rk27utils: improve command line parsing, allow arbitrary USB ids in rkusbtool

Change-Id: I884fe29c10dede7823721c2cac5dc627d6ab25c6
Reviewed-on: http://gerrit.rockbox.org/731
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/utils/rk27utils/rk27load/main.c b/utils/rk27utils/rk27load/main.c
index d183ae2df1..e34d7667e3 100644
--- a/utils/rk27utils/rk27load/main.c
+++ b/utils/rk27utils/rk27load/main.c
@@ -91,6 +91,12 @@ int main(int argc, char **argv)
         }
     }
 
+    if(filenames[0] == NULL || filenames[1] == NULL || filenames[2] == NULL)
+    {
+        usage(argv[0]);
+        return -5;
+    }
+
  
     fprintf(stderr,"rk27load " VERSION "\n");
     fprintf(stderr,"(C) Marcin Bukat 2011\n");