77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* $NetBSD: isc_strerror.c,v 1.2 2003/12/04 16:23:36 drochner Exp $ */
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/*
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* Copyright (C) 2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
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* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
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* INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* Id: strerror.c,v 1.3 2001/11/20 01:45:45 gson Exp */
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#include <config.h>
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#include <stdio.h>
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#include <string.h>
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#include <isc/mutex.h>
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#include <isc/once.h>
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#include <isc/print.h>
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#include <isc/strerror.h>
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#include <isc/util.h>
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#include "l_stdlib.h"
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#ifdef HAVE_STRERROR
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/*
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* We need to do this this way for profiled locks.
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*/
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static isc_mutex_t isc_strerror_lock;
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static void init_lock(void) {
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RUNTIME_CHECK(isc_mutex_init(&isc_strerror_lock) == ISC_R_SUCCESS);
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}
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#else
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extern const char * const sys_errlist[];
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extern const int sys_nerr;
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#endif
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void
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isc__strerror(int num, char *buf, size_t size) {
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#ifdef HAVE_STRERROR
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char *msg;
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unsigned int unum = num;
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static isc_once_t once = ISC_ONCE_INIT;
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REQUIRE(buf != NULL);
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RUNTIME_CHECK(isc_once_do(&once, init_lock) == ISC_R_SUCCESS);
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LOCK(&isc_strerror_lock);
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msg = strerror(num);
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if (msg != NULL)
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snprintf(buf, size, "%s", msg);
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else
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snprintf(buf, size, "Unknown error: %u", unum);
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UNLOCK(&isc_strerror_lock);
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#else
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unsigned int unum = num;
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REQUIRE(buf != NULL);
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if (num >= 0 && num < sys_nerr)
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snprintf(buf, size, "%s", sys_errlist[num]);
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else
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snprintf(buf, size, "Unknown error: %u", unum);
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#endif
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}
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