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-rw-r--r--man/mkinitcpio.8.txt25
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diff --git a/man/mkinitcpio.8.txt b/man/mkinitcpio.8.txt
index 56ac571..4175609 100644
--- a/man/mkinitcpio.8.txt
+++ b/man/mkinitcpio.8.txt
@@ -248,6 +248,31 @@ the kernel command line:
device to show up, if it is not available immediately. This defaults to 5
seconds. If an invalid integer is passed, this variable will have no effect.
+*rd.debug*::
+ Enables shell debug (xtrace). If 'rd.log' is not also a parameter on the kernel
+ command line, this parameter implies 'rd.log=console'.
+
+*rd.log*['=<console|file|kmsg|all>']::
+ Enables logging of early userspace messages. If specified, the optional
+ parameter describes where this information is logged. Multiple options can be
+ OR'd together using the pipe (|) character. Messages are always logged to
+ the console unless the 'quiet' parameter is passed. If the optional parameter
+ is not specified, 'kmsg|console' is assumed. If 'rd.log' is not present on the
+ kernel command line, no logging will take place.
+
+ *console*;;
+ Writes output to '/dev/console'.
+
+ *file*;;
+ Writes output to '/run/initramfs/init.log'.
+
+ *kmsg*;;
+ Writes output to the '/dev/kmsg' device (introduced in Linux 3.5). This
+ option is a no-op if your kernel lacks support for '/dev/kmsg'.
+
+ *all*;;
+ Writes output to all known log targets.
+
These are only the variables that the core of mkinitcpio honor. Additional
hooks may look for other environment variables and should be documented by the
help output for the hook.