external/bsd/am-utils/dist/libamu/strerror.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2002-2009 Ion Badulescu
   5  * Copyright (c) 1997-2009 Erez Zadok
   6  * Copyright (c) 1990 Jan-Simon Pendry
   7  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   8  * Copyright (c) 1990 The Regents of the University of California.
   9  * All rights reserved.
  10  *
  11  * This code is derived from software contributed to Berkeley by
  12  * Jan-Simon Pendry at Imperial College, London.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. All advertising materials mentioning features or use of this software
  23  *    must display the following acknowledgment:
  24  *      This product includes software developed by the University of
  25  *      California, Berkeley and its contributors.
  26  * 4. Neither the name of the University nor the names of its contributors
  27  *    may be used to endorse or promote products derived from this software
  28  *    without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  40  * SUCH DAMAGE.
  41  *
  42  *
  43  * File: am-utils/libamu/strerror.c
  44  *
  45  */
  46
  47 #ifdef HAVE_CONFIG_H
  48 # include <config.h>
  49 #endif /* HAVE_CONFIG_H */
  50 #include <am_defs.h>
  51 #include <amu.h>
  52
  53
  54 /*
  55  * Convert errno to a string
  56  */
  57 char *
  58 strerror(int errnum)
  59 {
  60 #ifdef HAVE_EXTERN_SYS_ERRLIST
  61   if (errnum < 0 || errnum >= (sizeof(sys_errlist) >> 2)) {
  62     static char errstr[30];
  63     xsnprintf(errstr, sizeof(errstr), "Unknown error #%d", errnum);
  64     return errstr;
  65   }
  66   return sys_errlist[error];
  67 #else  /* not HAVE_EXTERN_SYS_ERRLIST */
  68   return "unknown (strerror not available)";
  69 #endif /* not HAVE_EXTERN_SYS_ERRLIST */
  70 }