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commit
b0003b86fb
36
TODO
36
TODO
@ -496,11 +496,11 @@ Features:
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* add a new EFI tool "sd-fetch" or so. It looks in a PE section ".url" for an
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URL, then downloads the file from it using UEFI HTTP APIs, and executes it.
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Usecase: provide a minimal ESP with sd-boot and a couple of these sd-fetch
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Use case: provide a minimal ESP with sd-boot and a couple of these sd-fetch
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binaries in place of UKIs, and download them on-the-fly.
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* maybe: systemd-loop-generator that sets up loopback devices if requested via kernel
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cmdline. usecase: include encrypted/verity root fs in UKI.
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cmdline. use case: include encrypted/verity root fs in UKI.
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* systemd-gpt-auto-generator: add kernel cmdline option to override block
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device to dissect. also support dissecting a regular file. useccase: include
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@ -573,7 +573,7 @@ Features:
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subsequent boots?
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* provide an API (probably IPC) to apps to encrypt/decrypt
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credentials. usecase: allow bluez bluetooth daemon to pass pairings to initrd
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credentials. use case: allow bluez bluetooth daemon to pass pairings to initrd
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that way, without shelling out to our tools.
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* revisit default PCR bindings in cryptenroll and systemd-creds. Currently they
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@ -631,7 +631,7 @@ Features:
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* systemd-repart: in addition to the existing "factory reset" mode (which
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simply empties existing partitions marked for that). add a mode where
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partitions marked for it are entirely removed. Usecase: remove secondary OS
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partitions marked for it are entirely removed. Use case: remove secondary OS
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copy, and redundant partitions entirely, and recreate them anew.
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* systemd-boot: maybe add support for collapsing menu entries of the same OS
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@ -677,7 +677,7 @@ Features:
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* add support for asymmetric LUKS2 TPM based encryption. i.e. allow preparing
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an encrypted image on some host given a public key belonging to a specific
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other host, so that only hosts possessing the private key in the TPM2 chip
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can decrypt the volume key and activate the volume. Usecase: systemd-confext
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can decrypt the volume key and activate the volume. Use case: systemd-confext
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for a central orchestrator to generate confext images securely that can only
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be activated on one specific host (which can be used for installing a bunch
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of creds in /etc/credstore/ for example). Extending on this: allow binding
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@ -690,7 +690,7 @@ Features:
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current system state, i.e. a combination of PCR information, local system
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time and TPM clock, running services, recent high-priority log
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messages/coredumps, system load/PSI, signed by the local TPM chip, to form an
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enhanced remote attestation quote. Usecase: a simple orchestrator could use
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enhanced remote attestation quote. Use case: a simple orchestrator could use
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this: have the report tool upload these reports every 3min somewhere. Then
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have the orchestrator collect these reports centrally over a 3min time
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window, and use them to determine what which node should now start/stop what,
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@ -745,7 +745,7 @@ Features:
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* Add "purpose" flag to partition flags in discoverable partition spec that
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indicate if partition is intended for sysext, for portable service, for
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booting and so on. Then, when dissecting DDI allow specifying a purpose to
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use as additional search condition. Usecase: images that combined a sysext
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use as additional search condition. Use case: images that combined a sysext
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partition with a portable service partition in one.
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* On boot, auto-generate an asymmetric key pair from the TPM,
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@ -861,7 +861,7 @@ Features:
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usr=
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• systemd-homed: when initializing, look for a credential
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systemd.homed.register or so with JSON user records to automatically
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register if not registered yet. Usecase: deploy a system, and add an
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register if not registered yet. Use case: deploy a system, and add an
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account one can directly log into.
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• in gpt-auto-generator: check partition uuids against such uuids supplied via
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sd-stub credentials. That way, we can support parallel OS installations with
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@ -887,7 +887,7 @@ Features:
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* sd-boot: instead of unconditionally deriving the ESP to search boot loader
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spec entries in from the paths of sd-boot binary, let's optionally allow it
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to be configured on sd-boot cmdline + efi var. Usecase: embed sd-boot in the
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to be configured on sd-boot cmdline + efi var. Use case: embed sd-boot in the
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UEFI firmware (for example, ovmf supports that via qemu cmdline option), and
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use it to load stuff from the ESP.
