1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* util/support/strerror_r.c - strerror_r compatibility shim */
4 * Copyright (C) 2014 by the Massachusetts Institute of Technology.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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33 #include <k5-platform.h>
38 /* Implement strerror_r in terms of strerror_s. */
40 k5_strerror_r(int errnum, char *buf, size_t buflen)
44 st = strerror_s(buf, buflen, errnum);
51 #elif !defined(HAVE_STRERROR_R)
53 /* Implement strerror_r in terms of strerror (not thread-safe). */
55 k5_strerror_r(int errnum, char *buf, size_t buflen)
57 if (strlcpy(buf, strerror(errnum), buflen) >= buflen) {
64 #elif defined(STRERROR_R_CHAR_P)
67 * Implement the POSIX strerror_r API in terms of the GNU strerror_r, which
68 * returns a pointer to either the caller buffer or a constant string. This is
69 * the default version on glibc systems when _GNU_SOURCE is defined.
72 k5_strerror_r(int errnum, char *buf, size_t buflen)
76 str = strerror_r(errnum, buf, buflen);
78 if (strlcpy(buf, str, buflen) >= buflen) {
88 /* Define a stub in terms of the real strerror_r, just to simplify the library
89 * export list. This shouldn't get used. */
91 k5_strerror_r(int errnum, char *buf, size_t buflen)
93 return strerror_r(errnum, buf, buflen);