Torsten Bögershausen <tboegi@xxxxxx> writes:
> Some file systems do not support the executable bit:
> a) The user executable bit is always 0, e.g. VFAT mounted with -onoexec
> b) The user executable bit is always 1, e.g. cifs mounted with -ofile_mode=0755
> c) There are system where user executable bit is 1 even if it should be 0
> like b), but the file mode can be maintained locally. chmod -x changes the
> file mode from 0766 to 0666, until the file system is unmounted and
> remounted and the file mode is 0766 again.
> This been observed when a Windows machine with NTFS exports a share to
> Mac OS X via smb or afp.
>
> Case a) and b) are handled by the current code.
> Case c) qualifies as "non trustable executable bit" and core.filemode
> should be false, but this is currently not done.
>
> Detect when ".git/config" has the user executable bit set after
> creat(".git/config", 0666) and set core.filemode to false.
Is this codepath reached _only_ and immediately after creat(0666) of
the config file in the same process? The function has a local
variable reinit, which is returned to the caller to help it decide
if we are re-initializing an existing repository, so I suspect that
the call to git_config_set() before this part of the code may not
necessarily be creating the file [*1*].
I _think_ in the reinit case that makes us rewrite an existing
config file, the mode bits are propagated to the new file we just
wrote from the old one; checking st1.st_mode is therefore seeing
not what create(0666) gave us but whatever random bits the user had
on the original.
Which is probably not a useful source of information to gauge the
characterisic of the filesystem, no?
[Footnote]
*1* We may have been asked to reinitialize and update an existing
repository that was created with the same or older repository format
number.
> Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
> ---
> Changes since V1:
> - Improved commit msg (hopefully)
> - Simplified the patch
> builtin/init-db.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/builtin/init-db.c b/builtin/init-db.c
> index aab44d2..195a88b 100644
> --- a/builtin/init-db.c
> +++ b/builtin/init-db.c
> @@ -252,7 +252,8 @@ static int create_default_files(const char *template_path)
> filemode = TEST_FILEMODE;
> if (TEST_FILEMODE && !lstat(path, &st1)) {
> struct stat st2;
> - filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
> + filemode = (!(st1.st_mode & S_IXUSR) &&
> + !chmod(path, st1.st_mode ^ S_IXUSR) &&
> !lstat(path, &st2) &&
> st1.st_mode != st2.st_mode &&
> !chmod(path, st1.st_mode));
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html