necessary, updates the values of
.\"O .SM
.\"O .B LINES
.\"O and
.\"O .SM
.\"O .BR COLUMNS .
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.SM
.B LINES
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.B COLUMNS
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.TP 8
.B cmdhist
.\"O If set,
.\"O .B bash
.\"O attempts to save all lines of a multiple-line
.\"O command in the same history entry.  This allows
.\"O easy re-editing of multi-line commands.
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.TP 8
.B dotglob
.\"O If set, 
.\"O .B bash
.\"O includes filenames beginning with a `.' in the results of pathname
.\"O expansion.
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.TP 8
.B execfail
.\"O If set, a non-interactive shell will not exit if
.\"O it cannot execute the file specified as an argument to the
.\"O .B exec
.\"O builtin command.  An interactive shell does not exit if
.\"O .B exec
.\"O fails.
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.B exec
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.TP 8
.B expand_aliases
.\"O If set, aliases are expanded as described above under
.\"O .SM
.\"O .BR ALIASES .
.\"O This option is enabled by default for interactive shells.
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.TP 8
.B extglob
.\"O If set, the extended pattern matching features described above under
.\"O \fBPathname Expansion\fP are enabled.
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.TP 8
.B histappend
.\"O If set, the history list is appended to the file named by the value
.\"O of the
.\"O .B HISTFILE
.\"O variable when the shell exits, rather than overwriting the file.
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.TP 8
.B histreedit
.\"O If set, and
.\"O .B readline
.\"O is being used, a user is given the opportunity to re-edit a
.\"O failed history substitution.
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.B readline
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.TP 8
.B histverify
.\"O If set, and 
.\"O .B readline
.\"O is being used, the results of history substitution are not immediately
.\"O passed to the shell parser.  Instead, the resulting line is loaded into
.\"O the \fBreadline\fP editing buffer, allowing further modification.
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.TP 8
.B hostcomplete
.\"O If set, and
.\"O .B readline
.\"O is being used, \fBbash\fP will attempt to perform hostname completion when a
.\"O word containing a \fB@\fP is being completed (see
.\"O .B Completing
.\"O under
.\"O .SM
.\"O .B READLINE
.\"O above).
.\"O This is enabled by default.
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.TP 8
.B huponexit
.\"O If set, \fBbash\fP will send
.\"O .SM
.\"O .B SIGHUP
.\"O to all jobs when an interactive login shell exits.
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.B SIGHUP
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.TP 8
.B interactive_comments
.\"O If set, allow a word beginning with
.\"O .B #
.\"O to cause that word and all remaining characters on that
.\"O line to be ignored in an interactive shell (see
.\"O .SM
.\"O .B COMMENTS
.\"O above).  This option is enabled by default.
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.B #
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.TP 8
.B lithist
.\"O If set, and the
.\"O .B cmdhist
.\"O option is enabled, multi-line commands are saved to the history with
.\"O embedded newlines rather than using semicolon separators where possible.
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.B cmdhist
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.TP 8
.B mailwarn
.\"O If set, and a file that \fBbash\fP is checking for mail has been  
.\"O accessed since the last time it was checked, the message ``The mail in
.\"O \fImailfile\fP has been read'' is displayed.
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.TP 8
.B no_empty_cmd_completion
.\"O If set, and
.\"O .B readline
.\"O is being used,
.\"O .B bash
.\"O will not attempt to search the \fBPATH\fP for possible completions when
.\"O completion is attempted on an empty line.
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.B readline
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.B bash
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.TP 8
.B nocaseglob
.\"O If set,
.\"O .B bash
.\"O matches filenames in a case\-insensitive fashion when performing pathname
.\"O expansion (see
.\"O .B Pathname Expansion
.\"O above).
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.B bash
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.TP 8
.B nullglob
.\"O If set,
.\"O .B bash
.\"O allows patterns which match no
.\"O files (see
.\"O .B Pathname Expansion
.\"O above)
.\"O to expand to a null string, rather than themselves.
