The Ftape Installation Guide - Ioctls
MTIOCPOS
, query the tape position
Note that ftape-2.x and sftape didn't implement this ioctl. zftape returns the
block number relative to the current tape volume, i.e. the distance to
the next file mark towards BOT. This command is sent to the drive by the
mt
command with
mt -f /dev/nqft0 tell
The following is from the standard Linux include file /usr/src/linux/include/linux/mtio.h.
/* structure for MTIOCPOS - mag tape get position command */
struct mtpos { long mt_blkno; /* current block number */ }; #define MTIOCPOS _IOR('m', 3, struct mtpos) /* get tape position */
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