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test device exists before allowing getty to run

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Signed-off-by: Avi Deitcher <avi@deitcher.net>
This commit is contained in:
Avi Deitcher 2017-08-06 10:00:15 +03:00
parent 2a26a68aff
commit cc174b4df0
1 changed files with 7 additions and 1 deletions
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8
pkg/getty/usr/bin/rungetty.sh
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@ -15,6 +15,12 @@ start_getty() {
term="linux" term="linux"
[ "$speed" = "$1" ] && speed=115200 [ "$speed" = "$1" ] && speed=115200
# does the device even exist?
if [ ! -c /dev/$tty ]; then
echo "getty: cmdline has console=$tty but /dev/$tty is not a character device; not starting getty for $tty" | tee /dev/console
return
fi
case "$tty" in case "$tty" in
ttyS*|ttyAMA*|ttyUSB*|ttyMFD*) ttyS*|ttyAMA*|ttyUSB*|ttyMFD*)
line="-L" line="-L"
@ -35,7 +41,7 @@ start_getty() {
if ! grep -q -w "$tty" "$securetty"; then if ! grep -q -w "$tty" "$securetty"; then
# we could not find the tty in securetty, so start a getty but warn that root login will not work # we could not find the tty in securetty, so start a getty but warn that root login will not work
echo "getty: cmdline has console=$tty but does not exist in $securetty; will not be able to log in as root on this tty $tty." > /dev/$tty echo "getty: cmdline has console=$tty but does not exist in $securetty; will not be able to log in as root on this tty $tty." | tee /dev/$tty
fi fi
# respawn forever # respawn forever
infinite_loop setsid.getty -w /sbin/agetty $loginargs $line $speed $tty $term & infinite_loop setsid.getty -w /sbin/agetty $loginargs $line $speed $tty $term &