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.B bash
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.TP 8
.B progcomp
.\"O If set, the programmable completion facilities (see
.\"O \fBProgrammable Completion\fP above) are enabled.
.\"O This option is enabled by default.
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.TP 8
.B promptvars
.\"O If set, prompt strings undergo variable and parameter expansion after
.\"O being expanded as described in
.\"O .SM
.\"O .B PROMPTING
.\"O above.  This option is enabled by default.
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.TP 8
.B restricted_shell
.\"O The shell sets this option if it is started in restricted mode (see
.\"O .SM
.\"O .B "RESTRICTED SHELL"
.\"O below).
.\"O The value may not be changed.
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.\"O This is not reset when the startup files are executed, allowing
.\"O the startup files to discover whether or not a shell is restricted.
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.B shift_verbose
.\"O If set, the
.\"O .B shift
.\"O builtin prints an error message when the shift count exceeds the
.\"O number of positional parameters.
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.B sourcepath
.\"O If set, the
.\"O \fBsource\fP (\fB.\fP) builtin uses the value of
.\"O .SM
.\"O .B PATH
.\"O to find the directory containing the file supplied as an argument.
.\"O This option is enabled by default.
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.B PATH
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.TP 8
.B xpg_echo
.\"O If set, the \fBecho\fP builtin expands backslash-escape sequences
.\"O by default.
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.TP
\fBsuspend\fP [\fB\-f\fP]
.\"O Suspend the execution of this shell until it receives a
.\"O .SM
.\"O .B SIGCONT
.\"O signal.  The
.\"O .B \-f
.\"O option says not to complain if this is 
.\"O a login shell; just suspend anyway.  The return status is 0 unless
.\"O the shell is a login shell and
.\"O .B \-f
.\"O is not supplied, or if job control is not enabled.
.SM
.B SIGCONT
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.PD 0
\fBtest\fP \fIexpr\fP
.TP
\fB[\fP \fIexpr\fP \fB]\fP
.\"O Return a status of 0 or 1 depending on
.\"O the evaluation of the conditional expression
.\"O .IR expr .
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.\"O Each operator and operand must be a separate argument.
.\"O Expressions are composed of the primaries described above under
.\"O .SM
.\"O .BR "CONDITIONAL EXPRESSIONS" .
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.B ¾ò·ï¼°
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.if n .sp 1
.\"O Expressions may be combined using the following operators, listed
.\"O in decreasing order of precedence.
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.PD 0
.TP
.B ! \fIexpr\fP
.\"O True if
.\"O .I expr
.\"O is false.
.I expr
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.B ( \fIexpr\fP )
.\"O Returns the value of \fIexpr\fP.
.\"O This may be used to override the normal precedence of operators.
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\fIexpr1\fP \-\fBa\fP \fIexpr2\fP
.\"O True if both
.\"O .I expr1
.\"O and
.\"O .I expr2
.\"O are true.
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\fIexpr1\fP \-\fBo\fP \fIexpr2\fP
.\"O True if either
.\"O .I expr1
.\"O or
.\"O .I expr2
.\"O is true.
.I expr1
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.\"O \fBtest\fP and \fB[\fP evaluate conditional
.\"O expressions using a set of rules based on the number of arguments.
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.PD 0
.TP
.\"O 0 arguments
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.\"O The expression is false.
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.\"O 1 argument
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.\"O The expression is true if and only if the argument is not null.
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.\"O 2 arguments
°ú¤­¿ô¤¬ 2 ¸Ä
.\"O If the first argument is \fB!\fP, the expression is true if and
.\"O only if the second argument is null.
.\"O If the first argument is one of the unary conditional operators listed above
.\"O under
.\"O .SM
.\"O .BR "CONDITIONAL EXPRESSIONS" ,
.\"O the expression is true if the unary test is true.
.\"O If the first argument is not a valid unary conditional operator, the expression
.\"O is false.
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.B ¾ò·ï¼°
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.\"O 3 arguments
°ú¤­¿ô¤¬ 3 ¸Ä
.\"O If the second argument is one of the binary conditional operators listed above
.\"O under
.\"O .SM
.\"O .BR "CONDITIONAL EXPRESSIONS" ,
.\"O the result of the expression is the result of the binary test using
.\"O the first and third arguments as operands.
