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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: Tries to read from an empty file using fgets(), to verify
** handling of EOF condition.
**
**
**==========================================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char **argv)
{
char inBuf[10];
const char filename[] = "testfile.tmp";
FILE * fp;
if (PAL_Initialize(argc, argv))
{
return FAIL;
}
/*write the empty file that we will use to test */
fp = fopen(filename, "w");
if (fp == NULL)
{
Fail("Unable to open file for write.\n");
}
/*Don't write anything*/
if (fclose(fp) != 0)
{
Fail("Error closing stream opened for write.\n");
}
/*Open the file and try to read.*/
fp = fopen(filename, "r");
if (fp == NULL)
{
Fail("Unable to open file for read.\n");
}
if (fgets(inBuf, sizeof(inBuf) , fp) != NULL)
{
/*NULL could also mean an error condition, but since the PAL
doesn't supply feof or ferror, we can't distinguish between
the two.*/
Fail("fgets doesn't handle EOF properly. When asked to read from "
"an empty file, it didn't return NULL as it should have.\n");
}
if (fclose(fp) != 0)
{
Fail("Error closing an empty file after trying to use fgets().\n");
}
PAL_Terminate();
return PASS;
}
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