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GETSID(3P) POSIX Programmer's Manual GETSID(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.
getsid — get the process group ID of a session leader
#include <unistd.h>
pid_t getsid(pid_t pid);
The getsid() function shall obtain the process group ID of the
process that is the session leader of the process specified by pid.
If pid is (pid_t)0, it specifies the calling process.
Upon successful completion, getsid() shall return the process group
ID of the session leader of the specified process. Otherwise, it
shall return −1 and set errno to indicate the error.
The getsid() function shall fail if:
EPERM The process specified by pid is not in the same session as the
calling process, and the implementation does not allow access
to the process group ID of the session leader of that process
from the calling process.
ESRCH There is no process with a process ID equal to pid.
The following sections are informative.
None.
None.
None.
None.
exec(1p), fork(3p), getpid(3p), getpgid(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 GETSID(3P)
Pages that refer to this page: unistd.h(0p), getpgid(3p), setpgrp(3p), setsid(3p)