qemu-nbd: use no_argument/required_argument constants

When declaring the 'struct option' array, use the standard
constants no_argument/required_argument, instead of magic
values 0 and 1.
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

qemu-nbd.c

@@ -463,31 +463,32 @@ int main(int argc, char **argv)
     const char *sn_id_or_name = NULL;
     const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:";
     struct option lopt[] = {
-        { "help", 0, NULL, 'h' },
-        { "version", 0, NULL, 'V' },
-        { "bind", 1, NULL, 'b' },
-        { "port", 1, NULL, 'p' },
-        { "socket", 1, NULL, 'k' },
-        { "offset", 1, NULL, 'o' },
-        { "read-only", 0, NULL, 'r' },
-        { "partition", 1, NULL, 'P' },
-        { "connect", 1, NULL, 'c' },
-        { "disconnect", 0, NULL, 'd' },
-        { "snapshot", 0, NULL, 's' },
-        { "load-snapshot", 1, NULL, 'l' },
-        { "nocache", 0, NULL, 'n' },
-        { "cache", 1, NULL, QEMU_NBD_OPT_CACHE },
-        { "aio", 1, NULL, QEMU_NBD_OPT_AIO },
-        { "discard", 1, NULL, QEMU_NBD_OPT_DISCARD },
-        { "detect-zeroes", 1, NULL, QEMU_NBD_OPT_DETECT_ZEROES },
-        { "shared", 1, NULL, 'e' },
-        { "format", 1, NULL, 'f' },
-        { "persistent", 0, NULL, 't' },
-        { "verbose", 0, NULL, 'v' },
-        { "object", 1, NULL, QEMU_NBD_OPT_OBJECT },
-        { "export-name", 1, NULL, 'x' },
-        { "tls-creds", 1, NULL, QEMU_NBD_OPT_TLSCREDS },
-        { "image-opts", 0, NULL, QEMU_NBD_OPT_IMAGE_OPTS },
+        { "help", no_argument, NULL, 'h' },
+        { "version", no_argument, NULL, 'V' },
+        { "bind", required_argument, NULL, 'b' },
+        { "port", required_argument, NULL, 'p' },
+        { "socket", required_argument, NULL, 'k' },
+        { "offset", required_argument, NULL, 'o' },
+        { "read-only", no_argument, NULL, 'r' },
+        { "partition", required_argument, NULL, 'P' },
+        { "connect", required_argument, NULL, 'c' },
+        { "disconnect", no_argument, NULL, 'd' },
+        { "snapshot", no_argument, NULL, 's' },
+        { "load-snapshot", required_argument, NULL, 'l' },
+        { "nocache", no_argument, NULL, 'n' },
+        { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE },
+        { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO },
+        { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD },
+        { "detect-zeroes", required_argument, NULL,
+          QEMU_NBD_OPT_DETECT_ZEROES },
+        { "shared", required_argument, NULL, 'e' },
+        { "format", required_argument, NULL, 'f' },
+        { "persistent", no_argument, NULL, 't' },
+        { "verbose", no_argument, NULL, 'v' },
+        { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT },
+        { "export-name", required_argument, NULL, 'x' },
+        { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS },
+        { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS },
         { NULL, 0, NULL, 0 }
     };
     int ch;