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Pointer to variable that will receive the return error code from this function:
FS_ERR_NONE
Working directory set.
FS_ERR_NAME_NULL
Argument path_dir passed a NULL pointer.
FS_ERR_VOL_NONE_EXIST
No volumes exist.
FS_ERR_WORKING_DIR_NONE_AVAIL
No working directories available.
FS_ERR_WORKING_DIR_INVALID
Argument path_dir passed an invalid directory.
Returned Value,
None.
Notes/Warnings
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