EXIT(S)                  XENIX System V                   EXIT(S)



     Name
          exit, _exit - Terminates a process.

     Syntax
          exit (status)
          void int status;
          void _exit (status)
          int status;

     Description
          exit terminates the calling process.  All of the file
          descriptors open in the calling process are closed.

          If the parent process of the calling process is executing a
          wait, it is notified of the calling process' termination and
          the low-order 8 bits (i.e., bits 0377) of status are made
          available to it; see wait(S).  If the parent is not waiting,
          the child's status will be made available to it when the
          parent subsequently executes wait(S).

          If the parent process of the calling process is not
          executing a wait, the calling process is transformed into a
          ``zombie process.'' A zombie process is a process that only
          occupies a slot in the process table, it has no other space
          allocated either in user or kernel space.  The process table
          slot that it occupies is partially overlaid with time
          accounting information (see <sys/proc.h>) to be used by
          times(S).

          The parent process ID of all of the calling process'
          existing child processes  and zombie processes is set to 1.
          This means the initialization process (see intro(S))
          inherits each of these processes.

          Each attached shared memory segment is detached and the
          value of shm_nattach in the data structure associated with
          its shared memory identifier is decremented by 1.

          For each semaphore for which the calling process has set a
          semadj value (see semop(S)), that semadj value is added to
          the semval of the specified semaphore.

          If the process has a text, data lock, or process, an unlock
          is performed (see plock(S)).

          An accounting record is written on the accounting file if
          the system's accounting routine is enabled; see acct(S).








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     EXIT(S)                  XENIX System V                   EXIT(S)



          If the process ID, TTY group ID, and process group ID of the
          calling process are equal, the SIGHUP signal is sent to each
          of the processes that has a process group ID equal to that
          of the calling process.

          The C function exit may cause cleanup actions before the
          process exits. The _exit circumvents all cleanup.

     See Also
          acct(S), intro(S), plock(S), semop(S), signal(S), wait(S)

     Warning
          See Warning in signal(S)










































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