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* dtable.cc (DEV_SOCKET): New static WCHAR string. Name of 

the native NT socket device.
	(dtable::init_std_file_from_handle): Remove unused tmp_pathbuf
	variable.  Move check for sockets into FILE_TYPE_PIPE clause.
	Rely on handle_to_fn having recognized socket, or check if
	getsockopt works to accommodate NT4 shortcoming.
	(handle_to_fn): Use tmp_pathbuf for OBJECT_NAME_INFORMATION
	buffer and simplify code due to that.  Check name returned by
	NtQueryObject for socket device.
This commit is contained in:
Corinna Vinschen 2009-08-10 15:38:37 +00:00
parent 78d959ce6f
commit 019fc8d880
2 changed files with 129 additions and 113 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,15 @@
2009-08-10 Corinna Vinschen <corinna@vinschen.de>
* dtable.cc (DEV_SOCKET): New static WCHAR string. Name of
the native NT socket device.
(dtable::init_std_file_from_handle): Remove unused tmp_pathbuf
variable. Move check for sockets into FILE_TYPE_PIPE clause.
Rely on handle_to_fn having recognized socket, or check if
getsockopt works to accommodate NT4 shortcoming.
(handle_to_fn): Use tmp_pathbuf for OBJECT_NAME_INFORMATION
buffer and simplify code due to that. Check name returned by
NtQueryObject for socket device.
2009-08-10 Christopher Faylor <me+cygwin@cgf.cx>
* fhandler_console.cc (create_invisible_console_workaround): Fix size

230
winsup/cygwin/dtable.cc
View File

@ -40,6 +40,7 @@ static bool handle_to_fn (HANDLE, char *);
#define WCLEN(x) ((sizeof (x) / sizeof (WCHAR)) - 1)
char unknown_file[] = "some disk file";
const WCHAR DEV_NULL[] = L"\\Device\\Null";
static const WCHAR DEV_SOCKET[] = L"\\Device\\Afd";
const WCHAR DEVICE_PREFIX[] = L"\\device\\";
const size_t DEVICE_PREFIX_LEN WCLEN (DEVICE_PREFIX);
@ -271,12 +272,9 @@ void
dtable::init_std_file_from_handle (int fd, HANDLE handle)
{
CONSOLE_SCREEN_BUFFER_INFO buf;
struct sockaddr sa;
int sal = sizeof (sa);
DCB dcb;
unsigned bin = O_BINARY;
device dev;
tmp_pathbuf tp;
dev.devn = 0; /* FIXME: device */
first_fd_for_open = 0;
@ -293,8 +291,21 @@ dtable::init_std_file_from_handle (int fd, HANDLE handle)
/* can't figure out what this is */;
else if (ft == FILE_TYPE_PIPE)
{
int rcv = 0, len = sizeof (int);
if (handle_to_fn (handle, name))
/* ok */;
else if (strcmp (name, ":sock:") == 0
/* On NT4, NtQueryObject returns STATUS_NOT_IMPLEMENTED when
called for a socket handle. */
|| (strcmp (name, unknown_file) == 0
&& !::getsockopt ((SOCKET) handle, SOL_SOCKET, SO_RCVBUF,
(char *) &rcv, &len)))
{
/* socket */
dev = *tcp_dev;
name[0] = '\0';
}
else if (fd == 0)
dev = *piper_dev;
else
@ -318,9 +329,6 @@ dtable::init_std_file_from_handle (int fd, HANDLE handle)
else
dev = *console_dev;
}
else if (wsock_started && getpeername ((SOCKET) handle, &sa, &sal) == 0)
