[monitoring-plugins] check_smtp: implement output format cli parameter

[Lorenz Kästle]

 Module: monitoring-plugins
 Branch: master
 Commit: 62035adf6c8199eba54755f23e8affe97e645300
 Author: Lorenz Kästle <12514511+RincewindsHat at users.noreply.github.com>
   Date: Sun Nov  9 11:32:43 2025 +0100
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=62035adf

check_smtp: implement output format cli parameter

---

 plugins/check_smtp.c          | 22 +++++++++++++++++++++-
 plugins/check_smtp.d/config.h |  6 ++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index f2c7f05c..cb92421c 100644
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
@@ -115,6 +115,10 @@ int main(int argc, char **argv) {
 
 	const check_smtp_config config = tmp_config.config;
 
+	if (config.output_format_is_set) {
+		mp_set_format(config.output_format);
+	}
+
 	/* If localhostname not set on command line, use gethostname to set */
 	char *localhostname = config.localhostname;
 	if (!localhostname) {
@@ -578,7 +582,8 @@ int main(int argc, char **argv) {
 /* process command-line arguments */
 check_smtp_config_wrapper process_arguments(int argc, char **argv) {
 	enum {
-		SNI_OPTION = CHAR_MAX + 1
+		SNI_OPTION = CHAR_MAX + 1,
+		output_format_index,
 	};
 
 	int option = 0;
@@ -608,6 +613,7 @@ check_smtp_config_wrapper process_arguments(int argc, char **argv) {
 									   {"certificate", required_argument, 0, 'D'},
 									   {"ignore-quit-failure", no_argument, 0, 'q'},
 									   {"proxy", no_argument, 0, 'r'},
+									   {"output-format", required_argument, 0, output_format_index},
 									   {0, 0, 0, 0}};
 
 	check_smtp_config_wrapper result = {
@@ -809,6 +815,18 @@ check_smtp_config_wrapper process_arguments(int argc, char **argv) {
 			exit(STATE_UNKNOWN);
 		case '?': /* help */
 			usage5();
+		case output_format_index: {
+			parsed_output_format parser = mp_parse_output_format(optarg);
+			if (!parser.parsing_success) {
+				// TODO List all available formats here, maybe add anothoer usage function
+				printf("Invalid output format: %s\n", optarg);
+				exit(STATE_UNKNOWN);
+			}
+
+			result.config.output_format_is_set = true;
+			result.config.output_format = parser.output_format;
+			break;
+		}
 		}
 	}
 
@@ -1015,6 +1033,8 @@ void print_help(void) {
 
 	printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 
+	printf(UT_OUTPUT_FORMAT);
+
 	printf(UT_VERBOSE);
 
 	printf("\n");
diff --git a/plugins/check_smtp.d/config.h b/plugins/check_smtp.d/config.h
index bc433093..11d7fe56 100644
--- a/plugins/check_smtp.d/config.h
+++ b/plugins/check_smtp.d/config.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "../../config.h"
+#include "output.h"
 #include "thresholds.h"
 #include <stddef.h>
 #include <string.h>
@@ -46,6 +47,9 @@ typedef struct {
 	bool use_starttls;
 	bool use_sni;
 #endif
+
+	bool output_format_is_set;
+	mp_output_format output_format;
 } check_smtp_config;
 
 check_smtp_config check_smtp_config_init() {
@@ -83,6 +87,8 @@ check_smtp_config check_smtp_config_init() {
 		.use_starttls = false,
 		.use_sni = false,
 #endif
+
+		.output_format_is_set = false,
 	};
 	return tmp;
 }