Some FreeRTOS+FAT demo projects
make use of the vStdioWithCWDTest() function to
perform some basic sanity tests on the embedded FAT file system, using
the standard stdio API.
vStdioWithCWDTest() is implemented in /FreeRTOS-Plus/Demo/Common/FreeRTOS_Plus_FAT_Demos/test/ff_stdio_tests_with_cwd.c,
its implementation can serve as a useful reference.
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