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UUCP Internals Frequently Asked Questions
Section - UUCP `e' Protocol

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UUCP `e' Protocol
=================

The `e' protocol is similar to the `t' protocol.  It does no flow
control or error checking and is intended for use over networks
providing reliable end-to-end connections, such as TCP.

The `e' protocol originated in versions of HDB UUCP.

When a UUCP package transmits a command, it simply sends the command as
an ASCII string terminated by a null byte.

When a UUCP package transmits a file, it sends the complete size of the
file as an ASCII decimal number.  The ASCII string is padded out to 20
bytes with null bytes (i.e. if the file is 1000 bytes long, it sends
`1000\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0').  It then sends the entire file.

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Last Update March 27 2014 @ 02:12 PM