CreateNamedPipe questions
Dan Kegel
dank at kegel.com
Thu Feb 13 01:55:48 CST 2003
Oddly enough, it looks like it's ok to pass
NULL as the filename to CreateNamedPipe.
Anyone know what programs do that, and why?
Here's a patch that makes our CreateNamedPipe check
for legal filenames (or NULL). It should probably
allow forward slashes...
The patch also adds a quickie regression test,
but I still have to use late binding for CreateNamedPipe
(or is it ok for the test to fail on win9x?).
Would this test have caught the recent named pipe breakage?
If not, what would I need to add?
Comments welcome; I'll send it to wine-patches
after addressing any feedback.
- Dan
--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
-------------- next part --------------
Index: dlls/kernel/sync.c
===================================================================
RCS file: /home/wine/wine/dlls/kernel/sync.c,v
retrieving revision 1.26
diff -u -p -u -r1.26 sync.c
--- dlls/kernel/sync.c 25 Oct 2002 21:02:30 -0000 1.26
+++ dlls/kernel/sync.c 13 Feb 2003 07:47:27 -0000
@@ -508,6 +508,8 @@ HANDLE WINAPI CreateNamedPipeW( LPCWSTR
{
HANDLE ret;
DWORD len = name ? strlenW(name) : 0;
+ static const WCHAR leadin[] = {'\\','\\','.','\\','P','I','P','E'};
+ int i;
TRACE("(%s, %#08lx, %#08lx, %ld, %ld, %ld, %ld, %p)\n",
debugstr_w(name), dwOpenMode, dwPipeMode, nMaxInstances,
@@ -516,7 +518,13 @@ HANDLE WINAPI CreateNamedPipeW( LPCWSTR
if (len >= MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
- return 0;
+ return INVALID_HANDLE_VALUE;
+ }
+ /* FIXME: can name really be NULL?! */
+ if (name && strncmpiW(name, leadin, sizeof(leadin)/sizeof(leadin[0])))
+ {
+ SetLastError( ERROR_INVALID_NAME );
+ return INVALID_HANDLE_VALUE;
}
SERVER_START_REQ( create_named_pipe )
{
Index: dlls/kernel/tests/Makefile.in
===================================================================
RCS file: /home/wine/wine/dlls/kernel/tests/Makefile.in,v
retrieving revision 1.6
diff -u -p -u -r1.6 Makefile.in
--- dlls/kernel/tests/Makefile.in 4 Oct 2002 17:42:27 -0000 1.6
+++ dlls/kernel/tests/Makefile.in 13 Feb 2003 07:47:27 -0000
@@ -17,6 +17,7 @@ CTESTS = \
generated.c \
locale.c \
path.c \
+ pipe.c \
process.c \
thread.c
--- /dev/null 2002-08-30 16:31:37.000000000 -0700
+++ dlls/kernel/tests/pipe.c 2003-02-12 23:44:20.000000000 -0800
@@ -0,0 +1,109 @@
+/*
+ * Unit tests for named pipe functions in Wine
+ *
+ * Copyright (c) 2002 Dan Kegel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#ifndef STANDALONE
+#include "wine/test.h"
+#else
+#include <assert.h>
+#define START_TEST(name) main(int argc, char **argv)
+#define ok(condition, msg) assert(condition)
+#endif
+
+#include <windef.h>
+#include <winbase.h>
+#include <winerror.h>
+#include <wtypes.h>
+
+#define PIPENAME "\\\\.\\PiPe\\tests_" __FILE__
+
+void test_CreateNamedPipeA(void)
+{
+ HANDLE hnp;
+ HANDLE hFile;
+ const char obuf[] = "Bit Bucket";
+ char ibuf[32];
+ DWORD written;
+ DWORD gelesen;
+
+ /* Bad parameter checks */
+ hnp = CreateNamedPipeA("not a named pipe",
+ PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE|PIPE_WAIT,
+ /* nMaxInstances */ 1,
+ /* nOutBufSize */ 1024,
+ /* nInBufSize */ 1024,
+ /* nDefaultWait */ NMPWAIT_USE_DEFAULT_WAIT,
+ /* lpSecurityAttrib */ NULL);
+
+ ok(hnp == INVALID_HANDLE_VALUE && GetLastError() == ERROR_INVALID_NAME,
+ "CreateNamedPipe should fail if name doesn't start with \\\\.\\pipe");
+
+#if 0 /* Evidently it's ok in windows to pass NULL as the pipe name! */
+ hnp = CreateNamedPipeA(NULL,
+ PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE|PIPE_WAIT,
+ 1, 1024, 1024, NMPWAIT_USE_DEFAULT_WAIT, NULL);
+ ok(hnp == INVALID_HANDLE_VALUE && GetLastError() == ERROR_INVALID_NAME,
+ "CreateNamedPipe should fail if name is NULL");
+#endif
+
+ /* Functional checks */
+
+ hnp = CreateNamedPipeA(PIPENAME,
+ PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE|PIPE_WAIT,
+ /* nMaxInstances */ 1,
+ /* nOutBufSize */ 1024,
+ /* nInBufSize */ 1024,
+ /* nDefaultWait */ NMPWAIT_USE_DEFAULT_WAIT,
+ /* lpSecurityAttrib */ NULL);
+ ok(hnp != INVALID_HANDLE_VALUE, "CreateNamedPipe failed");
+
+ hFile = CreateFileA(PIPENAME, GENERIC_READ|GENERIC_WRITE, 0,
+ NULL, OPEN_EXISTING, 0, 0);
+ ok(hFile != INVALID_HANDLE_VALUE, "CreateFile failed");
+ if (hFile == INVALID_HANDLE_VALUE)
+ return;
+
+ /* Make sure we can read and write a few bytes in both directions*/
+ memset(ibuf, 0, sizeof(ibuf));
+ ok(WriteFile(hnp, obuf, sizeof(obuf), &written, NULL), "WriteFile");
+ ok(written == sizeof(obuf), "write file len");
+ ok(ReadFile(hFile, ibuf, sizeof(obuf), &gelesen, NULL), "ReadFile");
+ ok(gelesen == sizeof(obuf), "read file len");
+ ok(memcmp(obuf, ibuf, written) == 0, "content check");
+
+ memset(ibuf, 0, sizeof(ibuf));
+ ok(WriteFile(hFile, obuf, sizeof(obuf), &written, NULL), "WriteFile");
+ ok(written == sizeof(obuf), "write file len");
+ ok(ReadFile(hnp, ibuf, sizeof(obuf), &gelesen, NULL), "ReadFile");
+ ok(gelesen == sizeof(obuf), "read file len");
+ ok(memcmp(obuf, ibuf, written) == 0, "content check");
+
+ CloseHandle(hFile);
+ CloseHandle(hnp);
+}
+
+START_TEST(pipe)
+{
+ test_CreateNamedPipeA();
+}
+
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