NetworkServer: Kill running DHCPServer before starting our own

We cannot run two DHCPServers at once, let's just kill the one that was
started previously.

1 files changed, 2 insertions, 0 deletions

diff --git a/Userland/Services/NetworkServer/main.cpp b/Userland/Services/NetworkServer/main.cpp
index a398b9794b..4bbf3fe232 100644
--- a/Userland/Services/NetworkServer/main.cpp
+++ b/Userland/Services/NetworkServer/main.cpp
@@ -22,6 +22,7 @@ ErrorOr<int> serenity_main(Main::Arguments)
     TRY(Core::System::unveil("/bin/DHCPClient", "x"));
     TRY(Core::System::unveil("/etc/Network.ini", "r"));
     TRY(Core::System::unveil("/bin/ifconfig", "x"));
+    TRY(Core::System::unveil("/bin/killall", "x"));
     TRY(Core::System::unveil("/bin/route", "x"));
     TRY(Core::System::unveil(nullptr, nullptr));
 
@@ -88,6 +89,7 @@ ErrorOr<int> serenity_main(Main::Arguments)
         for (auto& iface : interfaces_with_dhcp_enabled)
             args.append(const_cast<char*>(iface.characters()));
         args.append(nullptr);
+        MUST(Core::command("killall", { "DHCPClient" }, {}));
         auto dhcp_client_pid = TRY(Core::System::posix_spawnp("DHCPClient", nullptr, nullptr, args.data(), environ));
         TRY(Core::System::disown(dhcp_client_pid));
     }