Calling `initctl debug` is supposed to toggle Finit debug messages on
the boot console. This broke in ae09272b when improving support for
running Finit in containers.
Part of this change is a slight refactor of who calles log_init() when
starting up, and when to call ttinit(). We now call ttinit() every time
we toggle debug.
Also, toggling back to normal logging had a bug. The new default log
level for Finit is LOG_INFO, but toggling back set it to LOG_NOTICE.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Usability.
Remains backwards compatible for now, but finit.show_status is as of 4.3
deprecated. Likely to be removed int 5.0
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Explicitly set arg to non-NULL value. The call to conf() later will
steer up the value to point to the full path of the user's finit.conf
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
When we added support for using popen() to run(), to log the output, we
forgot to update the error handling path. Found by Coverity Scan.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
We don't want repeats of issue #236, so let's start by tracking down any
bugs hidden in logging functions.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
On regular desktop systems, like Debian, the dbus-daemon forks off a
dbus-launch process to start up things like your desktop for you. This
process is not known to Finit and lingers in the background since it's
been reparented to init, and to top things off it seems to ignore any
SIGTERMs send to it.
Obviously this makes a shutdown on such systems very noisy, so this
patch changes the print() to a _d() so anyone debugging a system can see
it with `-- finit.debug` on the kernel command line, or `initctl debug`.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This split unmount is a bit crude, unfortunately. A user may have set
up a bind or overlayfs mount on top of a tmpfs -- so unmounting tmpfs
first will then always result in EBUSY.
Avoid logging busy errors and fake OK. We'll catch it later in the
second stage unmount.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Turns out that on Debian `ifdown -a` can block for quite a while at
shutdown/reboot. So we'd like to use the --force option. However,
the BusyBox ifdown tool doesn't support --force, only -f, which in
turn the regular ifdown tool doesn't support.
Regardless, we can allow network shutdown to run in the background
like bring-up, at reboot we want to reboot quickly and don't care
so much, and on runlevel change to single-user mode we can allow
for some lagging behind in the background.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Useful to debug system events after the system has started up and you
don't want to rebuild Finit to add the `-d` command line flag.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
A forking service, e.g. a SysV init script, that returns is no longer
running, even though the monitored service may still be starting. We
must mark the svc->pid as terminated until we know more -- otherwise
we may stall on a shutdown at that exact point.
Also, when shutting down, and stopping all services, ensure we do not
start the carousel for non-existing PIDs. This might also cause our
stalling at shutdown.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
- Add `type:forking` service option to trigger guessing pidfile to
watch for, instead of `pid:!foo` option, which is not intuitive.
This option may likely also survive into the new file format :)
- Update docs and add examples
- Update start-stop-serv.sh test case with this new variant
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Before this fix, a service declared with respawn could not be changed at
runtime to remove the respawn flag.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Calling sync is not needed, remount does this for us.
Remount with 'dummydev' causes warnings and is not needed. It appears
sysvinit used this to try and fix a sparc related bug. Instead, use the
rootfs keyword to ensure we don't accidentally remount a bind mounted /.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
No point waiting for SysV start/stop scripts to finish, PID 1 should not
risk getting blocked forever by broken scripts. Instead we fork them off
and forget about them until they terminate. If they are buggy and don't
finish, it's the problem of the admin.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
When a SysV init script starts a daemon, Finit knows nothing of the PID
it should monitor. The PID is written, by start-stop-daemon or the
daemon itself, to the PID file. Finit monitors for new PID files and
can match the PID in such files with an svc_t.
For the regular use-case, we prefer first looking up the matching svc_t
based on the PID -- assuming we start and monitor the service. As a
fallback we resort to mathching the svc_t's declared PID file with the
new file we just discovered.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
We want to find the PID of the daemon the init script starts, so we need
a way to declare this to Finit.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
SysV init scripts should not go to "done" state but "halted" so we can
do: `initctl stop foo; initctl start foo`, like we do for our regular
monitored services.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
When running in a container we still want to use any syslog daemon
available for our logging needs. However, the time between the first
logit() in Finit and any such daemon having started can be long. In a
normal (non-containerized) setup we log to the kernel ring buffer, but
that's not available in a container scenario. At least not for
unprivileged containers. So we need to detect all these cases and be
prepared to fall back to log to the console, either using these LOG_CONS
flag to openlog(), or by simply calling vfprintf() to stderr.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This trick can also be used by others who want to run Finit in an
unshare. Set the container environment variable to 'unshare',
like lxc and docker do for their products.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Turns out the kill(2) syscall returns ENOENT, not ESRCH, in our test
suite. Don't know why, the man page never mentions ENOENT, only the
ESRCH code. Let's check for both, either way ithe PID is not there.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
A service may have unexpectedly died, and we never got the signal, so
when stopping services we must set the new state after we've tried to
stop the service. Otherwise the svc_set_state() function starts a
background timer for the SIGKILL job, which may block a reboot.
The kill() syscall tells us if the service was there or not, if not we
must clean up and go to HALTED state.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
At startup (and reconf) of systems with lots of services there is a risk
of losing inotify events, e.g., PID file creation/delete events. This
patch increase the receive buffer (doubles it).
On Linux the getsockopt() for SO_RCVBUF returns double the set size, due
to housekeeping in the kernel. So we don't have to do any adjustments
when setting it.
Issue #226
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
In some (error) cases the PID known to Finit may no longer exist, or may
not have been added to a cgroup (yet). Handle this case by skipping the
output of cgroup info in such conditions.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Joachim Wiberg