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* path.cc (cygwin_conv_path): Rearrange test for "." in POSIX to

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relative DOS path conversion.  Simplify fixing the path.
	In CCP_POSIX_TO_WIN_W conversion, always drop long path prefix if path
	fits into MAX_PATH.  Explain why.
This commit is contained in:
Corinna Vinschen 2010-08-04 11:25:13 +00:00
parent 0de7cf04f3
commit 06cc41a63a
2 changed files with 38 additions and 9 deletions
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7
winsup/cygwin/ChangeLog
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@ -1,3 +1,10 @@
2010-08-04 Corinna Vinschen <corinna@vinschen.de>
* path.cc (cygwin_conv_path): Rearrange test for "." in POSIX to
relative DOS path conversion. Simplify fixing the path.
In CCP_POSIX_TO_WIN_W conversion, always drop long path prefix if path
fits into MAX_PATH. Explain why.
2010-08-01 Christopher Faylor <me+cygwin@cgf.cx> 2010-08-01 Christopher Faylor <me+cygwin@cgf.cx>
* exceptions.cc (_cygtls::interrupt_now): Revert to checking for * exceptions.cc (_cygtls::interrupt_now): Revert to checking for

40
winsup/cygwin/path.cc
View File

@ -2805,6 +2805,7 @@ cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to,
path_conv p; path_conv p;
size_t lsiz = 0; size_t lsiz = 0;
char *buf = NULL; char *buf = NULL;
PWCHAR path = NULL;
int error = 0; int error = 0;
bool relative = !!(what & CCP_RELATIVE); bool relative = !!(what & CCP_RELATIVE);
what &= ~CCP_RELATIVE; what &= ~CCP_RELATIVE;
@ -2833,11 +2834,11 @@ cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to,
backslash ".\\" in the Win32 path. That's a result of the backslash ".\\" in the Win32 path. That's a result of the
conversion in normalize_posix_path. This should not occur conversion in normalize_posix_path. This should not occur
so the below code is just a band-aid. */ so the below code is just a band-aid. */
if (!strcmp ((const char *) from, ".") && relative if (relative && !strcmp ((const char *) from, ".")
&& !strcmp (buf, ".\\")) && !strcmp (buf, ".\\"))
{ {
--lsiz; lsiz = 2;
buf[lsiz - 1] = '\0'; buf[1] = '\0';
} }
} }
break; break;
@ -2858,13 +2859,34 @@ cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to,
return_with_errno (p.error); return_with_errno (p.error);
} }
lsiz = p.get_wide_win32_path_len () + 1; lsiz = p.get_wide_win32_path_len () + 1;
path = p.get_nt_native_path ()->Buffer;
/* Convert native path to standard DOS path. */
if (!wcsncmp (path, L"\\??\\", 4))
{
path[1] = L'\\';
/* Drop long path prefix for short pathnames. Unfortunately there's
quite a bunch of Win32 functions, especially in user32.dll,
apparently, which don't grok long path names at all, not even
in the UNICODE API. */
if (lsiz <= MAX_PATH + 4 || (path[5] != L':' && lsiz <= MAX_PATH + 6))
{
path += 4;
lsiz -= 4;
if (path[1] != L':')
{
*(path += 2) = '\\';
lsiz -= 2;
}
}
}
/* TODO: Same ".\\" band-aid as in CCP_POSIX_TO_WIN_A case. */ /* TODO: Same ".\\" band-aid as in CCP_POSIX_TO_WIN_A case. */
if (!strcmp ((const char *) from, ".") && relative if (relative && !strcmp ((const char *) from, ".")
&& !wcscmp (p.get_nt_native_path ()->Buffer, L".\\")) && !wcscmp (path, L".\\"))
{ {
--lsiz; lsiz = 2;
p.get_nt_native_path ()->Length -= sizeof (WCHAR); path[1] = L'\0';
p.get_nt_native_path ()->Buffer[lsiz - 1] = L'\0';
} }
lsiz *= sizeof (WCHAR); lsiz *= sizeof (WCHAR);
break; break;
@ -2903,7 +2925,7 @@ cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to,
strcpy ((char *) to, buf); strcpy ((char *) to, buf);
break; break;
case CCP_POSIX_TO_WIN_W: case CCP_POSIX_TO_WIN_W:
p.get_wide_win32_path ((PWCHAR) to); wcscpy ((PWCHAR) to, path);
break; break;
} }
return 0; return 0;