Add a summary table to the log that shows each drives status
i.e. erased or failed, throughput, duration of wipe, model,
serial no etc. In particular it benefits those that wipe many
drives simultaneously in rack servers. At a glance any failed
drives can be seen without having to browse back through the
log. Especially useful in --nogui mode, but also useful in GUI
mode.
Add a spinner to the GUI for each drive being wiped.
When nwipe is syncing the percentage completion pauses,
having a spinner gives a clear indication that the wipe
is still running. Each devices spinner disappears on completion
of a given devices wipe.
Also added a `device_label` field to centralize
the creation of the device label. This fixes the
labels for devices without a serial number, and
makes sure we have the same label format everywhere.
Symptoms: If you control-C to exit nwipe at the end of a successful
wipe you would get a segmentation fault. If nwipe log data was being
sent to stdout rather than to a log file, then you would not see the
log in the terminal windows after nwipe had exited. This patch fixes
those problems by creating a tri-state wipe flag for each wipe
thread. The main thread after having launched the wipe threads
will wait for ALL wipe flags to report that the wipe routine has
completed and the thread has exited. Only at that time does the
main() routine then proceed with joining the threads and waiting
for the join to confirm the thread has indeed exited. This join
is important as the thread will not actually exit until the OS
has flushed the disk buffers. Currently nwipe does not use O_SYNC
where data is sent straight to disk. Therefore it's important
to wait for data to be flushed before exiting nwipe. Part of this
patch is introducing a "please wait .. disks are being flushed"
prior to exiting nwipe otherwise it might look like nwipe had
hung. A disk flush in terms of how long it takes, can be from
instantly to 30 seconds or more, depending on how much system
memory you have, when the last sync occurred and if you have
changed the sync option from it's default. Something else to
note is that when all wipes have finished nwipe displays "Enter
To Exit" on the status line at the bottom of the screen. I
believe typing 'enter' rather than control-c did not produce a
segmentation fault. Irrespective, both methods of exiting nwipe
have been tested and confirmed to now work correctly. Tested
overnight with two drives using multiple wipe methods,
verification and blanking.
Using musl libc, the loff_t type is unavailable. This is only exported by the
kernel when building with GNU_SOURCE, so there's an argument to be made that
it's desired behavior; see http://www.openwall.com/lists/musl/2013/01/23/6 for
discussion on this point.
