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-rw-r--r--sys-utils/wdctl.84
1 files changed, 4 insertions, 0 deletions
diff --git a/sys-utils/wdctl.8 b/sys-utils/wdctl.8
index 7edf80866..efd8b5917 100644
--- a/sys-utils/wdctl.8
+++ b/sys-utils/wdctl.8
@@ -14,6 +14,10 @@ Show hardware watchdog status. The default device is
If more than one device is specified then the output is separated by
one blank line.
.PP
+If the device is already used or user has no permissions to read from the device than
+.B wdctl
+reads data from sysfs. In this case information about supported features (flags) might be missing.
+.PP
Note that the number of supported watchdog features is hardware specific.
.SH OPTIONS
.TP