Add missing long options and --help output.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 qemu-img.c | 38 ++++++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 8 deletions(-)

diff --git a/qemu-img.c b/qemu-img.c
index 01894c097b..69fa9701e9 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -804,7 +804,9 @@ static int img_check(const img_cmd_t *ccmd, int argc, char **argv)
         int option_index = 0;
         static const struct option long_options[] = {
             {"help", no_argument, 0, 'h'},
+            {"quiet", no_argument, 0, 'q'},
             {"format", required_argument, 0, 'f'},
+            {"cache", required_argument, 0, 'T'},
             {"repair", required_argument, 0, 'r'},
             {"output", required_argument, 0, OPTION_OUTPUT},
             {"object", required_argument, 0, OPTION_OBJECT},
@@ -812,20 +814,38 @@ static int img_check(const img_cmd_t *ccmd, int argc, char **argv)
             {"force-share", no_argument, 0, 'U'},
             {0, 0, 0, 0}
         };
-        c = getopt_long(argc, argv, ":hf:r:T:qU",
+        c = getopt_long(argc, argv, "hf:r:T:qU",
                         long_options, &option_index);
         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,
+"[-f FMT | --image-opts] [-T CACHE_MODE] [-r] [-u]\n"
+"        [--output human|json] [--object OBJDEF] FILENAME\n"
+,
+"  -q, --quiet\n"
+"     quiet operations\n"
+"  -f, --format FMT\n"
+"     specifies format of the image explicitly\n"
+"  --image-opts\n"
+"     indicates that FILENAME is a complete image specification\n"
+"     instead of a file name (incompatible with --format)\n"
+"  -T, --cache CACHE_MODE\n"
+"     image cache mode (" BDRV_DEFAULT_CACHE ")\n"
+"  -U, --force-share\n"
+"     open image in shared mode for concurrent access\n"
+"  --output human|json\n"
+"     output format\n"
+"  -r, --repair leaks|all\n"
+"     repair particular aspect of the image\n"
+"     (image will be open in read-write mode, incompatible with --force-share)\n"
+"  --object OBJDEF\n"
+"     QEMU user-creatable object (eg encryption key)\n"
+"  FILENAME\n"
+"     the image file (or image specification) to operate on\n"
+);
             break;
         case 'f':
             fmt = optarg;
@@ -860,6 +880,8 @@ static int img_check(const img_cmd_t *ccmd, int argc, char **argv)
         case OPTION_IMAGE_OPTS:
             image_opts = true;
             break;
+        default:
+            tryhelp(argv[0]);
         }
     }
     if (optind != argc - 1) {
-- 
2.39.2