ante: Truncate the file before writing to it.

Previously the file size would not decrease even if data was deleted.

1 files changed, 1 insertions, 0 deletions

diff --git a/userland/ante/ante.c b/userland/ante/ante.c
index 003b03c..7fc1315 100644
--- a/userland/ante/ante.c
+++ b/userland/ante/ante.c
@@ -220,6 +220,7 @@ void draw_file(void) {
 
 void write_file(void) {
   assert(file_buffer);
+  assert(0 == ftruncate(file_fd, file_size));
   pwrite(file_fd, file_buffer, file_size, 0);
 }