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Case sensitive or case insensitive matching can be requested using
--case-sensitive[=yes|no].
Unless specified, matching is case sensitive if the pattern contains any
uppercase letters, and case insensitive otherwise. This matches what
forward-search does in emacs, and recently also --ignore-case in less. This
works surprisingly well, because usually when one is wants to do case-sensitive
matching, the pattern is usually camel-cased. In the less frequent case when
case-sensitive matching is required with an all-lowercase pattern,
--case-sensitive can be used to override the automatic logic.
This PR allows to write sysuser.conf lines like:
```
u games 5:60 -
```
This will create an a "games" user with uid 5 and games group with
gid 60. This is arguable ugly, however it is required to represent
certain configurations like the default passwd file on Debian and
Ubuntu.
When the ":" syntax is used and there is a group with the given
gid already then no new group is created. This allows writing the
following:
```
g unrelated 60
u games 5:60 -
```
which will create a "games" user with the uid 5 and the primary
gid 60. No group games is created here (might be useful for [1]).
[1] https://pagure.io/packaging-committee/issue/442
CHANGE OF BEHAVIOUR — with this commit "f" line's behaviour is altered
to match what the documentation says: if an "argument" string is
specified it is written to the file only when the file didn't exist
before. Previously, it would be appended to the file each time
systemd-tmpfiles was invoked — which is not a particularly useful
behaviour as the tool is not idempotent then and the indicated files
grow without bounds each time the tool is invoked.
I did some spelunking whether this change in behaviour would break
things, but afaics nothing relies on the previous O_APPEND behaviour of
this line type, hence I think it's relatively safe to make "f" lines
work the way the docs say, rather than adding a new modifier for it or
so.
Triggered by:
https://lists.freedesktop.org/archives/systemd-devel/2018-January/040171.html
Currently, we create leading directories implicitly for all lines that
create directory or directory-like nodes.
With this, we also do the same for a number of other lines: f/F, C, p,
L, c/b (that is regular files, pipes, symlinks, device nodes as well as
file trees we copy).
The leading directories are created with te default access mode of 0755.
If something else is desired, users should simply declare appropriate
"d" lines.
Fixes: #7853
New debug verb that enables or disables the service runtime watchdogs
and emergency actions during runtime. This is the systemd-analyze
version of the systemd.service_watchdogs command line option.
The DHCPv6 client can obtain configuration parameters from a
DHCPv6 server through a rapid two-message exchange solicit and reply).
When the rapid commit option is enabled by both the DHCPv6 client and
the DHCPv6 server, the two-message exchange is used, rather than the default
four-method exchange (solicit, advertise, request, and reply). The two-message
exchange provides faster client configuration and is beneficial in environments
in which networks are under a heavy load.
Closes#5845
sd_journal_stream_fd() does not return the same file descriptor across
different calls. It can't possibly do so, because the file descriptor
is created using certain parameters passed by the caller.
Also the implementation clearly isn't doing this, it's just connecting
to a unix socket.
It opens exactly one file descriptor, and does not close it unless there
is a write failure. Nothing like "temporarily multiple file descriptors
may be open".
These restrictions are implied by systemd options used for
systemd-udevd.service, i.e. MountFlags=slave and
IPAddressDeny=any. However, there are users out there getting tripped by
this, so let's make things clear in the man page so the actual
restrictions we implement by default have better visibility.
Follow-up for e79eabdb1b. There was an
apparent contradiction:
man/systemd.unit says for Requires=:
Besides, with or without specifying After=, this unit will be deactivated
if one of the other units get deactivated.
Also, some unit types may deactivate on their own (for example, a service
process may decide to exit cleanly, or a device may be unplugged by the
user), which is not propagated to units having a Requires= dependency.
Fixes#7870.
Let's be more restrictive when validating PID files and MAINPID=
messages: don't accept PIDs that make no sense, and if the configuration
source is not trusted, don't accept out-of-cgroup PIDs. A configuratin
source is considered trusted when the PID file is owned by root, or the
message was received from root.
This should lock things down a bit, in case service authors write out
PID files from unprivileged code or use NotifyAccess=all with
unprivileged code. Note that doing so was always problematic, just now
it's a bit less problematic.
When we open the PID file we'll now use the CHASE_SAFE chase_symlinks()
logic, to ensure that we won't follow an unpriviled-owned symlink to a
privileged-owned file thinking this was a valid privileged PID file,
even though it really isn't.
Fixes: #6632
The new --uid= switch allows selecting the UID from which the
notificaiton messages shall originate.
This is primarily useful for testing purposes, but might have other
uses.
