From: Michael Tremer <michael.tremer@ipfire.org>
Date: Sun, 10 May 2026 11:34:57 +0000 (+0000)
Subject: main: Add a very basic command line parser
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9229a95bf0be18981de22123727f21d703f82492;p=zone-sync.git

main: Add a very basic command line parser

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/configure.ac b/configure.ac
index 653dc6b..1e55ca6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -122,7 +122,10 @@ AC_TYPE_SSIZE_T
 AC_TYPE_UID_T
 AC_TYPE_UINT64_T
 
-AC_CHECK_HEADERS([])
+AC_CHECK_HEADERS([ \
+	argp.h \
+	syslog.h \
+])
 
 AC_CHECK_FUNCS([])
 
diff --git a/main.c b/main.c
index f3c7629..c8c900f 100644
--- a/main.c
+++ b/main.c
@@ -18,6 +18,66 @@
 #                                                                             #
 #############################################################################*/
 
+#include <argp.h>
+#include <syslog.h>
+
+typedef struct ctx {
+	int log_level;
+} ctx_t;
+
+const char* argp_program_version = PACKAGE_VERSION;
+
+static const char* args_doc = "TODO";
+
+enum {
+	OPT_DEBUG = 1,
+};
+
+static struct argp_option options[] = {
+	{ "debug", OPT_DEBUG, NULL, 0, "Run in debug mode", 0 },
+	{ NULL },
+};
+
+static error_t parse(int key, char* arg, struct argp_state* state) {
+	ctx_t* ctx = state->input;
+
+	switch (key) {
+		case OPT_DEBUG:
+			ctx->log_level = LOG_DEBUG;
+			break;
+
+		// Ignore these
+		case ARGP_KEY_END:
+		case ARGP_KEY_ERROR:
+		case ARGP_KEY_INIT:
+		case ARGP_KEY_FINI:
+			break;
+
+		default:
+			return ARGP_ERR_UNKNOWN;
+	}
+
+	return 0;
+}
+
 int main(int argc, char* argv[]) {
+	int r;
+
+	// Create the context
+	ctx_t ctx = {};
+
+	// Setup the command line parser
+	struct argp parser = {
+		.options   = options,
+		.parser    = parse,
+		.args_doc  = args_doc,
+	};
+	int arg_index = 0;
+
+	// Parse the command line
+	r = argp_parse(&parser, argc, argv, ARGP_IN_ORDER, &arg_index, &ctx);
+	if (r)
+		return r;
+
 	return 0;
 }