1*43a90889SApple OSS Distributions /*
2*43a90889SApple OSS Distributions * Copyright (c) 2003-2010 Apple Inc. All rights reserved.
3*43a90889SApple OSS Distributions *
4*43a90889SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*43a90889SApple OSS Distributions *
6*43a90889SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*43a90889SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*43a90889SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*43a90889SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*43a90889SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*43a90889SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*43a90889SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*43a90889SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*43a90889SApple OSS Distributions *
15*43a90889SApple OSS Distributions * Please obtain a copy of the License at
16*43a90889SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*43a90889SApple OSS Distributions *
18*43a90889SApple OSS Distributions * The Original Code and all software distributed under the License are
19*43a90889SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*43a90889SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*43a90889SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*43a90889SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*43a90889SApple OSS Distributions * Please see the License for the specific language governing rights and
24*43a90889SApple OSS Distributions * limitations under the License.
25*43a90889SApple OSS Distributions *
26*43a90889SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*43a90889SApple OSS Distributions */
28*43a90889SApple OSS Distributions /*
29*43a90889SApple OSS Distributions * @OSF_FREE_COPYRIGHT@
30*43a90889SApple OSS Distributions *
31*43a90889SApple OSS Distributions */
32*43a90889SApple OSS Distributions
33*43a90889SApple OSS Distributions #include <mach/mach.h>
34*43a90889SApple OSS Distributions #include <mach/mach_init.h>
35*43a90889SApple OSS Distributions #include <stdarg.h>
36*43a90889SApple OSS Distributions #include "string.h"
37*43a90889SApple OSS Distributions
38*43a90889SApple OSS Distributions int (*vprintf_stderr_func)(const char *format, va_list ap) __printflike(1, 0);
39*43a90889SApple OSS Distributions
40*43a90889SApple OSS Distributions #define __STDERR_FILENO 2
41*43a90889SApple OSS Distributions int write(int fd, const char* cbuf, int nbyte);
42*43a90889SApple OSS Distributions
43*43a90889SApple OSS Distributions /* This function allows the writing of a mach error message to an
44*43a90889SApple OSS Distributions * application-controllable output method, the default being to
45*43a90889SApple OSS Distributions * use printf if no other method is specified by the application.
46*43a90889SApple OSS Distributions *
47*43a90889SApple OSS Distributions * To override, set the global function pointer vprintf_stderr to
48*43a90889SApple OSS Distributions * a function which takes the same parameters as vprintf.
49*43a90889SApple OSS Distributions */
50*43a90889SApple OSS Distributions
51*43a90889SApple OSS Distributions __printflike(1, 2)
52*43a90889SApple OSS Distributions __private_extern__ int
fprintf_stderr(const char * format,...)53*43a90889SApple OSS Distributions fprintf_stderr(const char *format, ...)
54*43a90889SApple OSS Distributions {
55*43a90889SApple OSS Distributions va_list args;
56*43a90889SApple OSS Distributions int retval;
57*43a90889SApple OSS Distributions
58*43a90889SApple OSS Distributions va_start(args, format);
59*43a90889SApple OSS Distributions if (vprintf_stderr_func == NULL) {
60*43a90889SApple OSS Distributions char buffer[1024];
61*43a90889SApple OSS Distributions retval = _mach_vsnprintf(buffer, sizeof(buffer), format, args);
62*43a90889SApple OSS Distributions write(__STDERR_FILENO, buffer, retval);
63*43a90889SApple OSS Distributions } else {
64*43a90889SApple OSS Distributions retval = (*vprintf_stderr_func)(format, args);
65*43a90889SApple OSS Distributions }
66*43a90889SApple OSS Distributions va_end(args);
67*43a90889SApple OSS Distributions
68*43a90889SApple OSS Distributions return retval;
69*43a90889SApple OSS Distributions }
70