Reduce log verbosity

[TheMeaningfulEngineer]

I'm running stressdisk as a systemd service and am finding the stats very useful.

Bytes read:           144 MByte (   8.73 MByte/s)
Bytes written:         78 MByte (   2.81 MByte/s)
Errors:                 0
Elapsed time:  1m0.038864945s

Especially when comparing to the numbers monitoring tools give. i.e. iostat

But the constant logging is to verbose:

Error while writing "/data/logs/TST_0004"
Removing incomplete file "/data/logs/TST_0004"
Reading file "/data/logs/TST_0002", "/data/logs/TST_0003"
Reading file "/data/logs/TST_0001", "/data/logs/TST_0002"
Reading file "/data/logs/TST_0000", "/data/logs/TST_0001"
Reading file "/data/logs/TST_0003", "/data/logs/TST_0000"
Removing 4 check files
Removing file "/data/logs/TST_0000"
Removing file "/data/logs/TST_0001"
Removing file "/data/logs/TST_0002"
Removing file "/data/logs/TST_0003"
....

Would be a great feature to be able to quiet those.

[ncw]

Do you fancy sending a pull request adding a -q flag?