This patch adds support for restarting the API socket on SIGHUP, similar
to how SysV init and systemd use SIGUSR1 to restart their FIFO or D-Bus.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
An interface may come up with IFF_RUNNING already set, but we would
only detect IFF_UP. This patch simplfies the code a lot by pivoting
the qualifier from using ifi_change to ifi_flags, which is the actual
current status of an interface.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This is a quite intrusive change. In addition to the already reserved
runlevels 0 and 6, halt and reboot, respectively, this patch reserves
runlevel 1 as *no networking*, like the traditional SysV init did. One
of the reasons for this change is the new 'single' user mode, introduced
earlier. Most users when entering 'S' or 'single' on the kernel cmdline
expect the single user mode (runlevel 1) to be without networking.
This leaves 2, 3, 4, 5, and 7, 8, 9 as fully user-configurable runlevels
with networking.
Of course, networking can still be enabled in runlevel 1 using ifconfig
or ifupdown, or change runlevel.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
If hostname is missing from /lib/finit/rescue.conf the system will
default to the configured default hostname (noname).
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This patch adds a rescue (revovery) mode to Finit. Simply add `rescue`
to the kernel cmdline at boot and the following steps at bootstrap will
be skipped:
- Load of services/run/task/etc in /etc/finit.conf + /etc/finit.d/*.conf
- fsck of filesystems in /etc/fstab
- Remount of / to read-write
- Mount of all filesystems in /etc/fstab
- swapon
- A few plugin hooks:
- HOOK_ROOTFS_UP
- HOOK_MOUNT_ERROR
- HOOK_BASEFS_UP
- `runparts DIR`
- /etc/rc.local
Instead of loading /etc/finit.conf and /etc/finit.d/*.conf Finit loads
the file /lib/finit/rescue.conf, which can be overridden by the operator
if needed. If this file is removed (or lost), Finit falls back to start
a simple root shell, without any login.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
The /lib/finit/plugins path is as of this patch not longer possible to
change. Use --prefix or --libdir instead to change the leading path.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Finit v3.1 adds support for reloading /etc/finit.conf, document what
actually is read at runtime, compared to at bootstrap, and clarify
which stanzas are for what part of the boot process.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
The difference between `runparts DIR` and `/etc/rc.local` is that one
should run just before the first runlevel change (to the configured
runlevel) at the end of bootstrap, whereas the other should run just
before launcing the TTYs, i.e. after all tasks in the configured
runlevel have been started.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This patch is an optimization. Now that we monitor for any .conf file
changes (as soon as the event loop starts) we can skip automatic reload
of all .conf files and services if no .conf file has changed. Unless
the user issues an `initctl reload`, `init q`, or sends us SIGHUP.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
As reported in #92, systems with an udevd very early register a service
using global_rlimit[]. The change was introduced in b68c5c1 but did
not take the ordering problem into consideration, global_rlimit[] was
left uninitialized, which likely led to severely limited udevd that
was continously crashing.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
- Validate function argument
- Skip¹ shutdown() when closing a TCP socket, not needed
___
¹ also, shutdown() segfaults a late shutdown/reboot
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
On shutdown/reboot, send SIGPR as a heads-up to watchdogd that the
system is going down. All file systems are about to be unmounted.
It's just about the last process left running in the system, so we
give it two seconds to complete its work before we continue.
When everything has been unmounted and we're ready to call reboot(),
we send SIGTERM to the registered watchdog, to give ti the chance to
let the WDT reset the system.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
When Finit enters shutdown/reboot we need to advise any watchdogd that
we are going down *before* we unmount any file systems. This to let
the user save any state, e.g. reboot counters, to disk. Right before
we call reboot() in Finit we send SIGTERM to the watchdogd to give it
the chance to use the WDT to reboot the system.
The WDT cricuitry on embedded systems is often connected to the RESETn
logic of all relevant board compoents, whereas reboot() only reboots the
SoC with the CPU. Hence, a WDT reboot is more efficient and more like a
regular power cycle, which users of embedded systems often want.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This patch makes it possible to control the default redirection of
(misbehaving) services output to /dev/null. With this disabled,
a service may write to its stdout/stderr and mess up the console.
By default all service/run/tasks stdout/stderr is redirected.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This patch adds a `nologin` flag to the `tty` configuration directive,
making it possible to set up really simple embedded systems with no
login.
Example, put the following line in `/etc/finit.d/getty.conf` to get
a "Please press Enter to ..." prompt before being presented with a
root shell prompt.
tty [12345] @console noclear nologin
Needless to say, this is not very secure, but can be really useful
for developer setups, during board bringup, or similar.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
In f3669c7 the difference between static and dynamic services was
removed. This led to a regression in handling internally created
services for, e.g., dbus-daemon and udevd, mentioned in issue #90.
This patch introduces a "protected" flag for svc_t to prevent the
mark-and-sweep handling of regularly loaded services.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
The new condition triggered hooks requrie /var/run/finit/cond to
be set up before calling the first user-configurable hooks.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
- Add newline to cond generation ID, like PID files, easier when
debugging. Does not affect fscanf() in cond_get_gen()
- Update copyright years
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Until now Finit has used mtime to determine if a file has been changed,
or simply touched to request reload, when `initctl reload` is called.
Using mtime for this purpose is a monumentally bad idea since time can
be changed at any point: a user may adjust the time, NTP continously
tunes the clock, and time stamps are stored as the walltime. So if we
compare timestamps against the last time we (booted or) did reload, we
would miss .conf file changes.
This patch replaces the mtime mistake with an inotify watcher for the
following files: /etc/finit.d/*.conf, /etc/finit.d/available/*.conf,
and /etc/finit.conf. All file changes between (bootstraps and) calls
to `initctl reload` are tracked, like the mtime backend it replaces.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
The following configuration directives, previously only allowed
in /etc/finit.conf, are now also only allowed in runlevel S, i.e.
at bootstrap:
- host
- mknod
- network
- runparts
- runlevel
This change is in preparation for allowing reload of finit.conf
as well as /etc/finit.d/*.conf, which we already support.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This is a prelude to a major behavioral change. The difference between
a static and dynamic service will be removed in Finit v3.1. This means
all .conf files, including /etc/finit.conf, will be re-read on reload.
However, not all configuration directives will be re-read, some will
only be applicable at bootstrap, i.e. runlevel S.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This patch moves the networking bit to the latter part of bootstrap,
called finalize(), in favor of starting the event loop earlier.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This change removes a long standing kernel requirement and architectural
mishap in the design of Finit v1. It is no longer necessary to include
CONFIG_SYSVIPC in the kernel to use Finit and its command line tool
initctl. It is also no longer possible to connect to the internals of
PID 1 using shmat(), the initctl tool has already been updated to use
the domain socket API.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This change is one of the required intermediate steps to remove the
shared memory store for all svc_t, this in turn to avoid any external
programs manipulating the internal memory of PID 1.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
For ease of use, allow short forms of commands, like:
initctl h
initctl c d
initctl l
Also, default to show conditions if no argument to cond is given.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
We need the name client.c for the client side of api.c, so let's rename
the client to its traditional name.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Joachim Nilsson