We would accept e.g. FailureAction=reboot-force in user units and then do an
exit in the user manager. Let's be stricter, and define "exit"/"exit-force" as
the only supported actions in user units.
v2:
- rename 'exit' to 'exit-force' and add new 'exit'
- add test for the parsing function
"ExitCode" is a bit of a misnomer in two ways: it suggests this was
about the "exit code" concept that exit()/waitid() deal with, but really
isn't. Moreover, it's not event just about exiting either, but more
often about reloading/reexecing or rebooting. Let's hence pick a new
name for this that is a bit more correct.
I initially thought about naming this the "state", but that'd be a
misnomer too, as the value really encodes a "goal" more than a current
state. Also we already have the externally visible ManagerState.
No actual changes in behaviour, just the rename.
These lines are generally out-of-date, incomplete and unnecessary. With
SPDX and git repository much more accurate and fine grained information
about licensing and authorship is available, hence let's drop the
per-file copyright notice. Of course, removing copyright lines of others
is problematic, hence this commit only removes my own lines and leaves
all others untouched. It might be nicer if sooner or later those could
go away too, making git the only and accurate source of authorship
information.
This part of the copyright blurb stems from the GPL use recommendations:
https://www.gnu.org/licenses/gpl-howto.en.html
The concept appears to originate in times where version control was per
file, instead of per tree, and was a way to glue the files together.
Ultimately, we nowadays don't live in that world anymore, and this
information is entirely useless anyway, as people are very welcome to
copy these files into any projects they like, and they shouldn't have to
change bits that are part of our copyright header for that.
hence, let's just get rid of this old cruft, and shorten our codebase a
bit.
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.
I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
This is primarily preparation for a follow-up commit that adds a common
implementation of the other side of the reboot parameter file, i.e. the
code that reads the file and issues reboot() for it.
This mimics the raw_clone() call we have in place already and
establishes a new syscall wrapper raw_reboot() that wraps the kernel's
reboot() system call in a bit more low-level fashion that glibc's
reboot() wrapper. The main difference is that the extra "arg" argument
is supported.
Ultimately this just replaces the syscall wrapper implementation we
currently have at three places in our codebase by a single one.
With this change this means that all our syscall() invocations are
neatly separated out in static inline system call wrappers in our header
functions.
We neglected to set error_message for errors which occur _after_ the
`finish` label. These fatal errors only happen in paths where `finish`
was reached successfully, i.e. error_message has not already been set
(and this analysis is simple enough that this need not cause too much
headaches. Also our new assignments to error_message come immediately
after execve() calls, which would have lost the error_message if it had
been set).
Also print a status message when we fail to exec init, otherwise the only
sign the user will see is `# ` :).
This addresses the lack of error messages pointed out in issue #6827.
Zbigniew Jędrzejewski-Szmek