Improve usage helptext and add -h,--help arg

1 files changed, 13 insertions, 2 deletions

diff --git a/src/main.c b/src/main.c
index 3a9245d..9d6415a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -22,14 +22,25 @@
 #include "runconfig.h"
 
 void usage() {
-  fputs("Usage:\n  react-tcp-down <host_ip> <port> <command>\n\n", stderr);
+  fputs(
+    "Usage:\n"
+    "  react-tcp-down --ip <host_ip> --port <port> --cmd <command>\n\n"
+    "Arguments:\n"
+    "  -i,--ip    IP Address to check for port availability\n"
+    "  -p,--port  Port to check\n"
+    "  -c,--cmd   Command to run if port is down\n"
+    "  -h,--help  Print this help text\n"
+  , stderr);
 }
 
 int parse_args(struct runconfig* cfg, int argc, char* argv[]) {
   int i = 0;
   int status = 0;
   while(i < argc) {
-    if(strcmp(argv[i], "--ip") == 0 || strcmp(argv[i], "-i") == 0) {
+    if(strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "-h") == 0) {
+      usage();
+      return 1;
+    } else if(strcmp(argv[i], "--ip") == 0 || strcmp(argv[i], "-i") == 0) {
       i++;
       strcpy(cfg->ip, argv[i]);