|RMT(8)||System Manager's Manual||RMT(8)|
rmtis a program used by the remote dump and restore programs through an interprocess communication connection. Traditionally it is used for manipulating a magnetic tape drive but it may be used for regular file access as well.
rmtis normally started up with an rcmd(3) or rcmdsh(3) call. The options are as follows:
rmtprogram accepts requests specific to the manipulation of magnetic tapes, performs the commands, then responds with a status indication. All responses are in ASCII and in one of two forms. Successful commands have responses of:
\n’ indicates that a newline should be supplied:
rmtreads count bytes from the connection, aborting if a premature end-of-file is encountered. The response value is that returned from the write(2) call.
rmtthen performs the requested read(2) and responds with Acount-read\n if the read was successful; otherwise an error in the standard format is returned. If the read was successful, the data read is then sent.
MTIOCOPioctl(2) command using the specified parameters. The parameters are interpreted as the ASCII representations of the decimal values to place in the mt_op and mt_count fields of the structure used in the ioctl(2) call. The return value is the count parameter when the operation is successful.
MTIOCGETioctl(2) call. If the operation was successful, an “ack” is sent with the size of the status buffer, then the status buffer is sent (in binary).
rmtto exit. rcmd(3), rcmdsh(3), mtio(4), rdump(8), rrestore(8)
rmtcommand appeared in 4.2BSD.
|September 20, 2015||OpenBSD-current|