/* socket */
dev = *tcp_dev;
else if (GetCommState (handle, &dcb))
/* serial */
dev.parse (DEV_TTYS_MAJOR, 0);
@ -881,122 +889,118 @@ handle_to_fn (HANDLE h, char *posix_fn)
{
tmp_pathbuf tp;
ULONG len = 0;
OBJECT_NAME_INFORMATION dummy_oni;
WCHAR *maxmatchdos = NULL;
int maxmatchlen = 0;
OBJECT_NAME_INFORMATION *ntfn = (OBJECT_NAME_INFORMATION *) tp.w_get ();
NTSTATUS status = NtQueryObject (h, ObjectNameInformation, &dummy_oni,
sizeof (dummy_oni), &len);
if (!NT_SUCCESS (status) || !len)
debug_printf ("NtQueryObject failed 1");
NTSTATUS status = NtQueryObject (h, ObjectNameInformation, ntfn, 65536, &len);
if (!NT_SUCCESS (status))
debug_printf ("NtQueryObject failed, %p", status);
// NT seems to do this on an unopened file
else if (!ntfn->Name.Buffer)
debug_printf ("nt->Name.Buffer == NULL");
else
{
OBJECT_NAME_INFORMATION *ntfn = (OBJECT_NAME_INFORMATION *) alloca (len + sizeof (WCHAR));
NTSTATUS res = NtQueryObject (h, ObjectNameInformation, ntfn, len, NULL);
WCHAR *w32 = ntfn->Name.Buffer;
size_t w32len = ntfn->Name.Length / sizeof (WCHAR);
w32[w32len] = L'\0';
if (!NT_SUCCESS (res))
debug_printf ("NtQueryObject failed 2");
// NT seems to do this on an unopened file
else if (!ntfn->Name.Buffer)
debug_printf ("nt->Name.Buffer == NULL");
else
if (wcscasecmp (w32, DEV_NULL) == 0)
{
WCHAR *w32 = ntfn->Name.Buffer;
size_t w32len = ntfn->Name.Length / sizeof (WCHAR);
w32[w32len] = L'\0';
if (wcscasecmp (w32, DEV_NULL) == 0)
{
strcpy (posix_fn, "/dev/null");
return false;
}
if (wcsncasecmp (w32, DEV_NAMED_PIPE, DEV_NAMED_PIPE_LEN) == 0)
{
w32 += DEV_NAMED_PIPE_LEN;
if (wcsncmp (w32, L"cygwin-", WCLEN (L"cygwin-")) != 0)
return false;
w32 += WCLEN (L"cygwin-");
bool istty = wcsncmp (w32, L"tty", WCLEN (L"tty")) == 0;
if (istty)
decode_tty (posix_fn, w32 + WCLEN (L"tty"));
else if (wcsncmp (w32, L"pipe", WCLEN (L"pipe")) == 0)
strcpy (posix_fn, "/dev/pipe");
return istty;
}
WCHAR fnbuf[64 * 1024];
if (wcsncasecmp (w32, DEVICE_PREFIX, DEVICE_PREFIX_LEN) != 0
|| !QueryDosDeviceW (NULL, fnbuf, sizeof (fnbuf)))
{
sys_wcstombs (posix_fn, NT_MAX_PATH, w32, w32len);
return false;
}
for (WCHAR *s = fnbuf; *s; s = wcschr (s, '\0') + 1)
{
WCHAR device[NT_MAX_PATH];
if (!QueryDosDeviceW (s, device, sizeof (device)))
continue;
if (wcschr (s, ':') == NULL)
continue;
WCHAR *q = wcsrchr (device, ';');
if (q)
{
WCHAR *r = wcschr (q, '\\');
if (r)
wcscpy (q, r + 1);
}
int devlen = wcslen (device);
if (device[devlen - 1] == L'\\')
device[--devlen] = L'\0';
if (devlen < maxmatchlen)
continue;
if (wcsncmp (device, w32, devlen) != 0||
(w32[devlen] != L'\0' && w32[devlen] != L'\\'))
continue;
maxmatchlen = devlen;
maxmatchdos = s;
debug_printf ("current match '%W' = '%W'\n", s, device);
}
if (maxmatchlen)
{
