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+true(P) true(P)
+
+
+
+
+
+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 efficient 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 functionality, 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 Technology -- Portable Operat-
+ ing System Interface (POSIX), The Open Group Base Speci-
+ fications Issue 6, Copyright (C) 2001-2003 by the Insti-
+ tute 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.open-
+ group.org/unix/online.html .
+
+
+
+POSIX 2003 true(P)