Commit 71fc3eb08b9acd359ba61b31059bf4220808a03b
2010-03-04T01:13:51
Seed the RNG using sysctl() as well as /dev/urandom William Ahern points out that if the user has chrooted, they might not have a working /dev/urandom. Linux and many of the BSDs, however, define a sysctl interface to their kernel random number generators. This patch takes a belt-and-suspenders approach and tries to do use the sysctl _and_ the /dev/urandom approach if both are present. When using the sysctl approach, it tries to bulletproof itself by checking to make sure that the buffers are actually set by the sysctl calls.