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OpenDarwin 7.2.1 - man page for _exit (opendarwin section 2)

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EXIT(2) 			     BSD System Calls Manual				  EXIT(2)

NAME
     _exit -- terminate the calling process

SYNOPSIS
     #include <unistd.h>

     void
     _exit(int status);

DESCRIPTION
     The _exit() function terminates a process with the following consequences:

     o	 All of the descriptors open in the calling process are closed.  This may entail delays,
	 for example, waiting for output to drain; a process in this state may not be killed, as
	 it is already dying.

     o	 If the parent process of the calling process has an outstanding wait call or catches the
	 SIGCHLD signal, it is notified of the calling process's termination and the status is
	 set as defined by wait(2).

     o	 The parent process-ID of all of the calling process's existing child processes are set
	 to 1; the initialization process (see the DEFINITIONS section of intro(2)) inherits each
	 of these processes.

     o	 If the termination of the process causes any process group to become orphaned (usually
	 because the parents of all members of the group have now exited; see ``orphaned process
	 group'' in intro(2)), and if any member of the orphaned group is stopped, the SIGHUP
	 signal and the SIGCONT signal are sent to all members of the newly-orphaned process
	 group.

     o	 If the process is a controlling process (see intro(2)), the SIGHUP signal is sent to the
	 foreground process group of the controlling terminal, and all current access to the con-
	 trolling terminal is revoked.

     Most C programs call the library routine exit(3), which flushes buffers, closes streams,
     unlinks temporary files, etc., before calling _exit().

RETURN VALUE
     _exit() can never return.

SEE ALSO
     fork(2), sigaction(2), wait(2), exit(3)

STANDARDS
     The _exit function is defined by IEEE Std 1003.1-1988 (``POSIX.1'').

4th Berkeley Distribution		   June 4, 1993 		4th Berkeley Distribution
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