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.
getpgrp — get the process group ID of the calling process
The getpgrp() function shall return the process group ID of the calling
The getpgrp() function shall always be successful and no return value is
reserved to indicate an error.
No errors are defined.
The following sections are informative.
4.3 BSD provides a getpgrp() function that returns the process group ID
for a specified process. Although this function supports job control, all
known job control shells always specify the calling process with this
function. Thus, the simpler System V getpgrp() suffices, and the added
complexity of the 4.3 BSD getpgrp() is provided by the XSI extension
exec, fork(), getpgid(),
getpid(), getppid(), kill(),
The Base Definitions volume of POSIX.1‐2017,
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 .
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