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OpenSolaris 2009.06 - man page for builtin (opensolaris section 1)

builtin(1)				  User Commands 			       builtin(1)

NAME
       builtin - ksh93 built-in function to add, delete, or display shell built-ins

SYNOPSIS
       builtin [-ds] [-f lib] [pathname ...]

DESCRIPTION
       The  ksh93  builtin  command  adds,  deletes, or displays built-in commands in the current
       shell environment. A built-in command executes in the current shell process and	can  have
       side  effects in the current shell. On most systems, the invocation time for built-in com-
       mands is one or two orders of magnitude less than commands that create a separate process.

       For each pathname specified, the basename of the  pathname  determines  the  name  of  the
       built-in.  For  each basename, the shell looks for a C level function in the current shell
       whose name is determined by pre-pending b_ to the built-in name. If  pathname  contains	a
       forward	slash  (/),  the built-in is bound to pathname. A built-in bound to a pathname is
       only executed if pathname is the first executable found during a path  search.  Otherwise,
       built-ins are found prior to performing the path search.

       If  pathname is not specified, builtin displays the current list of built-ins, or just the
       special built-ins if the -s option is specified, on standard output. The full pathname for
       built-ins that are bound to pathnames are displayed.

       Libraries  containing  built-ins  can be specified with the -f option. If the library con-
       tains a function named lib_init(), this function is  invoked  with  argument  0	when  the
       library is loaded. The lib_init() function can load built-ins by invoking an appropriate C
       level function. In this case there is no restriction on the C level function name.

       The C level function is invoked with three arguments. The first two are the same as main()
       and the third one is a pointer.

       The ksh93 builtin command cannot be invoked from a restricted shell.

OPTIONS
       The following options are supported:

       -d	 Delete each of the specified built-ins. Special built-ins cannot be deleted.

       -f lib	 On  systems  with  dynamic  linking, load and search for built-ins in the shared
		 library, lib.

		 Libraries are searched for in $PATH and system  dependent  library  directories.
		 The  system  dependent  shared  library  prefix or suffix can be omitted. Once a
		 library is loaded, its symbols become available for the current  and  subsequent
		 invocations  of builtin. Multiple libraries can be specified with separate invo-
		 cations of builtin. Libraries are searched in the reverse order  in  which  they
		 are specified.

       -s	 Display only the special built-ins.

OPERANDS
       The following operands are supported:

       pathname    Specifies  the  pathname.  The basename of the pathname determines the name of
		   the built-in.

EXIT STATUS
       The following exit values are returned:

       0     Successful completion.

       >0    An error occurred.

EXAMPLES
       Example 1 Loading a builtin Command

       The following example loads a builtin command mycmd from the library libfoo.so:

	 example% builtin -f foo mycmd

AUTHORS
       David Korn, dgk@research.att.com

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

SEE ALSO
       ksh93(1), whence(1), attributes(5)

SunOS 5.11				    1 May 2007				       builtin(1)


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