add bin/usbreset

1 files changed, 35 insertions, 0 deletions

diff --git a/bin/usbreset b/bin/usbreset
new file mode 100755
index 0000000..093a502
--- /dev/null
+++ b/bin/usbreset
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+set -e
+[ -n "$DEBUG" ] && set -x
+
+# check requirements
+for tool in awk fd; do
+	if ! command -v "$tool" >/dev/null; then
+		printf "%s: %s not installed but required\n" "$(basename "$0")" "$tool" >&2
+		exit 1
+	fi
+done
+
+if [ "$1" = "-h" ]; then
+	printf "usage: %s DEV_NODE\n\n" "$0"
+	exit 2
+fi
+
+dev_node=$1
+dev_node=$(basename "${dev_node}")
+
+serial=$(fd "${dev_node}" /sys/devices |
+	awk 'BEGIN{RS="/"} /usb/{print}' |
+	xargs -I{} cat /sys/bus/usb/devices/{}/serial)
+[ -z "${serial}" ] && exit 1
+
+bus=$(fd "${serial}" /sys/bus/pci/drivers/)
+[ -z "${bus}" ] && exit 1
+
+driver=$(dirname "${bus}")
+[ -z "${driver}" ] && exit 1
+
+printf "%s" "${serial}" | doas tee "${driver}/unbind" >/dev/null
+sleep 2
+printf "%s" "${serial}" | doas tee "${driver}/bind" >/dev/null