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Author SHA1 Message Date
Olliver Schinagl 7b1ff70a52 nfc-mfultralight: Show help when no arguments are supplied 
For some reason, 0cece94778 changed the argc count check to only show
the help if argc is 0. Obviously, argc is never zero, as the first
argument in argv is always the binary itself. Revert that and show usage
if there is no arguments supplied to the binary.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
 2016-05-11 09:38:39 +02:00
Olliver Schinagl e1a25a8203 nfc-mfclassic: Add option to specify key 
The nfc-mfclassic utility will pick a seemingly random (the libnfc
default which seems to be the lowest UID). With the new (u|U) options
it is now possible to force a UID and thus write a specific tag, which
can be very useful if there are more then one tag visible.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
 2016-05-11 09:38:39 +02:00
Olliver Schinagl 898f3a4d2f nfc-mfclassic: check argc < 4 only once 
Currently the check on argc is done twice, once in each if branch. This
is silly and we can just check once and fail right away.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
 2016-05-11 09:38:39 +02:00