mirror of
https://github.com/reactos/reactos.git
synced 2025-06-25 05:59:43 +00:00
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/***
|
|
*perror.c - print system error message
|
|
*
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* defines perror() - print system error message
|
|
* System error message are indexed by errno; conforms to XENIX
|
|
* standard, with much compatability with 1983 uniforum draft standard.
|
|
*
|
|
*******************************************************************************/
|
|
#include <corecrt_internal.h>
|
|
#include <corecrt_internal_lowio.h>
|
|
#include <corecrt_internal_ptd_propagation.h>
|
|
#include <io.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#pragma warning(disable:__WARNING_RETVAL_IGNORED_FUNC_COULD_FAIL) // 6031 return value ignored
|
|
|
|
/***
|
|
*void perror(message) - print system error message
|
|
*
|
|
*Purpose:
|
|
* prints user's error message, then follows it with ": ", then the system
|
|
* error message, then a newline. All output goes to stderr. If user's
|
|
* message is nullptr or a null string, only the system error message is
|
|
* printer. If errno is weird, prints "Unknown error".
|
|
*
|
|
*Entry:
|
|
* const char *message - users message to prefix system error message
|
|
*
|
|
*Exit:
|
|
* Prints message; no return value.
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
static void __cdecl _perror_internal(char const* const user_prefix, __crt_cached_ptd_host& ptd)
|
|
{
|
|
int const fh = 2;
|
|
|
|
__acrt_lowio_lock_fh(fh);
|
|
__try
|
|
{
|
|
if (user_prefix != nullptr && user_prefix[0] != '\0')
|
|
{
|
|
_write_nolock(fh, user_prefix, static_cast<unsigned>(strlen(user_prefix)), ptd);
|
|
_write_nolock(fh, ": ", 2, ptd);
|
|
}
|
|
|
|
// Use PTD directly to access previously set errno value.
|
|
char const* const system_message = _get_sys_err_msg(ptd.get_raw_ptd()->_terrno);
|
|
|
|
_write_nolock(fh, system_message, static_cast<unsigned>(strlen(system_message)), ptd);
|
|
_write_nolock(fh, "\n", 1, ptd);
|
|
|
|
}
|
|
__finally
|
|
{
|
|
__acrt_lowio_unlock_fh( fh );
|
|
}
|
|
__endtry
|
|
}
|
|
|
|
extern "C" void __cdecl perror(char const* const user_prefix)
|
|
{
|
|
__crt_cached_ptd_host ptd;
|
|
return _perror_internal(user_prefix, ptd);
|
|
}
|