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This implementation is very messy and is currently not used.
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This commit is done to preserve the functional code before I make new
changes.
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Previously the file size would not decrease even if data was deleted.
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implementation
Previously this function was only used for shared memory region created
by shm_open because I was lazy. Now exists for all files.
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included in previous commit
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fclose
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during each iteration
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creation code
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This can be used by any program does nothing until it gets user input.
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This optimization should probably move over to memcpy later.
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This allow other processes to easily modify the wallpaper by opening the
memory region and poking into memory.
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This helps a ton when using functions such as fscanf that reads from a
FILE byte by byte. By creating a cache it avoids a ton of 'read'
syscalls that would otherwise be made.
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