NAME

     getsid - get session ID

SYNOPSIS

     #include <unistd.h>

     pid_t getsid(pid_t pid));

DESCRIPTION

     getsid(0) returns the session ID  of  the  calling  process.
     getsid(p) returns the session ID of the process with process
     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).