In some cases, exception happened, default handling is called. However,
user may not like the handling, want to specify a handler for these
exceptions.
Add an exception handle check function. Call it where exceptions happened,
and specify a extra special handler. If user want the special handler handles
this exception, related cmdline is added.
Then Dracut will check the cmdline, if related cmdline exists, call the
specified handler; if not, call the default handler.
The function can be called like below:
exception_handle_check -h continue_on_fail
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
---
modules.d/99base/dracut-lib.sh | 40 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 40 insertions(+), 0 deletions(-)
diff --git a/modules.d/99base/dracut-lib.sh b/modules.d/99base/dracut-lib.sh
index cc6c7e8..35ed3a3 100755
--- a/modules.d/99base/dracut-lib.sh
+++ b/modules.d/99base/dracut-lib.sh
@@ -938,6 +938,46 @@ emergency_shell()
[ -e /run/initramfs/.die ] && exit 1
}
+exception_handle_check()
+{
+ local action_wanted
+ if [ "$1" = "-h" ]; then
+ [ $# -le 1 ] && echo "No exception handler specified" && emergency_shell
+ action_wanted=$2;
+ case "$action_wanted" in
+ continue_on_fail)
+ ;;
+ reboot)
+ ;;
+ emergency_shell)
+ ;;
+ *)
+ echo "Wrong exception handler input: $action_wanted"
+ action_wanted=emergency_shell
+ esac
+ else
+ action_wanted=emergency_shell
+ fi
+
+ case "$action_wanted" in
+ continue_on_fail)
+ action=$(getarg rd.exceptionhandler=)
+ [ -z "$action" -o "$action" != "continue_on_fail" ] && emergency_shell
+ ;;
+ emergency_shell)
+ emergency_shell
+ ;;
+ reboot)
+ reboot -f
+ ;;
+ *) #default
+ ##impossible come here
+ ;;
+ esac
+
+ return 0
+}
+
# Retain the values of these variables but ensure that they are unexported
# This is a POSIX-compliant equivalent of bash's "export -n"
export_n()
--
1.7.1
--
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