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package/openrc: add support for spawning getty

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We install a template getty service, and we 'instantiate' it in the
default runlevel, using the configured tty.

Ideally, packages that provide a getty program would be responsible
for installing the corresponding service file. However, to keep
consistency with the existing init systems (busybox, systemd, and
sysv), so we do provide it from the openrc package itself.

OpenRC only acts on the files in a runlevel sub-directory, but the
documentation [0] actually suggests that the instance symlink be done
in init.d, and then again symlinked into the actual runlevel
sub-directory. So, we abide by the rules.

Also, to be noted, the getty service file is installed without ensuring
that a getty command is available. This again is not unlike other init
systems, sysvinit and busybox, which behave the same.

[0] https://wiki.gentoo.org/wiki/OpenRC

Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>
[yann.morin.1998@free.fr:
  - move getty template to openrc package  (Thomas)
  - fix namespace of the vaiables (Thomas)
  - simplify creation of the defaults file
  - rewrite commit log
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Michał Łyszczek 2019-08-04 14:14:17 +02:00 committed by Thomas Petazzoni
parent af8c7b41f5
commit 4019559de0
5 changed files with 46 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
package/openrc/getty Executable file
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@ -0,0 +1,24 @@
#!/sbin/openrc-run
# based on agetty service from OpenRC package
description="start getty on terminal"
supervisor=supervise-daemon
port="${RC_SVCNAME#*.}"
term_type="${term_type:-linux}"
command=/sbin/getty
command_args_foreground="${getty_options} ${baud} ${port} ${term_type}"
pidfile="/run/${RC_SVCNAME}.pid"
depend() {
# start getty at the very end of init
after *
keyword -prefix
}
start_pre() {
export EINFO_QUIET="${quiet:-yes}"
}
stop_pre() {
export EINFO_QUIET="${quiet:-yes}"
}

18
package/openrc/openrc.mk
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@ -42,4 +42,22 @@ define OPENRC_REMOVE_UNNEEDED
endef
OPENRC_TARGET_FINALIZE_HOOKS += OPENRC_REMOVE_UNNEEDED
ifeq ($(BR2_TARGET_GENERIC_GETTY),y)
OPENRC_GETTY_SVCNAME = getty.$(SYSTEM_GETTY_PORT)
OPENRC_GETTY_CONF_D = $(TARGET_DIR)/etc/conf.d/$(OPENRC_GETTY_SVCNAME)
define OPENRC_SET_GETTY
{ \
echo "baud=\"$(SYSTEM_GETTY_BAUDRATE)\""; \
echo "term_type=\"$(SYSTEM_GETTY_TERM)\"" ; \
echo "getty_options=\"-L $(SYSTEM_GETTY_OPTIONS)\""; \
} > $(OPENRC_GETTY_CONF_D)
$(INSTALL) -D -m 0755 $(OPENRC_PKGDIR)/getty \
$(TARGET_DIR)/etc/init.d/getty
ln -sf getty $(TARGET_DIR)/etc/init.d/$(OPENRC_GETTY_SVCNAME)
ln -sf /etc/init.d/$(OPENRC_GETTY_SVCNAME) \
$(TARGET_DIR)/etc/runlevels/default/$(OPENRC_GETTY_SVCNAME)
endef
OPENRC_TARGET_FINALIZE_HOOKS += OPENRC_SET_GETTY
endif # BR2_TARGET_GENERIC_GETTY
$(eval $(generic-package))

0
package/skeleton-init-openrc/skeleton/etc/conf.d/.empty Normal file
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0
package/skeleton-init-openrc/skeleton/etc/runlevels/default/.empty Normal file
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8
system/Config.in
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@ -348,16 +348,16 @@ config BR2_TARGET_GENERIC_GETTY_BAUDRATE
config BR2_TARGET_GENERIC_GETTY_TERM
string "TERM environment variable"
default "vt100"
# currently observed only by busybox and sysvinit
depends on BR2_INIT_BUSYBOX || BR2_INIT_SYSV
# currently observed by all but systemd
depends on !BR2_INIT_SYSTEMD
help
Specify a TERM type.
config BR2_TARGET_GENERIC_GETTY_OPTIONS
string "other options to pass to getty"
default ""
# currently observed only by busybox and sysvinit
depends on BR2_INIT_BUSYBOX || BR2_INIT_SYSV
# currently observed by all but systemd
depends on !BR2_INIT_SYSTEMD
help
Any other flags you want to pass to getty,
Refer to getty --help for details.