Section: Linux Programmer's Manual (2)
Return to Main Contents
getsid - get session ID
pid_t getsid(pid_t pid);
returns the session ID of the calling process.
returns the session ID of the process with process ID
(The session ID of a process is the process group ID of the
On error, (pid_t) -1 will be returned, and
is set appropriately.
A process with process ID
exists, but it is not in the same session as the current process,
and the implementation considers this an error.
No process with process ID
Linux does not return EPERM.
Linux has this system call since Linux 1.3.44.
There is libc support since libc 5.2.19.
To get the prototype under glibc, define both _XOPEN_SOURCE and
_XOPEN_SOURCE_EXTENDED, or use "#define _XOPEN_SOURCE n"
for some integer n larger than or equal to 500.
- CONFORMING TO
- SEE ALSO
linux.jgfs.net manual pages