man/cat1p/true.1p.txt
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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) |