Section: POSIX Programmer's Manual (1P)
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
--- return true value
utility shall return with exit code zero.
CONSEQUENCES OF ERRORS
The following sections are informative.
This utility is typically used in shell scripts, as shown in the
EXAMPLES section. The special built-in utility
is sometimes more efficient than
This command is executed forever:
utility has been retained in this volume of POSIX.1-2008, even though the shell special
provides similar functionality, because
is widely used in historical scripts and is less cryptic to novice
, Shell Commands,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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
Any typographical or formatting errors that appear
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