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ref: 9cffce6c622bee3daf2ccc07d6c77e9b1410e2dc
parent: e61060a5fe59b10d8f68e75eb5e5380d8a1b29e4
author: cinap_lenrek <cinap_lenrek@localhost>
date: Sun Aug 21 23:29:45 EDT 2011

proc(3): document interrupt ctl message

--- a/sys/man/3/proc
+++ b/sys/man/3/proc
@@ -341,6 +341,15 @@
 With a zero argument, tracing for the proc is turned off, with a non-zero numeric
 argument, it is turned on.
 .TP 10n
+.B interrupt
+Interrupt a blocking system call. If no blocking call was in progress,
+the interrupt will be pending and the next attempt to block will be interrupted.
+This is similar to posting a note but, unlike notes, a pending interrupt is not
+cleared when crossing the user/kernel boundary.
+.TP 10n
+.B nointerrupt
+Clear a pending interrupt.
+.TP 10n
 .B "period\ \fInu
 Set the real-time scheduling period of the process to
 .IR nu ,
--