normalize_path_copy() is not prepared to keep the double-slash of a //server/share/dir kind of path, but treats it like a regular POSIX style path and transforms it to /server/share/dir.
The bug manifests when 'git push //server/share/dir master' is run, because tmp_objdir_add_as_alternate() uses the path in normalized form when it registers the quarantine object database via link_alt_odb_entries(). Needless to say that the directory cannot be accessed using the wrongly normalized path. Fix it by skipping all of the root part, not just a potential drive prefix. offset_1st_component takes care of this, see the implementation in compat/mingw.c::mingw_offset_1st_component(). There is a change in behavior: \\server\share is not transformed into //server/share anymore, but all subsequent directory separators are rewritten to '/'. This should not make a difference; Windows can handle the mix. In the context of 'git push' this cannot be verified, though, as there seems to be an independent bug that transforms the double '\\' to a single '\' on the way. Signed-off-by: Johannes Sixt <j...@kdbg.org> --- Another long-standing bug uncovered by the quarantine series. Dscho, it looks like this could fix the original report at https://github.com/git-for-windows/git/issues/979 This patch should cook well because of the change in behavior. I would not be surprised if there is some fall-out. The other bug I'm alluding to, I still have to investigate. I do not think that it can be counted as fall-out. path.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/path.c b/path.c index 52d889c88e..02dc70fb92 100644 --- a/path.c +++ b/path.c @@ -991,7 +991,7 @@ const char *remove_leading_path(const char *in, const char *prefix) * * Performs the following normalizations on src, storing the result in dst: * - Ensures that components are separated by '/' (Windows only) - * - Squashes sequences of '/'. + * - Squashes sequences of '/' except "//server/share" on Windows * - Removes "." components. * - Removes ".." components, and the components the precede them. * Returns failure (non-zero) if a ".." component appears as first path @@ -1014,17 +1014,23 @@ const char *remove_leading_path(const char *in, const char *prefix) int normalize_path_copy_len(char *dst, const char *src, int *prefix_len) { char *dst0; - int i; - - for (i = has_dos_drive_prefix(src); i > 0; i--) - *dst++ = *src++; - dst0 = dst; + int offset; - if (is_dir_sep(*src)) { + /* + * Handle initial part of absolute path: "/", "C:/", "\\server\share/". + */ + offset = offset_1st_component(src); + if (offset) { + /* Convert the trailing separator to '/' on Windows. */ + memcpy(dst, src, offset - 1); + dst += offset - 1; *dst++ = '/'; - while (is_dir_sep(*src)) - src++; + src += offset; } + dst0 = dst; + + while (is_dir_sep(*src)) + src++; for (;;) { char c = *src; -- 2.11.0.79.g263f27a
