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author | Jim Meyering <meyering@redhat.com> | 2007-10-05 10:55:26 +0200 |
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committer | Jim Meyering <meyering@redhat.com> | 2007-10-05 13:26:46 +0200 |
commit | b4148f567d9bf7abc8e82a6f2e252f28da93f354 (patch) | |
tree | c02cabad7e804828d02acc5875bf9ae10f303a27 /src/mv.c | |
parent | 068fa34adcb846244c81704de2872102310de86e (diff) | |
download | coreutils-b4148f567d9bf7abc8e82a6f2e252f28da93f354.tar.xz |
Make a failing cross-partition mv give a sensible diagnostic.
A cross-partition move of a file in a sticky tmpdir and owned by
another user would evoke an invalid diagnostic after copying it:
mv: cannot remove `x': Operation not permitted
Either of the following (mv.c, remove.c) changes would fix the bug by
itself. I think it's slightly better to use both; the added cost is
minimal: mv: an extra lstat-per-mv-cmdline-arg-that-goes-cross-partition,
rm: an extra lstat-per-unlink-that-fails-w/EPERM.
* src/remove.c (remove_entry): Also lstat the file upon EPERM.
* src/mv.c (rm_option_init): Initialize root_dev_ino just as is done
in rm, so that a cross-partition invoked remove.c:rm call works the
same way as one invoked from the command-line use of "rm". That
setting of root_dev_ino makes rm() do the equivalent of an additional
lstat for each argument, which in turn gives rm enough information to
issue the right diagnostic.
* tests/mv/sticky-to-xpart (version): New file. Test for the above.
* tests/mv/Makefile.am (TESTS): Add sticky-to-xpart.
Arrange for "make check-root" to run the new root-only test.
* tests/Makefile.am (tb): New target, to run the new root-only test.
(all_t): Add tb.
* src/c99-to-c89.diff: Adjust offsets.
Diffstat (limited to 'src/mv.c')
-rw-r--r-- | src/mv.c | 10 |
1 files changed, 9 insertions, 1 deletions
@@ -32,6 +32,7 @@ #include "filenamecat.h" #include "quote.h" #include "remove.h" +#include "root-dev-ino.h" /* The official name of this program (e.g., no `g' prefix). */ #define PROGRAM_NAME "mv" @@ -92,7 +93,6 @@ static void rm_option_init (struct rm_options *x) { x->ignore_missing_files = false; - x->root_dev_ino = NULL; x->recursive = true; x->one_file_system = false; @@ -108,6 +108,14 @@ rm_option_init (struct rm_options *x) the initial working directory, in case one of those is a `.'-relative name. */ x->require_restore_cwd = true; + + { + static struct dev_ino dev_ino_buf; + x->root_dev_ino = get_root_dev_ino (&dev_ino_buf); + if (x->root_dev_ino == NULL) + error (EXIT_FAILURE, errno, _("failed to get attributes of %s"), + quote ("/")); + } } static void |