bin/rc: Close and reopen RC FIFO to make read block

Otherwise, after every command is read and handled, the read utility
immediately returns failure due to EOF on every call until another
command is written to the RC FIFO, causing the listening loop to become
busy and burn CPU time.

1 files changed, 2 insertions, 2 deletions

diff --git a/bin/rc b/bin/rc
index 4ce2fdb..ae77113 100755
--- a/bin/rc
+++ b/bin/rc
@@ -145,7 +145,7 @@ listen()
 	local arg=
 
 	while :; do
-		if read -r magic cmd arg; then
+		if read -r magic cmd arg 0<"${rc_fifo}"; then
 			case "${magic}" in "${MAGIC}");; *) continue;; esac
 			case "${cmd}" in
 				'beg' | 'end')
@@ -168,7 +168,7 @@ listen()
 					;;
 			esac
 		fi
-	done 0<"${rc_fifo}"
+	done
 
 	return 0
 }