From fc6c7fe9becdd70ae6b671c396f2ad2db0b71cd7 Mon Sep 17 00:00:00 2001 From: Hendrik Brueckner Date: Tue, 11 Mar 2014 18:41:09 +0100 Subject: [PATCH] getty: Start getty on 3270 terminals available on Linux on System z Add the first 3270 terminal device that is associated with the Linux preferred console to the list of virtualization consoles. This is required to automatically start a getty if the conmode=3270 kernel parameter is specified for Linux on z/VM instances. Note that a queued upstream patch also enable the 3270 terminal device if it is associated with the Linux preferred console. How To successfully start agetty on a 3270 terminal, a change in the agetty parameter order is required. Previously, agetty would started like this: /sbin/agetty --keep-baud 3270/tty1 115200,38400,9600 TERM The agetty program interprets the "3270/tty1" as baud rate and fails to start with the "bad speed: 3270/tty1" error message. Fixing this in agetty is more complex rather than reordering the command line parameters like this: /sbin/agetty --keep-baud 115200,38400,9600 3270/tty1 TERM According to agetty sources and "agetty --help", agetty accepts the "tty", "baudrate tty", and "tty baudrate" specifications. P.S. The "tty: Set correct tty name in 'active' sysfs attribute" introduces a change to display the terminal device which is associated with the Linux preferred console. This change helps to let systemd handle this particular case only. Without the changes of this commit, no additional 3270 terminal device can be managed by systemd. https://git.kernel.org/cgit/linux/kernel/git/gregkh/tty.git/commit/?id=723abd87f6e536f1353c8f64f621520bc29523a3 --- rules/99-systemd.rules.in | 2 +- src/getty-generator/getty-generator.c | 3 ++- units/serial-getty@.service.m4 | 2 +- 3 files changed, 4 insertions(+), 3 deletions(-) diff --git a/rules/99-systemd.rules.in b/rules/99-systemd.rules.in index 04a59c4..db72373 100644 --- a/rules/99-systemd.rules.in +++ b/rules/99-systemd.rules.in @@ -7,7 +7,7 @@ ACTION=="remove", GOTO="systemd_end" -SUBSYSTEM=="tty", KERNEL=="tty[a-zA-Z]*|hvc*|xvc*|hvsi*|ttysclp*|sclp_line*", TAG+="systemd" +SUBSYSTEM=="tty", KERNEL=="tty[a-zA-Z]*|hvc*|xvc*|hvsi*|ttysclp*|sclp_line*|3270/tty[0-9]*", TAG+="systemd" KERNEL=="vport*", TAG+="systemd" diff --git a/src/getty-generator/getty-generator.c b/src/getty-generator/getty-generator.c index 08b3b1e..6a4aa2c 100644 --- a/src/getty-generator/getty-generator.c +++ b/src/getty-generator/getty-generator.c @@ -124,7 +124,8 @@ int main(int argc, char *argv[]) { "xvc0\0" "hvsi0\0" "sclp_line0\0" - "ttysclp0\0"; + "ttysclp0\0" + "3270!tty1\0"; _cleanup_free_ char *active = NULL; const char *j; diff --git a/units/serial-getty@.service.m4 b/units/serial-getty@.service.m4 index e94cdb4..4ac51e7 100644 --- a/units/serial-getty@.service.m4 +++ b/units/serial-getty@.service.m4 @@ -22,7 +22,7 @@ Before=getty.target IgnoreOnIsolate=yes [Service] -ExecStart=-/sbin/agetty --keep-baud %I 115200,38400,9600 $TERM +ExecStart=-/sbin/agetty --keep-baud 115200,38400,9600 %I $TERM Type=idle Restart=always RestartSec=0 -- 2.7.4