Kdump dracut hooks need to enter emergency shell, currently it directly call
"sh -i -l", with recent dracut this does not work anymore without proper ctty.
It will be convinient to seperate a standalone function _emergency_shell for
dracut modules to call.
---
modules.d/99base/dracut-lib.sh | 58 ++++++++++++++++++++++-------------------
1 file changed, 32 insertions(+), 26 deletions(-)
--- dracut.orig/modules.d/99base/dracut-lib.sh
+++ dracut/modules.d/99base/dracut-lib.sh
@@ -864,6 +864,37 @@ wait_for_loginit()
rm -f /run/initramfs/loginit.pipe /run/initramfs/loginit.pid
}
+_emergency_shell()
+{
+ local _name="$1"
+ if [ -x /lib/systemd/systemd ]; then
+ > /.console_lock
+ echo "PS1=\"$_name:\${PWD}# \"" >/etc/profile
+ systemctl start emergency.service
+ debug_off
+ while [ -e /.console_lock ]; do sleep 1; done
+ debug_on
+ else
+ echo "Dropping to debug shell."
+ echo
+ export PS1="$_name:\${PWD}# "
+ [ -e /.profile ] || >/.profile
+
+ _ctty="$(getarg rd.ctty=)" && _ctty="/dev/${_ctty##*/}"
+ if [ -z "$_ctty" ]; then
+ _ctty=console
+ while [ -f /sys/class/tty/$_ctty/active ]; do
+ _ctty=$(cat /sys/class/tty/$_ctty/active)
+ _ctty=${_ctty##* } # last one in the list
+ done
+ _ctty=/dev/$_ctty
+ fi
+ [ -c "$_ctty" ] || _ctty=/dev/tty1
+ strstr "$(setsid --help 2>/dev/null)" "ctty" && CTTY="-c"
+ setsid $CTTY /bin/sh -i -l 0<$_ctty 1>$_ctty 2>&1
+ fi
+}
+
emergency_shell()
{
local _ctty
@@ -883,32 +914,7 @@ emergency_shell()
echo
if getargbool 1 rd.shell -d -y rdshell || getarg rd.break -d rdbreak; then
- if [ -x /lib/systemd/systemd ]; then
- > /.console_lock
- echo "PS1=\"$_rdshell_name:\${PWD}# \"" >/etc/profile
- systemctl start emergency.service
- debug_off
- while [ -e /.console_lock ]; do sleep 1; done
- debug_on
- else
- echo "Dropping to debug shell."
- echo
- export PS1="$_rdshell_name:\${PWD}# "
- [ -e /.profile ] || >/.profile
-
- _ctty="$(getarg rd.ctty=)" && _ctty="/dev/${_ctty##*/}"
- if [ -z "$_ctty" ]; then
- _ctty=console
- while [ -f /sys/class/tty/$_ctty/active ]; do
- _ctty=$(cat /sys/class/tty/$_ctty/active)
- _ctty=${_ctty##* } # last one in the list
- done
- _ctty=/dev/$_ctty
- fi
- [ -c "$_ctty" ] || _ctty=/dev/tty1
- strstr "$(setsid --help 2>/dev/null)" "ctty" && CTTY="-c"
- setsid $CTTY /bin/sh -i -l 0<$_ctty 1>$_ctty 2>&1
- fi
+ _emergency_shell $_rdshell_name
else
warn "$action has failed. To debug this issue add \"rd.shell\" to the kernel command line."
# cause a kernel panic
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