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@ -927,7 +927,7 @@ Features:
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* homed/userdb: maybe define a "companion" dir for home directories where apps
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can safely put privileged stuff in. Would not be writable by the user, but
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still conceptually belong to the user. Would be included in user's quota if
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possible, even if files are not owned by UID of user. Usecase: container
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possible, even if files are not owned by UID of user. Use case: container
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images that owned by arbitrary UIDs, and are owned/managed by the users, but
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are not directly belonging to the user's UID. Goal: we shouldn't place more
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privileged dirs inside of unprivileged dirs, and thus containers really
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@ -1032,7 +1032,7 @@ Features:
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look for right in the sd-boot binary. i.e. take inspiration from sd-stub
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logic: allow combining sd-boot via ukify with kernels to enumerate, .conf
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files, drivers, keys to enroll and so on. Then, add whatever we find that way
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to the menu. Usecase: allow building a single PE image you can boot into via
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to the menu. Use case: allow building a single PE image you can boot into via
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UEFI HTTP boot.
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* maybe add a new UEFI stub binary "sd-http". It works similar to sd-stub, but
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@ -1053,7 +1053,7 @@ Features:
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* maybe add a generator that reads /proc/cmdline, looks for
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systemd.pull-raw-portable=, systemd-pull-raw-sysext= and similar switches
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that take a URL as parameter. It then generates service units for
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systemd-pull calls that download these URLs if not installed yet. usecase:
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systemd-pull calls that download these URLs if not installed yet. Use case:
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invoke a VM or nspawn container in a way it automatically deploys/runs these
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images as OS payloads. i.e. have a generic OS image you can point to any
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payload you like, which is then downloaded, securely verified and run.
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@ -1152,9 +1152,9 @@ Features:
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* add tiny service that decrypts encrypted user records passed via initrd
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credential logic and drops them into /run where nss-systemd can pick them up,
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similar to /run/host/userdb/. Usecase: drop a root user JSON record there,
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similar to /run/host/userdb/. Use case: drop a root user JSON record there,
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and use it in the initrd to log in as root with locally selected password,
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for debugging purposes. Other usecase: boot into qemu with regular user
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for debugging purposes. Other use case: boot into qemu with regular user
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mounted from host. maybe put this in systemd-user-sessions.service?
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* drop dependency on libcap, replace by direct syscalls based on
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@ -1262,7 +1262,7 @@ Features:
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the resulting fd to the service program via socket activation proto.
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* Add a concept of ListenStream=anonymous to socket units: listen on a socket
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that is deleted in the fs. Usecase would be with ConnectSocket= above.
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that is deleted in the fs. Use case would be with ConnectSocket= above.
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* importd: support image signature verification with PKCS#7 + OpenBSD signify
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logic, as alternative to crummy gpg
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@ -1552,7 +1552,7 @@ Features:
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else. Similar, ManagerSlice= should exist so that PID1's own scope unit could
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be moved somewhere else too. Finally machined and logind should get similar
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options so that it is possible to move user session scopes and machines to a
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different slice too by default. Usecase: people who want to put resources on
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different slice too by default. Use case: people who want to put resources on
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the entire system, with the exception of one specific service. See:
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https://lists.freedesktop.org/archives/systemd-devel/2018-February/040369.html
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@ -1852,7 +1852,7 @@ Features:
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- generate better errors when people try to set transient properties
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that are not supported...
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https://lists.freedesktop.org/archives/systemd-devel/2015-February/028076.html
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- maybe introduce WantsMountsFor=? Usecase:
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- maybe introduce WantsMountsFor=? Use case:
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https://lists.freedesktop.org/archives/systemd-devel/2015-January/027729.html
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- recreate systemd's D-Bus private socket file on SIGUSR2
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- move PAM code into its own binary
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@ -1924,7 +1924,7 @@ Features:
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* BootLoaderSpec: Define a way how an installer can figure out whether a BLS
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compliant boot loader is installed.
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* think about requeuing jobs when daemon-reload is issued? usecase:
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* think about requeuing jobs when daemon-reload is issued? use case:
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the initrd issues a reload after fstab from the host is accessible
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and we might want to requeue the mounts local-fs acquired through
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that automatically.
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@ -32,7 +32,7 @@ maintains a duplicate of it (in the sense of UNIX
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also in possession of the service itself, and it may (and is expected to)
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invoke any operations on it that it likes.
