Originální popis anglicky:
true - return true value
Návod, kniha: POSIX Programmer's Manual
true
The
true utility shall return with exit code zero.
None.
None.
Not used.
None.
None.
Default.
Not used.
Not used.
None.
None.
Zero.
None.
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
true.
This command is executed forever:
while true
do
command
done
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.
None.
false ,
Shell Commands
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- 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
.
