NAME
getsid —
get process session
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<unistd.h>
pid_t
getsid(pid_t pid);
DESCRIPTION
The session ID of the process identified by
pid is returned by
getsid().
If pid is zero, getsid()
returns the session ID of the current process.
RETURN VALUES
Upon successful completion, the function
getsid() returns the session ID of the specified
process; otherwise, it returns a value of -1 and sets errno to indicate an
error.
ERRORS
The getsid() system call will fail if:
- [
ESRCH] - There is no process with a process ID equal to pid.
Note that an implementation may restrict this function call to processes within the same session ID as the calling process.
SEE ALSO
HISTORY
The getsid() function call appeared in
FreeBSD 3.0. The getsid()
function call is derived from its usage in AT&T
System V UNIX.