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Answer whether the file is open and we can read from it
Answer whether the file is open and we can write from it
If the file is open, wait until data can be read from it. The wait allows other Processes to run.
If the file is open, wait until we can write to it. The wait allows other Processes to run.
Answer whether the file is open and an exceptional condition (such as presence of out of band data) has occurred on it
Return the OS file descriptor of the file
Return the name of the file
Answer whether the file is still open
Present for compatibility with sockets. For files, it answers whether the file is still open
Answer whether the file is a pipe or an actual disk file
Return the name of the file
If the file is open, wait until an exceptional condition (such as presence of out of band data) has occurred on it. The wait allows other Processes to run.