hfs-195.tar.gz

[apple/hfs.git] / CopyHFSMeta / SparseBundle.c

diff --git a/CopyHFSMeta/SparseBundle.c b/CopyHFSMeta/SparseBundle.c
index e342d470bcb45df8a6f4bed6fcc0cd3f5ff28423..1ac5a6889f0d3474a7bb4227615ecd0b63793fe5 100644 (file)
--- a/CopyHFSMeta/SparseBundle.c
+++ b/CopyHFSMeta/SparseBundle.c
@@ -10,6 +10,7 @@
 #include <removefile.h>
 
 #include <CoreFoundation/CoreFoundation.h>
+#include <System/sys/fsctl.h> 
 
 #include "hfsmeta.h"
 #include "Sparse.h"
@@ -59,6 +60,21 @@ static const char *bundlePrototype =
 "</dict>\n"
        "</plist>\n";
 
+/*
+ * Do a per-volume sync.  We use this just before updating the progress file, so
+ * that any changes -- data and metadata -- will have made it to disk, without
+ * causing a sync of every mounted volume.
+ *
+ */
+
+static void
+sync_volume(const char *path) {
+        int full_sync = FSCTL_SYNC_FULLSYNC | FSCTL_SYNC_WAIT;
+
+        (void)fsctl(path, FSCTL_SYNC_VOLUME, &full_sync, 0);
+        return;
+}
+
 /*
  * Read from a sparse bundle.  If the band file doesn't exist, or is shorter than
  * what we need to get from it, we pad out with 0's.
@@ -156,7 +172,6 @@ doSparseWrite(IOWrapper_t *context, off_t offset, void *buffer, size_t len)
                        retval = -1;
                        goto done;
                }
-               (void)fcntl(fd, F_FULLFSYNC, 0);
                written += nwritten;
        }
        retval = written;
@@ -326,6 +341,7 @@ SetProgress(struct IOWrapper *context, off_t prog)
        } else {
                fp = fopen(progFile, "w");
                if (fp) {
+                       sync_volume(ctx->pathname);
                        (void)fprintf(fp, "%llu\n", prog);
                        fclose(fp);
                }