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random.4: Since Linux 3.16, reads from /dev/urandom return at most 32 MB 

See https://bugs.debian.org/775328 and
https://bugzilla.kernel.org/show_bug.cgi?id=80981#c9

Reported-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-02-04 10:16:43 +01:00
parent 792bb5ad59
commit 866fa68185
1 changed files with 9 additions and 1 deletions
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10
man4/random.4
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@ -81,7 +81,15 @@ for the device
.IR /dev/urandom ,
signals will not be handled until after the requested random bytes
have been generated.
.LP
Since Linux 3.16,
.\" commit 79a8468747c5f95ed3d5ce8376a3e82e0c5857fc
a
.BR read (2)
from
.IR /dev/urandom
will return at most 32 MB.
Writing to \fI/dev/random\fP or \fI/dev/urandom\fP will update the
entropy pool with the data written, but this will not result in a
higher entropy count.