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uuid/id128 code rework
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Add support for relative TasksMax= specifications, and bump default for services
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Because /run/systemd/inaccessible/{chr,blk} are devices with
major=0 and minor=0 it might be possible that these devices cannot be created
so we use /run/systemd/inaccessible/sock instead to map them.
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This adds support for a TasksMax=40% syntax for specifying values relative to
the system's configured maximum number of processes. This is useful in order to
neatly subdivide the available room for tasks within containers.
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We currently have code to read and write files containing UUIDs at various
places. Unify this in id128-util.[ch], and move some other stuff there too.
The new files are located in src/libsystemd/sd-id128/ (instead of src/shared/),
because they are actually the backend of sd_id128_get_machine() and
sd_id128_get_boot().
In follow-up patches we can use this reduce the code in nspawn and
machine-id-setup by adopted the common implementation.
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log about all processes we forcibly kill
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Assorted fixes
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Fix a copy/paste mistake.
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Let's lot at LOG_NOTICE about any processes that we are going to
SIGKILL/SIGABRT because clean termination of them didn't work.
This turns the various boolean flag parameters to cg_kill(), cg_migrate() and
related calls into a single binary flags parameter, simply because the function
now gained even more parameters and the parameter listed shouldn't get too
long.
Logging for killing processes is done either when the kill signal is SIGABRT or
SIGKILL, or on explicit request if KILL_TERMINATE_AND_LOG instead of LOG_TERMINATE
is passed. This isn't used yet in this patch, but is made use of in a later
patch.
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namespace: unify limit behavior on non-directory paths
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Despite the name, `Read{Write,Only}Directories=` already allows for
regular file paths to be masked. This commit adds the same behavior
to `InaccessibleDirectories=` and makes it explicit in the doc.
This patch introduces `/run/systemd/inaccessible/{reg,dir,chr,blk,fifo,sock}`
{dile,device}nodes and mounts on the appropriate one the paths specified
in `InacessibleDirectories=`.
Based on Luca's patch from https://github.com/systemd/systemd/pull/3327
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Fix make nulstr confusion
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strv_make_nulstr was creating a nulstr which was not a valid nulstr,
because it was missing the terminating NUL. This didn't cause any issues,
because strv_parse_nulstr correctly parsed the result, using the
separately specified length.
But it's confusing to have something called nulstr which really isn't.
It is likely that somebody will try to use strv_make_nulstr() in
some other place, incorrectly.
This patch changes strv_parse_nulstr() to produce a valid nulstr, and
changes the output length parameter to be the minimum number of bytes
which can be later on parsed by strv_parse_nulstr(). This allows the
only user in ask-password-api to be slightly simplified.
Based-on-patch-by: Jean-Sébastien Bour <jean-sebastien@bour.name>
Fixes #3689.
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https://github.com/SELinuxProject/selinux/commit/9eb9c9327563014ad6a807814e7975424642d5b9
deprecated selinux_context_t. Replace with a simple char* everywhere.
Alternative fix for #3719.
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Commit d054f0a4 ("tree-wide: use xsprintf() where applicable") used a
semantic patch approach to change a number of locations from
snprintf(buf, sizeof(buf), FMT, ...)
to
xsprintf(buf, FMT, ...)
The problem is that xsprintf() wraps the snprintf() in an
assert_message_se(), so if snprintf() reports an overflow of the
destination buffer, the binary will now terminate.
This hit a user running a version of systemd that was built from a
deeply nested system path.
Fix this by
a) Switching back to snprintf() for this particular case. We should really
rather truncate the location string than crash in such situations.
b) Increasing the size of that static string buffer, to make the event more
unlikely.
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basic/fd-util: introduce stdio_unset_cloexec() function
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There are some places in the systemd which are use the same pattern:
fd_cloexec(STDIN_FILENO, false);
fd_cloexec(STDOUT_FILENO, false);
fd_cloexec(STDERR_FILENO, false);
to unset CLOEXEC for standard file descriptors. This patch introduces
the stdio_unset_cloexec() function to hide this and make code cleaner.
