Add timestamp to log messages

1 files changed, 15 insertions, 0 deletions

diff --git a/common/log.c b/common/log.c
index 6f9fb07e..1da2ba2f 100644
--- a/common/log.c
+++ b/common/log.c
@@ -8,6 +8,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <signal.h>
+#include <time.h>
 #include <errno.h>
 #include <string.h>
 #include <stringop.h>
@@ -65,6 +66,20 @@ void sway_abort(const char *format, ...) {
 
 void _sway_log(const char *filename, int line, log_importance_t verbosity, const char* format, ...) {
         if (verbosity <= v) {
+                // prefix the time to the log message
+                static struct tm result;
+                static time_t t;
+                static struct tm *tm_info;
+                char buffer[26];
+
+                // get current time
+                t = time(NULL);
+                // convert time to local time (determined by the locale)
+                tm_info = localtime_r(&t, &result);
+                // generate time prefix
+                strftime(buffer, sizeof(buffer), "%x %X - ", tm_info);
+                fprintf(stderr, "%s", buffer);
+
                 unsigned int c = verbosity;
                 if (c > sizeof(verbosity_colors) / sizeof(char *) - 1) {
                         c = sizeof(verbosity_colors) / sizeof(char *) - 1;