Second try at fsyncing directories in CREATE DATABASE. Let's see what the build farm...

diff --git a/src/port/copydir.c b/src/port/copydir.c
index e1675b6..0be1260 100644 (file)
--- a/src/port/copydir.c
+++ b/src/port/copydir.c
@@ -11,7 +11,7 @@
  *     as a service.
  *
  * IDENTIFICATION
- *       $PostgreSQL: pgsql/src/port/copydir.c,v 1.33 2010/02/26 02:01:38 momjian Exp $
+ *       $PostgreSQL: pgsql/src/port/copydir.c,v 1.34 2010/02/28 21:05:30 stark Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -37,7 +37,7 @@
 
 
 static void copy_file(char *fromfile, char *tofile);
-static void fsync_fname(char *fname);
+static void fsync_fname(char *fname, bool isdir);
 
 
 /*
@@ -121,22 +121,17 @@ copydir(char *fromdir, char *todir, bool recurse)
                                         errmsg("could not stat file \"%s\": %m", tofile)));
 
                if (S_ISREG(fst.st_mode))
-                       fsync_fname(tofile);
+                       fsync_fname(tofile, false);
        }
        FreeDir(xldir);
 
-#ifdef NOTYET
-
        /*
         * It's important to fsync the destination directory itself as individual
         * file fsyncs don't guarantee that the directory entry for the file is
         * synced. Recent versions of ext4 have made the window much wider but
         * it's been true for ext3 and other filesystems in the past.
-        *
-        * However we can't do this just yet, it has portability issues.
         */
-       fsync_fname(todir);
-#endif
+       fsync_fname(todir, true);
 }
 
 /*
@@ -216,20 +211,48 @@ copy_file(char *fromfile, char *tofile)
 
 /*
  * fsync a file
+ *
+ * Try to fsync directories but ignore errors that indicate the OS
+ * just doesn't allow/require fsyncing directories.
  */
 static void
-fsync_fname(char *fname)
+fsync_fname(char *fname, bool isdir)
 {
-       int                     fd = BasicOpenFile(fname,
-                                                                  O_RDWR | PG_BINARY,
-                                                                  S_IRUSR | S_IWUSR);
+       int                     fd;
+       int             returncode;
 
-       if (fd < 0)
+       /* Some OSs require directories to be opened read-only whereas
+        * other systems don't allow us to fsync files opened read-only so
+        * we need both cases here 
+        */
+       if (!isdir)
+               fd = BasicOpenFile(fname,
+                                                  O_RDWR | PG_BINARY,
+                                                  S_IRUSR | S_IWUSR);
+       else
+               fd = BasicOpenFile(fname,
+                                                  O_RDONLY | PG_BINARY,
+                                                  S_IRUSR | S_IWUSR);
+
+       /* Some OSs don't allow us to open directories at all */
+       if (fd < 0 && isdir && errno == EISDIR)
+               return;
+
+       else if (fd < 0)
                ereport(ERROR,
                                (errcode_for_file_access(),
                                 errmsg("could not open file \"%s\": %m", fname)));
 
-       if (pg_fsync(fd) != 0)
+       returncode = pg_fsync(fd);
+       
+       /* Some OSs don't allow us to fsync directories at all */
+       if (returncode != 0 && isdir && errno == EBADF)
+       {
+               close(fd);
+               return;
+       }
+
+       if (returncode != 0)
                ereport(ERROR,
                                (errcode_for_file_access(),
                                 errmsg("could not fsync file \"%s\": %m", fname)));