getsid(2)                      DG/UX 5.4R3.00                      getsid(2)


NAME
       getsid - get session ID

SYNOPSIS
       #include <sys/types.h>
       #include <unistd.h>

       pidt getsid (pidt pid)

   where:
       pid    A process identifier

DESCRIPTION
       The function getsid returns the session ID of the process whose
       process ID is equal to pid.  If pid is equal to (pidt)0, getsid
       returns the session ID of the calling process.

RETURN VALUE
       Upon successful completion, the function getsid returns the session
       ID of the specified process; otherwise, it returns a value of
       (pidt)-1 and sets errno to indicate an error.

ACCESS CONTROL
       No access checking is performed.

DIAGNOSTICS
       Under the following conditions, the function getsid fails and sets
       errno to:

       ESRCH     if there is no process with a process ID equal to pid.

SEE ALSO
       exec(2), fork(2), getpid(2), setpgid(2), setsid(2).
























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