suse man page for true

TRUE(1P)						     POSIX Programmer's Manual							  TRUE(1P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       true - return true value

SYNOPSIS
       true

DESCRIPTION
       The true utility shall return with exit code zero.

OPTIONS
       None.

OPERANDS
       None.

STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       None.

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       Not used.

STDERR
       Not used.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       Zero.

CONSEQUENCES OF ERRORS
       None.

       The following sections are informative.

APPLICATION USAGE
       This utility is typically used in shell scripts, as shown in the EXAMPLES section. The special built-in utility : is sometimes  more  effi-
       cient than true.

EXAMPLES
       This command is executed forever:

	      while true
	      do
		  command
	      done

RATIONALE
       The  true utility has been retained in this volume of IEEE Std 1003.1-2001, even though the shell special built-in : provides similar func-
       tionality, because true is widely used in historical scripts and is less cryptic to novice script readers.

FUTURE DIRECTIONS
       None.

SEE ALSO
       false, Shell Commands

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								  TRUE(1P)