.\"O If the first argument is \fB!\fP, the value is the negation of
.\"O the two-argument test using the second and third arguments.
.\"O If the first argument is exactly \fB(\fP and the third argument is
.\"O exactly \fB)\fP, the result is the one-argument test of the second
.\"O argument.
.\"O Otherwise, the expression is false.
.\"O The \fB\-a\fP and \fB\-o\fP operators are considered binary operators
.\"O in this case.  
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.TP
.\"O 4 arguments
°ú¤­¿ô¤¬ 4 ¸Ä
.\"O If the first argument is \fB!\fP, the result is the negation of
.\"O the three-argument expression composed of the remaining arguments.
.\"O Otherwise, the expression is parsed and evaluated according to 
.\"O precedence using the rules listed above.
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.\"O 5 or more arguments
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.\"O The expression is parsed and evaluated according to precedence
.\"O using the rules listed above.
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.PD
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.B times
.\"O Print the accumulated user and system times for the shell and
.\"O for processes run from the shell.  The return status is 0.
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\fBtrap\fP [\fB\-lp\fP] [\fIarg\fP] [\fIsigspec\fP ...]
.\"O The command
.\"O .I arg
.\"O is to be read and executed when the shell receives
.\"O signal(s)
.\"O .IR sigspec .
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.\"O If
.\"O .I arg
.\"O is absent or
.\"O .BR \- ,
.\"O all specified signals are
.\"O reset to their original values (the values they had
.\"O upon entrance to the shell).
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.\"O If 
.\"O .I arg
.\"O is the null string the signal specified by each
.\"O .I sigspec
.\"O is ignored by the shell and by the commands it invokes.
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.\"O If
.\"O .I arg
.\"O is not present and
.\"O .B \-p
.\"O has been supplied, then the trap commands associated with each
.\"O .I sigspec
.\"O are displayed.
.\"O If no arguments are supplied or if only
.\"O .B \-p
.\"O is given,
.\"O .B trap
.\"O prints the list of commands associated with each signal number.
.I arg
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.\"O Each
.\"O .I sigspec
.\"O is either
.\"O a signal name defined in <\fIsignal.h\fP>, or a signal number.
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.\"O If a
.\"O .I sigspec
.\"O is
.\"O .SM
.\"O .B EXIT
.\"O (0) the command
.\"O .I arg
.\"O is executed on exit from the shell.  If a
.\"O .I sigspec
.\"O is
.\"O .SM
.\"O .BR DEBUG ,
.\"O the command
.\"O .I arg
.\"O is executed after every \fIsimple command\fP (see
.\"O .SM
.\"O .B SHELL GRAMMAR
.\"O above).
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.\"O The
.\"O .B \-l
.\"O option causes the shell to print a list of signal names and
.\"O their corresponding numbers.
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.\"O Signals ignored upon entry to the shell cannot be trapped or reset.
.\"O Trapped signals are reset to their original values in a child
.\"O process when it is created.
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.\"O The return status is false if any
.\"O .I sigspec
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.\"O .B trap
.\"O returns true.
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\fBtype\fP [\fB\-atp\fP] \fIname\fP [\fIname\fP ...]
.\"O With no options, 
.\"O indicate how each
.\"O .I name
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.\"O If the
.\"O .B \-t
.\"O option is used,
.\"O .B type
.\"O prints a string which is one of
.\"O .IR alias ,
.\"O .IR keyword ,
.\"O .IR function ,
.\"O .IR builtin ,
.\"O or
.\"O .I file 
.\"O if
.\"O .I name
.\"O is an alias, shell reserved word, function, builtin, or disk file,
.\"O respectively.
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.\"O is returned.
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.\"O If the
.\"O .B \-p
.\"O option is used,
.\"O .B type
.\"O either returns the name of the disk file
.\"O that would be executed if
.\"O .I name
.\"O were specified as a command name,
.\"O or nothing if \f(CWtype -t name\fP
.\"O would not return
.\"O .IR file .
