15337 2024-01-06 15:05:34 +0000 SERIAL_CONSOLES_CHECK removed, but behavior changed 2026-03-26 15:19:00 +0000 1 1 7 Build System, Metadata & Runtime OE-Core core 4.3 x86 Multiple NEW Medium+ normal 6.1 M1 1 pokylinux ross.burton ccasciato meta.mr.watcher meta.watcher pokylinux randy.macleod --- --- Yes (doc changes required) oldest_to_newest 97752 0 pokylinux 2024-01-06 15:05:34 +0000 The doc says[1]: "SERIAL_CONSOLES_CHECK - no longer necessary because all consoles listed in SERIAL_CONSOLES are checked for their existence before a getty is started." [1]https://docs.yoctoproject.org/dev/singleindex.html#removed-variables I do have the following in my machine configuration for a rootfs, which up to now was able to run on different boards with different serial consoles. SERIAL_CONSOLES ?= "115200;ttyPS0 115200;ttyO0 115200;ttymxc1 115200;ttymxc0 115200;ttyS0 115200;ttyS2 115200;ttySTM0" apparently those are not available on a single board, but ... with the new version the rootfs created includes a /etc/inittab which contains this: # Normally not reached, but fallthrough in case of emergency. z6:6:respawn:/sbin/sulogin PS0:12345:respawn:/usr/sbin/ttyrun ttyPS0 /sbin/getty 115200 ttyPS0 vt102 O0:12345:respawn:/usr/sbin/ttyrun ttyO0 /sbin/getty 115200 ttyO0 vt102 mxc1:12345:respawn:/usr/sbin/ttyrun ttymxc1 /sbin/getty 115200 ttymxc1 vt102 mxc0:12345:respawn:/usr/sbin/ttyrun ttymxc0 /sbin/getty 115200 ttymxc0 vt102 S0:12345:respawn:/usr/sbin/ttyrun ttyS0 /sbin/getty 115200 ttyS0 vt102 S2:12345:respawn:/usr/sbin/ttyrun ttyS2 /sbin/getty 115200 ttyS2 vt102 STM0:12345:respawn:/usr/sbin/ttyrun ttySTM0 /sbin/getty 115200 ttySTM0 vt102 Which is wrong, I would say, and leads e.g. to: INIT: Id "S0" respawning too fast: disabled for 5 minutes INIT: Id "S2" respawning too fast: disabled for 5 minutes root@multi-v7-ml:~# ls -lah /dev/ttyS* crw-rw---- 1 root dialout 4, 64 Jan 1 2000 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Jan 1 2000 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Jan 1 2000 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Jan 1 2000 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 Jan 1 2000 /dev/ttyS4 root@multi-v7-ml:~# ls -lah /dev/ttymxc* crw------- 1 root tty 207, 17 Jan 6 15:01 /dev/ttymxc1 crw-rw---- 1 root dialout 207, 18 Jan 1 2000 /dev/ttymxc2 root@multi-v7-ml:~# In older versions, with SERIAL_CONSOLES_CHECK present and sysvinit on first boot consoles listed in SERIAL_CONSOLES were checked for their existence and only those present were added to /etc/inittab. In older versions the inittab entry looked like this: # Normally not reached, but fallthrough in case of emergency. z6:6:respawn:/sbin/sulogin mxc1:12345:respawn:/sbin/getty 115200 ttymxc1 vt102 root@multi-v7-ml:~# ls -lah /dev/ttyS* crw-rw---- 1 root dialout 4, 64 Dec 8 18:44 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Dec 8 18:44 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Dec 8 18:44 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Dec 8 18:44 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 