From de25ce120a270c76f7bd6d25a020cc64e88141b6 Mon Sep 17 00:00:00 2001
From: Neveda <63655535+Neved4@users.noreply.github.com>
Date: Wed, 10 Jul 2024 20:26:36 +0200
Subject: [PATCH] Update `usage()` function

---
 twc.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/twc.c b/twc.c
index dff6cb1..b0fd2dd 100644
--- a/twc.c
+++ b/twc.c
@@ -19,8 +19,19 @@ const char *time_fmts[NTIMEFMT] = {
 const char *file = "/twc/tz.conf";
 
 static void usage(const char *s) {
-	fprintf(stderr, "usage: %s [-h] [-s FORMAT] [-f FILE | -t TIMEZONE]\n", s);
-	exit(EXIT_FAILURE);
+    fprintf(stderr,
+        "usage: %s [-h] [-f path] [-s format] [-t timezone] ...\n\n"
+        "Options:\n"
+        "  -f path\n"
+        "        Read config from path (default \"$HOME/.config/twc/tz.conf\")\n"
+        "  -h    Print in human-readable format\n"
+        "  -s format\n"
+        "        Set desired time format (e.g. \"%%Y-%%m-%%d\")\n"
+        "  -t timezone\n"
+        "        Set a specific timezone (e.g. \"Asia/Tokyo\")\n",
+	s);
+
+    exit(EXIT_FAILURE);
 }
 
 static void errmsg(const char *msg) {