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.\"O If a command is hashed,
.\"O .B \-p
.\"O prints the hashed value, not necessarily the file that appears
.\"O first in 
.\"O .SM
.\"O .BR PATH .
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.\"O .B \-a
.\"O option is used, 
.\"O .B type
.\"O prints all of the places that contain
.\"O an executable named 
.\"O .IR name .
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.\"O This includes aliases and functions,
.\"O if and only if the 
.\"O .B \-p
.\"O option is not also used.
.B \-p
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.\"O The table of hashed commands is not consulted
.\"O when using
.\"O .BR \-a .
.\"O .B type
.\"O returns true if any of the arguments are found, false if
.\"O none are found.
.B \-a
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.B type
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.TP
\fBulimit\fP [\fB\-SHacdflmnpstuv\fP [\fIlimit\fP]]
.\"O Provides control over the resources available to the shell and to
.\"O processes started by it, on systems that allow such control.  The
.\"O value of
.\"O .I limit
.\"O can be a number in the unit specified for the resource, or the
.\"O value
.\"O .BR unlimited .
¤³¤ì¤ò»È¤¦¤È¡¢¥·¥§¥ë¤ª¤è¤Ó¥·¥§¥ë¤¬µ¯Æ°¤¹¤ë¥×¥í¥»¥¹¤¬
ÍøÍѤǤ­¤ë¥ê¥½¡¼¥¹¤òÀ©¸æ¤Ç¤­¤Þ¤¹¡£
¤¿¤À¤·¡¢¤³¤Î¤è¤¦¤ÊÀ©¸æ¤¬¤Ç¤­¤ë¥·¥¹¥Æ¥à¤Î¾ì¹ç¤Ë¸Â¤ê¤Þ¤¹¡£
.I limit
¤ÎÃͤϥ꥽¡¼¥¹¤ËÂФ·¤Æ»ØÄꤵ¤ì¤Æ¤¤¤ëñ°Ì¤Î¿ô¡¢¤Þ¤¿¤Ï
.B unlimited
¤Ç¤¹¡£
.\"O The \fB\-H\fP and \fB\-S\fP options specify that the hard or soft limit is
.\"O set for the given resource.  A hard limit cannot be increased once it
.\"O is set; a soft limit may be increased up to the value of the hard limit.
.\"O If neither \fB\-H\fP nor \fB\-S\fP is specified, both the soft and hard
.\"O limits are set.
\fB\-H\fP ¥ª¥×¥·¥ç¥ó¤È \fB\-S\fP ¥ª¥×¥·¥ç¥ó¤Ï¡¢
Í¿¤¨¤é¤ì¤¿¥ê¥½¡¼¥¹¤ËÂФ·¤Æ¶¯¤¤ (hard) À©¸Â¤ä¼å¤¤ (soft) À©¸Â¤òÀßÄꤷ¤Þ¤¹¡£
¶¯¤¤À©¸Â¤Ï°ìÅÙÀßÄꤹ¤ÈÁý¤ä¤¹¤³¤È¤¬¤Ç¤­¤Þ¤»¤ó¡£
¼å¤¤À©¸Â¤Ï¶¯¤¤À©¸Â¤ÎÃͤޤǤÏÁý¤ä¤¹¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£
\fB\-H\fP ¤È \fB\-S\fP ¤¬¤É¤Á¤é¤â»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¡¢
¶¯¤¤À©¸Â¤È¼å¤¤À©¸Â¤¬¤É¤Á¤é¤âÀßÄꤵ¤ì¤Þ¤¹¡£
.\"O If
.\"O .I limit
.\"O is omitted, the current value of the soft limit of the resource is
.\"O printed, unless the \fB\-H\fP option is given.  When more than one
.\"O resource is specified, the limit name and unit are printed before the value.
