Hi: 2009/8/28 Martin Møller Skarbiniks Pedersen <traxplayer@xxxxxxxxx>: > 2009/8/28 loody <miloody@xxxxxxxxx>: >> Dear all: >> I made linux running on Mips machine. >> Right now I found the /dev/random doesn't work properly, since I use >> "dd if=/dev/random of=/tmp/random.txt", it stops working. >> If I use "cat /dev/random", it will not pop out anything. >> > > You can't except to read a lot of data from a /dev/random file > From the man-page: > > " > When read, the /dev/random device will only return random bytes > within the estimated number of bits of noise in the entropy pool. > /dev/random should be suitable for uses that need very high quality > randomness such as one-time pad or key generation. > When the entropy pool is empty, reads from /dev/random will block > until additional environmental noise is gathered. > " > > Use /dev/urandom instead. thanks for your kind help :) after reading your suggestion, I guess maybe the problem comes my environment noise. Since the document says the /dev/random use environment noise to generate random number. How could I check my environment noise is enough? appreciate your help, miloody -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
