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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*=====================================================================
**
** Source: test3.c
**
** Purpose: Tests the PAL implementation of the fopen function.
** Test to ensure that you can write to a 'w+' mode file.
** And that you can read from a 'w+' mode file.
**
** Depends:
** fprintf
** fseek
** fgets
**
**
**===================================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char **argv)
{
FILE *fp;
char buffer[128];
if (PAL_Initialize(argc, argv))
{
return FAIL;
}
/* Open a file with 'w+' mode */
if( (fp = fopen( "testfile", "w+" )) == NULL )
{
Fail( "ERROR: The file failed to open with 'w+' mode.\n" );
}
/* Write some text to the file */
if(fprintf(fp,"%s","some text") <= 0)
{
Fail("ERROR: Attempted to WRITE to a file opened with 'w+' mode "
"but fprintf failed. Either fopen or fprintf have problems.");
}
if(fseek(fp, 0, SEEK_SET))
{
Fail("ERROR: fseek failed, and this test depends on it.");
}
/* Attempt to read from the 'w+' only file, should pass */
if(fgets(buffer,10,fp) == NULL)
{
Fail("ERROR: Tried to READ from a file with 'w+' mode set. "
"This should succeed, but fgets returned NULL. Either fgets "
"or fopen is broken.");
}
PAL_Terminate();
return PASS;
}
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