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core/namespace: add comment to explain the non-obvious assumption on /run/systemd/journal/

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Follow-up for 119820f8abf587f96a11fb1f28ef854e84bc3122

Addresses https://github.com/systemd/systemd/pull/32487#discussion_r1743493196
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Mike Yuan 2024-09-04 18:16:51 +02:00
parent 95f9e85aaa
commit cc4f736ae3
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1 changed files with 2 additions and 0 deletions
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src/core/namespace.c
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@ -1148,6 +1148,8 @@ static int mount_private_dev(const MountEntry *m, const NamespaceParameters *p)
FOREACH_STRING(d, "/dev/mqueue", "/dev/hugepages")
(void) bind_mount_device_dir(temporary_mount, d);
/* We assume /run/systemd/journal/ is available if not changing root, which isn't entirely accurate
* but shouldn't matter, as either way the user would get ENOENT when accessing /dev/log */
if ((!p->root_image && !p->root_directory) || p->bind_journal_sockets) {
const char *devlog = strjoina(temporary_mount, "/dev/log");
if (symlink("/run/systemd/journal/dev-log", devlog) < 0)