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doc: shred: Correct docs on default number of overwrites.

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* NEWS: Mention the change to the default number of passes.
* doc/Makefile.am: Update constants.texi with the default
number of passes shred uses, so that the documentation
will automatically reflect any future changes.
* doc/coreutils.texi (shred invocation): Update the description
of the --iterations option to have the correct default number,
while still conveying that there are 25 internal patterns
that may be useful.
This commit is contained in:
Pádraig Brady 2009-01-22 19:34:11 +00:00
parent 83ae1bdd44
commit 10f3e12a0d
3 changed files with 10 additions and 5 deletions
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2
NEWS
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@ -41,6 +41,8 @@ GNU coreutils NEWS -*- outline -*-
du: -H (initially equivalent to --si) is now equivalent to
--dereference-args, and thus works as POSIX requires
shred: now does 3 overwrite passes by default rather than 25.
ls -l now marks SELinux-only files with the less obtrusive '.',
rather than '+'. A file with any other combination of MAC and ACL
is still marked with a '+'.

5
doc/Makefile.am
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@ -29,10 +29,13 @@ EXTRA_DIST = perm.texi getdate.texi constants.texi fdl.texi
# old systems.
AM_MAKEINFOFLAGS = --no-split
constants.texi: $(top_srcdir)/src/tail.c
constants.texi: $(top_srcdir)/src/tail.c $(top_srcdir)/src/shred.c
LC_ALL=C \
sed -n -e 's/^#define \(DEFAULT_MAX[_A-Z]*\) \(.*\)/@set \1 \2/p' \
$(top_srcdir)/src/tail.c > t-$@
LC_ALL=C \
sed -n -e 's/.*\(DEFAULT_PASSES\)[ =]* \([0-9]*\).*/@set SHRED_\1 \2/p'\
$(top_srcdir)/src/shred.c >> t-$@
mv t-$@ $@
MAINTAINERCLEANFILES = constants.texi

8
doc/coreutils.texi
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@ -8445,10 +8445,10 @@ Override file permissions if necessary to allow overwriting.
@opindex -n @var{number}
@opindex --iterations=@var{number}
@cindex iterations, selecting the number of
By default, @command{shred} uses 25 passes of overwrite. This is enough
for all of the useful overwrite patterns to be used at least once.
You can reduce this to save time, or increase it if you have a lot of
time to waste.
By default, @command{shred} uses @value{SHRED_DEFAULT_PASSES} passes of
overwrite. You can reduce this to save time, or increase it if you think it's
appropriate. After 25 passes all of the internal overwrite patterns will have
been used at least once.
@item --random-source=@var{file}
@opindex --random-source