Dec 8 18:44 /dev/ttyS4 root@multi-v7-ml:~# ls -lah /dev/ttymxc* crw------- 1 root tty 207, 17 Jan 6 15:03 /dev/ttymxc1 crw-rw---- 1 root dialout 207, 18 Dec 8 18:44 /dev/ttymxc2 root@multi-v7-ml:~# Not sure what is supposed to happen now. 97753 1 pokylinux 2024-01-06 19:21:49 +0000 Looking a bit further into it, it looks like ttyrun does not quite do it's job or at least behaves differently compared to the old behavior. SUMMARY = "Start the program if the specified terminal device is available." DESCRIPTION = "ttyrun is typically used to prevent a respawn through the \ init(8) program when a terminal is not available." HOMEPAGE = "https://github.com/ibm-s390-linux/s390-tools" ----- What ttyrun does is just to see if it can open the device, which means if /dev/xxx is available and it can open it, it's fine. With the old method also a check was made against /proc/consoles root@multi-v7-ml:~# cat /proc/consoles ttymxc1 -W- (EC p ) 207:17 I guess this is what broke it. Currently I am doing a build with the old approach, but probably something like this would be enough: +pkg_postinst:${PN} () { +# run this on host and on target +if [ "${SERIAL_CONSOLES_CHECK}" = "" ]; then + exit 0 +fi +} + +pkg_postinst_ontarget:${PN} () { +# run this on the target +if [ -e /proc/consoles ]; then + tmp="${SERIAL_CONSOLES_CHECK}" + for i in $tmp + do + j=`echo ${i} | sed -e s/^.*\;//g -e s/\:.*//g` + k=`echo ${i} | sed s/^.*\://g` + if [ -z "`grep ${j} /proc/consoles`" ]; then + if [ -z "${k}" ] || [ -z "`grep ${k} /proc/consoles`" ] || [ ! -e /dev/${j} ]; then + sed -i -e /^.*${j}\ /d -e /^.*${j}$/d /etc/inittab + fi + fi + done + kill -HUP 1 +else + exit 1 +fi +} + 97754 2 pokylinux 2024-01-06 20:05:45 +0000 If I replace meta/recipes-core/sysvinit/sysvinit-inittab_2.88dsf.bb with the previous version all seems to work as expected. I also replaced meta/recipes-core/busybox/busybox-inittab_1.36.1.bb, but this does not matter for my current use case. ... Configuring packages on first boot.... (This may take several minutes. Please do not power off the machine.) update-rc.d: /etc/init.d/run-postinsts exists during rc.d purge (continuing) Removing any system startup links for run-postinsts ... /etc/rcS.d/S99run-postinsts ... Now it /etc/inittab looks like this: # Normally not reached, but fallthrough in case of emergency. z6:6:respawn:/sbin/sulogin mxc1:12345:respawn:/sbin/getty 115200 ttymxc1 vt102 97755 3 5001 pokylinux 2024-01-07 01:10:39 +0000 Created attachment 5001 reintroduce SERIAL_CONSOLES_CHECK in order to restore the "old behavior" with SERIAL_CONSOLES_CHECK this patches reintroduce SERIAL_CONSOLES_CHECK in combination with ttyrun 97756 4 5002 pokylinux 2024-01-07 01:12:47 +0000 Created attachment 5002 reintroduce SERIAL_CONSOLES_CHECK inittab in order to restore the "old behavior" with SERIAL_CONSOLES_CHECK this patches reintroduce SERIAL_CONSOLES_CHECK in combination with ttyrun 97780 5 ross.burton 2024-01-11 16:57:34 +0000 First comment: we (I) removed SERIAL_CONSOLES_CHECK because it alters the rootfs on first boot, which means it's impossible to use machines that use it with a read-only rootfs (as you can't edit it on boot) or any form of package management on /etc/inittab (as an upgrade of base-files would delete the changes). 