TRUE(1)                    POSIX Programmer's Manual                   TRUE(1)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       true -- return true value

SSYYNNOOPPSSIISS
       true

DDEESSCCRRIIPPTTIIOONN
       The _t_r_u_e utility shall return with exit code zero.

OOPPTTIIOONNSS
       None.

OOPPEERRAANNDDSS
       None.

SSTTDDIINN
       Not used.

IINNPPUUTT FFIILLEESS
       None.

EENNVVIIRROONNMMEENNTT VVAARRIIAABBLLEESS
       None.

AASSYYNNCCHHRROONNOOUUSS EEVVEENNTTSS
       Default.

SSTTDDOOUUTT
       Not used.

SSTTDDEERRRR
       Not used.

OOUUTTPPUUTT FFIILLEESS
       None.

EEXXTTEENNDDEEDD DDEESSCCRRIIPPTTIIOONN
       None.

EEXXIITT SSTTAATTUUSS
       Zero.

CCOONNSSEEQQUUEENNCCEESS OOFF EERRRROORRSS
       None.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       This utility is typically used in shell scripts, as shown in the
       EXAMPLES section. The special built-in utility :: is sometimes more
       efficient than _t_r_u_e.

EEXXAAMMPPLLEESS
       This command is executed forever:


           while true
           do
               command
           done

RRAATTIIOONNAALLEE
       The _t_r_u_e utility has been retained in this volume of POSIX.1-2017, even
       though the shell special built-in :: provides similar functionality,
       because _t_r_u_e is widely used in historical scripts and is less cryptic
       to novice script readers.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _S_e_c_t_i_o_n _2_._9, _S_h_e_l_l _C_o_m_m_a_n_d_s, _f_a_l_s_e

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017                              TRUE(1)
