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  * Copyright 2024 Oxide Computer Company
  29  */
  30
  31 /*      Copyright (c) 1988 AT&T */
  32 /*        All Rights Reserved   */
  33
  34 #include "lint.h"
  35 #include "_libc_gettext.h"
  36 #include <string.h>
  37 #include <sys/types.h>
  38 #include <errno.h>
  39
  40 extern const char _sys_errs[];
  41 extern const int _sys_index[];
  42 extern int _sys_num_err;
  43 extern const char *_sys_err_names[];
  44
  45 char *
  46 strerror_l(int errnum, locale_t loc)
  47 {
  48         if (errnum < _sys_num_err && errnum >= 0)
  49                 return (_libc_gettext_l(&_sys_errs[_sys_index[errnum]],
  50                     loc));
  51
  52         errno = EINVAL;
  53         return (_libc_gettext_l("Unknown error", loc));
  54 }
  55
  56 char *
  57 strerror(int errnum)
  58 {
  59         return (strerror_l(errnum, uselocale(NULL)));
  60 }
  61
  62 /*
  63  * A version of sterror() that always operates in the C locale. It returns NULL
  64  * rather than the "Unknown error" string.
  65  */
  66 const char *
  67 strerrordesc_np(int errnum)
  68 {
  69         if (errnum < _sys_num_err && errnum >= 0)
  70                 return (&_sys_errs[_sys_index[errnum]]);
  71
  72         errno = EINVAL;
  73         return (NULL);
  74 }
  75
  76 const char *
  77 strerrorname_np(int errnum)
  78 {
  79         if (errnum >= 0 && errnum < _sys_num_err &&
  80             _sys_err_names[errnum] != NULL) {
  81                 return (_sys_err_names[errnum]);
  82         }
  83
  84         errno = EINVAL;
  85         return (NULL);
  86 }
  87
  88 /*
  89  * Implemented strerror_r in Solaris 10 to comply with SUSv3 2001.
  90  */
  91 int
  92 strerror_r(int errnum, char *strerrbuf, size_t buflen)
  93 {
  94         char *buf;
  95         int ret = 0;
  96
  97         if (errnum < _sys_num_err && errnum >= 0) {
  98                 buf = _libc_gettext((char *)&_sys_errs[_sys_index[errnum]]);
  99         } else {
 100                 buf = _libc_gettext("Unknown error");
 101                 ret = errno = EINVAL;
 102         }
 103
 104         /*
 105          * At compile time, there is no way to determine the max size of
 106          * language-dependent error message.
 107          */
 108         if (buflen < (strlen(buf) + 1)) {
 109                 ret = errno = ERANGE;
 110         } else {
 111                 (void) strcpy(strerrbuf, buf);
 112         }
 113
 114         return (ret);
 115 }