Add nsswitch support.
[dragonfly.git] / lib / libc / string / strsignal.c
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1/*
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
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.
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32 *
33 * @(#)strerror.c 8.1 (Berkeley) 6/4/93
34 * $FreeBSD: src/lib/libc/string/strsignal.c,v 1.1.2.1 2001/07/09 23:30:07 obrien Exp $
bd4c62e8 35 * $DragonFly: src/lib/libc/string/strsignal.c,v 1.4 2005/09/18 16:32:34 asmodai Exp $
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36 */
37
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38#include <stdio.h>
39#include <string.h>
40#include <signal.h>
41
42char *
bd4c62e8 43strsignal(int num)
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44{
45#define UPREFIX "Unknown signal: "
46 static char ebuf[40] = UPREFIX; /* 64-bit number + slop */
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47 unsigned int signum;
48 char *p, *t;
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49 char tmp[40];
50
51 signum = num; /* convert to unsigned */
52 if (signum < sys_nsig)
53 return ((char *)sys_siglist[signum]);
54
55 /* Do this by hand, so we don't link to stdio(3). */
56 t = tmp;
57 if (num < 0)
58 signum = -signum;
59 do {
60 *t++ = "0123456789"[signum % 10];
61 } while (signum /= 10);
62 if (num < 0)
63 *t++ = '-';
64 for (p = ebuf + sizeof(UPREFIX) - 1;;) {
65 *p++ = *--t;
66 if (t <= tmp)
67 break;
68 }
69 *p = '\0';
70 return (ebuf);
71}