Use ftruncate() not truncate() in mdunlink. Seems Windows doesn't

[postgresql] / src / backend / storage / smgr / md.c

diff --git a/src/backend/storage/smgr/md.c b/src/backend/storage/smgr/md.c
index 0ae0d0daf6b8d7f8abfb4f6321703e03a4320dd7..0211b3f74e7905b09ca07646a89f82ce97b343a4 100644 (file)
--- a/src/backend/storage/smgr/md.c
+++ b/src/backend/storage/smgr/md.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $PostgreSQL: pgsql/src/backend/storage/smgr/md.c,v 1.131 2007/11/15 21:14:38 momjian Exp $
+ *       $PostgreSQL: pgsql/src/backend/storage/smgr/md.c,v 1.132 2007/11/15 21:49:47 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -316,7 +316,23 @@ mdunlink(RelFileNode rnode, bool isRedo)
        if (isRedo)
                ret = unlink(path);
        else
-               ret = truncate(path, 0);
+       {
+               /* truncate(2) would be easier here, but Windows hasn't got it */
+               int             fd;
+
+               fd = BasicOpenFile(path, O_RDWR | PG_BINARY, 0);
+               if (fd >= 0)
+               {
+                       int             save_errno;
+
+                       ret = ftruncate(fd, 0);
+                       save_errno = errno;
+                       close(fd);
+                       errno = save_errno;
+               }
+               else
+                       ret = -1;
+       }
        if (ret < 0)
        {
                if (!isRedo || errno != ENOENT)