97782 6 pokylinux 2024-01-11 18:52:38 +0000 @Ross: Yes I am aware of the behavior with a read only rootfs as documented here: https://bugzilla.yoctoproject.org/show_bug.cgi?id=13921 My problem is, the change in behavior. Before it was possible with a read only rootfs just not to use it. Now with a read/write rootfs consoles are just recognized as such when it's possible to open them even if they are not in /proc/consoles. With a read only rootfs plus overlayfs it might work. 97783 7 ross.burton 2024-01-12 18:29:37 +0000 > Now with a read/write rootfs consoles are just recognized as such when it's > possible to open them even if they are not in /proc/consoles. Sounds like the solution is to add a /proc/consoles check to ttyrun? 97786 8 pokylinux 2024-01-13 09:51:22 +0000 ... also it would be interesting to investigate what happens with systemd. Some checks are done on every boot, but I did not investigate it further with the latest version. 5001 2024-01-07 01:10:39 +0000 2024-01-07 01:10:39 +0000 reintroduce SERIAL_CONSOLES_CHECK 0031-busybox-add-SERIAL_CONSOLES_CHECK.patch text/plain 1613 pokylinux RnJvbSBhOTIzZTJjNTRmN2Q2MzQ5ZmI4ODVlMzQzMjU4ODk1ZmU0MjIwZjYzIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBSb2JlcnQgQmVyZ2VyIDxSb2JlcnQuQmVyZ2VyQFJlbGlhYmxl RW1iZWRkZWRTeXN0ZW1zLmNvbT4KRGF0ZTogU2F0LCA2IEphbiAyMDI0IDE4OjMyOjUzICswMDAw ClN1YmplY3Q6IFtQQVRDSF0gYnVzeWJveDogYWRkIFNFUklBTF9DT05TT0xFU19DSEVDSwoKU2ln bmVkLW9mZi1ieTogUm9iZXJ0IEJlcmdlciA8Um9iZXJ0LkJlcmdlckBSZWxpYWJsZUVtYmVkZGVk U3lzdGVtcy5jb20+Ci0tLQogLi4uL2J1c3lib3gvYnVzeWJveC1pbml0dGFiXzEuMzYuMS5iYiAg ICAgICAgIHwgNDYgKysrKysrKysrKysrKystLS0tLQogMSBmaWxlIGNoYW5nZWQsIDM0IGluc2Vy dGlvbnMoKyksIDEyIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL21ldGEvcmVjaXBlcy1jb3Jl L2J1c3lib3gvYnVzeWJveC1pbml0dGFiXzEuMzYuMS5iYiBiL21ldGEvcmVjaXBlcy1jb3JlL2J1 c3lib3gvYnVzeWJveC1pbml0dGFiXzEuMzYuMS5iYgppbmRleCA4ZWU4OGI2YWVmLi5lYzY2OTUy NzM2IDEwMDY0NAotLS0gYS9tZXRhL3JlY2lwZXMtY29yZS9idXN5Ym94L2J1c3lib3gtaW5pdHRh Yl8xLjM2LjEuYmIKKysrIGIvbWV0YS9yZWNpcGVzLWNvcmUvYnVzeWJveC9idXN5Ym94LWluaXR0 YWJfMS4zNi4xLmJiCkBAIC00OCw2ICs0OCwzMiBAQCBFT0YKIAogfQogCitwa2dfcG9zdGluc3Q6 JHtQTn0gKCkgeworIyBydW4gdGhpcyBvbiBob3N0IGFuZCBvbiB0YXJnZXQKK2lmIFsgIiR7U0VS SUFMX0NPTlNPTEVTX0NIRUNLfSIgPSAiIiBdOyB0aGVuCisgICAgICAgZXhpdCAwCitmaQorfQor Citwa2dfcG9zdGluc3Rfb250YXJnZXQ6JHtQTn0gKCkgeworIyBydW4gdGhpcyBvbiB0aGUgdGFy Z2V0CitpZiBbIC1lIC9wcm9jL2NvbnNvbGVzIF07IHRoZW4KKyAgICAgICAgdG1wPSIke1NFUklB TF9DT05TT0xFU19DSEVDS30iCisgICAgICAgIGZvciBpIGluICR0bXAKKyAgICAgICAgZG8KKyAg ICAgICAgICAgICAgICBqPWBlY2hvICR7aX0gfCBzZWQgLWUgcy9eLipcOy8vZyAtZSBzL1w6Liov L2dgCisgICAgICAgICAgICAgICAgaz1gZWNobyAke2l9IHwgc2VkIHMvXi4qXDovL2dgCisgICAg ICAgICAgICAgICAgaWYgWyAteiAiYGdyZXAgJHtqfSAvcHJvYy9jb25zb2xlc2AiIF07IHRoZW4K