Fix ttyacm

Dockerfile

@@ -1,6 +1,6 @@
-ARG ALPINE_BASE=3.21.2
+ARG ALPINE_BASE=3.23.3
 
 FROM alpine:${ALPINE_BASE} as builder
 
 RUN apk add gcc libc-dev libusb-dev linux-headers
 

README.md

@@ -14,23 +14,24 @@ Tested on Raspberry Pi 3, 4
 docker run -v /dev/bus/usb/001/013:/dev/bus/usb/001/013 --privileged rugarci/usbreset /dev/bus/usb/001/013
 ```
 
-Also works with device names (/dev/ttyUSB0) or symbolic links (/dev/XBee)
+Also works with device names (/dev/ttyUSB0, /dev/ttyACM0) or symbolic links (/dev/XBee)
 
 ```bash
-docker run -v /dev:/dev --privileged rugarci/usbreset /dev/XBee
+docker run -v /dev:/dev -v /sys:/sys:ro --privileged rugarci/usbreset /dev/XBee
 ```
 And multiple ports
 ```bash
-docker run -v /dev:/dev --privileged rugarci/usbreset /dev/XBee /dev/ttyUSB4
+docker run -v /dev:/dev -v /sys:/sys:ro --privileged rugarci/usbreset /dev/XBee /dev/ttyUSB4
 
 For Docker compose
 
 ```yaml
   usbreset-xbee:
     image: rugarci/usbreset
-    command: /dev/XBee
-    volumes:
-      - "/dev:/dev"
+    command: /dev/XBee /dev/ttyUSB0 /dev/ttyACM0 /dev/bus/usb/001/013
+    volumes:  
+      - /sys:/sys:ro 
+      - /dev/bus/usb:/dev/bus/usb
     privileged: true
 ```
 

reset.sh

@@ -1,31 +1,44 @@
 #!/bin/bash
 
 if [[ -z "$1" ]]; then
-    echo "Device to reset not passed"
-    exit 1
+echo "Device to reset not passed"
+exit 1
 fi
 
-if [ $(dirname $1) == "/dev" ]; then
+if [ "$(dirname "$1")" == "/dev" ]; then
+
+LINK_DEV=$(readlink -f "$1")
+
+if [ "$(dirname "$LINK_DEV")" == "/dev" ]; then
+REAL_DEV=$(basename "$LINK_DEV")
 
-  export LINK_DEV=$(readlink -f $1)
+SYS_PATH=$(readlink -f /sys/class/tty/$REAL_DEV)
 
-  if [ $(dirname $LINK_DEV) == "/dev" ]; then
-    export REAL_DEV=$(basename $LINK_DEV)
-    export DEV_FOLDER=$(find /sys/devices -lname *$REAL_DEV)/../..
-    echo $DEV_FOLDER
-    export BUS_NUM=$(echo `printf "%03d" $(cat $DEV_FOLDER/busnum)`)
-    export DEV_NUM=$(echo `printf "%03d" $(cat $DEV_FOLDER/devnum)`)
+while [ "$SYS_PATH" != "/" ]; do
+    if [ -f "$SYS_PATH/busnum" ] && [ -f "$SYS_PATH/devnum" ]; then
+        BUS_NUM=$(printf "%03d" "$(cat $SYS_PATH/busnum)")
+        DEV_NUM=$(printf "%03d" "$(cat $SYS_PATH/devnum)")
+        break
+    fi
+    SYS_PATH=$(dirname "$SYS_PATH")
+done
 
-    echo $1 resolved to $BUS_NUM:$DEV_NUM
+if [ -z "$BUS_NUM" ] || [ -z "$DEV_NUM" ]; then
+    echo "Unable to resolve USB bus/device for $1"
+    exit 1
+fi
 
-    export DEV_BUS_FOLDER=/dev/bus/usb/$BUS_NUM/$DEV_NUM
-  else
-    export DEV_BUS_FOLDER=$LINK_DEV
-    echo $1 points to $LINK_DEV
-  fi
+echo "$1 resolved to $BUS_NUM:$DEV_NUM"
+
+DEV_BUS=/dev/bus/usb/$BUS_NUM/$DEV_NUM
+
+else
+DEV_BUS=$LINK_DEV
+echo "$1 points to $LINK_DEV"
+fi
 else
-  export DEV_BUS_FOLDER=$1
+DEV_BUS=$1
 fi
 
-echo Resetting $DEV_BUS_FOLDER
-./usbreset $DEV_BUS_FOLDER
+echo "Resetting $DEV_BUS"
+./usbreset $DEV_BUS