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From b5915d4a5870668442d3ef08a3b1f6b0028ea97f Mon Sep 17 00:00:00 2001
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From: Uoti Urpala <uoti.urpala@pp1.inet.fi>
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Date: Thu, 20 Feb 2014 03:00:09 +0200
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Subject: [PATCH] logs-show: fix corrupt output with empty messages
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If a message had zero length, journalctl would print no newline, and
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two output lines would be concatenated. Fix. The problem was
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introduced in commit 31f7bf199452 ("logs-show: print multiline
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messages"). Affected short and verbose output modes.
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Before fix:
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Feb 09 21:16:17 glyph dhclient[1323]: Feb 09 21:16:17 glyph NetworkManager[788]: <info> (enp4s2): DHCPv4 state changed nbi -> preinit
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after:
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Feb 09 21:16:17 glyph dhclient[1323]:
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Feb 09 21:16:17 glyph NetworkManager[788]: <info> (enp4s2): DHCPv4 state changed nbi -> preinit
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(cherry-picked from 47d80904a1f72d559962cc5ad32fffd46672a34a)
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Resolves: #1147524
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---
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 src/shared/logs-show.c | 5 +++++
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 1 file changed, 5 insertions(+)
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diff --git a/src/shared/logs-show.c b/src/shared/logs-show.c
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index 7bb19b4..91eefb3 100644
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--- a/src/shared/logs-show.c
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+++ b/src/shared/logs-show.c
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@@ -121,6 +121,11 @@ static bool print_multiline(FILE *f, unsigned prefix, unsigned n_columns, Output
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                 }
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         }
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+        /* A special case: make sure that we print a newline when
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+           the message is empty. */
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+        if (message_len == 0)
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+                fputs("\n", f);
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+
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         for (pos = message;
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              pos < message + message_len;
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              pos = end + 1, line++) {