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Commits 27cc6f166 and f25afeb broke path_is_mount_point() for files (such as
/etc/machine-id → /run/machine-id bind mounts) as with the factorization of
fd_is_mount_point() we lost the parent directory. We cannot determine that from
an fd only as openat(fd, "..") only works for directory fds.
Change fd_is_mount_point() to behave like openat(): It now takes a file
descriptor of the containing directory, a file name in it, and flags (which can
be 0 or AT_SYMLINK_FOLLOW). Unlike name_to_handle_at() or openat(), fstatat()
only accepts the inverse flag AT_SYMLINK_NOFOLLOW and complains with EINVAL
about AT_SYMLINK_FOLLOW; so we need to transform the flags for that fallback.
Adjust rm_rf_children() accordingly (only other caller of fd_is_mount_point()
aside from path_is_mount_point()).
Add test cases for files, links, and file bind mounts (the latter will only
work when running as root). Split out a new test_path_is_mount_point() test
case function as it got significantly larger now.
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Otherwise building faild with kernel headers < v3.16
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In generated systemd-fsck-root.service. This would break if rootprefix
is not /usr/lib/systemd.
[tomegun: flesh out commit message]
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Use strjoina to avoid error handling, and openat to simplify things.
Some fixes on the way:
- ferror does not set errno, so the return value was wrong in some cases
- errors are propagated in more cases
- EFI/systemd was created, but EFI/systemd-boot was deleted
- something is always printed on error
- when checking the version, comparison was done against "systemd-bo" for some reason
- return value was converted from negative to EXIT_SUCCESS/EXIT_FAILURE twice,
resulting in EXIT_SUCCESS all the time
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This makes working with complexly structured documents easy
and more reliable as the parser is not susceptible to
element re-ordering.
Also fixes a bug when the tokenizer would choke after reading
a number.
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Added (sha256) digest validation function
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The hostname(1) tool allows comments in /etc/hostname. Introduce a new
read_hostname_config() in hostname-util which reads a hostname configuration
file like /etc/hostname, strips out comments, whitespace, and cleans the
hostname. Use it in hostname-setup.c and hostnamed and remove duplicated code.
Update hostname manpage. Add tests.
https://launchpad.net/bugs/1053048
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This allows us to ensure that Requisite= dependencies never cause
propagation between units, while Requires= dependencies might.
http://lists.freedesktop.org/archives/systemd-devel/2015-May/031742.html
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All functions should either log the errors they run into, or only return
them in which case the caller should log them.
Make sure this rule is followed, so that each error is logged precisely
once, and neither never, nor more than once.
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Reported by Cristian Rodríguez
http://lists.freedesktop.org/archives/systemd-devel/2015-May/031626.html
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Currently we have no way how to specify dependencies between fstab
entries (or another units) in the /etc/fstab. It means that users are
forced to bypass fstab and write .mount units manually.
The patch introduces new systemd fstab options:
x-systemd.requires=<PATH>
- to specify dependence an another mount (PATH is translated to unit name)
x-systemd.requires=<UNIT>
- to specify dependence on arbitrary UNIT
x-systemd.requires-mounts-for=<PATH ...>
- to specify dependence on another paths, implemented by
RequiresMountsFor=. The option may be specified more than once.
For example two bind mounts where B depends on A:
/mnt/test/A /mnt/test/A none bind,defaults
/mnt/test/A /mnt/test/B none bind,x-systemd.requires=/mnt/test/A
More complex example with overlay FS where one mount point depends on
"low" and "upper" directories:
/dev/sdc1 /mnt/low ext4 defaults
/dev/sdc2 /mnt/high ext4 defaults
overlay /mnt/merged overlay lowerdir=/mnt/low,upperdir=/mnt/high/data,workdir=/mnt/high/work,x-systemd.requires-mounts-for=/mnt/low,x-systemd.requires-mounts-for=mnt/high
https://bugzilla.redhat.com/show_bug.cgi?id=812826
https://bugzilla.redhat.com/show_bug.cgi?id=1164334
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write() can send empty messages, so make sure loop_write() can do the same.
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Given that socket_address_parse() is mostly a "library" call it
shouldn't log on its own, but leave that to its caller.
This patch removes logging from the call in case IPv6 is not available
but and IPv6 address shall be parsed. Instead a new call
socket_address_parse_and_warn() is introduced which first invokes
socket_address_parse() and then logs if necessary.
This should fix "make check" on ipv6-less kernels:
http://lists.freedesktop.org/archives/systemd-devel/2015-April/031385.html
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https://bugs.freedesktop.org/show_bug.cgi?id=89248
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https://bugs.freedesktop.org/show_bug.cgi?id=42940
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https://bugs.freedesktop.org/show_bug.cgi?id=90385
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GNU memmem() requires a nonnull first parameter. Let's introduce
memmem_safe() that removes this restriction for zero-length parameters,
and make use of it where appropriate.
http://lists.freedesktop.org/archives/systemd-devel/2015-May/031705.html
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So far a number of utilities implemented their own calls for this, unify
them in prefix_root() and prefix_roota(). The former uses heap memory,
the latter allocates from the stack via alloca().
