getsid(S)
getsid --
get session ID
Synopsis
#include <sys/types.h>
#include <unistd.h>
pid_t getsid(pid_t pid);
Description
The function getsid returns the session ID of the process whose process
ID is equal to pid.
If pid is equal to (pid_t)0, getsid
returns the session ID of the calling process.
Return values
On success, getsid returns the session ID of the specified process.
On failure, getsid returns (pid_t)-1 and sets errno
to identify the error.
Errors
In the following conditions, getsid fails and sets errno to:
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 session ID of that process from the calling
process.
ESRCH-
There is no process with a process ID equal to pid.
References
exec(S),
fork(S),
getpid(S),
setpgid(S),
setsid(S)
Notices
Considerations for threads programming
These ID numbers are attributes of the containing process
and are shared by sibling threads.
© 2005 The SCO Group, Inc. All rights reserved.
SCO OpenServer Release 6.0.0 - 01 June 2005