Various fixes to do with tftp/ftp transfers.
Fixes#242 Pauses for upto 30 seconds before launching nwipe
if ftp/tftp transfers are being used. This is because if the
user specified shredos_config="..." on the kernel command line
in order to retrieve the nwipe.conf and nwipe_customers.csv
files from a local ftp/tftp server, the server needs to be
online before nwipe is launched. On some systems/networks the
ethernet hardware initialisation and then DHCP requests can be
slower than nwipe launching hence why we now ping the server
to makesure it's online before launching nwipe.
Lots of improvements to error detection and handling for tftp
Improvments to the "shredos_autoreboot=enable" option. When this
option is placed on the kernel command line shredos will reboot
upon completion of wipes. --nowait option is appled by the scipt
to nwipe so nwipe doesn't wait for user interaction before exiting.
If the shredos_config="..." or shredos_output="..." kernel command
line options have been added by the user, autoreboot and also
autoshutdown will wait after exiting nwipe if any ftp/tftp errors
occurred so the user can review the transfer log and decide on a
course of action if necessary.
3b94392d3d