From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?SsOpcsOpbXkgUk9TRU4=?= Date: Mon, 4 Nov 2019 18:08:46 +0100 Subject: [Buildroot] [PATCH 03/15] fix tty handling In-Reply-To: References: <20191103165640.21819-1-jeremy.rosen@smile.fr> <20191103165640.21819-4-jeremy.rosen@smile.fr> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net I submitted a different patch for upstream ( https://github.com/systemd/systemd/pull/13920) which was just accepted, so we will need to wait for v244 to use it I am not sure changing that in meson would be accepted upstream: * tty1 is the only default that makes sense and only embedded devices might not have a tty1 * the generic case of "static enable of a getty" is pretty complicated since it can be a tty, a serial-console or the kernel console. I think overriding the upstream-provided default is the best way to go. But that's a bit of a matter of taste... Le dim. 3 nov. 2019 ? 18:48, James Hilliard a ?crit : > On Sun, Nov 3, 2019 at 11:57 AM J?r?my Rosen > wrote: > > > > Handling of tty is a bit tricky, we need to aggressively disable what > > systemd does with tty1 then update for what buildroot wants to do > > > > Rework the whole tty generation to work with presets > > > > Signed-off-by: J?r?my Rosen > > --- > > ...e-default-instance-of-getty-.service.patch | 27 +++++++++++++++++++ > > package/systemd/80-buildroot.preset | 5 ++-- > > package/systemd/systemd.mk | 25 ++++++++++++----- > > 3 files changed, 48 insertions(+), 9 deletions(-) > > create mode 100644 > package/systemd/0002-remove-default-instance-of-getty-.service.patch > > > > diff --git > a/package/systemd/0002-remove-default-instance-of-getty-.service.patch > b/package/systemd/0002-remove-default-instance-of-getty-.service.patch > > new file mode 100644 > > index 0000000000..b412620cbd > > --- /dev/null > > +++ > b/package/systemd/0002-remove-default-instance-of-getty-.service.patch > > @@ -0,0 +1,27 @@ > > +From 77384f2f107ca99fef6a9c0b9d54a3f2147a0d18 Mon Sep 17 00:00:00 2001 > > +From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Rosen?= > > +Date: Thu, 31 Oct 2019 16:24:02 +0100 > > +Subject: [PATCH] remove default instance of getty at .service > > + > > +upstream assumes that tty1 is always a valid tty, this generally makes > > +sense but might not be the case for embedded devices. Having it as a > > +DefaultInstance makes it enabled by "systemctl preset-all" > > + > > +it is simpler for us to remove the DefaultInstance entirely and manually > > +link as needed > Can we make this suitable for inclusion in upstream systemd by making > the DefaultInstance > tty a meson config option instead? > > +--- > > + units/getty at .service.m4 | 1 - > > + 1 file changed, 1 deletion(-) > > + > > +diff --git a/units/getty at .service.m4 b/units/getty at .service.m4 > > +index 80e793bb73..7060457cb1 100644 > > +--- a/units/getty at .service.m4 > > ++++ b/units/getty at .service.m4 > > +@@ -57,4 +57,3 @@ UnsetEnvironment=LANG LANGUAGE LC_CTYPE LC_NUMERIC > LC_TIME LC_COLLATE LC_MONETAR > > + > > + [Install] > > + WantedBy=getty.target > > +-DefaultInstance=tty1 > > +-- > > +2.24.0.rc1 > > + > > diff --git a/package/systemd/80-buildroot.preset > b/package/systemd/80-buildroot.preset > > index 4074901cbd..5dbae39173 100644 > > --- a/package/systemd/80-buildroot.preset > > +++ b/package/systemd/80-buildroot.preset > > @@ -1,5 +1,4 @@ > > # Higher priority than systemd presets > > > > -# by default systemd enables a getty on tty1 > > -# we don't want that because tty1 may not exist > > -disable getty at .service > > +# This file is currently empty, but is available for demonstration and > future use > > + > > diff --git a/package/systemd/systemd.mk b/package/systemd/systemd.mk > > index d4680cd225..ed039de82b 