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For backwards compatibility, both the new format (Mon..Wed) and
the old format (Mon-Wed) are supported.
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Resolves #3042
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make "machinectl clean" asynchronous, and open it up via PolicyKit
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journalctl: Use env variable TMPDIR to save temporary files
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to hide casting of '-1' strings and make code cleaner.
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Fixes:
```
$ systemctl list-unit-files 'hey\*'
0 unit files listed.
$ systemctl list-unit-files | grep hey
hey\x7eho.service static
```
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background process
This is a follow-up to 5d2036b5f3506bd0ff07042aee8d69c26db32298, and also makes
the "machinectl clean" verb asynchronous, after all it's little more than a
series of image removals.
The changes required to make this happen are a bit more comprehensive as we
need to pass information about deleted images back to the client, as well as
information about the image we failed on if we failed on one. Hence, create a
temporary file in /tmp, serialize that data into, and read it from the parent
after the operation is complete.
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resolved: more fixes, among them "systemctl-resolve --status" to see DNS configuration in effect, and a local DNS stub listener on 127.0.0.53
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It makes use of the sd_listen_fds() call, and as such should live in
src/shared, as the distinction between src/basic and src/shared is that the
latter may use libsystemd APIs, the former does not.
Note that btrfs-util.[ch] and log.[ch] also include header files from
libsystemd, but they only need definitions, they do not invoke any function
from it. Hence they may stay in src/basic.
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variables
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When we return the full RR wire data, let's make sure the TTL included in it is
adjusted by the time the RR sat in the cache.
As an optimization we do this only for ResolveRecord() and not for
ResolveHostname() and friends, since adjusting the TTL means copying the RR
object, and we don#t want to do that if there's no reason to.
(ResolveHostname() and friends don't return the TTL hence there's no reason to
in that case)
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It's like set_put_strdup(), but splits up a string via an extract_first_word()
loop.
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NULL strings nicely
xyz_from_string() functions defined with DEFINE_STRING_TABLE_LOOKUP() properly
handle NULL strings already. make sure the equivalent functions defined with
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN() do the same.
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See:
https://github.com/systemd/systemd/pull/3529#issuecomment-226421007
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networkd: add support for vrf interfaces (#3316)
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various changes, most importantly regarding memory metrics
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executed services
This permits services to detect whether their stdout/stderr is connected to the
journal, and if so talk to the journal directly, thus permitting carrying of
metadata.
As requested by the gtk folks: #2473
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buffer (#3541)
Calling recv with a NULL buffer returns EFAULT instead of EOPNOTSUPP on
older kernels (3.14).
Fixes #3407
Signed-off-by: Kai Ruhnau <kai.ruhnau@target-sg.com>
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Super-important change, yeah!
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This reworks get_process_cmdline() quite substantially, fixing the following:
- Fixes:
https://github.com/systemd/systemd/pull/3512/commits/a4e3bf4d7ac2de51191ce136ee9361ba319e106c#r66837630
- The passed max_length is also applied to the "comm" name, if comm_fallback is
set.
- The right thing happens if max_length == 1 is specified
- when the cmdline "foobar" is abbreviated to 6 characters the result is not
"foobar" instead of "foo...".
- trailing whitespace are removed before the ... suffix is appended. The 7
character abbreviation of "foo barz" is hence "foo..." instead of "foo ...".
- leading whitespace are suppressed from the cmdline
- a comprehensive test case is added
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The various bits of code did the scaling all different, let's unify this,
given that the code is not trivial.
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And port a couple of users over to it.
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limit into account
When determining the amount of RAM in the system, let's make sure we also read
the root-level cgroup memory limit into account. This isn't particularly useful
on the host, but in containers it makes sure that whatever memory the container
got assigned is actually used for RAM size calculations.
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