be more carefull in checking for sucessful open

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@619 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_open.c b/src/rrd_open.c
index 2b0f303..11476de 100644 (file)
--- a/src/rrd_open.c
+++ b/src/rrd_open.c
@@ -107,7 +107,7 @@ rrd_open(const char *file_name, FILE **in_file, rrd_t *rrd, int rdwr)
 
     MYFREAD(rrd->stat_head, stat_head_t,  1)
     /* lets see if the first read worked */
-    if (ferror( *in_file )){
+    if (ferror( *in_file ) || feof(*in_file)) {
        rrd_set_error("reading the cookie off %s faild",file_name);
        fclose(*in_file);
        return(-1);