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Fix #352: separate runlevel S from runlevel 0

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Due to an old design decision runlevel S was encoded internally as '0',
meaning it was the same as halt/poweroff.  If you want to run scripts at
system shutdown this was less then ideal since it meant your scripts
also ran at bootstrap.

This change is quite invasive.  It introduces INIT_LEVEL (10) as the
value for runlevel S, meaning all code that parses and/or evaluates
anything for runlevel 0/S was affected and had to be reworked.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg committed 2023-04-22 15:11:27 +02:00
1 parent 80191f2fd5
commit e00fda5dc3
12 files changed
+67 -47
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README.md
+16 -16
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@@ -244,7 +244,7 @@ networking here. The configured `runlevel NUM` from `/etc/finit.conf`
is what Finit changes to after bootstrap, unless 'single' (or 'S') is
given on the kernel cmdline, in which case runlevel 1 is started.
All services in runlevel S(0) are started first, followed by the desired
All services in runlevel S) are started first, followed by the desired
run-time runlevel. Run tasks in runlevel S can be started in sequence
by using `run [S] cmd`. Changing runlevels at runtime is done like any
other init, e.g. <kbd>init 4</kbd>, but also using the more advanced
@@ -585,24 +585,24 @@ scripting and documentation:
```
alpine:~# initctl -p
PID IDENT STATUS RUNLEVELS DESCRIPTION
PID IDENT STATUS RUNLEVELS DESCRIPTION
======================================================================
1506 acpid running [--2345----] ACPI daemon
1509 crond running [--2345----] Cron daemon
1489 dropbear running [--2345----] Dropbear SSH daemon
1511 klogd running [S12345----] Kernel log daemon
1512 ntpd running [--2345----] NTP daemon
1473 syslogd running [S12345----] Syslog daemon
1506 acpid running [---2345----] ACPI daemon
1509 crond running [---2345----] Cron daemon
1489 dropbear running [---2345----] Dropbear SSH daemon
1511 klogd running [S-12345----] Kernel log daemon
1512 ntpd running [---2345----] NTP daemon
1473 syslogd running [S-12345----] Syslog daemon
alpine:~# initctl -pv
PID IDENT STATUS RUNLEVELS COMMAND
PID IDENT STATUS RUNLEVELS COMMAND
======================================================================
1506 acpid running [--2345----] acpid -f
1509 crond running [--2345----] crond -f -S $CRON_OPTS
1489 dropbear running [--2345----] dropbear -R -F $DROPBEAR_OPTS
1511 klogd running [S12345----] klogd -n $KLOGD_OPTS
1512 ntpd running [--2345----] ntpd -n $NTPD_OPTS
1473 syslogd running [S12345----] syslogd -n
1506 acpid running [---2345----] acpid -f
1509 crond running [---2345----] crond -f -S $CRON_OPTS
1489 dropbear running [---2345----] dropbear -R -F $DROPBEAR_OPTS
1511 klogd running [S-12345----] klogd -n $KLOGD_OPTS
1512 ntpd running [---2345----] ntpd -n $NTPD_OPTS
1473 syslogd running [S-12345----] syslogd -n
```
The environment variables to each of the services above are read from,
@@ -627,7 +627,7 @@ Condition(s):
User : root
Group : root
Uptime : 2 hour 46 min 56 sec
Runlevels : [--2345----]
Runlevels : [---2345----]
Memory : 1.2M
CGroup : /system/dropbear cpu 0 [100, max] mem [--.--, max]
|- 1485 dropbear -R -F