GETSID(2)

NAME
       getsid - get session ID

SYNOPSIS
       #include <<unistd.h>>

       pid_t getsid(void);

DESCRIPTION
       getsid(0)  returns  the session ID of the calling process.
       getsid(p) returns the session ID of the process with  pro-
       cess ID p.

ERRORS
       On  error,  -1 will be returned.  The only error which can
       happen is ESRCH, when no process with  process  ID  p  was
       found.

CONFORMING TO
       SVr4, which documents an additional EPERM error condition.

SEE ALSO
       setsid(2).