* autoload.cc (NtSetSecurityObject): Add.

* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Only request
	READ_CONTROL rights when opening the file.
	* ntdll.h (NtSetSecurityObject): Add declaration.
	* security.cc (write_sd): Call NtSetSecurityObject instead of
	BackupWrite.
	(get_nt_object_security): Don't free security descriptor here.

	* syscalls.cc (ttyname): Use buffer of length TTY_NAME_MAX + 1.
	* sysconf.cc (sysconf): Handle _SC_TTY_NAME_MAX request.
	* include/limits.h: Define TTY_NAME_MAX and _POSIX_TTY_NAME_MAX.

winsup/cygwin/ChangeLog

@@ -1,3 +1,19 @@
+2004-04-14  Corinna Vinschen  <corinna@vinschen.de>
+
+	* autoload.cc (NtSetSecurityObject): Add.
+	* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Only request
+	READ_CONTROL rights when opening the file.
+	* ntdll.h (NtSetSecurityObject): Add declaration.
+	* security.cc (write_sd): Call NtSetSecurityObject instead of
+	BackupWrite.
+	(get_nt_object_security): Don't free security descriptor here.
+
+2004-04-14  Corinna Vinschen  <corinna@vinschen.de>
+
+	* syscalls.cc (ttyname): Use buffer of length TTY_NAME_MAX + 1.
+	* sysconf.cc (sysconf): Handle _SC_TTY_NAME_MAX request.
+	* include/limits.h: Define TTY_NAME_MAX and _POSIX_TTY_NAME_MAX.
+
 2004-04-14  Corinna Vinschen  <corinna@vinschen.de>
 
 	* cygwin.din: Export rand_r and ttyname_r.

winsup/cygwin/autoload.cc

@@ -394,6 +394,7 @@ LoadDLLfuncEx2 (NtQueryObject, 20, ntdll, 1, 1)
 LoadDLLfuncEx (NtQuerySystemInformation, 16, ntdll, 1)
 LoadDLLfuncEx (NtQuerySecurityObject, 20, ntdll, 1)
 LoadDLLfuncEx (NtQueryVirtualMemory, 24, ntdll, 1)
+LoadDLLfuncEx (NtSetSecurityObject, 12, ntdll, 1)
 LoadDLLfuncEx (NtUnmapViewOfSection, 8, ntdll, 1)
 LoadDLLfuncEx (RtlInitUnicodeString, 8, ntdll, 1)
 LoadDLLfuncEx (RtlNtStatusToDosError, 4, ntdll, 1)

winsup/cygwin/fhandler_disk_file.cc

@@ -377,7 +377,8 @@ fhandler_disk_file::fchmod (mode_t mode)
   if (pc.is_fs_special ())
     return chmod_device (pc, mode);
 
-  if (!get_io_handle () && !(oret = open_fs (O_RDONLY | O_BINARY, 0)))
+  query_open (query_read_control);
+  if (!get_io_handle () && !(oret = open_fs (O_BINARY, 0)))
     return -1;
 
   SetFileAttributes (get_win32_name (), (DWORD) pc & ~FILE_ATTRIBUTE_READONLY);

winsup/cygwin/include/limits.h

@@ -151,6 +151,10 @@ details. */
 #undef TIMER_MAX
 #define TIMER_MAX 32
 
+/* Maximum number of characters in a tty name. */
+#undef TTY_NAME_MAX
+#define TTY_NAME_MAX 12
+
 /* POSIX values */
 /* These should never vary from one system type to another */
 /* They represent the minimum values that POSIX systems must support.
@@ -170,6 +174,7 @@ details. */
 #define _POSIX_TZNAME_MAX       3
 #define _POSIX_RTSIG_MAX	8
 #define _POSIX_TIMER_MAX	32
+#define _POSIX_TTY_NAME_MAX	9
 
