getpgrp - Man Page

get the process group ID of the calling process


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.


#include <unistd.h>

pid_t getpgrp(void);


The getpgrp() function shall return the process group ID of the calling process.

Return Value

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.



Application Usage



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 getpgid().

Future Directions


See Also

exec, fork(), getpgid(), getpid(), getppid(), kill(), setpgid(), setsid()

The Base Definitions volume of POSIX.1-2017, <sys_types.h>, <unistd.h>

Referenced By

getpgid(3p), getpid(3p), getppid(3p), setpgid(3p), unistd.h(0p).

2017 IEEE/The Open Group POSIX Programmer's Manual