Check if the output file already exists - and open it in append mode then.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusPUGHIO/IOHDF5/trunk@106 4825ed28-b72c-4eae-9704-e50c059e567d

1 files changed, 8 insertions, 3 deletions

diff --git a/src/util/hdf5_extract.c b/src/util/hdf5_extract.c
index 5f1caf0..70e63b4 100644
--- a/src/util/hdf5_extract.c
+++ b/src/util/hdf5_extract.c
@@ -124,8 +124,13 @@ int main (int argc, char *argv[])
       return (-1);
     }
 
-    /* create output file */
-    outfile = H5Fcreate (argv[3], H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    /* try to open an existing outfile file in append mode,
+       if this fails create it as a new file */
+    outfile = H5Fopen (argv[3], H5F_ACC_RDWR, H5P_DEFAULT);
+    if (outfile < 0)
+    {
+      outfile = H5Fcreate (argv[3], H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    }
     if (outfile < 0)
     {
       fprintf (stderr, "ERROR: Cannot create HDF5 output file '%s' !\n\n",
@@ -239,7 +244,7 @@ static herr_t CopyObject (hid_t from,
   if (result < 0)
   {
     fprintf (stderr, "WARNING: object '%s' will not be extracted (object "
-                     "does't exist)\n", objectname);
+                     "doesn't exist)\n", objectname);
     nerrors++;
     return (0);
   }