1/* 2 * Copyright (c) 2003-2010 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_FREE_COPYRIGHT@ 30 * 31 */ 32 33#include <mach/mach.h> 34#include <mach/mach_init.h> 35#include <stdarg.h> 36#include "string.h" 37 38int (*vprintf_stderr_func)(const char *format, va_list ap); 39 40#define __STDERR_FILENO 2 41int write(int fd, const char* cbuf, int nbyte); 42 43/* This function allows the writing of a mach error message to an 44 * application-controllable output method, the default being to 45 * use printf if no other method is specified by the application. 46 * 47 * To override, set the global function pointer vprintf_stderr to 48 * a function which takes the same parameters as vprintf. 49 */ 50 51__private_extern__ int 52fprintf_stderr(const char *format, ...) 53{ 54 va_list args; 55 int retval; 56 57 va_start(args, format); 58 if (vprintf_stderr_func == NULL) { 59 char buffer[1024]; 60 retval = _mach_vsnprintf(buffer, sizeof(buffer), format, args); 61 write(__STDERR_FILENO, buffer, retval); 62 } else { 63 retval = (*vprintf_stderr_func)(format, args); 64 } 65 va_end(args); 66 67 return retval; 68} 69