v. 2023.09.02

multilog_readable-datetime patch for djb daemontools http://cr.yp.to/daemontools.html
by Roberto Puzzanghera https://notes.sagredo.eu

It replaces the timestamp in the log lines with a human readable datetime

@40000000649b607828223d14 tcpserver: status: 0/200/0
will be
2023-06-28 16:17:26.501272173 tcpserver: status: 0/200/0

This patch is compatible with jms' convert-multilog script, with a few modifications.
Just download and install it again.

Also the qlog archive program is compatible with this time format, provided that you
adjust your log/run files in this way

 -  	n5 s16777215 '-*' '+* qlog*' !/usr/local/bin/archive_qmail_qlog $LOGDIRQLOG
 +  	n5 s16777215 '-*' '+*qlog*' !/usr/local/bin/archive_qmail_qlog $LOGDIRQLOG

note the missing blank space before 'qlog'.

=======================================================================================

diff -ruN daemontools-0.76-original/src/multilog.c daemontools-0.76/src/multilog.c
--- daemontools-0.76-original/src/multilog.c	2023-06-28 16:21:31.541358932 +0200
+++ daemontools-0.76/src/multilog.c	2023-06-29 16:09:34.268560463 +0200
@@ -516,9 +516,9 @@
       }
       if (!linelen)
         if (flagtimestamp) {
-          timestamp(line);
-          line[25] = ' ';
-          linelen = 26;
+          readable_datetime(line);
+          line[29] = ' ';
+          linelen = 30;
         }
       if (ch == '\n')
         break;
diff -ruN daemontools-0.76-original/src/timestamp.c daemontools-0.76/src/timestamp.c
--- daemontools-0.76-original/src/timestamp.c	2001-07-12 18:49:49.000000000 +0200
+++ daemontools-0.76/src/timestamp.c	2023-06-29 16:13:02.858250706 +0200
@@ -1,7 +1,14 @@
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <sys/time.h>
 #include "taia.h"
 #include "timestamp.h"
 
 static char hex[16] = "0123456789abcdef";
+struct tm *tm_info;
+struct timespec tv;
+char nsec_buf[11];
 
 void timestamp(char s[TIMESTAMP])
 {
@@ -18,3 +25,12 @@
     s[i * 2 + 2] = hex[nowpack[i] & 15];
   }
 }
+
+void readable_datetime(char s[DT])
+{
+  clock_gettime(CLOCK_REALTIME, &tv);
+  tm_info = localtime(&tv.tv_sec);
+  strftime(s, DT, "%F %T", tm_info);
+  sprintf(nsec_buf, ".%09ld", tv.tv_nsec);
+  strcat(s, nsec_buf);
+}
diff -ruN daemontools-0.76-original/src/timestamp.h daemontools-0.76/src/timestamp.h
--- daemontools-0.76-original/src/timestamp.h	2001-07-12 18:49:49.000000000 +0200
+++ daemontools-0.76/src/timestamp.h	2023-06-29 16:12:23.027309169 +0200
@@ -2,7 +2,9 @@
 #define TIMESTAMP_H
 
 #define TIMESTAMP 25
+#define DT 29
 
 extern void timestamp(char *);
+extern void readable_datetime(char *);
 
 #endif