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win32.c: get attributes and VSN at once

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* win32/win32.c (wrename): get attributes and VSN at once for each
  path names.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51703 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-08-27 03:58:10 +00:00
parent f64d6357b6
commit a2da0f7e42
1 changed files with 20 additions and 23 deletions
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43
win32/win32.c
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@ -4979,24 +4979,22 @@ rb_w32_getenv(const char *name)
/* License: Ruby's */
static DWORD
get_volume_serial_number(const WCHAR *path)
get_attr_vsn(const WCHAR *path, DWORD *atts, DWORD *vsn)
{
BY_HANDLE_FILE_INFORMATION st = {0};
HANDLE h = open_special(path, 0, 0);
BOOL ret;
DWORD e = 0;
HANDLE h = open_special(path, 0, FILE_FLAG_OPEN_REPARSE_POINT);
if (h == INVALID_HANDLE_VALUE) return 0;
ret = GetFileInformationByHandle(h, &st);
if (h == INVALID_HANDLE_VALUE) return GetLastError();
if (!GetFileInformationByHandle(h, &st)) {
e = GetLastError();
}
else {
*atts = st.dwFileAttributes;
*vsn = st.dwVolumeSerialNumber;
}
CloseHandle(h);
if (!ret) return 0;
return st.dwVolumeSerialNumber;
}
/* License: Ruby's */
static int
different_device_p(const WCHAR *oldpath, const WCHAR *newpath)
{
return get_volume_serial_number(oldpath) != get_volume_serial_number(newpath);
return e;
}
/* License: Artistic or GPL */
@ -5004,20 +5002,18 @@ static int
wrename(const WCHAR *oldpath, const WCHAR *newpath)
{
int res = 0;
int oldatts;
int newatts;
int oldatts = -1, newatts = -1;
DWORD oldvsn = 0, newvsn = 0, e;
oldatts = GetFileAttributesW(oldpath);
newatts = GetFileAttributesW(newpath);
if (oldatts == -1) {
errno = map_errno(GetLastError());
e = get_attr_vsn(oldpath, &oldatts, &oldvsn);
if (e) {
errno = map_errno(e);
return -1;
}
if (oldatts & FILE_ATTRIBUTE_REPARSE_POINT) {
HANDLE fh = open_special(oldpath, 0, 0);
if (fh == INVALID_HANDLE_VALUE) {
DWORD e = GetLastError();
e = GetLastError();
if (e == ERROR_CANT_RESOLVE_FILENAME) {
errno = ELOOP;
return -1;
@ -5025,6 +5021,7 @@ wrename(const WCHAR *oldpath, const WCHAR *newpath)
}
CloseHandle(fh);
}
get_attr_vsn(newpath, &newatts, &newvsn);
RUBY_CRITICAL({
if (newatts != -1 && newatts & FILE_ATTRIBUTE_READONLY)
@ -5036,7 +5033,7 @@ wrename(const WCHAR *oldpath, const WCHAR *newpath)
if (res) {
DWORD e = GetLastError();
if ((e == ERROR_ACCESS_DENIED) && (oldatts & FILE_ATTRIBUTE_DIRECTORY) &&
different_device_p(oldpath, newpath))
oldvsn != newvsn)
errno = EXDEV;
else
errno = map_errno(e);