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From a4f12d4849daed23651ab3c23b5ff830aa32b2a0 Mon Sep 17 00:00:00 2001
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From: Michal Sekletar <msekleta@redhat.com>
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Date: Wed, 3 Feb 2016 10:38:29 +0100
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Subject: [PATCH] man: clarify what happens when journalctl is called with
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devpath
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Cherry-picked from: 3cea8e06e45fc1757de8f74da29fb5fb181db4eb
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Related: #947636
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---
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man/journalctl.xml | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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diff --git a/man/journalctl.xml b/man/journalctl.xml
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index 2764f66ed4..0981fba729 100644
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--- a/man/journalctl.xml
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+++ b/man/journalctl.xml
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@@ -91,8 +91,14 @@
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paths may be specified. If a file path refers to an executable
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file, this is equivalent to an <literal>_EXE=</literal> match
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for the canonicalized binary path. Similarly, if a path refers
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- to a device node, this is equivalent to a
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- <literal>_KERNEL_DEVICE=</literal> match for the device.</para>
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+ to a device node then match is added for the kernel name of the
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+ device (<literal>_KERNEL_DEVICE=</literal>). Also, matches for the
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+ kernel names of all the parent devices are added automatically.
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+ Device node paths are not stable across reboots, therefore match
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+ for the current boot id (<literal>_BOOT_ID=</literal>) is
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+ always added as well. Note that only the log entries for
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+ the existing device nodes maybe queried by providing path to
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+ the device node.</para>
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<para>Additional constraints may be added using options
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<option>--boot</option>, <option>--unit=</option>, etc, to
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