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EXIT(2)			  FreeBSD System Calls Manual		       EXIT(2)

NAME
     _exit -- terminate	the calling process

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <unistd.h>

     void
     _exit(int status);

DESCRIPTION
     The _exit() system	call terminates	a process with the following conse-
     quences:

     +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(2) 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 inherits each of
	 these processes (see init(8) and the DEFINITIONS section of
	 intro(2)).

     +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 controlling 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 VALUES
     The _exit() system	call can never return.

SEE ALSO
     fork(2), sigaction(2), wait(2), exit(3), init(8)

STANDARDS
     The _exit() system	call is	expected to conform to ISO/IEC 9945-1:1990
     (``POSIX.1'').

HISTORY
     The _exit() function appeared in Version 7	AT&T UNIX.

FreeBSD	9.2			 June 4, 1993			   FreeBSD 9.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS | HISTORY

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