Fix: consumer should await for initial streams

[lttng-tools.git] / src / bin / lttng-sessiond / utils.c

diff --git a/src/bin/lttng-sessiond/utils.c b/src/bin/lttng-sessiond/utils.c
index ce2e97561f0170c3dbdb072370e79b1e5ec502ae..5ea337450ecf63e8fc1f19b6e7e336804e869f68 100644 (file)
--- a/src/bin/lttng-sessiond/utils.c
+++ b/src/bin/lttng-sessiond/utils.c
@@ -17,11 +17,7 @@
  */
 
 #define _GNU_SOURCE
-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <unistd.h>
 
 #include <common/error.h>
@@ -35,7 +31,14 @@ int notify_thread_pipe(int wpipe)
 {
        int ret;
 
-       ret = write(wpipe, "!", 1);
+       /* Ignore if the pipe is invalid. */
+       if (wpipe < 0) {
+               return 0;
+       }
+
+       do {
+               ret = write(wpipe, "!", 1);
+       } while (ret < 0 && errno == EINTR);
        if (ret < 0) {
                PERROR("write poll pipe");
        }