diff options
Diffstat (limited to 'meta/recipes-core/sysvinit/sysvinit-inittab/start_getty')
| -rw-r--r-- | meta/recipes-core/sysvinit/sysvinit-inittab/start_getty | 58 |
1 files changed, 54 insertions, 4 deletions
diff --git a/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty b/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty index 6eaeb7a2b0..96fd6cfcfd 100644 --- a/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty +++ b/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty @@ -1,5 +1,55 @@ #!/bin/sh -if [ -c /dev/$2 ] -then - /sbin/getty -L $1 $2 -fi +############################################################################### +# This script is used to automatically set up the serial console(s) on startup. +# The variable SERIAL_CONSOLES can be set in meta/conf/machine/*.conf. +# Script enhancement has been done based on Bug YOCTO #10844. +# Most of the information is retrieved from /proc virtual filesystem containing +# all the runtime system information (eg. system memory, device mount, etc). +############################################################################### + +# Get active serial filename. +active_serial=$(grep "serial" /proc/tty/drivers | cut -d/ -f1 | sed "s/ *$//") + +# Rephrase input parameter from ttyS target index (ttyS1, ttyS2, ttyAMA0, etc). +runtime_tty=$(echo $2 | grep -oh '[0-9]') + +# busybox' getty does this itself, util-linux' agetty needs extra help +getty="/sbin/getty" +case $(readlink -f "${getty}") in + */busybox*) + ;; + *) + if [ -x "/usr/bin/setsid" ] ; then + setsid="/usr/bin/setsid" + fi + ;; +esac + +# Backup $IFS. +DEFAULT_IFS=$IFS +# Customize Internal Field Separator. +IFS="$(printf '\n\t')" + +for line in $active_serial; do + # Check we have the file containing current active serial target index. + if [ -e "/proc/tty/driver/$line" ] + then + # Remove all unknown entries and discard the first line (desc). + activetty=$(grep -v "unknown" "/proc/tty/driver/$line" \ + | tail -n +2 | grep -oh "^\s*\S*[0-9]") + for active in $activetty; do + # If indexes do match then enable the serial console. + if [ $active -eq $runtime_tty ] + then + if [ -c /dev/$2 ] + then + ${setsid:-} ${getty} -L $1 $2 $3 + fi + break + fi + done + fi +done + +# Restore $IFS. +IFS=$DEFAULT_IFS |