SETPGRP(3)                 POSIX Programmer's Manual                SETPGRP(3)



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
       setpgrp -- set the process group ID

SSYYNNOOPPSSIISS
       #include <unistd.h>

       pid_t setpgrp(void);

DDEESSCCRRIIPPTTIIOONN
       If the calling process is not already a session leader, _s_e_t_p_g_r_p() sets
       the process group ID of the calling process to the process ID of the
       calling process. If _s_e_t_p_g_r_p() creates a new session, then the new
       session has no controlling terminal.

       The _s_e_t_p_g_r_p() function has no effect when the calling process is a
       session leader.

RREETTUURRNN VVAALLUUEE
       Upon completion, _s_e_t_p_g_r_p() shall return the process group ID.

EERRRROORRSS
       No errors are defined.

       _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_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       It is unspecified whether this function behaves as _s_e_t_p_g_i_d(0,0) or
       _s_e_t_s_i_d() unless the process is already a session leader. Therefore,
       applications are encouraged to use _s_e_t_p_g_i_d() or _s_e_t_s_i_d() as
       appropriate.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       The _s_e_t_p_g_r_p() function may be removed in a future version.

SSEEEE AALLSSOO
       _e_x_e_c, _f_o_r_k(), _g_e_t_p_i_d(), _g_e_t_s_i_d(), _k_i_l_l(), _s_e_t_p_g_i_d(), _s_e_t_s_i_d()

       The Base Definitions volume of POSIX.1-2008, <<uunniissttdd..hh>>

CCOOPPYYRRIIGGHHTT
       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 http://www.unix.org/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                  2013                           SETPGRP(3)
