Since a command would still be running on time out, it would prevent
issuing subsequent commands in the same SSH shell, make it look like
the device has become unresponsive.
If a timeout condition is his, send ^C to kill the current foreground
process and make the shell available for subsequent commands.
The key file must only be readable by the owner. If the specified key
file has different access permissions, create a temporary copy with the
right permissions and use that.
- adding missing cpu id conversion to set_cpu_min_freq
- adding "exact" parameter to set_cpu_frequency; only produce an error
when the specified frequency is not supported by the cpu if "axact"
is set; (otherwise let cpufreq decide what the actual frequency will
be).
- connect() to device before issuing the initial reboot, as soft reset
requires a device connection.
- boot() has been implemented to wait properly for the device to reboot
after reset.
- port now defaults to 22 rather than being left unset, as need
something to connect to when polling for device after reboot.
- Only use -P option for scp when port is *not* 22; as that option
appears to cause intermittent issues with default scp on Ubuntu 12.04
On some devices, sudo presents a different prompt when asking for a
password. All the prompt to be specified in device configruation to
handle such cases.
