usr/src/lib/libc/port/sys/set_errno.c

   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 }