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cp: -a now preserves SELinux context, with reduced diagnostics

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* copy.c (copy_reg): Reduce SELinux context diagnostics for 'cp -a'.
(copy_internal): Likewise
* copy.h (cp_options): Add boolean reduce_diagnostics.
* cp.c (usage): Say that --archive (-a) behaves like -dR --preserve=all.
(cp_option_init): Initialize added reduce_diagnostics.
(main): Add reduce_diagnostics for the -a option, and preserve SELinux
context, if possible.
* mv.c (cp_options_init): Initialize new cp_options booleans.
* install.c (cp_option_init): Likewise.
* NEWS: Mention those behaviour changes.
* doc/coreutils.texi: Document --preserve=context, document that
diagnostics are not shown for failures of non-mandatory attributes
(just SELinux at the moment).
* tests/cp/cp-a-selinux: Check not only failures, but succesful use
of preserving SELinux context in cp.
This commit is contained in:
Ondřej Vašík
2009-02-17 15:53:39 +01:00
committed by Jim Meyering
parent 86cef85b36
commit 8c243ff965
8 changed files with 65 additions and 21 deletions
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13
doc/coreutils.texi
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@@ -7262,7 +7262,10 @@ Preserve as much as possible of the structure and attributes of the
original files in the copy (but do not attempt to preserve internal
directory structure; i.e., @samp{ls -U} may list the entries in a copied
directory in a different order).
Equivalent to @option{-dpR}.
Try to preserve SELinux security context, but ignore any failure to do that
and print no corresponding diagnostic.
This option does not preserve extended attributes(xattr) at the moment.
Equivalent to @option{-dR --preserve=all} with a few exceptions.
@item -b
@itemx @w{@kbd{--backup}[=@var{method}]}
@@ -7404,6 +7407,9 @@ Preserve in the destination files
any links between corresponding source files.
@c Give examples illustrating how hard links are preserved.
@c Also, show how soft links map to hard links with -L and -H.
@itemx context
Preserve SELinux security context of the file. @command{cp} will fail
if the preserving of SELinux security context is not succesful.
@itemx xattr
Preserve extended attributes if @command{cp} is built with xattr support,
and xattrs are supported and enabled on your file system.
@@ -7411,7 +7417,10 @@ If SELinux context and/or ACLs are implemented using xattrs,
they are preserved by this option as well.
@itemx all
Preserve all file attributes.
Equivalent to specifying all of the above.
Equivalent to specifying all of the above, but with the difference
that failure to preserve SELinux security context or extended attributes
does not change @command{cp}'s exit status.
@command{cp} does diagnose such failures.
@end table
Using @option{--preserve} with no @var{attribute_list} is equivalent