f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
110 lines
3.1 KiB
Groff
110 lines
3.1 KiB
Groff
.\" $NetBSD: exit.3,v 1.15 2012/01/02 15:55:29 dholland Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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.\" Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)exit.3 8.1 (Berkeley) 6/4/93
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.\"
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.Dd January 2, 2012
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.Dt EXIT 3
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.Os
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.Sh NAME
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.Nm exit
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.Nd perform normal program termination
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In stdlib.h
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.Ft void
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.Fn exit "int status"
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.Sh DESCRIPTION
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.Fn exit
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terminates a process.
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The
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.Fa status
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values
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.Dv EXIT_SUCCESS
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and
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.Dv EXIT_FAILURE
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can be used to indicate successful and unsuccessful
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termination, respectively.
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.Pp
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Before termination it performs the following functions in the
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order listed:
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.Bl -enum -offset indent
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.It
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Call the functions registered with the
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.Xr atexit 3
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function, in the reverse order of their registration.
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.It
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Flush all open output streams.
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.It
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Close all open streams.
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.It
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Unlink all files created with the
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.Xr tmpfile 3
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function.
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.El
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.Pp
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Following this,
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.Fn exit
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calls
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.Xr _exit 2 .
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.Sh RESTRICTIONS
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Standard C guarantees only that the values zero,
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.Dv EXIT_SUCCESS ,
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and
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.Dv EXIT_FAILURE
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produce meaningful results.
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POSIX extends this to guarantee that the
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least significant 8 bits of
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.Fa status
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are preserved and returned to the parent via
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.Xr wait 2 .
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Values outside the supported range 0-255 are bitwise-truncated; therefore,
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negative values should not be used.
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.Sh RETURN VALUES
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The
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.Fn exit
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function
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never returns.
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.Sh SEE ALSO
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.Xr _exit 2 ,
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.Xr atexit 3 ,
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.Xr intro 3 ,
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.Xr tmpfile 3
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.Sh STANDARDS
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The
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.Fn exit
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function
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conforms to
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.St -ansiC .
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