1*e3723e1fSApple OSS Distributions /*
2*e3723e1fSApple OSS Distributions * Copyright (c) 2003-2010 Apple Inc. All rights reserved.
3*e3723e1fSApple OSS Distributions *
4*e3723e1fSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*e3723e1fSApple OSS Distributions *
6*e3723e1fSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*e3723e1fSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*e3723e1fSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*e3723e1fSApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*e3723e1fSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*e3723e1fSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*e3723e1fSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*e3723e1fSApple OSS Distributions * terms of an Apple operating system software license agreement.
14*e3723e1fSApple OSS Distributions *
15*e3723e1fSApple OSS Distributions * Please obtain a copy of the License at
16*e3723e1fSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*e3723e1fSApple OSS Distributions *
18*e3723e1fSApple OSS Distributions * The Original Code and all software distributed under the License are
19*e3723e1fSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*e3723e1fSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*e3723e1fSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*e3723e1fSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*e3723e1fSApple OSS Distributions * Please see the License for the specific language governing rights and
24*e3723e1fSApple OSS Distributions * limitations under the License.
25*e3723e1fSApple OSS Distributions *
26*e3723e1fSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*e3723e1fSApple OSS Distributions */
28*e3723e1fSApple OSS Distributions /*
29*e3723e1fSApple OSS Distributions * @OSF_FREE_COPYRIGHT@
30*e3723e1fSApple OSS Distributions *
31*e3723e1fSApple OSS Distributions */
32*e3723e1fSApple OSS Distributions
33*e3723e1fSApple OSS Distributions #include <mach/mach.h>
34*e3723e1fSApple OSS Distributions #include <mach/mach_init.h>
35*e3723e1fSApple OSS Distributions #include <stdarg.h>
36*e3723e1fSApple OSS Distributions #include "string.h"
37*e3723e1fSApple OSS Distributions
38*e3723e1fSApple OSS Distributions int (*vprintf_stderr_func)(const char *format, va_list ap) __printflike(1, 0);
39*e3723e1fSApple OSS Distributions
40*e3723e1fSApple OSS Distributions #define __STDERR_FILENO 2
41*e3723e1fSApple OSS Distributions int write(int fd, const char* cbuf, int nbyte);
42*e3723e1fSApple OSS Distributions
43*e3723e1fSApple OSS Distributions /* This function allows the writing of a mach error message to an
44*e3723e1fSApple OSS Distributions * application-controllable output method, the default being to
45*e3723e1fSApple OSS Distributions * use printf if no other method is specified by the application.
46*e3723e1fSApple OSS Distributions *
47*e3723e1fSApple OSS Distributions * To override, set the global function pointer vprintf_stderr to
48*e3723e1fSApple OSS Distributions * a function which takes the same parameters as vprintf.
49*e3723e1fSApple OSS Distributions */
50*e3723e1fSApple OSS Distributions
51*e3723e1fSApple OSS Distributions __printflike(1, 2)
52*e3723e1fSApple OSS Distributions __private_extern__ int
fprintf_stderr(const char * format,...)53*e3723e1fSApple OSS Distributions fprintf_stderr(const char *format, ...)
54*e3723e1fSApple OSS Distributions {
55*e3723e1fSApple OSS Distributions va_list args;
56*e3723e1fSApple OSS Distributions int retval;
57*e3723e1fSApple OSS Distributions
58*e3723e1fSApple OSS Distributions va_start(args, format);
59*e3723e1fSApple OSS Distributions if (vprintf_stderr_func == NULL) {
60*e3723e1fSApple OSS Distributions char buffer[1024];
61*e3723e1fSApple OSS Distributions retval = _mach_vsnprintf(buffer, sizeof(buffer), format, args);
62*e3723e1fSApple OSS Distributions write(__STDERR_FILENO, buffer, retval);
63*e3723e1fSApple OSS Distributions } else {
64*e3723e1fSApple OSS Distributions retval = (*vprintf_stderr_func)(format, args);
65*e3723e1fSApple OSS Distributions }
66*e3723e1fSApple OSS Distributions va_end(args);
67*e3723e1fSApple OSS Distributions
68*e3723e1fSApple OSS Distributions return retval;
69*e3723e1fSApple OSS Distributions }
70