.\"O Other options are interpreted as follows:
.I limit
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¤¿¤À¤·¡¢\fB\-H\fP ¤¬Í¿¤¨¤é¤ì¤Æ¤¤¤ë¾ì¹ç¤Ï½ü¤­¤Þ¤¹¡£
Ê£¿ô¤Î¥ê¥½¡¼¥¹¤¬»ØÄꤵ¤ì¤Æ¤¤¤ë»þ¤Ï¡¢À©¸Â̾¤Èñ°Ì¤¬ÃͤÎÁ°¤Ë½ÐÎϤµ¤ì¤Þ¤¹¡£
¾¤Î¥ª¥×¥·¥ç¥ó¤Ï°Ê²¼¤Î¤è¤¦¤Ë²ò¼á¤µ¤ì¤Þ¤¹:
.RS
.PD 0
.TP
.B \-a
.\"O All current limits are reported
¸½ºß¤ÎÀ©¸Â¤òÁ´¤ÆÊó¹ð¤·¤Þ¤¹
.TP
.B \-c
.\"O The maximum size of core files created
À¸À®¤µ¤ì¤ë¥³¥¢¥Õ¥¡¥¤¥ë (core) ¤ÎºÇÂ祵¥¤¥º
.TP
.B \-d
.\"O The maximum size of a process's data segment
¥×¥í¥»¥¹¤Î¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¤ÎºÇÂ祵¥¤¥º
.TP
.B \-f
.\"O The maximum size of files created by the shell
¥·¥§¥ë¤¬À¸À®¤Ç¤­¤ë¥Õ¥¡¥¤¥ë¤ÎºÇÂ祵¥¤¥º
.TP
.B \-l
.\"O The maximum size that may be locked into memory
¥á¥â¥ê¤Ë¥í¥Ã¥¯¤Ç¤­¤ëºÇÂ祵¥¤¥º
.TP
.B \-m
.\"O The maximum resident set size
¾ïÃ󥻥åȥµ¥¤¥º¤ÎºÇÂçÃÍ
.TP
.B \-n
.\"O The maximum number of open file descriptors (most systems do not
.\"O allow this value to be set)
¥ª¡¼¥×¥ó¤Ç¤­¤ë¥Õ¥¡¥¤¥ë¥Ç¥¹¥¯¥ê¥×¥¿¤ÎºÇÂç¿ô
(¤Û¤È¤ó¤É¤Î¥·¥¹¥Æ¥à¤Ç¤Ï¡¢¤³¤ÎÃͤòÀßÄꤹ¤ë¤³¤È¤Ï¤Ç¤­¤Þ¤»¤ó)
.TP
.B \-p
.\"O The pipe size in 512-byte blocks (this may not be set)
512 ¥Ð¥¤¥È¥Ö¥í¥Ã¥¯Ã±°Ì¤Ç¤Î¥Ñ¥¤¥×¤Î¥µ¥¤¥º
(¤³¤ì¤ÏÀßÄê¤Ç¤­¤Ê¤¤¤«¤â¤·¤ì¤Þ¤»¤ó)
.TP
.B \-s
.\"O The maximum stack size
ºÇÂ祹¥¿¥Ã¥¯¥µ¥¤¥º
.TP
.B \-t
.\"O The maximum amount of cpu time in seconds
CPU »þ´Ö¤ÎºÇÂçÎÌ (ÉÃñ°Ì)
.TP
.B \-u
.\"O The maximum number of processes available to a single user
1 ¿Í¤Î¥æ¡¼¥¶¤¬»ÈÍѤǤ­¤ëºÇÂç¤Î¥×¥í¥»¥¹¿ô
.TP
.B \-v
.\"O The maximum amount of virtual memory available to the shell
¥·¥§¥ë¤¬»ÈÍѤǤ­¤ëºÇÂç¤Î²¾ÁÛ¥á¥â¥êÎÌ
.PD
.PP
.\"O If
.\"O .I limit
.\"O is given, it is the new value of the specified resource (the
.\"O .B \-a
.\"O option is display only).
