getpid(2)                                                  getpid(2)


       NAME
             getpid, getpgrp, getppid, getpgid - get process, process
             group, and parent process IDs

       SYNOPSIS
             #include <sys/types.h>
             #include <unistd.h>
             pid_t getpid(void);
             pid_t getpgrp(void);
             pid_t getppid(void);
             pid_t getpgid(pid_t pid);

       DESCRIPTION
             getpid returns the process ID of the calling process.

             getpgrp returns the process group ID of the calling process.

             getppid returns the parent process ID of the calling process.

             getpgid returns the process group ID of the process whose
             process ID is equal to pid, or the process group ID of the
             calling process, if pid is equal to zero.

          Return Values
             On success, getpgid returns a process group ID.  On failure,
             getpgid returns (pid_t) -1 and sets errno to identify the
             error.

          Errors
             In the following conditions, getpgid 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 process group ID of that process from the
                            calling process.

             ESRCH          There is no process with a process ID equal to
                            pid.

       REFERENCES
             exec(2), fork(2), getsid(2), intro(2), setpgid(2), setpgrp(2),
             setsid(2), signal(2)





                           Copyright 1994 Novell, Inc.               Page 1

      getpid(2)                                                  getpid(2)


      NOTICES
         Considerations for Threads Programming
            These ID numbers are attributes of the containing process and
            are shared by sibling threads.












































                          Copyright 1994 Novell, Inc.               Page 2