Return to strerror.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / ntp / lib / isc / unix

Annotation of embedaddon/ntp/lib/isc/unix/strerror.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
                      3:  * Copyright (C) 2001  Internet Software Consortium.
                      4:  *
                      5:  * Permission to use, copy, modify, and/or distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
                     10:  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
                     11:  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
                     12:  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
                     13:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
                     14:  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
                     15:  * PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17: 
                     18: /* $Id: strerror.c,v 1.8.332.2 2009/02/16 23:47:15 tbox Exp $ */
                     19: 
                     20: /*! \file */
                     21: 
                     22: #include <config.h>
                     23: 
                     24: #include <stdio.h>
                     25: #include <string.h>
                     26: 
                     27: #include <isc/mutex.h>
                     28: #include <isc/once.h>
                     29: #include <isc/print.h>
                     30: #include <isc/strerror.h>
                     31: #include <isc/util.h>
                     32: 
                     33: #include "l_stdlib.h"          /* NTP local change */
                     34: 
                     35: #ifdef HAVE_STRERROR
                     36: /*%
                     37:  * We need to do this this way for profiled locks.
                     38:  */
                     39: static isc_mutex_t isc_strerror_lock;
                     40: static void init_lock(void) {
                     41:        RUNTIME_CHECK(isc_mutex_init(&isc_strerror_lock) == ISC_R_SUCCESS);
                     42: }
                     43: #else
                     44: extern const char * const sys_errlist[];
                     45: extern const int sys_nerr;
                     46: #endif
                     47: 
                     48: void
                     49: isc__strerror(int num, char *buf, size_t size) {
                     50: #ifdef HAVE_STRERROR
                     51:        char *msg;
                     52:        unsigned int unum = (unsigned int)num;
                     53:        static isc_once_t once = ISC_ONCE_INIT;
                     54: 
                     55:        REQUIRE(buf != NULL);
                     56: 
                     57:        RUNTIME_CHECK(isc_once_do(&once, init_lock) == ISC_R_SUCCESS);
                     58: 
                     59:        LOCK(&isc_strerror_lock);
                     60:        msg = strerror(num);
                     61:        if (msg != NULL)
                     62:                snprintf(buf, size, "%s", msg);
                     63:        else
                     64:                snprintf(buf, size, "Unknown error: %u", unum);
                     65:        UNLOCK(&isc_strerror_lock);
                     66: #else
                     67:        unsigned int unum = (unsigned int)num;
                     68: 
                     69:        REQUIRE(buf != NULL);
                     70: 
                     71:        if (num >= 0 && num < sys_nerr)
                     72:                snprintf(buf, size, "%s", sys_errlist[num]);
                     73:        else
                     74:                snprintf(buf, size, "Unknown error: %u", unum);
                     75: #endif
                     76: }