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authorPádraig Brady <P@draigBrady.com>2009-04-06 08:42:15 +0100
committerPádraig Brady <P@draigBrady.com>2009-04-07 19:01:46 +0100
commitaf5723c71e3efbfe60266162ebb5d07b45d72725 (patch)
tree0e4d0dfce546753ff8c0e749da14a6ba3a26a3b4 /NEWS
parent9fdf5845fc87135c4f68bce79f72a25d07130240 (diff)
downloadcoreutils-af5723c71e3efbfe60266162ebb5d07b45d72725.tar.xz
shred,sort,shuf: don't use /dev/urandom by default
Suggestion from Steven Schveighoffer at: http://savannah.gnu.org/patch/?6797 to greatly speed up the random passes done by shred. * gl/lib/randread.c: Default to using the internal pseudorandom generator, rather than reading /dev/urandom * src/shred.c (usage): remove mention of /dev/urandom * src/shuf.c (usage); ditto * src/sort.c (usage): ditto * doc/coreutils.text: Document the new behaviour for aquiring random data.
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@@ -7,6 +7,13 @@ GNU coreutils NEWS -*- outline -*-
ls now aligns output correctly in the presence of abbreviated month
names from the locale database that have differing widths.
+** Changes in behavior
+
+ shred, sort, shuf: now use an internal pseudorandom generator by default.
+ This is mainly noticable in shred where the 3 random passes it does by
+ default should proceed at the speed of the disk. Previously /dev/urandom
+ was used if available, which is relatively slow on GNU/Linux systems.
+
* Noteworthy changes in release 7.2 (2009-03-31) [stable]
** New features