Poster of Linux kernelThe best gift for a Linux geek
GETSID

GETSID

Section: Linux Programmer's Manual (2) Updated: 2010-09-20
Local index Up
 

NAME

getsid - get session ID  

SYNOPSIS

#include <unistd.h>

pid_t getsid(pid_t pid);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

getsid():

Since glibc 2.12:
_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
Before glibc 2.12:
_XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
 

DESCRIPTION

getsid(0) returns the session ID of the calling process. getsid(p) returns the session ID of the process with process ID p. (The session ID of a process is the process group ID of the session leader.)  

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 p 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 p was found.
 

VERSIONS

This system call is available on Linux since version 2.0.  

CONFORMING TO

SVr4, POSIX.1-2001.  

NOTES

Linux does not return EPERM.  

SEE ALSO

getpgid(2), setsid(2), credentials(7)  

COLOPHON

This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
VERSIONS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

This document was created by man2html, using the manual pages.
Time: 21:08:59 GMT, April 16, 2011