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"-c", which is short for "--no-canonicalize", tells /bin/umount
that the path name is canonical (no .. or symlinks etc).
systemd always uses a canonical name, so this flag is appropriate
for systemd to use.
Knowing that the path is canonical allows umount to avoid
some calls to lstat() on the path.
From v2.30 "-c" goes further and causes umount to avoid all
attempts to 'lstat()' (or similar) the path. This is important
when automatically unmounting a filesystem, as lstat() can
hang indefinitely in some cases such as when an NFS server
is not accessible.
"-c" has been supported since util-linux 2.17 which is before the
earliest version supported by systemd.
So "-c" is safe to use now, and once util-linux v2.30 is in use,
it will allow mounts from non-responsive NFS servers to be
unmounted.
This prevents udev from double-freeing and crashing.
See https://github.com/systemd/systemd/issues/6040#issuecomment-306589836
==351== Invalid free() / delete / delete[] / realloc()
==351== at 0x4C2C14B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==351== by 0x13CBE8: hashmap_clear_free_free (hashmap.c:900)
==351== by 0x13CBE8: hashmap_free_free_free (hashmap.c:852)
==351== by 0x147F4F: sd_device_unref (sd-device.c:88)
==351== by 0x130CCC: udev_device_unref (libudev-device.c:552)
==351== by 0x130CD5: udev_device_unref (libudev-device.c:553)
==351== by 0x11FBBB: worker_spawn (udevd.c:488)
==351== by 0x1216E5: event_run (udevd.c:584)
==351== by 0x1216E5: event_queue_start (udevd.c:823)
==351== by 0x122213: on_uevent (udevd.c:927)
==351== by 0x141F2F: source_dispatch (sd-event.c:2272)
==351== by 0x142D52: sd_event_dispatch (sd-event.c:2631)
==351== by 0x142D52: sd_event_run (sd-event.c:2690)
==351== by 0x142D52: sd_event_loop (sd-event.c:2710)
==351== by 0x1159CB: run (udevd.c:1643)
==351== by 0x1159CB: main (udevd.c:1772)
==351== Address 0x81745b0 is 0 bytes inside a block of size 1 free'd
==351== at 0x4C2C14B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==351== by 0x1447F0: freep (alloc-util.h:57)
==351== by 0x1447F0: sd_device_set_sysattr_value (sd-device.c:1859)
==351== by 0x132081: udev_device_set_sysattr_value (libudev-device.c:849)
==351== by 0x12E777: set_trackpoint_sensitivity (udev-builtin-keyboard.c:180)
==351== by 0x12E777: builtin_keyboard.lto_priv.170 (udev-builtin-keyboard.c:263)
==351== by 0x14D03F: udev_builtin_run.constprop.75 (udev-builtin.c:133)
==351== by 0x11FAEB: udev_event_execute_run (udev-event.c:957)
==351== by 0x11FAEB: worker_spawn (udevd.c:461)
==351== by 0x1216E5: event_run (udevd.c:584)
==351== by 0x1216E5: event_queue_start (udevd.c:823)
==351== by 0x122213: on_uevent (udevd.c:927)
==351== by 0x141F2F: source_dispatch (sd-event.c:2272)
==351== by 0x142D52: sd_event_dispatch (sd-event.c:2631)
==351== by 0x142D52: sd_event_run (sd-event.c:2690)
==351== by 0x142D52: sd_event_loop (sd-event.c:2710)
==351== by 0x1159CB: run (udevd.c:1643)
==351== by 0x1159CB: main (udevd.c:1772)
==351== Block was alloc'd at
==351== at 0x4C2CF35: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==351== by 0x144853: sd_device_set_sysattr_value (sd-device.c:1888)
==351== by 0x132081: udev_device_set_sysattr_value (libudev-device.c:849)
==351== by 0x12E777: set_trackpoint_sensitivity (udev-builtin-keyboard.c:180)
==351== by 0x12E777: builtin_keyboard.lto_priv.170 (udev-builtin-keyboard.c:263)
==351== by 0x14D03F: udev_builtin_run.constprop.75 (udev-builtin.c:133)
==351== by 0x11FAEB: udev_event_execute_run (udev-event.c:957)
==351== by 0x11FAEB: worker_spawn (udevd.c:461)
==351== by 0x1216E5: event_run (udevd.c:584)
==351== by 0x1216E5: event_queue_start (udevd.c:823)
==351== by 0x122213: on_uevent (udevd.c:927)
==351== by 0x141F2F: source_dispatch (sd-event.c:2272)
==351== by 0x142D52: sd_event_dispatch (sd-event.c:2631)
==351== by 0x142D52: sd_event_run (sd-event.c:2690)
==351== by 0x142D52: sd_event_loop (sd-event.c:2710)
==351== by 0x1159CB: run (udevd.c:1643)
==351== by 0x1159CB: main (udevd.c:1772)
This adds /sys/firmware lookup for sysname when creating a new device,
which allows device-tree properties lookup. This look-up can then be
used in udev rules, allowing device-tree-based model detection.
