[PATCH] cksum: --quiet option to output only the checksum when reading tty stdin

[Piotr H. Dabrowski]

* src/digest.c: --quiet option when reading tty stdin
---
 src/digest.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/src/digest.c b/src/digest.c
index 1a4cfd1fb..6501f5e9d 100644
--- a/src/digest.c
+++ b/src/digest.c
@@ -195,7 +195,8 @@ static bool warn = false;
 /* With --check, ignore missing files.  */
 static bool ignore_missing = false;

-/* With --check, suppress the "OK" printed for each verified file.  */
+/* With --check, suppress the "OK" printed for each verified file.
+   When reading tty stdin output only the checksum.  */
 static bool quiet = false;

 /* With --check, exit with a non-zero return code if any line is
@@ -475,6 +476,9 @@ Print or check %s (%d-bit) checksums.\n\
                           the blake2 algorithm and must be a multiple of
8\n\
 "), stdout);
 # endif
+        fputs (_("\
+      --quiet           output only the checksum when reading tty stdin\n\
+"), stdout);
 # if HASH_ALGO_CKSUM
         fputs (_("\
       --raw             emit a raw binary digest, not hexadecimal\
@@ -1085,7 +1089,7 @@ output_file (char const *file, int binary_file, void
const *digest,
         printf ("%02x", bin_buffer[i]);
     }

-  if (!tagged)
+  if (!tagged && !quiet)
     {
       putchar (' ');
       putchar (binary_file ? '*' : ' ');
@@ -1582,13 +1586,6 @@ main (int argc, char **argv)
       usage (EXIT_FAILURE);
     }

-  if (quiet && !do_check)
-    {
-      error (0, 0,
-       _("the --quiet option is meaningful only when verifying
checksums"));
-      usage (EXIT_FAILURE);
-    }
-
   if (strict & !do_check)
    {
      error (0, 0,
-- 
2.40.1