 #define RTSIG_MAX		_POSIX_RTSIG_MAX
 

winsup/cygwin/ntdll.h

@@ -412,6 +412,8 @@ extern "C"
   					PSECURITY_DESCRIPTOR, ULONG, PULONG);
   NTSTATUS NTAPI NtQueryVirtualMemory (HANDLE, PVOID, MEMORY_INFORMATION_CLASS,
 				       PVOID, ULONG, PULONG);
+  NTSTATUS NTAPI NtSetSecurityObject (HANDLE, SECURITY_INFORMATION,
+				      PSECURITY_DESCRIPTOR);
   NTSTATUS NTAPI NtUnmapViewOfSection (HANDLE, PVOID);
   VOID NTAPI RtlInitUnicodeString (PUNICODE_STRING, PCWSTR);
   ULONG NTAPI RtlNtStatusToDosError (NTSTATUS);

winsup/cygwin/security.cc

@@ -1141,64 +1141,33 @@ write_sd (const char *file, security_descriptor &sd)
   else
     res = saved_res;
   if (res == 1 && owner != cygheap->user.sid ())
+    {
+      set_errno (EPERM);
       return -1;
-
+    }
   HANDLE fh;
-  fh = CreateFile (file,
+  if ((fh = CreateFile (file,
 		        WRITE_OWNER | WRITE_DAC,
 		        FILE_SHARE_READ | FILE_SHARE_WRITE,
 		        &sec_none_nih,
 		        OPEN_EXISTING,
 		        FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS,
-		   NULL);
+		        NULL)) == INVALID_HANDLE_VALUE)
-
-  if (fh == INVALID_HANDLE_VALUE)
     {
       __seterrno ();
       return -1;
     }
-
+  NTSTATUS ret = NtSetSecurityObject (fh,
-  LPVOID context = NULL;
+				      DACL_SECURITY_INFORMATION 
-  DWORD bytes_written = 0;
+				      | GROUP_SECURITY_INFORMATION
-  WIN32_STREAM_ID header;
+				      | OWNER_SECURITY_INFORMATION,
-
+				      sd);
-  memset (&header, 0, sizeof (header));
-  /* write new security info header */
-  header.dwStreamId = BACKUP_SECURITY_DATA;
-  header.dwStreamAttributes = STREAM_CONTAINS_SECURITY;
-  header.Size.HighPart = 0;
-  header.Size.LowPart = sd.size ();
-  header.dwStreamNameSize = 0;
-  if (!BackupWrite (fh, (LPBYTE) &header,
-		    3 * sizeof (DWORD) + sizeof (LARGE_INTEGER),
-		    &bytes_written, FALSE, TRUE, &context))
-    {
-      __seterrno ();
   CloseHandle (fh);
+  if (ret != STATUS_SUCCESS)
+    {
+      __seterrno_from_win_error (RtlNtStatusToDosError (ret));
       return -1;
     }
-
-  /* write new security descriptor */
-  if (!BackupWrite (fh, (LPBYTE) (PSECURITY_DESCRIPTOR) sd,
-		    header.Size.LowPart + header.dwStreamNameSize,
-		    &bytes_written, FALSE, TRUE, &context))
-    {
-      /* Samba returns ERROR_NOT_SUPPORTED.
-	 FAT returns ERROR_INVALID_SECURITY_DESCR.
-	 This shouldn't return as error, but better be ignored. */
-      DWORD ret = GetLastError ();
-      if (ret != ERROR_NOT_SUPPORTED && ret != ERROR_INVALID_SECURITY_DESCR)
-	{
-	  __seterrno ();
-	  BackupWrite (fh, NULL, 0, &bytes_written, TRUE, TRUE, &context);
-	  CloseHandle (fh);
-	  return -1;
-	}
-    }
-
-  /* terminate the restore process */
-  BackupWrite (fh, NULL, 0, &bytes_written, TRUE, TRUE, &context);
-  CloseHandle (fh);
   return 0;
 }
 
@@ -1391,7 +1360,6 @@ get_nt_object_security (HANDLE handle, SE_OBJECT_TYPE object_type,
     }
   if (ret != STATUS_SUCCESS)
     {
-      sd_ret.free ();
       __seterrno_from_win_error (RtlNtStatusToDosError (ret));
       return -1;
     }

winsup/cygwin/syscalls.cc

@@ -1536,8 +1536,8 @@ ttyname_r (int fd, char *buf, size_t buflen)
 extern "C" char *
 ttyname (int fd)
 {
-  static char name[CYG_MAX_PATH];
+  static char name[TTY_NAME_MAX + 1];
-  int ret = ttyname_r (fd, name, CYG_MAX_PATH);
+  int ret = ttyname_r (fd, name, TTY_NAME_MAX + 1);
   if (ret)
     {
       set_errno (ret);

winsup/cygwin/sysconf.cc

@@ -122,6 +122,8 @@ sysconf (int in)
 	  }
       case _SC_RTSIG_MAX:
 	return RTSIG_MAX;
+      case _SC_TTY_NAME_MAX:
+        return TTY_NAME_MAX;
     }
 
   /* Invalid input or unimplemented sysconf name */