KyAgICAgICAgICAgICAgICAgICAgICAgIGlmIFsgLXogIiR7a30iIF0gfHwgWyAteiAiYGdyZXAg JHtrfSAvcHJvYy9jb25zb2xlc2AiIF0gfHwgWyAhIC1lIC9kZXYvJHtqfSBdOyB0aGVuCisgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgIHNlZCAtaSAtZSAvXi4qJHtqfVwgL2QgLWUgL14u KiR7an0kL2QgL2V0Yy9pbml0dGFiCisgICAgICAgICAgICAgICAgICAgICAgICBmaQorICAgICAg ICAgICAgICAgIGZpCisgICAgICAgIGRvbmUKKyAgICAgICAga2lsbCAtSFVQIDEKK2Vsc2UKKyAg ICAgICAgZXhpdCAxCitmaQorfQogCiAjIFNFUklBTF9DT05TT0xFUyBpcyBnZW5lcmFsbHkgZGVm aW5lZCBieSB0aGUgTUFDSElORSAuY29uZi4KICMgU2V0IFBBQ0tBR0VfQVJDSCBhcHByb3ByaWF0 ZWx5LgotLSAKMi4zNC4xCgo= 5002 2024-01-07 01:12:47 +0000 2024-01-07 01:12:47 +0000 reintroduce SERIAL_CONSOLES_CHECK inittab 0032-sysvinit-inittab-add-SERIAL_CONSOLES_CHECK.patch text/plain 1685 pokylinux RnJvbSBjYzZiMzQyNjg3NDhkMzMwZTNlN2E2NmIxZmMzMzk0YzE5YWM3NTM4IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBSb2JlcnQgQmVyZ2VyIDxSb2JlcnQuQmVyZ2VyQFJlbGlhYmxl RW1iZWRkZWRTeXN0ZW1zLmNvbT4KRGF0ZTogU2F0LCA2IEphbiAyMDI0IDE4OjM2OjI2ICswMDAw ClN1YmplY3Q6IFtQQVRDSF0gc3lzdmluaXQtaW5pdHRhYjogYWRkIFNFUklBTF9DT05TT0xFU19D SEVDSwoKU2lnbmVkLW9mZi1ieTogUm9iZXJ0IEJlcmdlciA8Um9iZXJ0LkJlcmdlckBSZWxpYWJs ZUVtYmVkZGVkU3lzdGVtcy5jb20+Ci0tLQogLi4uL3N5c3Zpbml0L3N5c3Zpbml0LWluaXR0YWJf Mi44OGRzZi5iYiAgICAgIHwgNDIgKysrKysrKysrKysrKysrLS0tLQogMSBmaWxlIGNoYW5nZWQs IDM0IGluc2VydGlvbnMoKyksIDggZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvbWV0YS9yZWNp cGVzLWNvcmUvc3lzdmluaXQvc3lzdmluaXQtaW5pdHRhYl8yLjg4ZHNmLmJiIGIvbWV0YS9yZWNp cGVzLWNvcmUvc3lzdmluaXQvc3lzdmluaXQtaW5pdHRhYl8yLjg4ZHNmLmJiCmluZGV4IDZiYmU1 MTdkZjEuLmVkNzRmNzFjNTQgMTAwNjQ0Ci0tLSBhL21ldGEvcmVjaXBlcy1jb3JlL3N5c3Zpbml0 L3N5c3Zpbml0LWluaXR0YWJfMi44OGRzZi5iYgorKysgYi9tZXRhL3JlY2lwZXMtY29yZS9zeXN2 aW5pdC9zeXN2aW5pdC1pbml0dGFiXzIuODhkc2YuYmIKQEAgLTUyLDYgKzUyLDMzIEBAIEVPRgog ICAgIGZpCiB9CiAKK3BrZ19wb3N0aW5zdDoke1BOfSAoKSB7CisjIHJ1biB0aGlzIG9uIGhvc3Qg YW5kIG9uIHRhcmdldAoraWYgWyAiJHtTRVJJQUxfQ09OU09MRVNfQ0hFQ0t9IiA9ICIiIF07IHRo ZW4KKyAgICAgICBleGl0IDAKK2ZpCit9CisKK3BrZ19wb3N0aW5zdF9vbnRhcmdldDoke1BOfSAo KSB7CisjIHJ1biB0aGlzIG9uIHRoZSB0YXJnZXQKK2lmIFsgLWUgL3Byb2MvY29uc29sZXMgXTsg dGhlbgorICAgICAgICB0bXA9IiR7U0VSSUFMX0NPTlNPTEVTX0NIRUNLfSIKKyAgICAgICAgZm9y IGkgaW4gJHRtcAorICAgICAgICBkbworICAgICAgICAgICAgICAgIGo9YGVjaG8gJHtpfSB8IHNl ZCAtZSBzL14uKlw7Ly9nIC1lIHMvXDouKi8vZ2AKKyAgICAgICAgICAgICAgICBrPWBlY2hvICR7 aX0gfCBzZWQgcy9eLipcOi8vZ2AKKyAgICAgICAgICAgICAgICBpZiBbIC16ICJgZ3JlcCAke2p9 IC9wcm9jL2NvbnNvbGVzYCIgXTsgdGhlbgorICAgICAgICAgICAgICAgICAgICAgICAgaWYgWyAt eiAiJHtrfSIgXSB8fCBbIC16ICJgZ3JlcCAke2t9IC9wcm9jL2NvbnNvbGVzYCIgXSB8fCBbICEg LWUgL2Rldi8ke2p9IF07IHRoZW4KKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgc2Vk IC1pIC1lIC9eLioke2p9XCAvZCAtZSAvXi4qJHtqfSQvZCAvZXRjL2luaXR0YWIKKyAgICAgICAg ICAgICAgICAgICAgICAgIGZpCisgICAgICAgICAgICAgICAgZmkKKyAgICAgICAgZG9uZQorICAg ICAgICBraWxsIC1IVVAgMQorZWxzZQorICAgICAgICBleGl0IDEKK2ZpCit9CisKICMgVVNFX1ZU IGFuZCBTRVJJQUxfQ09OU09MRVMgYXJlIGdlbmVyYWxseSBkZWZpbmVkIGJ5IHRoZSBNQUNISU5F IC5jb25mLgogIyBTZXQgUEFDS0FHRV9BUkNIIGFwcHJvcHJpYXRlbHkuCiBQQUNLQUdFX0FSQ0gg PSAiJHtNQUNISU5FX0FSQ0h9IgotLSAKMi4zNC4xCgo=