exit(2) 							System Calls Manual							   exit(2)

NAME

       exit(), _exit(), _Exit() - terminate a process

SYNOPSIS


   Parameters
	      status	The  values  of  status can be or as described in or any other value, although only the least significant 8 bits (that is,
			status is available to a waiting parent process.

DESCRIPTION

       The function first calls all functions registered by in the reverse order of their registration.  Each function is called as many times	as
       it  was	registered.   If a function registered by a call to fails to return, the remaining registered functions are called and the rest of
       the processing is not completed.  terminates the calling process and passes status to the system for inspection {see  wait(2)}.	 Returning
       from  main  in  a C program has the same effect as the status value is the function value returned by main (this value is undefined if main
       does not take care to return a value or to call explicitly).

       If the calling process is multithreaded, all threads/lightweight process in the process will be terminated.

       cannot return to its caller.  The result of an call during exit processing is undefined.

       The functions and are equivalent, except that calls functions registered by and flushes standard I/O buffers, while does not.

       The function is equivalent to

       The functions and terminate the calling process with the following consequences.  The exact order of these consequences is unspecified.

	      All file descriptors, directory streams, conversion descriptors, and message catalog descriptors open in	the  calling  process  are
	      closed.

	      All files created by are removed (see tmpfile(3S)).

	      If  the  parent  process	of the calling process is executing a or it is notified of the calling process's termination, and the low-
	      order eight bits; i.e., bits 0377 of status are made available to it (see wait(2)).

	      If the parent process of the calling process is not executing a or and does not have set to 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.  Time accounting information is recorded for use by (see times(2)).

	      The parent process ID is set to the process ID of the initialization process (aka for all of the calling	process's  existing  child
	      processes and zombie processes.  This means the initialization process inherits each of these processes.

	      Threads/LWPs  terminated	by a call to shall not invoke their cancellation cleanup handlers or their thread specific data destructor
	      functions.

	      Each attached shared memory segment is detached and the value of in the data structure associated with its shared memory	identifier
	      is decremented by 1 (see shmop(2)).

	      For  each  semaphore for which the calling process has set a semadj value (see semop(2)), that semadj value is added to the value of
	      the specified semaphore.

	      If the process has a process, text, or data lock, an is performed, see plock(2).

	      An accounting record is written on the accounting file if the system's accounting routine is enabled (see acct(2)).

	      A signal is sent to the parent process.

	      If the calling process is a controlling process, the signal is sent to each process in the foreground process group of the  control-
	      ling terminal belonging to the calling process.  The controlling terminal associated with the session is disassociated from the ses-
	      sion, allowing it to be acquired by a new controlling process.

	      If the exit of the calling process causes a process group to become orphaned, and if any member of the newly-orphaned process  group
	      is stopped, all processes in the newly-orphaned process group are sent and signals.

	      If the current process has any child processes that are being traced, they are sent a signal.

AUTHOR

       was developed by HP, AT&T, and the University of California, Berkeley.  and were developed by HP.

SEE ALSO

       sh(1),  acct(2),  close(2),  plock(2),  semop(2),  shmget(2),  shmop(2),  sigaction(2),	times(2),  vfork(2), wait(2), wait3(2), waitpid(2)
       atexit(3), fclose(3), pthread_cancel(3T), pthread_exit(3T), pthread_key_create(3T), signal(5).

       See exit conditions

STANDARDS CONFORMANCE

																	   exit(2)