100644 > > --- a/package/systemd/systemd.mk > > +++ b/package/systemd/systemd.mk > > @@ -428,22 +428,35 @@ ifneq ($(call > qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT)),) > > # systemd needs getty.service for VTs and serial-getty.service for > serial ttys > > # note that console-getty.service should be used on /dev/console as it > should not have dependencies > > # also patch the file to use the correct baud-rate, the default > baudrate is 115200 so look for that > > +# > > +# systemd defaults to only have getty at tty.service enabled > > +# * DefaultInstance=tty1 in getty at service > > +# * no DefaultInstance in serial-getty at .service > > +# * WantedBy=getty.target in console-getty.service > > +# * console-getty is not enabled because of 90-systemd.preset > > +# We want "systemctl preset-all" to do the right thing, even when run > on the target after boot > > +# * remove the default instance of getty at .service via a patch on > systemd source > > +# drop-ins cannot override DefaultInstance with an empty string > > +# * set a new DefaultInstance for getty at .service, if needed > > +# * set a new DefaultInstance for serial-getty at .service, if needed > > +# * override the systemd-provided preset for console-getty.service if > needed > > define SYSTEMD_INSTALL_SERVICE_TTY > > if [ $(BR2_TARGET_GENERIC_GETTY_PORT) = "console" ]; \ > > then \ > > TARGET="console-getty.service"; \ > > - LINK_NAME="console-getty.service"; \ > > + echo enable console-getty.service > > $(TARGET_DIR)/usr/lib/systemd/system-preset/81-buildroot-tty.preset;\ > > elif echo $(BR2_TARGET_GENERIC_GETTY_PORT) | egrep -q > 'tty[0-9]*$$'; \ > > then \ > > TARGET="getty at .service"; \ > > - LINK_NAME="getty@$(call > qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT)).service"; \ > > + mkdir $(TARGET_DIR)/usr/lib/systemd/system/getty@ > .service.d;\ > > + echo [Install] > > $(TARGET_DIR)/usr/lib/systemd/system/getty@ > .service.d/buildroot-console.conf;\ > > + echo DefaultInstance=$(call > qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT)) >> > $(TARGET_DIR)/usr/lib/systemd/system/getty@ > .service.d/buildroot-console.conf;\ > > else \ > > TARGET="serial-getty at .service"; \ > > - LINK_NAME="serial-getty@$(call > qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT)).service"; \ > > + mkdir $(TARGET_DIR)/usr/lib/systemd/system/serial-getty@ > .service.d;\ > > + echo [Install] > > $(TARGET_DIR)/usr/lib/systemd/system/serial-getty@ > .service.d/buildroot-console.conf;\ > > + echo DefaultInstance=$(call > qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT)) >> > $(TARGET_DIR)/usr/lib/systemd/system/serial-getty@ > .service.d/buildroot-console.conf;\ > > fi; \ > > - mkdir -p $(TARGET_DIR)/etc/systemd/system/getty.target.wants/; \ > > - ln -fs ../../../../lib/systemd/system/$${TARGET} \ > > - > $(TARGET_DIR)/etc/systemd/system/getty.target.wants/$${LINK_NAME}; \ > > if [ $(call qstrip,$(BR2_TARGET_GENERIC_GETTY_BAUDRATE)) -gt 0 ] > ; \ > > then \ > > $(SED) 's,115200,$(BR2_TARGET_GENERIC_GETTY_BAUDRATE),' > $(TARGET_DIR)/lib/systemd/system/$${TARGET}; \ > > -- > > 2.24.0.rc1 > > > > _______________________________________________ > > buildroot mailing list > > buildroot at busybox.net > > http://lists.busybox.net/mailman/listinfo/buildroot > -- [image: SMILE] 20 rue des Jardins 92600 Asni?res-sur-Seine *J?r?my ROSEN* Architecte technique [image: email] jeremy.rosen at smile.fr [image: phone] +33 6 88 25 87 42 [image: url] http://www.smile.eu [image: Twitter] [image: Facebook] [image: LinkedIn] [image: Github] [image: D?couvrez l?univers Smile, rendez-vous sur smile.eu] -------------- next part -------------- An HTML attachment was scrubbed... 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