systemd/0755-sd-journal-when-SD_JOURNAL_CURRENT_USER-is-set-and-c.patch

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From 8dfa6d7536994c1a75b5d8a2af009efa9135b395 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 7 Jun 2023 15:19:25 +0200
Subject: [PATCH] sd-journal: when SD_JOURNAL_CURRENT_USER is set, and called
from system UID, imply SD_JOURNAL_SYSTEM
Fixes: #26742 #23679
(cherry picked from commit 97c621b72d8c5b5eb4bf7f177cd885bfc01518c9)
Resolves: RHEL-31070
---
src/libsystemd/sd-journal/sd-journal.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/src/libsystemd/sd-journal/sd-journal.c b/src/libsystemd/sd-journal/sd-journal.c
index 9ab31fbbc8..723beec0e8 100644
--- a/src/libsystemd/sd-journal/sd-journal.c
+++ b/src/libsystemd/sd-journal/sd-journal.c
@@ -41,6 +41,7 @@
#include "string-util.h"
#include "strv.h"
#include "syslog-util.h"
+#include "uid-alloc-range.h"
#define JOURNAL_FILES_MAX 7168
@@ -1217,25 +1218,32 @@ static bool file_has_type_prefix(const char *prefix, const char *filename) {
static bool file_type_wanted(int flags, const char *filename) {
assert(filename);
- if (!endswith(filename, ".journal") && !endswith(filename, ".journal~"))
+ if (!ENDSWITH_SET(filename, ".journal", ".journal~"))
return false;
/* no flags set → every type is OK */
if (!(flags & (SD_JOURNAL_SYSTEM | SD_JOURNAL_CURRENT_USER)))
return true;
- if (flags & SD_JOURNAL_SYSTEM && file_has_type_prefix("system", filename))
- return true;
-
- if (flags & SD_JOURNAL_CURRENT_USER) {
+ if (FLAGS_SET(flags, SD_JOURNAL_CURRENT_USER)) {
char prefix[5 + DECIMAL_STR_MAX(uid_t) + 1];
- xsprintf(prefix, "user-"UID_FMT, getuid());
+ xsprintf(prefix, "user-" UID_FMT, getuid());
if (file_has_type_prefix(prefix, filename))
return true;
+
+ /* If SD_JOURNAL_CURRENT_USER is specified and we are invoked under a system UID, then
+ * automatically enable SD_JOURNAL_SYSTEM too, because journald will actually put system user
+ * data into the system journal. */
+
+ if (uid_for_system_journal(getuid()))
+ flags |= SD_JOURNAL_SYSTEM;
}
+ if (FLAGS_SET(flags, SD_JOURNAL_SYSTEM) && file_has_type_prefix("system", filename))
+ return true;
+
return false;
}