From c025384103a9852f852d075337d1e2066253889f Mon Sep 17 00:00:00 2001
From: Stef Walter <stefw@redhat.com>
Date: Fri, 14 Aug 2015 16:38:41 +0200
Subject: [PATCH 2/4] journalctl: make sure 'journalctl -f -t unmatched' blocks

Previously the following command:

$ journalctl -f -t unmatchedtag12345

... would block when called with criteria that did not match any
journal lines. Once log lines appeared that matched the criteria
they were displayed.

Commit 02ab86c732576a71179ce12e97d44c289833236d broke this
behavior and the journal was not followed, but the command
exits with '-- No entries --' displayed.

This commit fixes the issue.

More information downstream:

https://bugzilla.redhat.com/show_bug.cgi?id=1253649
---
 src/journal/journalctl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 073cc77..5c058dd 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -2067,8 +2067,12 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
         if (r == 0) {
-                printf("-- No entries --\n");
-                goto finish;
+                if (arg_follow)
+                        need_seek = true;
+                else {
+                        printf("-- No entries --\n");
+                        goto finish;
+                }
         }
 
         if (!arg_follow)
-- 
2.5.0