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From 5ccf02d71c36bed22929893f3ad5374a333daf77 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Tue, 28 Jun 2016 16:12:47 -0400
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Subject: [PATCH] journalct: allow --boot=0 to DTRT with --file/--directory
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--boot=0 magically meant "this boot", but when used with --file/--directory it
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should simply refer to the last boot found in the specified journal. This way,
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--boot and --list-boots are consistent.
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Fixes #3603.
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(cherry picked from commit 592855c3189549fed93b1060b72299910c6ab1d0)
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Related: #1463678
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---
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src/journal/journalctl.c | 9 +++++++--
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1 file changed, 7 insertions(+), 2 deletions(-)
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diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
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index b9549602d9..077dc37f76 100644
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--- a/src/journal/journalctl.c
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+++ b/src/journal/journalctl.c
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@@ -1050,7 +1050,7 @@ static int get_boots(
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/* Adjust for the asymmetry that offset 0 is
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* the last (and current) boot, while 1 is considered the
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* (chronological) first boot in the journal. */
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- skip_once = query_ref_boot && sd_id128_is_null(query_ref_boot->id) && ref_boot_offset < 0;
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+ skip_once = query_ref_boot && sd_id128_is_null(query_ref_boot->id) && ref_boot_offset <= 0;
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/* Advance to the earliest/latest occurrence of our reference
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* boot ID (taking our lookup direction into account), so that
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@@ -1188,7 +1188,12 @@ static int add_boot(sd_journal *j) {
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if (!arg_boot)
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return 0;
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- if (arg_boot_offset == 0 && sd_id128_equal(arg_boot_id, SD_ID128_NULL))
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+ /* Take a shortcut and use the current boot_id, which we can do very quickly.
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+ * We can do this only when we logs are coming from the current machine,
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+ * so take the slow path if log location is specified. */
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+ if (arg_boot_offset == 0 && sd_id128_equal(arg_boot_id, SD_ID128_NULL) &&
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+ !arg_directory && !arg_file)
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+
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return add_match_this_boot(j, arg_machine);
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ref_boot_id.id = arg_boot_id;
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