.I limit
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.RB ( \-a
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.\"O If no option is given, then
.\"O .B \-f
.\"O is assumed.  Values are in 1024-byte increments, except for
.\"O .BR \-t ,
.\"O which is in seconds,
.\"O .BR \-p ,
.\"O which is in units of 512-byte blocks,
.\"O and
.\"O .B \-n
.\"O and
.\"O .BR \-u ,
.\"O which are unscaled values.  The return status is 0
.\"O unless an invalid option is encountered, a non-numeric argument
.\"O other than \fBunlimited\fP is supplied as \fIlimit\fP, or an
.\"O error occurs while setting a new limit.
¥ª¥×¥·¥ç¥ó¤¬Á´¤¯Í¿¤¨¤é¤ì¤Ê¤«¤Ã¤¿¾ì¹ç¤Ï¡¢
.B \-f
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ÃÍ¤Ï 1024 ¥Ð¥¤¥Èñ°Ì¤ÇÁý¤¨¤Þ¤¹¤¬¡¢
ÉÃñ°Ì¤Ç¤¢¤ë
.BR \-t ,
512 ¥Ð¥¤¥È¤Î¥Ö¥í¥Ã¥¯Ã±°Ì¤Ç¤¢¤ë
.BR \-p ,
ñ°Ì̵¤·¤ÎÃͤǤ¢¤ë
.B \-n
¤ª¤è¤Ó
.B \-u
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ÉÔÀµ¤Ê¥ª¥×¥·¥ç¥ó¤¬¤¢¤ë¾ì¹ç¡¢
\fBunlimited\fP °Ê³°¤Î¿ô»ú¤Ç¤Ê¤¤°ú¤­¿ô¤¬ \fIlimit\fP ¤Ë»ØÄꤵ¤ì¤¿¾ì¹ç¡¢
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.RE
.TP
\fBumask\fP [\fB\-p\fP] [\fB\-S\fP] [\fImode\fP]
.\"O The user file-creation mask is set to 
.\"O .IR mode .
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.IR mode
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.\"O If
.\"O .I mode
.\"O begins with a digit, it
.\"O is interpreted as an octal number; otherwise
.\"O it is interpreted as a symbolic mode mask similar
.\"O to that accepted by
.\"O .IR chmod (1).
.I mode
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.IR chmod (1)
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.\"O If
.\"O .I mode
.\"O is omitted, the current value of the mask is printed.
.I mode
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.\"O The
.\"O .B \-S
.\"O option causes the mask to be printed in symbolic form; the
.\"O default output is an octal number.
.B \-S
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.\"O If the
.\"O .B \-p
.\"O option is supplied, and
.\"O .I mode
.\"O is omitted, the output is in a form that may be reused as input.
.\"O The return status is 0 if the mode was successfully changed or if
.\"O no \fImode\fP argument was supplied, and false otherwise.
.B \-p
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.I mode
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\fImode\fP °ú¤­¿ô¤¬Á´¤¯Í¿¤¨¤é¤ì¤Ê¤«¤Ã¤¿¾ì¹ç¤Ë¤Ï¡¢
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.TP
\fBunalias\fP [\-\fBa\fP] [\fIname\fP ...]
.\"O Remove each \fIname\fP from the list of defined aliases.  If
.\"O .B \-a
.\"O is supplied, all alias definitions are removed.  The return
.\"O value is true unless a supplied
.\"O .I name
.\"O is not a defined alias.
\fIname\fP ¤òÄêµÁ¤µ¤ì¤Æ¤¤¤ë¥¨¥¤¥ê¥¢¥¹¤Î¥ê¥¹¥È¤«¤éºï½ü¤·¤Þ¤¹¡£
.B \-a
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Í¿¤¨¤é¤ì¤¿
.I name
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.TP
\fBunset\fP [\-\fBfv\fP] [\fIname\fP ...]
.\"O For each
.\"O .IR name ,
.\"O remove the corresponding variable or function.
.IR name
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.\"O If no options are supplied, or the
.\"O .B \-v
.\"O option is given, each
.\"O .I name
.\"O refers to a shell variable.
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.B \-v
¥ª¥×¥·¥ç¥ó¤¬Í¿¤¨¤é¤ì¤¿¾ì¹ç¤Ï¡¢³Æ
.I name
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.\"O Read-only variables may not be unset.
