cat: fix splice() from empty input

* src/cat.c (splice_cat): Ensure we don't retry a read() after
splice() completes, as this is significant on a tty.

diff --git a/src/cat.c b/src/cat.c
index e920e4bee76346d29903209a33e8102c074d6f2a..f1e2c85aff81940be73c20bd89df4fa99fb8f63c 100644 (file)
--- a/src/cat.c
+++ b/src/cat.c
@@ -593,6 +593,8 @@ splice_cat (void)
          subsequent error is fatal.  If not, then fall back to read
          and write.  */
       in_ok = 0 <= bytes_read || ! some_copied;
+      if (bytes_read == 0)
+        some_copied = true;  /* Indicate splice complete.  */
       if (bytes_read <= 0)
         goto done;
       /* We need to drain the intermediate pipe to standard output.  */