Section (2) getsid
Name
getsid — get session ID
Synopsis
#include <sys/types.h> #include <unistd.h>
pid_t
getsid( |
pid_t pid) ; |
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DESCRIPTION
getsid(0)
returns the session ID of the calling process. getsid
() returns the session ID of the
process with process ID pid
. If pid
is 0, getsid
() returns the session ID of the
calling process.
RETURN VALUE
On success, a session ID is returned. On error,
(pid_t) −1 will
be returned, and errno
is set
appropriately.
ERRORS
- EPERM
-
A process with process ID
pid
exists, but it is not in the same session as the calling process, and the implementation considers this an error. - ESRCH
-
No process with process ID
pid
was found.
NOTES
Linux does not return EPERM.
See credentials(7) for a description of sessions and session IDs.
COLOPHON
This page is part of release 4.16 of the Linux man-pages
project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
Copyright (C) 1996 Andries Brouwer (aebcwi.nl) and Copyright (C) 2016 Michael Kerrisk <mtk.manpagesgmail.com> %%%LICENSE_START(GPLv2+_DOC_FULL) This is free documentation; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU General Public License_zsingle_quotesz_s references to object code and executables are to be interpreted as the output of any document formatting or typesetting system, including intermediate and printed output. This manual is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this manual; if not, see <http://www.gnu.org/licenses/>. %%%LICENSE_END Modified Thu Oct 31 14:18:40 1996 by Eric S. Raymond <esry hyrsus.com> Modified 2001-12-17, aeb |