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The primary usecase of this logic is to permit services to restart seamlessly
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The primary use case of this logic is to permit services to restart seamlessly
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(for example to update them to a newer version), without losing execution
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context, dropping pinned resources, terminating established connections or even
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just momentarily losing connectivity. In fact, as the file descriptors can be
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@ -81,7 +81,7 @@ And that's already the gist of it.
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A system service that provides a client-facing interface that shall be able to
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seamlessly restart can make use of this in a scheme like the following:
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whenever a new connection comes in it uploads its fd immediately into its
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fdstore. At approporate times it also serializes its state into a memfd it
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fdstore. At appropriate times it also serializes its state into a memfd it
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uploads to the service manager — either whenever the state changed
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sufficiently, or simply right before it terminates. (The latter of course means
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that state only survives on *clean* restarts and abnormal termination implies the
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@ -104,7 +104,7 @@ lifecycle management (i.e. `KillMode=none` must be set), which disables large
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parts of the service managers state tracking, resource management (as resource
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counters cannot start at zero during service activation anymore, since the old
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processes remaining skew them), security policies (as processes with possibly
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out-of-date security policies – selinux, AppArmor, any LSM, seccomp, BPF — in
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out-of-date security policies – SElinux, AppArmor, any LSM, seccomp, BPF — in
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effect remain), and similar.
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# File Descriptor Store Lifecycle
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@ -176,7 +176,7 @@ This mechanism can be enabled either by making sure the service survives until
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the very end (i.e. by setting `DefaultDependencies=no` so that it keeps running
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for the whole system lifetime without being regularly deactivated at shutdown)
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or by setting `FileDescriptorStorePresever=yes` (and referencing the unit
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continously).
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continuously).
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# Debugging
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@ -512,7 +512,7 @@
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together the former is applied first. If a directory listed already exists no operation is executed
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(in particular, the ownership/access mode of the directories is left as is).</para>
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<para>The primary usecase for this option is to create a minimal set of directories that may be
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<para>The primary use case for this option is to create a minimal set of directories that may be
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mounted over by other partitions contained in the same disk image. For example, a disk image where
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the root file system is formatted at first boot might want to automatically pre-create
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<filename>/usr/</filename> in it this way, so that the <literal>usr</literal> partition may
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@ -114,7 +114,7 @@
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for details. For file descriptors pushed into the file descriptor
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store (see above), the name is set via the
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<varname>FDNAME=</varname> field transmitted via
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<function>sd_pid_notify_with_fds()</function>. The primary usecase
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<function>sd_pid_notify_with_fds()</function>. The primary use case
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for these names are services which accept a variety of file
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descriptors which are not recognizable with functions like
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<function>sd_is_socket()</function> alone, and thus require
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@ -1485,11 +1485,11 @@ After=sys-subsystem-net-devices-ens1.device</programlisting>
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multiple times for creating multiple independent bind mount points.</para>
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<para>Mount options are comma-separated. <option>rbind</option> and <option>norbind</option> control whether
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to create a recursive or a regular bind mount. Defaults to "rbind". <option>noidmap</option>,
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to create a recursive or a regular bind mount. Defaults to <option>rbind</option>. <option>noidmap</option>,
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<option>idmap</option>, and <option>rootidmap</option> control ID mapping.</para>
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<para>Using <option>idmap</option> or <option>rootidmap</option> requires support by the source filesystem
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for user/group ID mapped mounts. Defaults to "noidmap". With <option>x</option> being the container's UID range
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for user/group ID mapped mounts. Defaults to <option>noidmap</option>. With <option>x</option> being the container's UID range
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offset, <option>y</option> being the length of the container's UID range, and <option>p</option> being the
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owner UID of the bind mount source inode on the host:
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@ -135,7 +135,7 @@
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after sending the signal configured with
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<varname>KillSignal=</varname>. This is useful to indicate to
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shells and shell-like programs that their connection has been
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severed. Takes a boolean value. Defaults to "no".
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severed. Takes a boolean value. Defaults to <literal>no</literal>.
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</para>
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<xi:include href="version-info.xml" xpointer="v207"/></listitem>
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@ -151,7 +151,7 @@
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<varname>KillMode=</varname> of <constant>control-group</constant>
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or <constant>mixed</constant> service will not restart if
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processes from prior services exist within the control group.
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Takes a boolean value. Defaults to "yes".
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Takes a boolean value. Defaults to <literal>yes</literal>.
