From: Hilton Chain via Bug reports for GNU Guix <bug-guix@gnu.org>
To: 70165@debbugs.gnu.org
Cc: Vivien Kraus <vivien@planete-kraus.eu>,
Liliana Marie Prikler <liliana.prikler@gmail.com>
Subject: bug#70165: D-Bus system service breaks reconfiguration when /var/run/dbus is present + /run and /var/run are on separate file systems.
Date: Thu, 04 Apr 2024 00:36:06 +0800 [thread overview]
Message-ID: <87frw2mmix.wl-hako@ultrarare.space> (raw)
Hi,
I have /var/run and /run on separate file systems, recently I noticed system
reconfiguration stopped with "guix system: error: rename-file: Invalid
cross-device link":
--8<---------------cut here---------------start------------->8---
newfstatat(AT_FDCWD, "/run", {st_mode=S_IFDIR|0755, st_size=440, ...}, AT_SYMLINK_NOFOLLOW) = 0
newfstatat(AT_FDCWD, "/run/dbus", {st_mode=S_IFDIR|0700, st_size=40, ...}, AT_SYMLINK_NOFOLLOW) = 0
mkdir("/run", 0777) = -1 EEXIST (File exists)
mkdir("/run/dbus", 0777) = -1 EEXIST (File exists)
chown("/run/dbus", 988, 983) = 0
chmod("/run/dbus", 0755) = 0
symlink("/run/dbus", "/var/run/dbus") = -1 EEXIST (File exists)
readlink("/var/run/dbus", 0x1634730, 100) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "/var/run/dbus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 17
newfstatat(17, "", {st_mode=S_IFDIR|0755, st_size=80, ...}, AT_EMPTY_PATH) = 0
getdents64(17, 0x16dfe10 /* 4 entries */, 32768) = 112
rename("/var/run/dbus/system_bus_socket", "/run/dbus/system_bus_socket") = -1 EXDEV (Invalid cross-device link)
close(13) = 0
write(2, "\33[1m\33[0mguix system: error: rena"..., 67^[[1m^[[0mguix system: error: rename-file: Invalid cross-device link
) = 67
exit_group(1) = ?
+++ exited with 1 +++
--8<---------------cut here---------------end--------------->8---
It's because /var/run/dbus was used for dbus service before, and now migration
to /run/dbus is done with ‘rename-file’:
--8<---------------cut here---------------start------------->8---
(rename-file (string-append "/var/run/dbus/" next)
(string-append "/run/dbus/" next))
--8<---------------cut here---------------end--------------->8---
I think the logic can be improved for this case, but not sure how at the moment.
What do you think?
Thanks
next reply other threads:[~2024-04-03 16:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-03 16:36 Hilton Chain via Bug reports for GNU Guix [this message]
2024-04-04 18:52 ` bug#70165: D-Bus system service breaks reconfiguration when /var/run/dbus is present + /run and /var/run are on separate file systems Liliana Marie Prikler
2024-04-05 1:53 ` Hilton Chain via Bug reports for GNU Guix
2024-04-06 6:43 ` Liliana Marie Prikler
2024-05-23 9:10 ` Ludovic Courtès
2024-05-10 14:22 ` Collin J. Doering via Bug reports for GNU Guix
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