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

true(1) 							   User Commands							   true(1)

NAME
true, false - provide truth values
SYNOPSIS
true false
DESCRIPTION
The true utility does nothing, successfully. The false utility does nothing, unsuccessfully. They are typically used in a shell script sh as: while true do command done which executes command forever.
EXIT STATUS
true has exit status 0. false always will exit with a non-zero value.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+
SEE ALSO
sh(1), attributes(5), standards(5) SunOS 5.11 1 Feb 1995 true(1)