2 * Copyright (C) 2001 Internet Software Consortium.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
9 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
10 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
11 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
13 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
14 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
15 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: strerror.c,v 1.3 2001/11/20 01:45:45 gson Exp $ */
25 #include <isc/mutex.h>
27 #include <isc/print.h>
28 #include <isc/strerror.h>
33 * We need to do this this way for profiled locks.
35 static isc_mutex_t isc_strerror_lock;
36 static void init_lock(void) {
37 RUNTIME_CHECK(isc_mutex_init(&isc_strerror_lock) == ISC_R_SUCCESS);
40 extern const char * const sys_errlist[];
41 extern const int sys_nerr;
45 isc__strerror(int num, char *buf, size_t size) {
48 unsigned int unum = num;
49 static isc_once_t once = ISC_ONCE_INIT;
53 RUNTIME_CHECK(isc_once_do(&once, init_lock) == ISC_R_SUCCESS);
55 LOCK(&isc_strerror_lock);
58 snprintf(buf, size, "%s", msg);
60 snprintf(buf, size, "Unknown error: %u", unum);
61 UNLOCK(&isc_strerror_lock);
63 unsigned int unum = num;
67 if (num >= 0 && num < sys_nerr)
68 snprintf(buf, size, "%s", sys_errlist[num]);
70 snprintf(buf, size, "Unknown error: %u", unum);