usr/src/lib/libc/port/gen/strerror.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 /*
  27  * Copyright 2015 Joyent, Inc.
  28  */
  29
  30 /*      Copyright (c) 1988 AT&T */
  31 /*        All Rights Reserved   */
  32
  33 #include "lint.h"
  34 #include "_libc_gettext.h"
  35 #include <string.h>
  36 #include <sys/types.h>
  37 #include <errno.h>
  38
  39 extern const char _sys_errs[];
  40 extern const int _sys_index[];
  41 extern int _sys_num_err;
  42
  43 char *
  44 strerror_l(int errnum, locale_t loc)
  45 {
  46         if (errnum < _sys_num_err && errnum >= 0)
  47                 return (_libc_gettext_l(&_sys_errs[_sys_index[errnum]],
  48                     loc));
  49
  50         errno = EINVAL;
  51         return (_libc_gettext_l("Unknown error", loc));
  52 }
  53
  54 char *
  55 strerror(int errnum)
  56 {
  57         return (strerror_l(errnum, uselocale(NULL)));
  58 }
  59
  60 /*
  61  * Implemented strerror_r in Solaris 10 to comply with SUSv3 2001.
  62  */
  63 int
  64 strerror_r(int errnum, char *strerrbuf, size_t buflen)
  65 {
  66         char *buf;
  67         int ret = 0;
  68
  69         if (errnum < _sys_num_err && errnum >= 0) {
  70                 buf = _libc_gettext((char *)&_sys_errs[_sys_index[errnum]]);
  71         } else {
  72                 buf = _libc_gettext("Unknown error");
  73                 ret = errno = EINVAL;
  74         }
  75
  76         /*
  77          * At compile time, there is no way to determine the max size of
  78          * language-dependent error message.
  79          */
  80         if (buflen < (strlen(buf) + 1)) {
  81                 ret = errno = ERANGE;
  82         } else {
  83                 (void) strcpy(strerrbuf, buf);
  84         }
  85
  86         return (ret);
  87 }