Add timestamp when logging to stdout

ttynvt.c

@@ -24,6 +24,7 @@
 #include <sys/ioctl.h>
 #include <sys/poll.h>
 #include <sys/socket.h>
+#include <sys/time.h>
 #include <sys/types.h>
 
 #include "telnet.h"
@@ -83,18 +84,40 @@ typedef struct {
 #include <sys/syscall.h>
 #define gettid() (pid_t)syscall(__NR_gettid)
 
+static const char *_hms_txt(char *buf, unsigned int len)
+{
+    struct timeval  tv;
+    unsigned int    sod, hh, mm, ss;
+
+    gettimeofday(&tv, NULL);
+
+    sod = tv.tv_sec % (24 * 3600);
+    hh = sod / 3600;
+    mm = (sod - hh * 3600) / 60;
+    ss = sod - hh * 3600 - mm * 60;
+    snprintf(buf, len, "%02d:%02d:%02d.%06d",
+             hh, mm, ss, (unsigned int)tv.tv_usec);
+
+    return buf;
+}
+
 _PRF2_ static void _log(int prio, const char *fmt, ...)
 {
     va_list         arg;
-    char            buf[256];
+    char            buf[256], buft[64];
 
     va_start(arg, fmt);
     vsnprintf(buf, sizeof(buf), fmt, arg);
 
     if (ttynvt_param.logstd)
-        printf("[%d] %d: %s", gettid(), prio, buf);
+    {
+        printf("%s: [%d] %d: %s",
+               _hms_txt(buft, sizeof(buft)), gettid(), prio, buf);
+    }
     else
+    {
         syslog(prio, "[%d] %s", gettid(), buf);
+    }
 
     va_end(arg);
 }