Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 qemu-img.c | 45 +++++++++++++++++++++++++++++++++++++--------
 1 file changed, 37 insertions(+), 8 deletions(-)

diff --git a/qemu-img.c b/qemu-img.c
index 1271217272..fd61b25ea7 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1487,25 +1487,52 @@ static int img_compare(const img_cmd_t *ccmd, int argc, char **argv)
     for (;;) {
         static const struct option long_options[] = {
             {"help", no_argument, 0, 'h'},
+            {"quiet", no_argument, 0, 'q'},
             {"object", required_argument, 0, OPTION_OBJECT},
+            {"cache", required_argument, 0, 'T'},
             {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
+            {"a-format", required_argument, 0, 'f'},
+            {"left-format", required_argument, 0, 'f'},
+            {"b-format", required_argument, 0, 'F'},
+            {"right-format", required_argument, 0, 'F'},
             {"force-share", no_argument, 0, 'U'},
+            {"strict", no_argument, 0, 's'},
+            {"progress", no_argument, 0, 'p'},
             {0, 0, 0, 0}
         };
-        c = getopt_long(argc, argv, ":hf:F:T:pqsU",
+        c = getopt_long(argc, argv, "hf:F:T:pqsU",
                         long_options, NULL);
         if (c == -1) {
             break;
         }
         switch (c) {
-        case ':':
-            missing_argument(argv[optind - 1]);
-            break;
-        case '?':
-            unrecognized_option(argv[optind - 1]);
-            break;
         case 'h':
-            help();
+            cmd_help(ccmd,
+"[--image-opts | [-f FMT] [-F FMT]] [-s]\n"
+"        [-T CACHE] [-U] [--object OBJDEF] FILENAME1 FILENAME2\n"
+,
+"  -q, --quiet\n"
+"     quiet operation\n"
+"  -p, --progress\n"
+"     show operation progress\n"
+"  -f, --a-format FMT\n"
+"     specify FILENAME1 image format explicitly\n"
+"  -F, --b-format FMT\n"
+"     specify FILENAME2 image format explicitly\n"
+"  --image-opts\n"
+"     indicates that FILENAMEs are complete image specifications\n"
+"     instead of file names (incompatible with --a-format and --b-format)\n"
+"  -s, --strict\n"
+"     strict mode, also check if sizes are equal\n"
+"  -T, --cache CACHE_MODE\n"
+"     images caching mode (" BDRV_DEFAULT_CACHE ")\n"
+"  -U, --force-share\n"
+"     open images in shared mode for concurrent access\n"
+"  --object OBJDEF\n"
+"     QEMU user-creatable object (eg encryption key)\n"
+"  FILENAME1, FILENAME2\n"
+"     image files (or specifications) to compare\n"
+);
             break;
         case 'f':
             fmt1 = optarg;
@@ -1546,6 +1573,8 @@ static int img_compare(const img_cmd_t *ccmd, int argc, char **argv)
         case OPTION_IMAGE_OPTS:
             image_opts = true;
             break;
+        default:
+            tryhelp(argv[0]);
         }
     }
 
-- 
2.39.2