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* dump_setup.cc (tfx_chars): New WCHAR array, copied from Cygwin.

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(transform_chars): New function, copied from Cygwin.
	(simple_nt_stat): New function to check file existance using native
	NT function.  Explain why.
	(directory_exists): Call simple_nt_stat.
	(file_exists): Ditto.
This commit is contained in:
Corinna Vinschen 2010-07-21 10:30:53 +00:00
parent cfdaf5654c
commit 822b654fe0
2 changed files with 114 additions and 3 deletions
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9
winsup/utils/ChangeLog
View File

@ -1,3 +1,12 @@
2010-07-21 Corinna Vinschen <corinna@vinschen.de>
* dump_setup.cc (tfx_chars): New WCHAR array, copied from Cygwin.
(transform_chars): New function, copied from Cygwin.
(simple_nt_stat): New function to check file existance using native
NT function. Explain why.
(directory_exists): Call simple_nt_stat.
(file_exists): Ditto.
2010-07-05 Christopher Faylor <me+cygwin@cgf.cx>
* ldd.cc: Clean up formatting throughout.

108
winsup/utils/dump_setup.cc
View File

@ -18,6 +18,8 @@ details. */
#include <sys/stat.h>
#include <errno.h>
#include "path.h"
#include <ddk/ntapi.h>
#include <ddk/winddk.h>
#if 0
#include "zlib.h"
#endif
@ -220,11 +222,111 @@ could_not_access (int verbose, char *filename, char *package, const char *type)
return false;
}
static const WCHAR tfx_chars[] = {
0, 0xf000 | 1, 0xf000 | 2, 0xf000 | 3,
0xf000 | 4, 0xf000 | 5, 0xf000 | 6, 0xf000 | 7,
0xf000 | 8, 0xf000 | 9, 0xf000 | 10, 0xf000 | 11,
0xf000 | 12, 0xf000 | 13, 0xf000 | 14, 0xf000 | 15,
0xf000 | 16, 0xf000 | 17, 0xf000 | 18, 0xf000 | 19,
0xf000 | 20, 0xf000 | 21, 0xf000 | 22, 0xf000 | 23,
0xf000 | 24, 0xf000 | 25, 0xf000 | 26, 0xf000 | 27,
0xf000 | 28, 0xf000 | 29, 0xf000 | 30, 0xf000 | 31,
' ', '!', 0xf000 | '"', '#',
'$', '%', '&', 39,
'(', ')', 0xf000 | '*', '+',
',', '-', '.', '\\',
'0', '1', '2', '3',
'4', '5', '6', '7',
'8', '9', 0xf000 | ':', ';',
0xf000 | '<', '=', 0xf000 | '>', 0xf000 | '?',
'@', 'A', 'B', 'C',
'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K',
'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S',
'T', 'U', 'V', 'W',
'X', 'Y', 'Z', '[',
'\\', ']', '^', '_',
'`', 'a', 'b', 'c',
'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k',
'l', 'm', 'n', 'o',
'p', 'q', 'r', 's',
't', 'u', 'v', 'w',
'x', 'y', 'z', '{',
0xf000 | '|', '}', '~', 127
};
static void
transform_chars (PWCHAR path, PWCHAR path_end)
{
for (; path <= path_end; ++path)
if (*path < 128)
*path = tfx_chars[*path];
}
extern "C" NTOSAPI NTAPI NTSTATUS NtQueryAttributesFile(
POBJECT_ATTRIBUTES, PFILE_BASIC_INFORMATION);
/* This function checks for file existance and fills the stat structure
with only the required mode info. We're using a native NT function
here, otherwise we wouldn't be able to check for files with special
characters not valid in Win32, and espacially not valid using the
ANSI API. */
static int
simple_nt_stat (const char *filename, struct stat *st)
{
size_t len = mbstowcs (NULL, filename, 0) + 1;
WCHAR path[len + 8]; /* Enough space for the NT prefix */
PWCHAR p = path;
UNICODE_STRING upath;
OBJECT_ATTRIBUTES attr;
FILE_BASIC_INFORMATION fbi;
NTSTATUS status;
wcscpy (p, L"\\??\\");
p += 4;
if (filename[0] == '\\' && filename[1] == '\\')
{
wcscpy (p, L"UNC");
p += 3;
p += mbstowcs (p, filename + 1, len);
}
else
p += mbstowcs (p, filename, len);
/* Remove trailing backslashes. NT functions don't like them. */
if (p[-1] == L'\\')
*--p = L'\0';
/* Skip prefix and drive, otherwise question marks and colons are converted
as well. */
transform_chars (path + 7, p);
RtlInitUnicodeString (&upath, path);
InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL);
status = NtQueryAttributesFile (&attr, &fbi);
if (NT_SUCCESS (status))
{
st->st_mode = (fbi.FileAttributes & FILE_ATTRIBUTE_DIRECTORY)
? S_IFDIR : S_IFREG;
return 0;
}
if (status == STATUS_OBJECT_PATH_NOT_FOUND
|| status == STATUS_OBJECT_NAME_INVALID
|| status == STATUS_BAD_NETWORK_PATH
|| status == STATUS_BAD_NETWORK_NAME
|| status == STATUS_NO_MEDIA_IN_DEVICE
|| status == STATUS_OBJECT_NAME_NOT_FOUND
|| status == STATUS_NO_SUCH_FILE)
errno = ENOENT;
else
errno = EACCES;
return -1;
}
static bool
directory_exists (int verbose, char *filename, char *package)
{
struct stat status;
if (stat(cygpath("/", filename, ".", NULL), &status))
if (simple_nt_stat(cygpath("/", filename, NULL), &status))
{
if (could_not_access (verbose, filename, package, "directory"))
return false;
@ -242,8 +344,8 @@ static bool
file_exists (int verbose, char *filename, const char *alt, char *package)
{
struct stat status;
if (stat(cygpath("/", filename, NULL), &status) &&
(!alt || stat(cygpath("/", filename, alt, NULL), &status)))
if (simple_nt_stat(cygpath("/", filename, NULL), &status) &&
(!alt || simple_nt_stat(cygpath("/", filename, alt, NULL), &status)))
{
if (could_not_access (verbose, filename, package, "file"))
return false;