lib/roken/strerror_r.c

   1 /*
   2  * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <config.h>
  35
  36 #if (!defined(HAVE_STRERROR_R) && !defined(strerror_r)) || (!defined(STRERROR_R_PROTO_COMPATIBLE) && defined(HAVE_STRERROR_R))
  37
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <errno.h>
  41 #include "roken.h"
  42
  43 int ROKEN_LIB_FUNCTION
  44 rk_strerror_r(int eno, char *strerrbuf, size_t buflen)
  45 {
  46     /* Assume is the linux broken strerror_r (returns the a buffer (char *) if the input buffer wasn't use */
  47 #ifdef HAVE_STRERROR_R
  48     const char *str;
  49     str = strerror_r(eno, strerrbuf, buflen);
  50     if (str != strerrbuf)
  51         if (strlcpy(strerrbuf, str, buflen) >= buflen)
  52             return ERANGE;
  53     return 0;
  54 #else
  55     int ret;
  56     ret = strlcpy(strerrbuf, buflen, strerror(eno));
  57     if (ret > buflen)
  58         return ERANGE;
  59     return 0;
  60 #endif
  61 }
  62
  63 #endif