From: Choong YinThong <[email protected]> Error log will be logged into /var/log/message. Added in more condition checking on the script. Check /proc/tty/drivers and /proc/tty/driver/* file system to retrieve active targeted serial. Only establish getty with active serial in runtime.
[YOCTO #10844] Reviewed-by: Saul Wold <[email protected]> Signed-off-by: Choong YinThong <[email protected]> --- .../sysvinit/sysvinit-inittab/start_getty | 38 +++++++++++++++++++--- 1 file changed, 34 insertions(+), 4 deletions(-) diff --git a/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty b/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty index e3d052a..31b4413 100644 --- a/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty +++ b/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty @@ -1,5 +1,35 @@ #!/bin/sh -if [ -c /dev/$2 ] -then - /sbin/getty -L $1 $2 $3 -fi +#################################################################################### +# This script is use to automatic start serial console once power up. +# Script enhancement has been done base on Bug YOCTO 10844. +# Configuration can be done in meta/conf/machine/*.conf variable SERIAL_CONSOLES. +# Most of the information is retrieve from /proc virtual filesystem which +# contain all the runtime system information (eg. system memory, device mount, etc). +#################################################################################### + +# Get active serial filename. +active_serial=$(grep "serial" /proc/tty/drivers | grep -oh "^\s*\S*") + +# Re-phrase input parameter from ttyS target index (ttyS1, ttyS2, ttyAMA0, etc). +runtime_tty=$(echo $2 | grep -oh '[0-9]') + +for line in $active_serial; do + # File is availability, file content current active serial target index. + if [ -e /proc/tty/driver/$line ] + then + # File content a lot of unknown serial. We use -v to remove all unmatch and get left off. + # Tail use to avoid 1st line included into the filter because 1st line is file description. + activetty=$(grep -v "unknown" /proc/tty/driver/$line | tail -n +2 | grep -oh "^\s*\S*[0-9]") + for active in $activetty; do + # Check if both index is match then proceed to enable the serial console. + if [ $active -eq $runtime_tty ] + then + if [ -c /dev/$2 ] + then + /sbin/getty -L $1 $2 $3 + fi + break + fi + done + fi +done -- 2.7.4 -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
