1 #if defined(LIBC_SCCS) && !defined(lint) 2 static const char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; 3 static const char rcsid[] = "$Id: strerror.c,v 1.6 2008/02/18 03:49:08 marka Exp $"; 4 #endif /* LIBC_SCCS and not lint */ 5 6 /* 7 * Copyright (c) 1988, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include "port_before.h" 40 41 #include <sys/param.h> 42 #include <sys/types.h> 43 44 #include <string.h> 45 46 #include "port_after.h" 47 48 #ifndef NEED_STRERROR 49 int __strerror_unneeded__; 50 #else 51 52 #ifdef USE_SYSERROR_LIST 53 extern int sys_nerr; 54 extern char *sys_errlist[]; 55 #endif 56 57 const char * 58 isc_strerror(int num) { 59 #define UPREFIX "Unknown error: " 60 static char ebuf[40] = UPREFIX; /*%< 64-bit number + slop */ 61 u_int errnum; 62 char *p, *t; 63 #ifndef USE_SYSERROR_LIST 64 const char *ret; 65 #endif 66 char tmp[40]; 67 68 errnum = num; /*%< convert to unsigned */ 69 #ifdef USE_SYSERROR_LIST 70 if (errnum < (u_int)sys_nerr) 71 return (sys_errlist[errnum]); 72 #else 73 #undef strerror 74 ret = strerror(num); /*%< call strerror() in libc */ 75 if (ret != NULL) 76 return(ret); 77 #endif 78 79 /* Do this by hand, so we don't include stdio(3). */ 80 t = tmp; 81 do { 82 *t++ = "0123456789"[errnum % 10]; 83 } while (errnum /= 10); 84 for (p = ebuf + sizeof(UPREFIX) - 1;;) { 85 *p++ = *--t; 86 if (t <= tmp) 87 break; 88 } 89 return (ebuf); 90 } 91 92 #endif /*NEED_STRERROR*/ 93 94 /*! \file */ 95