bla

code/Makefile

@@ -24,6 +24,8 @@ no-op:		no-op.c Makefile
 get-signal:	get-signal.c Makefile
 	gcc -Wall $< -o $@
 
+fifo:		fifo-rx fifo-tx
+
 dtime.o:	dtime.c my-fifo.h Makefile
 	gcc -Wall -c $<
 

code/dtime.c

@@ -1,6 +1,6 @@
 #include <stddef.h>
 #include <sys/time.h>
-
+#include "my-fifo.h"
 double dtime(void)
 {
 struct timeval tv;

code/fifo-rx.c

@@ -13,9 +13,12 @@ int		fifo;
 Message		message;
 double		localTS;
 
-if (argc!=2)		exit(1);
-fifo = mkfifo(argv[1], 0400);
-if (fifo) {
+if (argc!=2) {
+	fprintf(stderr, "%s need a fifo name\n", argv[0]);
+	exit(1);
+	}
+fifo = mkfifo(argv[1], O_RDONLY|O_CREAT);
+if (-1==fifo) {
 	perror("mkfifo fail");
 	exit(2);
 	}

code/fifo-tx.c

@@ -1,6 +1,7 @@
 /***		named pipe --- transmiter	***/
 #include  <stdio.h>
 #include   <stdlib.h>
+#include   <string.h>
 #include  <unistd.h>
 #include  <fcntl.h>
 #include  "my-fifo.h"
@@ -15,6 +16,7 @@ if (-1==(fifo = open(argv[1], O_WRONLY))) {
 	perror("open fifo for wr");
 	exit(1);
 	}
+memset(&message, 0, sizeof(Message));
 message.pid = getpid();
 message.timestamp = dtime();
 write(fifo, &message, sizeof(Message));