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ad787160 C |
1 | /* |
2 | * Copyright (c) 1988, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
c0567266 KB |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
ad787160 C |
32 | */ |
33 | ||
34 | #if defined(LIBC_SCCS) && !defined(lint) | |
35 | static char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; | |
36 | #endif /* LIBC_SCCS and not lint */ | |
37 | ||
38 | #include <string.h> | |
39 | ||
40 | char * | |
41 | strerror(num) | |
42 | int num; | |
43 | { | |
44 | extern int sys_nerr; | |
45 | extern char *sys_errlist[]; | |
46 | #define UPREFIX "Unknown error: " | |
47 | static char ebuf[40] = UPREFIX; /* 64-bit number + slop */ | |
48 | register unsigned int errnum; | |
49 | register char *p, *t; | |
50 | char tmp[40]; | |
51 | ||
52 | errnum = num; /* convert to unsigned */ | |
53 | if (errnum < sys_nerr) | |
54 | return(sys_errlist[errnum]); | |
55 | ||
56 | /* Do this by hand, so we don't include stdio(3). */ | |
57 | t = tmp; | |
58 | do { | |
59 | *t++ = "0123456789"[errnum % 10]; | |
60 | } while (errnum /= 10); | |
61 | for (p = ebuf + sizeof(UPREFIX) - 1;;) { | |
62 | *p++ = *--t; | |
63 | if (t <= tmp) | |
64 | break; | |
65 | } | |
66 | return(ebuf); | |
67 | } |