Bug 637258

Description of problem:
livecd-iso-to-disk doesn't fail when the device node is missing. I accidentally ejected the device (a 4G USB flash drive) instead of unmounting it and this happened:

[bcl@lister ~]$ sudo livecd-iso-to-disk --format --reset-mbr /extra/iso/Fedora-14-Beta-x86_64-netinst.iso /dev/sdd1
Verifying image...
/extra/iso/Fedora-14-Beta-x86_64-netinst.iso:   3191cf7698dda8f520aa4dd150721d19
Fragment sums: 8cd83c388bb32ffc6c2a6ab67f2d9eaf1ad24493cb22f45849c7473f2dfd
Fragment count: 20
Checking: 100.0%

The media check is complete, the result is: PASS.

It is OK to use this media.
device node not found
basename: missing operand
Try `basename --help' for more information.
WARNING: THIS WILL DESTROY ANY DATA ON /dev//!!!
Press Enter to continue or ctrl-c to abort

Warning: Unable to open /dev read-write (Is a directory).  /dev has been opened read-only.
Warning: Unable to open /dev read-write (Is a directory).  /dev has been opened read-only.
Error: Is a directory during read on /dev
Error: Is a directory during read on /dev
Error: Can't write to /dev, because it is opened read-only.
/sbin/parted: invalid option -- '1'
/sbin/parted: invalid option -- '7'
/sbin/parted: invalid option -- '4'
/sbin/parted: invalid option -- '0'
/sbin/parted: invalid option -- '8'
Usage: /sbin/parted [-hlmsv] [-a<align>] [DEVICE [COMMAND [PARAMETERS]]...]
Waiting for devices to settle...
mkdosfs 3.0.9 (31 Jan 2010)
/dev//1: No such file or directory
USB filesystem must be vfat or ext[23]
Cleaning up to exit...




No damage was done, but seeing it try to operate on /dev and /dev// is disturbing.