Port over most users of a --root= logic.
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If a symlink to a combined cgroup hierarchy already exists and points to
the right path, skip it. This avoids an error when the cgroups are set
manually before calling nspawn.
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In this usecase, the file will never be materialized
with linkat().
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This allows us to simplify the ctrl_msg handler. Eventually all this global state should move to
a Manager object or so.
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All other types exported from install.h should be namespaces like this,
hence namespace InstallInfo the same way.
Also, remove external forward definition of UnitFileScope type.
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It's primarily just a property of the Manager object after all, and we
try to refer to PID 1 as "manager" instead of "systemd", hence let's to
stick to this here too.
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This changes log_unit_info() (and friends) to take a real Unit* object
insted of just a unit name as parameter. The call will now prefix all
logged messages with the unit name, thus allowing the unit name to be
dropped from the various passed romat strings, simplifying invocations
drastically, and unifying log output across messages. Also, UNIT= vs.
USER_UNIT= is now derived from the Manager object attached to the Unit
object, instead of getpid(). This has the benefit of correcting the
field for --test runs.
Also contains a couple of other logging improvements:
- Drops a couple of strerror() invocations in favour of using %m.
- Not only .mount units now warn if a symlinks exist for the mount
point already, .automount units do that too, now.
- A few invocations of log_struct() that didn't actually pass any
additional structured data have been replaced by simpler invocations
of log_unit_info() and friends.
- For structured data a new LOG_UNIT_MESSAGE() macro has been added,
that works like LOG_MESSAGE() but prefixes the message with the unit
name. Similar, there's now LOG_LINK_MESSAGE() and
LOG_NETDEV_MESSAGE().
- For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(),
LOG_NETDEV_INTERFACE() macros have been added that generate the
necessary per object fields. The old log_unit_struct() call has been
removed in favour of these new macros used in raw log_struct()
invocations. In addition to removing one more function call this
allows generated structured log messages that contain two object
fields, as necessary for example for network interfaces that are
joined into another network interface, and whose messages shall be
indexed by both.
- The LOG_ERRNO() macro has been removed, in favour of
log_struct_errno(). The latter has the benefit of ensuring that %m in
format strings is properly resolved to the specified error number.
- A number of logging messages have been converted to use
log_unit_info() instead of log_info()
- The client code in sysv-generator no longer #includes core code from
src/core/.
- log_unit_full_errno() has been removed, log_unit_full() instead takes
an errno now, too.
- log_unit_info(), log_link_info(), log_netdev_info() and friends, now
avoid double evaluation of their parameters
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Under the assumption that strcmp() is cheaper than memory allocation,
let's avoid the allocation, if the new value is identical to the old.
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In the initrafms, generate a systemd-fsck-root.service to replace
systemd-fsck@<sysroot-device>.service. This way, after we transition
to the real root, systemd-fsck-root.service is marked as already done.
This introduces an unnecessary synchronization point, because
systemd-fsck@* is ordered after systemd-fsck-root also in the
initramfs. In practice this shouldn't be a problem.
https://bugzilla.redhat.com/show_bug.cgi?id=1201979
C.f. 956eaf2b8d6c9999024705ddadc7393bc707de02.
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Continuing the general trend of splitting up util.[ch]. I specifically
want to reuse this code in https://github.com/GNOME/libglnx and
having it split up will make future copy-pasting easier.
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machined is getting an EACCES when trying to create the lock file for
images because the mode on /run/systemd/nspawn/locks is 0600.
mkdir("/run/systemd/nspawn/locks", 0600) = -1 EEXIST (File exists)
stat("/run/systemd/nspawn/locks", {st_mode=S_IFDIR|0600, st_size=40, ...}) = 0
open("/run/systemd/nspawn/locks/inode-41:256", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC, 0600) = -1 EACCES (Permission denied)
This commit adjusts the mode to 0700 to correct the issue.
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from unit names
Let's better be safe then sorry.
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A variety of changes:
- Make sure all our calls distuingish OOM from other errors if OOM is
not the only error possible.
- Be much stricter when parsing escaped paths, do not accept trailing or
leading escaped slashes.
- Change unit validation to take a bit mask for allowing plain names,
instance names or template names or an combination thereof.
- Refuse manipulating invalid unit name
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We should be more strict when verifying paths with path_is_safe() for
potentially dangerous constructs, and that includes lengths of
PATH_MAX-1 and larger. Be more accurate here.
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This makes it obvious that those functions are only usable in the
initramfs.
Also, add a warning when noauto, nofail, or automount is used for the
root fs, instead of silently ignoring. Using those options would be a
sign of significant misconfiguration, and if we bother to check for
them, than let's go all the way and complain.
Other various small cleanups and reformattings elsewhere.
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instance of a process
units are organized in slice trees, not only for the system instance,
but also for user systemd instances, expose this properly.
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