I should have been clearer; I tried this techniqe
on FreeBSD; I've not tried it on Linux yet.
(I don't have a Linux machine with a tape drive
at the moment.)
It doesn't work on FreeBSD; I was questioning
whether anyone else had tested it on Linux.
If Juergen's technique doesn't work, I'll try
the BLKGETSIZE ioctl.
Tim
Jung-uk Kim wrote:
On Saturday 20 February 2010 12:20 am, Tim Kientzle wrote:
Juergen,
I was looking at your Linux code here and thought
the technique of trying lseek(SEEK_END) might work.
Unfortunately, it doesn't: lseek(fd, 0, SEEK_END) gives
zero for both /dev/sa0 (a tape drive) and /dev/cd0
(an optical drive). Are you sure it works on Linux?
Can you please try ioctl(fd, BLKGETSIZE64, &some_uint64_var) or
ioctl(fd, BLKGETSIZE, &some_u_long_var)?
Jung-uk Kim
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