1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: src/lib/libc/stdlib/exit.c,v 1.3.6.1 2001/03/05 11:33:57 obrien Exp $ 34 * $DragonFly: src/lib/libc/stdlib/exit.c,v 1.3 2003/09/06 08:10:46 asmodai Exp $ 35 * 36 * @(#)exit.c 8.1 (Berkeley) 6/4/93 37 */ 38 39 #include <stdlib.h> 40 #include <unistd.h> 41 #include "atexit.h" 42 43 void (*__cleanup)(); 44 45 /* 46 * This variable is zero until a process has created a thread. 47 * It is used to avoid calling locking functions in libc when they 48 * are not required. By default, libc is intended to be(come) 49 * thread-safe, but without a (significant) penalty to non-threaded 50 * processes. 51 */ 52 int __isthreaded = 0; 53 54 /* 55 * Exit, flushing stdio buffers if necessary. 56 */ 57 void 58 exit(status) 59 int status; 60 { 61 struct atexit *p; 62 int n; 63 64 #ifdef _THREAD_SAFE 65 extern int _thread_autoinit_dummy_decl; 66 /* Ensure that the auto-initialization routine is linked in: */ 67 _thread_autoinit_dummy_decl = 1; 68 #endif 69 70 for (p = __atexit; p; p = p->next) 71 for (n = p->ind; --n >= 0;) 72 (*p->fns[n])(); 73 if (__cleanup) 74 (*__cleanup)(); 75 _exit(status); 76 } 77