exit man page on HP-UX

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exit(2)								       exit(2)

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


	      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

       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 pro‐
       cessing is undefined.

       The functions and are equivalent, except that  calls  functions	regis‐
       tered 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 con‐
       sequences.  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

	      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	avail‐
	      able 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  initial‐
	      ization  process	(aka for all of the calling process's existing
	      child processes and zombie processes.  This means	 the  initial‐
	      ization process inherits each of these processes.

	      Threads/LWPs terminated by a call to shall not invoke their can‐
	      cellation	 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  identi‐
	      fier 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 per‐
	      formed, 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 con‐
	      trolling	terminal  belonging  to the calling process.  The con‐
	      trolling terminal associated with the session  is	 disassociated
	      from  the	 session, allowing it to be acquired by a new control‐
	      ling 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.

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

       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


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