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The read() and write() functions

The read and write functions read and write a character string to the device. If there is no read() or write() function in the file_operations structure registered with the kernel, and the device is a character device, read() or write() system calls, respectively, will return -EINVAL. If the device is a block device, these functions should not be implemented, as the VFS will route requests through the buffer cache, which will call your strategy routine. See Section gif for details on how the buffer cache does this. The read and write functions take these arguments:


Converted on:
Mon Apr 1 10:20:16 EST 1996