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.\"O If
.\"O .B \-f
.\"O is specifed, 
.\"O each
.\"O .I name
.\"O refers to a shell function, and the function definition
.\"O is removed.
.B \-f
¤¬»ØÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç¡¢³Æ
.I name
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.\"O Each unset variable or function is removed from the environment
.\"O passed to subsequent commands.
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.\"O If any of
.\"O .SM
.\"O .BR RANDOM ,
.\"O .SM
.\"O .BR SECONDS ,
.\"O .SM
.\"O .BR LINENO ,
.\"O .SM
.\"O .BR HISTCMD ,
.\"O .SM
.\"O .BR FUNCNAME ,
.\"O .SM
.\"O .BR GROUPS ,
.\"O or
.\"O .SM
.\"O .B DIRSTACK
.\"O are unset, they lose their special properties, even if they are
.\"O subsequently reset.  The exit status is true unless a
.\"O .I name
.\"O does not exist or is readonly.
.SM
.BR RANDOM ,
.SM
.BR SECONDS ,
.SM
.BR LINENO ,
.SM
.BR HISTCMD ,
.SM
.BR FUNCNAME ,
.SM
.BR GROUPS ,
.SM
.B DIRSTACK
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.I name
¤¬Â¸ºß¤·¤Ê¤¤¤«¡¢Æɤ߹þ¤ßÀìÍѤξì¹ç°Ê³°¤Ë¤Ï¡¢
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.TP
\fBwait\fP [\fIn\fP]
.\"O Wait for the specified process and return its termination
.\"O status.
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.\"O .I n
.\"O may be a process
.\"O ID or a job specification; if a job spec is given, all processes
.\"O in that job's pipeline are waited for.  If
.\"O .I n
.\"O is not given, all currently active child processes
.\"O are waited for, and the return status is zero.  If
.\"O .I n
.\"O specifies a non-existent process or job, the return status is
.\"O 127.  Otherwise, the return status is the exit status of the last
.\"O process or job waited for.
.I n
¤Ï¥×¥í¥»¥¹ ID ¤Þ¤¿¤Ï¥¸¥ç¥Ö»ØÄê¤Ç¤¹¡£
¥¸¥ç¥Ö»ØÄê¤òÍ¿¤¨¤¿¾ì¹ç¡¢¤½¤Î¥¸¥ç¥Ö¤Î¥Ñ¥¤¥×¥é¥¤¥ó¤Ë´Þ¤Þ¤ì¤ë
Á´¤Æ¤Î¥×¥í¥»¥¹¤ò wait ¤·¤Þ¤¹¡£
.I n
¤¬Í¿¤¨¤é¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¤Ë¤Ï¡¢¸½ºß¥¢¥¯¥Æ¥£¥Ö¤ÊÁ´¤Æ¤Î»Ò¥×¥í¥»¥¹¤ò wait ¤·¡¢
Êֵѥ¹¥Æ¡¼¥¿¥¹¤Ï 0 ¤È¤Ê¤ê¤Þ¤¹¡£
.I n
¤¬Â¸ºß¤·¤Ê¤¤¥×¥í¥»¥¹¤ä¥¸¥ç¥Ö¤ò»ØÄꤷ¤Æ¤¤¤ë¾ì¹ç¡¢
Êֵѥ¹¥Æ¡¼¥¿¥¹¤Ï 127 ¤Ë¤Ê¤ê¤Þ¤¹¡£
¤½¤ì°Ê³°¤Î¾ì¹ç¡¢Êֵѥ¹¥Æ¡¼¥¿¥¹¤Ï
wait ¤·¤Æ¤¤¤¿ºÇ¸å¤Î¥×¥í¥»¥¹¤Þ¤¿¤Ï¥¸¥ç¥Ö¤Î½ªÎ»¥¹¥Æ¡¼¥¿¥¹¤È¤Ê¤ê¤Þ¤¹¡£
.\" bash_builtins
.if \n(zZ=1 .ig zZ