WCHAR *p = wcschr (w32 + DEVICE_PREFIX_LEN, L'\\');
size_t n = wcslen (maxmatchdos);
WCHAR ch;
if (!p)
ch = L'\0';
else
{
if (maxmatchdos[n - 1] == L'\\')
n--;
w32 += maxmatchlen - n;
ch = L'\\';
}
memcpy (w32, maxmatchdos, n * sizeof (WCHAR));
w32[n] = ch;
}
else if (wcsncmp (w32, DEV_REMOTE, DEV_REMOTE_LEN) == 0)
{
w32 += DEV_REMOTE_LEN - 2;
*w32 = L'\\';
debug_printf ("remote drive");
}
else if (wcsncmp (w32, DEV_REMOTE1, DEV_REMOTE1_LEN) == 0)
{
w32 += DEV_REMOTE1_LEN - 2;
*w32 = L'\\';
debug_printf ("remote drive");
}
cygwin_conv_path (CCP_WIN_W_TO_POSIX | CCP_ABSOLUTE, w32, posix_fn,
NT_MAX_PATH);
debug_printf ("derived path '%W', posix '%s'", w32, posix_fn);
strcpy (posix_fn, "/dev/null");
return false;
}
if (wcscasecmp (w32, DEV_SOCKET) == 0)
{
strcpy (posix_fn, ":sock:");
return false;
}
if (wcsncasecmp (w32, DEV_NAMED_PIPE, DEV_NAMED_PIPE_LEN) == 0)
{
w32 += DEV_NAMED_PIPE_LEN;
if (wcsncmp (w32, L"cygwin-", WCLEN (L"cygwin-")) != 0)
return false;
w32 += WCLEN (L"cygwin-");
bool istty = wcsncmp (w32, L"tty", WCLEN (L"tty")) == 0;
if (istty)
decode_tty (posix_fn, w32 + WCLEN (L"tty"));
else if (wcsncmp (w32, L"pipe", WCLEN (L"pipe")) == 0)
strcpy (posix_fn, "/dev/pipe");
return istty;
}
WCHAR fnbuf[64 * 1024];
if (wcsncasecmp (w32, DEVICE_PREFIX, DEVICE_PREFIX_LEN) != 0
|| !QueryDosDeviceW (NULL, fnbuf, sizeof (fnbuf)))
{
sys_wcstombs (posix_fn, NT_MAX_PATH, w32, w32len);
return false;
}
for (WCHAR *s = fnbuf; *s; s = wcschr (s, '\0') + 1)
{
WCHAR device[NT_MAX_PATH];
if (!QueryDosDeviceW (s, device, sizeof (device)))
continue;
if (wcschr (s, ':') == NULL)
continue;
WCHAR *q = wcsrchr (device, ';');
if (q)
{
WCHAR *r = wcschr (q, '\\');
if (r)
wcscpy (q, r + 1);
}
int devlen = wcslen (device);
if (device[devlen - 1] == L'\\')
device[--devlen] = L'\0';
if (devlen < maxmatchlen)
continue;
if (wcsncmp (device, w32, devlen) != 0||
(w32[devlen] != L'\0' && w32[devlen] != L'\\'))
continue;
maxmatchlen = devlen;
maxmatchdos = s;
debug_printf ("current match '%W' = '%W'\n", s, device);
}
if (maxmatchlen)
{
WCHAR *p = wcschr (w32 + DEVICE_PREFIX_LEN, L'\\');
size_t n = wcslen (maxmatchdos);
WCHAR ch;
if (!p)
ch = L'\0';
else
{
if (maxmatchdos[n - 1] == L'\\')
n--;
w32 += maxmatchlen - n;
ch = L'\\';
}
memcpy (w32, maxmatchdos, n * sizeof (WCHAR));
w32[n] = ch;
}
else if (wcsncmp (w32, DEV_REMOTE, DEV_REMOTE_LEN) == 0)
{
w32 += DEV_REMOTE_LEN - 2;
*w32 = L'\\';
debug_printf ("remote drive");
}
else if (wcsncmp (w32, DEV_REMOTE1, DEV_REMOTE1_LEN) == 0)
{
w32 += DEV_REMOTE1_LEN - 2;
*w32 = L'\\';
debug_printf ("remote drive");
}
cygwin_conv_path (CCP_WIN_W_TO_POSIX | CCP_ABSOLUTE, w32, posix_fn,
NT_MAX_PATH);
debug_printf ("derived path '%W', posix '%s'", w32, posix_fn);
return false;
}
strcpy (posix_fn, unknown_file);