The code is mostly correct, but gcc is trying to outsmart us, and emits a
warning for a "llu vs lu" mismatch, even though they are the same size (on alpha):
src/libsystemd/sd-bus/bus-control.c: In function ‘kernel_get_list’:
src/libsystemd/sd-bus/bus-control.c:267:42: error: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64 {aka long unsigned int}’ [-Werror=format=]
if (asprintf(&n, ":1.%llu", name->id) < 0) {
^
src/libsystemd/sd-bus/bus-control.c: In function ‘bus_get_name_creds_kdbus’:
src/libsystemd/sd-bus/bus-control.c:714:47: error: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64 {aka long unsigned int}’ [-Werror=format=]
if (asprintf(&c->unique_name, ":1.%llu", conn_info->id) < 0) {
^
This is hard to work around properly, because kdbus.h uses __u64 which is
defined-differently-despite-being-the-same-size then uint64_t. Thus the simple
solution of using %PRIu64 fails on amd64:
src/libsystemd/sd-bus/bus-control.c:714:47: error: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘__u64 {aka long long unsigned int}’ [-Werror=format=]
if (asprintf(&c->unique_name, ":1.%"PRIu64, conn_info->id) < 0) {
^~~~~~
Let's just avoid the whole issue for now by silencing the warning.
After the next release, we should just get rid of the kdbus code.
Fixes#5561.
Other functions in sd-login generally allow the output parameter to be NULL, in
which case only the number of items that would be stored in the array is returned.
Be nice and do the same here.
C.f. 0543105b0f.
This makes if /run/systemd/{seats,sessions,users} are missing, then
sd_get_seats(), sd_get_sessions() and sd_get_uids() return 0, that is,
an empty list, instead of -ENOENT.
This fixes commit 5e354b2252 which was an attempt to avoid installation
of tmpfiles.d/systemd-remote.conf when it was not needed (ie HAVE_REMOTE=false).
Before this fix and with the autotool build, systemd-remote.conf was
distributed and also installed (although it was empty) even though
HAVE_REMOTE=false.
That's what happens when doing last second changes without retesting...
While at it, update tmpfiles.d/.gitignore (var.conf was missing as well
since commit a083537e5d).
$ reboot -f
Failed to read reboot parameter file: No such file or directory
It seems that the warning on ENOENT was inadvertently introduced in
27c06cb516.
The warning reported in #5646 comes from systemctl, but let's fix the other
call site in the same way too.
Fixes#5646.
The TAGS file was generated in build/ following what autotools did.
Nevertheless, it's more convenient to put in the source dir.
(It doesn't get deleted by mistake, and it's easier to find for the
editor.)
The -ENOMEDIUM return value was introduced in v232-1001-g2977724b09,
('core: make hybrid cgroup unified mode keep compat /sys/fs/cgroup/systemd hierarchy'),
and would be returned by cg_pid_get_path_shifted(), but the documented and
expected return value is -ENODATA. Let's just catch ENXIO/ENOMEDIUM and translate
it to ENODATA in all cases.
Complements 171f8f591f, fixes#6012.
They require a writable /tmp dir (in the bash implementation).
Let's use echo, and not 'echo -e' since that doesn't seem to be completely
portable.
Fixes#6052.
Some .install plugins does not require that machine ID is set such as
20-grubby.install for Fedora and 50-depmod.install.
To support such plugins to run without valid machine-id, this commit
makes the following change:
* if /etc/machine-id is missing or empty, create temporary directory
and set its path to BOOT_DIR_ABS,
* run the .install helpers with KERNEL_INSTALL_MACHINE_ID environment
variable that'd be empty if /etc/machine-id is missing or empty.
This may be useful for installing kernel for e.g. stateless systems
which initialize machine-id while booting the systems.
Formatting sd-cards does not trigger "change" uevents. As a result clients
using udev API don't get any updates afterwards and get outdated information
about the device.
Include mmcblk* in a match for watch option assignment.
Test ICMPv6 Router Solicitation exponential backoff timer by
computing the minimum and maximum values according to RFC 7559,
Section 2 and the algorithm itself described in RFC 3315, Section
14. Reset the sd_ndisc timer to trigger after a zero second delay,
which causes the ndisc timeout to be triggered immediately once
the caller of the "sending" function returns to the main loop.
Move ICMPv6 Router Solicitation sending after timer computation so
that timers are already set up when the packet is being sent. This
makes it possible to create a test that inspects Router
Solicitation timer values when the Router Solicitation is sent out
on the network.
Instead of sending a fixed amount of Router Solicitiations, implement
the backoff algorithm proposed in RFC 7559. The backoff algorithm is
the same as used by DHCPv6.
Time out after 12s as specified in RFC 4861 in order not to delay
setting up a link for too long while sending Router Solicitations
in the background. Notice that after this change the callback will
receive a SD_NDISC_EVENT_TIMEOUT timeout event, and at a later point
when a router appears, a received Router Advertisment will cause the
callback to be called again with the SD_NDISC_EVENT_ROUTER event.
this patch makes it possible to configure a vlan aware bridge without the
PVID. To configure no PVID set DefaultPVID=none in the [BridgeVLAN] section.
fixes#5716