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</para>
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<xi:include href="version-info.xml" xpointer="v187"/></listitem>
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@ -797,7 +797,7 @@ CPUWeight=20 DisableControllers=cpu / \
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not applied to any sockets passed into the service via socket activation. Thus, it is usually a
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good idea to replicate the IP access lists on both the socket and the service unit. Nevertheless,
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it may make sense to maintain one list more open and the other one more restricted, depending on
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the usecase.</para>
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the use case.</para>
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<para>If these settings are used multiple times in the same unit the specified lists are combined. If an
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empty string is assigned to these settings the specific access list is reset and all previous settings undone.</para>
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@ -1041,7 +1041,7 @@ RestrictNetworkInterfaces=~eth1</programlisting>
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for it. Conversely, the IP filter programs configured for the service are not applied to any sockets passed into
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the service via socket activation. Thus, it is usually a good idea, to replicate the IP filter programs on both
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the socket and the service unit, however it often makes sense to maintain one configuration more open and the other
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one more restricted, depending on the usecase.</para>
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one more restricted, depending on the use case.</para>
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<para>Note that these settings might not be supported on some systems (for example if eBPF control group
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support is not enabled in the underlying kernel or container manager). These settings will fail the service in
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@ -14,7 +14,7 @@
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/* Note: on GCC "no_sanitize_address" is a function attribute only, on llvm it may also be applied to global
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* variables. We define a specific macro which knows this. Note that on GCC we don't need this decorator so much, since
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* our primary usecase for this attribute is registration structures placed in named ELF sections which shall not be
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* our primary use case for this attribute is registration structures placed in named ELF sections which shall not be
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* padded, but GCC doesn't pad those anyway if AddressSanitizer is enabled. */
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#if HAS_FEATURE_ADDRESS_SANITIZER && defined(__clang__)
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#define _variable_no_sanitize_address_ __attribute__((__no_sanitize_address__))
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@ -3,7 +3,7 @@
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#include "macro.h"
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/* An embeddable structure carrying a reference to a process. Supposed to be used when tracking processes continously. */
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/* An embeddable structure carrying a reference to a process. Supposed to be used when tracking processes continuously. */
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typedef struct PidRef {
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pid_t pid; /* always valid */
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int fd; /* only valid if pidfd are available in the kernel, and we manage to get an fd */
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@ -57,7 +57,7 @@
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* Rules regarding adding further high level targets like the above:
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*
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* - Be conservative, only add more of these when we really need
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* them. We need strong usecases for further additions.
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* them. We need strong use cases for further additions.
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*
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* - When there can be multiple implementations running side-by-side,
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* it needs to be a .target unit which can pull in all
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|
@ -42,7 +42,7 @@ assert_cc(offsetof(BaseBlock, type) == 28);
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assert_cc(offsetof(BaseBlock, root_cell_offset) == 36);
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/* All offsets are relative to the base block and technically point to a hive
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* cell struct. But for our usecase we don't need to bother about that one,
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* cell struct. But for our use case we don't need to bother about that one,
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* so skip over the cell_size uint32_t. */
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#define HIVE_CELL_OFFSET (sizeof(BaseBlock) + 4)
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@ -139,7 +139,7 @@ static bool is_root_cgroup(const char *path) {
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*
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* Note that checking for a container environment is kinda ugly, since in theory people could use cgtop from
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* inside a container where cgroup namespacing is turned off to watch the host system. However, that's mostly a
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* theoretic usecase, and if people actually try all they'll lose is accounting for the top-level cgroup. Which
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* theoretic use case, and if people actually try all they'll lose is accounting for the top-level cgroup. Which
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* isn't too bad. */
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if (detect_container() > 0)
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@ -2453,7 +2453,7 @@ int bus_exec_context_set_transient_property(
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* and we should not "lose precision" in our types on the way. That said, I am pretty sure
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* actually encoding binary data as unit metadata is not a good idea. Hence we actually refuse
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* any actual binary data, and only accept UTF-8. This allows us to eventually lift this
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* limitation, should a good, valid usecase arise. */
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* limitation, should a good, valid use case arise. */
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r = sd_bus_message_read_array(message, 'y', &p, &sz);
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if (r < 0)
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@ -737,7 +737,7 @@ static int parse_argv(int argc, char *argv[]) {
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if (streq(optarg, "-"))
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/* An undocumented feature: we can read journal files from STDIN. We don't document
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* this though, since after all we only support this for mmap-able, seekable files, and
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* not for example pipes which are probably the primary usecase for reading things from
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* not for example pipes which are probably the primary use case for reading things from
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* STDIN. To avoid confusion we hence don't document this feature. */
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arg_file_stdin = true;
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else {
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@ -148,7 +148,7 @@ int device_set_syspath(sd_device *device, const char *_syspath, bool verify) {
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_cleanup_close_ int fd = -EBADF;
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/* The input path maybe a symlink located outside of /sys. Let's try to chase the symlink at first.
