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/****************************************************************************
* examples/elf/tests/errno/errno.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
/****************************************************************************
* Included Files
****************************************************************************/
static const char g_nonexistent[] = "aflav-sautga-ay";
/****************************************************************************
* Public Functions
****************************************************************************/
int main(int argc, char **argv)
{
FILE *test_stream;
/* Try using stdout and stderr explicitly. These are global variables
* exported from the base code.
*/
fprintf(stdout, "Hello, World on stdout\n");
fprintf(stderr, "Hello, World on stderr\n");
/* Try opening a non-existent file using buffered IO. */
test_stream = fopen(g_nonexistent, "r");
if (test_stream)
{
fprintf(stderr, "Hmm... Delete \"%s\" and try this again\n",
g_nonexistent);
exit(1);
}
/* Now print the errno on stderr. Errno is also a global
* variable exported by the base code.
*/
fprintf(stderr, "We failed to open \"%s!\" errno is %d\n",
g_nonexistent, errno);
return 0;
}
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