Backup scripts access tape device using special hook functions. These functions take a single argument — the name of the tape device. Their names are kept in the following variables:
The name of begin function. This function is called before accessing the drive. By default it retensions the tape:
MT_BEGIN=mt_begin
mt_begin() {
mt -f "$1" retension
}
The name of rewind function. The default definition is as follows:
MT_REWIND=mt_rewind
mt_rewind() {
mt -f "$1" rewind
}
The name of the function switching the tape off line. By default it is defined as follows:
MT_OFFLINE=mt_offline
mt_offline() {
mt -f "$1" offl
}
The name of the function used to obtain the status of the archive device, including error count. Default definition:
MT_STATUS=mt_status
mt_status() {
mt -f "$1" status
}