On Sat, Feb 9, 2019 at 2:00 PM <randall.s.becker@xxxxxxxxxx> wrote: > This change removes the dependency on /dev/zero with generate_zero_bytes > appending NUL values to blocks generating wrong signatures for test cases. This commit message says what the patch does but not _why_. At minimum, it should explain that /dev/zero is not available on all platforms, therefore, not portable, and (perhaps) cite NonStop as an example. > Signed-off-by: Randall S. Becker <rsbecker@xxxxxxxxxxxxx> > --- > diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh > @@ -383,7 +383,7 @@ corrupt_graph_and_verify() { > - dd if=/dev/zero of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" count=$(($orig_size - $zero_pos)) && > + generate_zero_bytes $(($orig_size - $zero_pos)) >> "$objdir/info/commit-graph" &&