dd: exit with 1 if last write was incomplete

$ busybox dd if=/dev/zero of=/dev/loop0 bs=100M count=8; echo $?
8+0 records in
7+1 records out
805220352 bytes (767.9MB) copied, 0.464010 seconds, 1.6GB/s
1  <=========== FIXED

function                                             old     new   delta
write_and_stats                                       96      97      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/coreutils/dd.c b/coreutils/dd.c
index d302f35d3..9d173cc13 100644
--- a/coreutils/dd.c
+++ b/coreutils/dd.c
@@ -195,14 +195,16 @@ static bool write_and_stats(const void *buf, size_t len, size_t obs,
         ssize_t n = full_write_or_warn(buf, len, filename);
         if (n < 0)
                 return 1;
-        if ((size_t)n == obs)
-                G.out_full++;
-        else if (n) /* > 0 */
-                G.out_part++;
 #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
         G.total_bytes += n;
 #endif
-        return 0;
+        if ((size_t)n == obs) {
+                G.out_full++;
+                return 0;
+        }
+        if (n) /* > 0 */
+                G.out_part++;
+        return 1;
 }
 
 #if ENABLE_LFS