setpgrp(3p) — Linux manual page

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

PROLOG         top

       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.

NAME         top

       setpgrp — set the process group ID

SYNOPSIS         top

       #include <unistd.h>

       pid_t setpgrp(void);

DESCRIPTION         top

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

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

RETURN VALUE         top

       Upon completion, setpgrp() shall return the process group ID.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

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

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       The setpgrp() function may be removed in a future version.

SEE ALSO         top

       exec(1p), fork(3p), getpid(3p), getsid(3p), kill(3p),
       setpgid(3p), setsid(3p)

       The Base Definitions volume of POSIX.1‐2017, unistd.h(0p)

COPYRIGHT         top

       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                       SETPGRP(3P)

Pages that refer to this page: unistd.h(0p),  setsid(3p)

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