diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2016-08-27 21:27:52 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2016-08-27 21:27:52 +0200 |
| commit | b59aa679226d0775838f87289b60bf9b7c626315 (patch) | |
| tree | 2c5661a6a8d313b43ed4900a7eb8be488a494096 /sys | |
| parent | f777743b7242e539a8ac806e4e15c4b527be4bb6 (diff) | |
rand(2), cons(3): clarify /dev/random behaviour
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/man/2/rand | 4 | ||||
| -rw-r--r-- | sys/man/3/cons | 11 |
2 files changed, 4 insertions, 11 deletions
diff --git a/sys/man/2/rand b/sys/man/2/rand index 471c1b607..c091d1521 100644 --- a/sys/man/2/rand +++ b/sys/man/2/rand @@ -109,10 +109,6 @@ starting state. .I Truerand returns a random unsigned long read from .BR /dev/random . -Due to the nature of -.BR /dev/random , -truerand can only return a few hundred bits a -second. .PP .I Ntruerand returns a uniform random integer diff --git a/sys/man/3/cons b/sys/man/3/cons index a12f1cf23..d9f75368a 100644 --- a/sys/man/3/cons +++ b/sys/man/3/cons @@ -114,13 +114,10 @@ The hostowner also has group permissions for any local devices. .PP Reads from .B random -return a stream of random numbers. The numbers are -generated by a low priority kernel process that loops -incrementing a variable. Each clock tick the variable -is sampled and, if it has changed sufficiently, the last -few bits are appended to a buffer. This process is inefficient -at best producing at most a few hundred bits a second. -Therefore, +return a stream of random bytes produced by the kernels cryptographic +random number generator. The rate at which data can be read depends on +the implementation and can vary from hundreds of megabytes to just +a few hundred bits a second. Therefore, .B random should be treated as a seed to pseudo-random number generators which can produce a faster |