package/openrc: drop custom getty service

In Buildroot getty is provided by BusyBox or util-linux (agetty). Both
create a /sbin/getty symlink pointing to the actual program, so make the
agetty service use that path instead of /sbin/agetty.

Also start agetty after all other services, to prevent mixing startup
messages with the getty prompt on devices with a single serial console,
as the custom unit we're dopping was doing already.

This allows us to drop the custom getty service, which causes an error
message from openrc 0.42.1 (in a forthcoming patch):

    Error: getty is the name of a real and virtual service.

The patches are required because it's not possible to override the
command or startup order by means of a configuration file. Anyway it's
still better to patch something maintained upstream than depending on a
custom piece that may easily become obsolete.

Signed-off-by: Carlos Santos <unixmania@gmail.com>
[yann.morin.1998@free.fr:
  - expand commit log to explain why we ve 'after *' in the same patch
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/openrc/0003-init.d-agetty-replace-sbin-agetty-by-sbin-getty.patch

@@ -0,0 +1,33 @@
+From b39ab180358ed451eae9df900f49a72ef1eb7442 Mon Sep 17 00:00:00 2001
+From: Carlos Santos <unixmania@gmail.com>
+Date: Sun, 1 Mar 2020 09:04:48 -0300
+Subject: [PATCH] init.d/agetty: replace /sbin/agetty by /sbin/getty
+
+In Buildroot getty is provided by BusyBox or util-linux (agetty). Both
+create a /sbin/getty symlink pointing to the actual program, so make the
+agetty service use that path instead of /sbin/agetty.
+
+The patch is required because it's not possible to override the command
+by means of a configuration file.
+
+Signed-off-by: Carlos Santos <unixmania@gmail.com>
+---
+ init.d/agetty.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/init.d/agetty.in b/init.d/agetty.in
+index e4866f7a..e1864628 100644
+--- a/init.d/agetty.in
++++ b/init.d/agetty.in
+@@ -14,7 +14,7 @@ supervisor=supervise-daemon
+ port="${RC_SVCNAME#*.}"
+ respawn_period="${respawn_period:-60}"
+ term_type="${term_type:-linux}"
+-command=/sbin/agetty
++command=/sbin/getty
+ command_args_foreground="${agetty_options} ${port} ${baud} ${term_type}"
+ pidfile="/run/${RC_SVCNAME}.pid"
+ 
+-- 
+2.18.2
+

package/openrc/0004-init.d-agetty-start-agetty-after-all-sevices.patch

@@ -0,0 +1,29 @@
+From c2dc04f6b8c6784941b896e0b17c160dd43a566f Mon Sep 17 00:00:00 2001
+From: Carlos Santos <unixmania@gmail.com>
+Date: Sun, 1 Mar 2020 11:14:37 -0300
+Subject: [PATCH] init.d/agetty: start agetty after all services
+
+This is required for Buildroot, to prevent mixing service initialization
+messages with the getty prompt on devices with a single serial console.
+
+Signed-off-by: Carlos Santos <unixmania@gmail.com>
+---
+ init.d/agetty.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/init.d/agetty.in b/init.d/agetty.in
+index e1864628..a1ad4e9f 100644
+--- a/init.d/agetty.in
++++ b/init.d/agetty.in
+@@ -19,7 +19,7 @@ command_args_foreground="${agetty_options} ${port} ${baud} ${term_type}"
+ pidfile="/run/${RC_SVCNAME}.pid"
+ 
+ depend() {
+-	after local
++	after *
+ 	keyword -prefix
+ 	provide getty
+ }
+-- 
+2.18.2
+

package/openrc/getty

@@ -1,24 +0,0 @@
-#!/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}"
-}

package/openrc/openrc.mk

@@ -68,17 +68,15 @@ endef
 OPENRC_TARGET_FINALIZE_HOOKS += OPENRC_REMOVE_UNNEEDED
 
 ifeq ($(BR2_TARGET_GENERIC_GETTY),y)
-OPENRC_GETTY_SVCNAME = getty.$(SYSTEM_GETTY_PORT)
+OPENRC_GETTY_SVCNAME = agetty.$(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)\""; \
+		echo "agetty_options=\"-L $(SYSTEM_GETTY_OPTIONS)\""; \
 	} > $(OPENRC_GETTY_CONF_D)
-	$(INSTALL) -D -m 0755 $(OPENRC_PKGDIR)/getty \
+	ln -sf agetty $(TARGET_DIR)/etc/init.d/$(OPENRC_GETTY_SVCNAME)
-		$(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