1 /* 2 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 #if defined(LIBC_SCCS) && !defined(lint) 7 static const char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; 8 static const char rcsid[] = "$Id: strerror.c,v 8.7 2001/08/28 11:48:10 marka Exp $"; 9 #endif /* LIBC_SCCS and not lint */ 10 11 /* 12 * Copyright (c) 1988, 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #pragma ident "%Z%%M% %I% %E% SMI" 45 46 #include "port_before.h" 47 48 #include <sys/param.h> 49 #include <sys/types.h> 50 51 #include <string.h> 52 53 #include "port_after.h" 54 55 #ifndef NEED_STRERROR 56 int __strerror_unneeded__; 57 #else 58 59 #ifdef USE_SYSERROR_LIST 60 extern int sys_nerr; 61 extern char *sys_errlist[]; 62 #endif 63 64 const char * 65 isc_strerror(int num) { 66 #define UPREFIX "Unknown error: " 67 static char ebuf[40] = UPREFIX; /* 64-bit number + slop */ 68 u_int errnum; 69 char *p, *t; 70 const char *ret; 71 char tmp[40]; 72 73 errnum = num; /* convert to unsigned */ 74 #ifdef USE_SYSERROR_LIST 75 if (errnum < sys_nerr) 76 return (sys_errlist[errnum]); 77 #else 78 #undef strerror 79 ret = strerror(num); /* call strerror() in libc */ 80 if (ret != NULL) 81 return(ret); 82 #endif 83 84 /* Do this by hand, so we don't include stdio(3). */ 85 t = tmp; 86 do { 87 *t++ = "0123456789"[errnum % 10]; 88 } while (errnum /= 10); 89 for (p = ebuf + sizeof(UPREFIX) - 1;;) { 90 *p++ = *--t; 91 if (t <= tmp) 92 break; 93 } 94 return (ebuf); 95 } 96 97 #endif /*NEED_STRERROR*/ 98