added rules to build GNUmakerules and GNUmakevars if they are missing

added new options:

 -s (seconds since the epoch)
 -r (relative to start of program)

ts/GNUmakefile

@@ -31,4 +31,10 @@ configure: $(CONFDIR)/start $(CONFDIR)/perl $(CONFDIR)/finish
 
 endif
 
+GNUmakevars: GNUmakevars.sh
+	sh ./$^ > $@
+GNUmakerules: GNUmakerules.sh
+	sh ./$^ > $@
+
+
 include GNUmakerules

ts/GNUmakerules.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "\$(BINDIR)/%: %"
+echo -e "\tcp \$^ \$@"

ts/GNUmakevars.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+prefix=${prefix:-/usr/local}
+echo "BINDIR=$prefix/bin"
+echo
+echo "all:"

ts/ts.c

@@ -9,7 +9,7 @@
 static char *cmnd;
 
 static void usage(void) {
-    fprintf(stderr, "Usage: %s [-u] [-o file]\n", cmnd);
+    fprintf(stderr, "Usage: %s [-u] [-s] [-r] [-o file]\n", cmnd);
     exit(1);
 }
 
@@ -17,14 +17,16 @@ static void usage(void) {
 int main(int argc, char **argv) {
     int c;
     int use_microseconds = 0;
+    int use_seconds = 0;
     int print_ts = 1;
     char lastfile[FILENAME_MAX] = "", file[FILENAME_MAX] = "";
     char *filepat = NULL;
     FILE *fp = NULL;
+    struct timeval start = { 0, 0 };
 
     cmnd = argv[0];
 
-    while ((c = getopt(argc, argv, "uo:")) != EOF) {
+    while ((c = getopt(argc, argv, "suro:")) != EOF) {
 	switch (c) {
 	    case 'u':
 		use_microseconds = 1;
@@ -32,6 +34,14 @@ int main(int argc, char **argv) {
 	    case 'o':
 		filepat = optarg;
 		break;
+	    case 's':
+		use_seconds = 1;
+		break;
+	    case 'r':
+		gettimeofday(&start, NULL);
+		use_seconds = 1;
+		use_microseconds = 1;
+		break;
 	    default:
 		usage();
 	}
@@ -64,9 +74,19 @@ int main(int argc, char **argv) {
 		}
 	    }
 
+	    if (use_seconds) {
+		tv.tv_usec -= start.tv_usec;
+		if (tv.tv_usec < 0) {
+		    tv.tv_usec += 1000000;
+		    tv.tv_sec -= 1;
+		}
+		tv.tv_sec -= start.tv_sec;
+		fprintf(fp, "%ld", (long)tv.tv_sec);
+	    } else {
 		strftime(s, sizeof(s), "%Y-%m-%dT%H:%M:%S",
 			 localtime(&tv.tv_sec));
 		fputs(s, fp);
+	    }
 	    if (use_microseconds) {
 		fprintf(fp, ".%06ld ", (long)tv.tv_usec);
 	    }