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* The primary usecase is that e.g. /proc/device-tree is a symlink to /sys/firmware/devicetree/base.
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* The primary use case is that e.g. /proc/device-tree is a symlink to /sys/firmware/devicetree/base.
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* By chasing symlinks in the path at first, we can call sd_device_new_from_path() with such path. */
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r = chase(_syspath, NULL, 0, &syspath, &fd);
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if (r == -ENOENT)
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@ -816,7 +816,7 @@ static void dns_transaction_cache_answer(DnsTransaction *t) {
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t->answer_rcode,
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t->answer,
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DNS_PACKET_CD(t->received) ? t->received : NULL, /* only cache full packets with CD on,
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* since our usecase for caching them
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* since our use case for caching them
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* is "bypass" mode which is only
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* enabled for CD packets. */
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t->answer_query_flags,
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@ -1825,7 +1825,7 @@ int partition_pick_mount_options(
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* anymore (since in some cases the kernel implementations will refuse mounting when corrupted,
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* read-only and "norecovery" is specified). But I think for the case of automatically determined
|
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* mount options for loopback devices this is the right choice, since otherwise using the same
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* loopback file twice even in read-only mode, is going to fail badly sooner or later. The usecase of
|
||||
* loopback file twice even in read-only mode, is going to fail badly sooner or later. The use case of
|
||||
* making reuse of the immutable images "just work" is more relevant to us than having read-only
|
||||
* access that actually modifies stuff work on such image files. Or to say this differently: if
|
||||
* people want their file systems to be fixed up they should just open them in writable mode, where
|
||||
|
@ -54,7 +54,7 @@ struct ImagePolicy {
|
||||
PartitionPolicy policies[]; /* sorted by designator, hence suitable for binary search */
|
||||
};
|
||||
|
||||
/* Default policies for various usecases */
|
||||
/* Default policies for various use cases */
|
||||
extern const ImagePolicy image_policy_allow;
|
||||
extern const ImagePolicy image_policy_deny;
|
||||
extern const ImagePolicy image_policy_ignore;
|
||||
|
@ -18,7 +18,7 @@ int fs_make_very_read_only(int fd) {
|
||||
|
||||
assert(fd >= 0);
|
||||
|
||||
/* Tries to make the specified fd "comprehensively" read-only. Primary usecase for this is OS images,
|
||||
/* Tries to make the specified fd "comprehensively" read-only. Primary use case for this is OS images,
|
||||
* i.e. either loopback files or larger directory hierarchies. Depending on the inode type and
|
||||
* backing file system this means something different:
|
||||
*
|
||||
|
@ -3278,7 +3278,7 @@ static int patch_var_run(const char *fname, unsigned line, char **path) {
|
||||
* might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
|
||||
* but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
|
||||
* /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
|
||||
* the latter. Moreover files below this path are by far the primary usecase for tmpfiles.d/. */
|
||||
* the latter. Moreover files below this path are by far the primary use case for tmpfiles.d/. */
|
||||
|
||||
k = path_startswith(*path, "/var/run/");
|
||||
if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
|
||||
|
@ -12,9 +12,9 @@ Description=Wait Until Kernel Time Synchronized
|
||||
Documentation=man:systemd-time-wait-sync.service(8)
|
||||
|
||||
# Note that this tool doesn't need CAP_SYS_TIME itself, but its primary
|
||||
# usecase is to run in conjunction with a local NTP service such as
|
||||
# use case is to run in conjunction with a local NTP service such as
|
||||
# systemd-timesyncd.service, which is conditioned this way. There might be
|
||||
# niche usecases where running this service independently is desired, but let's
|
||||
# niche use cases where running this service independently is desired, but let's
|
||||
# make this all "just work" for the general case, and leave it to local
|
||||
# modifications to make it work in the remaining cases.
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user