exit.3

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3 代码 · 共 41 行

.\" SCCSID: @(#)exit.3	8.2	1/28/91
.TH exit 3
.SH Name
exit \- terminate a process after flushing any pending output
.SH Syntax
.nf
.B void exit(\fIstatus\fP)
.B int \fIstatus\fP;
.br
.B int atexit(\fIfunc\fP)
.B void (*\fIfunc\fP)();
.fi
.SH Description
.NXR "exit subroutine (standard C)"
.NXR "_exit subroutine"
.NXR "process" "terminating after flushing pending output"
The
.PN exit
function terminates a process after calling the Standard I/O library
function,
.I _cleanup,
to flush any buffered output.
The
.PN exit
function never returns.
.PP
The
.PN atexit
function registers a function to be called 
(without arguments) at normal program termination; functions are
called in the reverse order of their registration 
(that is, most recent first). If a function is registered more than once,
it will be called more than once.
.SH Return Values
The
.PN atexit
function returns zero if the registration succeeds, or \-1 if 
the function pointer is null or if too many functions are registered.
.SH See Also
exit(2), intro(3s)