* fhandler.h (fhandler_base::ftruncate): Define new virtual method.

(fhandler_disk_file::ftruncate): Ditto.
	* fhandler.cc (fhandler_base::ftruncate): New method.
	* fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto.
	* syscalls.cc (ftruncate64): Move functionality into fhandlers.
	Call fhandler method from here.

winsup/cygwin/ChangeLog

@@ -1,3 +1,12 @@
+2005-02-02  Corinna Vinschen  <corinna@vinschen.de>
+
+	* fhandler.h (fhandler_base::ftruncate): Define new virtual method.
+	(fhandler_disk_file::ftruncate): Ditto.
+	* fhandler.cc (fhandler_base::ftruncate): New method.
+	* fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto.
+	* syscalls.cc (ftruncate64): Move functionality into fhandlers.
+	Call fhandler method from here.
+
 2005-02-02  Corinna Vinschen  <corinna@vinschen.de>
 
 	* pipe.cc (fhandler_pipe::dup): Fix conditionals in case of error.

winsup/cygwin/fhandler.cc

@@ -1,6 +1,7 @@
 /* fhandler.cc.  See console.cc for fhandler_console functions.
 
-   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.
+   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+   2005 Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -814,8 +815,8 @@ fhandler_base::write (const void *ptr, size_t len)
 	      HANDLE h = get_output_handle ();
 	      BOOL r = DeviceIoControl (h, FSCTL_SET_SPARSE, NULL, 0, NULL,
 					0, &dw, NULL);
-	      syscall_printf ("%d = DeviceIoControl(%p, FSCTL_SET_SPARSE, "
-			      "NULL, 0, NULL, 0, &dw, NULL)", r, h);
+	      syscall_printf ("%d = DeviceIoControl(%p, FSCTL_SET_SPARSE)",
+			      r, h);
 	    }
 	  else if (wincap.has_lseek_bug ())
 	    {
@@ -1595,3 +1596,10 @@ fhandler_base::facl (int cmd, int nentries, __aclent32_t *aclbufp)
     }
   return res;
 }
+
+int
+fhandler_base::ftruncate (_off64_t length)
+{
+  set_errno (EINVAL);
+  return -1;
+}

winsup/cygwin/fhandler.h

@@ -1,6 +1,7 @@
 /* fhandler.h
 
-   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.
+   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+   2005 Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -250,6 +251,7 @@ class fhandler_base
   virtual int __stdcall fchmod (mode_t mode) __attribute__ ((regparm (1)));
   virtual int __stdcall fchown (__uid32_t uid, __gid32_t gid) __attribute__ ((regparm (2)));
   virtual int __stdcall facl (int, int, __acl32 *) __attribute__ ((regparm (3)));
+  virtual int __stdcall ftruncate (_off64_t) __attribute__ ((regparm (2)));
   virtual int ioctl (unsigned int cmd, void *);
   virtual int fcntl (int cmd, void *);
   virtual char const *ttyname () { return get_name (); }
@@ -590,6 +592,7 @@ class fhandler_disk_file: public fhandler_base
   int __stdcall fchmod (mode_t mode) __attribute__ ((regparm (1)));
   int __stdcall fchown (__uid32_t uid, __gid32_t gid) __attribute__ ((regparm (2)));
   int __stdcall facl (int, int, __acl32 *) __attribute__ ((regparm (3)));
+  int __stdcall ftruncate (_off64_t) __attribute__ ((regparm (2)));
 
   HANDLE mmap (caddr_t *addr, size_t len, DWORD access, int flags, _off64_t off);
   int munmap (HANDLE h, caddr_t addr, size_t len);

winsup/cygwin/fhandler_disk_file.cc

@@ -29,6 +29,7 @@ details. */
 #include "ntdll.h"
 #include <assert.h>
 #include <ctype.h>
+#include <winioctl.h>
 
 #define _COMPILING_NEWLIB
 #include <dirent.h>
@@ -589,6 +590,53 @@ fhandler_disk_file::facl (int cmd, int nentries, __aclent32_t *aclbufp)
   return res;
 }
 
+int
+fhandler_disk_file::ftruncate (_off64_t length)
+{
+  int res = -1, res_bug = 0;
+
+  if (length < 0 || !get_output_handle ())
+    set_errno (EINVAL);
+  else if (pc.isdir ())
+    set_errno (EISDIR);
+  else if (!(get_access () & GENERIC_WRITE))
+    set_errno (EBADF);
+  else
+    {
+      _off64_t prev_loc = lseek (0, SEEK_CUR);
+      if (lseek (length, SEEK_SET) > 0)
+        {
+	  if (get_fs_flags (FILE_SUPPORTS_SPARSE_FILES))
+	    {
+	      _off64_t actual_length;
+	      DWORD size_high = 0;
+	      actual_length = GetFileSize (get_output_handle (), &size_high);
+	      actual_length += ((_off64_t) size_high) << 32;
+	      if (length >= actual_length + (128 * 1024))
+	        {
+		  DWORD dw;
+		  BOOL r = DeviceIoControl (get_output_handle (),
+					    FSCTL_SET_SPARSE, NULL, 0, NULL,
+					    0, &dw, NULL);
+		  syscall_printf ("%d = DeviceIoControl(%p, FSCTL_SET_SPARSE)",
+		  		  r, get_output_handle ());
+	        }
+	    }
+	  else if (wincap.has_lseek_bug ())
+	    res_bug = write (&res, 0);
+	  if (!SetEndOfFile (get_output_handle ()))
+	    __seterrno ();
+	  else
+	    res = res_bug;
+	  /* restore original file pointer location */
+	  lseek (prev_loc, SEEK_SET);
+	  if (!res)
+	    touch_ctime ();
+	}
+    }
+  return res;
+}
+
 fhandler_disk_file::fhandler_disk_file () :
   fhandler_base ()
 {

winsup/cygwin/syscalls.cc

@@ -1737,37 +1737,12 @@ setmode (int fd, int mode)
 extern "C" int
 ftruncate64 (int fd, _off64_t length)
 {
-  int res = -1, res_bug = 0;
-
-  if (length < 0)
-    set_errno (EINVAL);
+  int res = -1;
+  cygheap_fdget cfd (fd);
+  if (cfd >= 0)
+    res = cfd->ftruncate (length);
   else
-    {
-      cygheap_fdget cfd (fd);
-      if (cfd >= 0)
-	{
-	  HANDLE h = cygheap->fdtab[fd]->get_handle ();
-
-	  if (cfd->get_handle ())
-	    {
-	      /* remember curr file pointer location */
-	      _off64_t prev_loc = cfd->lseek (0, SEEK_CUR);
-
-	      cfd->lseek (length, SEEK_SET);
-	      /* Fill the space with 0, if needed */
-	      if (wincap.has_lseek_bug ())
-		res_bug = cfd->write (&res, 0);
-	      if (!SetEndOfFile (h))
-		__seterrno ();
-	      else
-		res = res_bug;
-
-	      /* restore original file pointer location */
-	      cfd->lseek (prev_loc, SEEK_SET);
-	    }
-	}
-    }
-
+    set_errno (EBADF);
   syscall_printf ("%d = ftruncate (%d, %D)", res, fd, length);
   return res;
 }