套件： buffer (1.19-11)
Buffering/reblocking program for tape backups, printing, etc.
Buffer implements double buffering and can be used to keep backup tapes streaming or printers printing. It can also be used to convert a data stream to a given output blocksize.
Buffer uses shared memory to convert a variable input data rate to a constant output data rate. It is typically used in a pipe between a backup program and the tape device, but there are also other applications like buffering printer data in lpd's input filter.
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