Add display version

src/Makefile

@@ -5,6 +5,9 @@ OBJS=smartdns.o fast_ping.o dns_client.o dns_server.o dns.o util.o tlog.o dns_co
 CFLAGS +=-O2 -g -Wall -Wstrict-prototypes -fno-omit-frame-pointer -Wstrict-aliasing 
 CFLAGS +=-Iinclude
 CFLAGS += -DBASE_FILE_NAME=\"$(notdir $<)\"
+ifdef VER
+CFLAGS += -DSMARTDNS_VERION=\"$(VER)\"
+endif
 CXXFLAGS=-O2 -g -Wall -std=c++11 
 CXXFLAGS +=-Iinclude
 ifeq ($(STATIC), yes)

src/smartdns.c

@@ -59,7 +59,8 @@ static void _help(void)
 		"  -c [conf]     config file.\n"
 		"  -p [pid]      pid file path\n"
 		"  -S            ignore segment fault signal.\n"
-		"  -v            verbose screent.\n"
+		"  -x            verbose screen.\n"
+		"  -v            dispaly version.\n"
 		"  -h            show this help message.\n"
 
 		"Online help: http://pymumu.github.io/smartdns\n"
@@ -69,6 +70,21 @@ static void _help(void)
 	printf("%s", help);
 }
 
+static void _show_version(void) 
+{
+	char str_ver[256] = {0};
+#ifdef SMARTDNS_VERION
+	const char *ver = SMARTDNS_VERION;
+	snprintf(str_ver, sizeof(str_ver), "%s", ver);
+#else
+	struct tm tm;
+	get_compiled_time(&tm);
+	snprintf(str_ver, sizeof(str_ver), "1.%.4d%.2d%.2d-%.2d%.2d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
+			 tm.tm_min);
+#endif
+	printf("smartdns %s\n", str_ver);
+}
+
 static int _smartdns_load_from_resolv(void)
 {
 	FILE *fp = NULL;
@@ -362,7 +378,7 @@ int main(int argc, char *argv[])
 	safe_strncpy(config_file, SMARTDNS_CONF_FILE, MAX_LINE_LEN);
 	safe_strncpy(pid_file, SMARTDNS_PID_FILE, MAX_LINE_LEN);
 
-	while ((opt = getopt(argc, argv, "fhc:p:Sv")) != -1) {
+	while ((opt = getopt(argc, argv, "fhc:p:Svx")) != -1) {
 		switch (opt) {
 		case 'f':
 			is_forground = 1;
@@ -376,9 +392,13 @@ int main(int argc, char *argv[])
 		case 'S':
 			signal_ignore = 1;
 			break;
-		case 'v':
+		case 'x':
 			verbose_screen = 1;
 			break;
+		case 'v':
+			_show_version();
+			return 0;
+			break;
 		case 'h':
 			_help();
 			return 1;

src/util.c

@@ -839,3 +839,22 @@ static int parse_server_name_extension(const char *data, size_t data_len, char *
 
 	return -2;
 }
+
+void get_compiled_time(struct tm *tm) 
+{ 
+    char s_month[5];
+    int month, day, year;
+	int hour, min, sec;
+    static const char *month_names = "JanFebMarAprMayJunJulAugSepOctNovDec";
+
+    sscanf(__DATE__, "%s %d %d", s_month, &day, &year);
+    month = (strstr(month_names, s_month) - month_names) / 3;
+	sscanf(__TIME__, "%d:%d:%d", &hour, &min, &sec);
+    tm->tm_year = year - 1900;
+    tm->tm_mon = month;
+    tm->tm_mday = day;
+    tm->tm_isdst = -1;
+	tm->tm_hour = hour;
+	tm->tm_min = min;
+	tm->tm_sec = sec;
+}

src/util.h

@@ -4,6 +4,7 @@
 #define SMART_DNS_UTIL_H
 
 #include <netdb.h>
+#include <time.h>
 #include "stringutil.h"
 
 #define PORT_NOT_DEFINED -1
@@ -56,4 +57,6 @@ int create_pid_file(const char *pid_file);
  */
 int parse_tls_header(const char *data, size_t data_len, char *hostname, const char **hostname_ptr);
 
+void get_compiled_time(struct tm *tm);
+
 #endif