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From efd523764efcd39340fb62875716c8c8b79f0de9 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 9 Feb 2018 22:38:46 +0100
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Subject: [PATCH] sd-journal: make sure it's safe to call sd_journal_process()
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before the first sd_journal_wait()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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In that case we have no inotify fd yet, and there's nothing to process
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hence. Let's make the call a NOP.
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(Previously, without this change we'd end up trying to read off inotify
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fd -1, which is quite a problem... 😢)
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(cherry picked from commit 10c4d6405f74258ea4fac5db4888c1bf49ad5399)
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Related: #1540538
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---
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src/journal/sd-journal.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
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index 9186f5188..e1cde6e1c 100644
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--- a/src/journal/sd-journal.c
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+++ b/src/journal/sd-journal.c
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@@ -2329,6 +2329,9 @@ _public_ int sd_journal_process(sd_journal *j) {
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assert_return(j, -EINVAL);
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assert_return(!journal_pid_changed(j), -ECHILD);
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+ if (j->inotify_fd < 0) /* We have no inotify fd yet? Then there's noting to process. */
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+ return 0;
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+
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j->last_process_usec = now(CLOCK_MONOTONIC);
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j->last_invalidate_counter = j->current_invalidate_counter;
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