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GETPGID(3P) POSIX Programmer's Manual GETPGID(3P)
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.
getpgid — get the process group ID for a process
#include <unistd.h>
pid_t getpgid(pid_t pid);
The getpgid() function shall return the process group ID of the
process whose process ID is equal to pid. If pid is equal to 0,
getpgid() shall return the process group ID of the calling process.
Upon successful completion, getpgid() shall return a process group
ID. Otherwise, it shall return (pid_t)−1 and set errno to indicate
the error.
The getpgid() function shall fail if:
EPERM The process whose process ID is equal to pid is not in the
same session as the calling process, and the implementation
does not allow access to the process group ID of that process
from the calling process.
ESRCH There is no process with a process ID equal to pid.
The getpgid() function may fail if:
EINVAL The value of the pid argument is invalid.
The following sections are informative.
None.
None.
None.
None.
exec(1p), fork(3p), getpgrp(3p), getpid(3p), getsid(3p), setpgid(3p),
setsid(3p)
The Base Definitions volume of POSIX.1‐2008, unistd.h(0p)
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 GETPGID(3P)
Pages that refer to this page: unistd.h(0p), getpgrp(3p), getppid(3p), getsid(3p), killpg(3p)