resolveip: fix endless getopt() loop when compiled for arm (#12290)

[openwrt.git] / package / network / utils / resolveip / src / resolveip.c

diff --git a/package/network/utils/resolveip/src/resolveip.c b/package/network/utils/resolveip/src/resolveip.c
index 310f35f..43c5ae7 100644 (file)
--- a/package/network/utils/resolveip/src/resolveip.c
+++ b/package/network/utils/resolveip/src/resolveip.c
@@ -35,7 +35,7 @@ static void show_usage(void)
 int main(int argc, char **argv)
 {
        int timeout = 3;
-       char opt;
+       int opt;
        char ipaddr[INET6_ADDRSTRLEN];
        void *addr;
        struct addrinfo *res, *rp;
@@ -49,7 +49,7 @@ int main(int argc, char **argv)
 
        while ((opt = getopt(argc, argv, "46t:h")) > -1)
        {
-               switch (opt)
+               switch ((char)opt)
                {
                        case '4':
                                hints.ai_family = AF_INET;