xref: /illumos-gate/usr/src/lib/libc/port/sys/set_errno.c (revision 9fb67ea305c66b6a297583b9b0db6796b0dfe497)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2000-2003 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include "lint.h"
30 #include <errno.h>
31 #include <sys/syscall.h>
32 
33 /*
34  * __set_errno() takes an error number, maps ERESTART into EINTR, and sets
35  * the global (or per-thread) errno.  It returns the mapped error number.
36  * __set_errno(error) is designed to be used after calling __systemcall()
37  * and getting a non-zero error return value.  (__systemcall() does not
38  * set errno and does not deal with ERESTART; it just returns the error
39  * number, if any, from the system call.)
40  */
41 int
42 __set_errno(int error)
43 {
44 	if (error == ERESTART)
45 		error = EINTR;
46 	errno = error;
47 	return (error);
48 }
49