strerror.c revision 256281
1/* 2 * Copyright (c) 2002-2006 Ion Badulescu 3 * Copyright (c) 1997-2006 Erez Zadok 4 * Copyright (c) 1990 Jan-Simon Pendry 5 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Jan-Simon Pendry at Imperial College, London. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgment: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * 41 * File: am-utils/libamu/strerror.c 42 * 43 */ 44 45#ifdef HAVE_CONFIG_H 46# include <config.h> 47#endif /* HAVE_CONFIG_H */ 48#include <am_defs.h> 49#include <amu.h> 50 51 52/* 53 * Convert errno to a string 54 */ 55char * 56strerror(int errnum) 57{ 58#ifdef HAVE_EXTERN_SYS_ERRLIST 59 if (errnum < 0 || errnum >= (sizeof(sys_errlist) >> 2)) { 60 static char errstr[30]; 61 xsnprintf(errstr, sizeof(errstr), "Unknown error #%d", errnum); 62 return errstr; 63 } 64 return sys_errlist[error]; 65#else /* not HAVE_EXTERN_SYS_ERRLIST */ 66 return "unknown (strerror not available)"; 67#endif /* not HAVE_EXTERN_SYS_ERRLIST */ 68} 69