Add --help cmd option

resetius · Nov 29, 2024 · d811512 · d811512
1 parent 6c53f83
commit d811512
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Showing 3 changed files with 21 additions and 0 deletions.
diff --git a/examples/echoclient.cpp b/examples/echoclient.cpp
@@ -50,6 +50,11 @@ void run(bool debug, TAddress address)
     }
 }
 
+void usage(const char* name) {
+    std::cerr << name << " [--port 80] [--addr 127.0.0.1] [--method select|poll|epoll|kqueue] [--debug] [--help]" << std::endl; 
+    std::exit(1);
+}
+
 int main(int argc, char** argv) {
     TInitializer init;
     std::string addr = "127.0.0.1";
@@ -65,6 +70,8 @@ int main(int argc, char** argv) {
             method = argv[++i];
         } else if (!strcmp(argv[i], "--debug")) {
             debug = true;
+        } else if (!strcmp(argv[i], "--help")) {
+            usage(argv[0]);
         }
     }
     if (port == 0) { port = 8888; }

diff --git a/examples/echoserver.cpp b/examples/echoserver.cpp
@@ -62,6 +62,11 @@ void run(bool debug, TAddress address, int buffer_size)
     loop.Loop();
 }
 
+void usage(const char* name) {
+    std::cerr << name << " [--port 80] [--method select|poll|epoll|kqueue] [--debug] [--buffer-size 100000] [--help]" << std::endl;
+    std::exit(1);
+}
+
 int main(int argc, char** argv) {
     NNet::TInitializer init;
     int port = 0;
@@ -77,6 +82,8 @@ int main(int argc, char** argv) {
             debug = true;
         } else if (!strcmp(argv[i], "--buffer-size") && i < argc-1) {
             buffer_size = atoi(argv[++i]);
+        } else if (!strcmp(argv[i], "--help")) {
+            usage(argv[0]);
         }
     }
     if (port == 0) { port = 8888; }

diff --git a/examples/resolver.cpp b/examples/resolver.cpp
@@ -48,6 +48,11 @@ void run(EDNSType type) {
     }
 }
 
+void usage(const char* name) {
+    std::cerr << name << " [--method select|poll|epoll|kqueue] [--ipv6] [--help] < addr_file.txt" << std::endl;
+    std::exit(1);
+}
+
 int main(int argc, char** argv) {
     std::string method = "poll";
     EDNSType type = EDNSType::A;
@@ -56,6 +61,8 @@ int main(int argc, char** argv) {
             method = argv[++i];
         } else if (!strcmp(argv[i], "--ipv6")) {
             type = EDNSType::AAAA;
+        } else if (!strcmp(argv[i], "--help")) {
+            usage(argv[i]);
         }
     }