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