From f4f1aeaccff2253721a474438fff37213d566a54 Mon Sep 17 00:00:00 2001
From: Marc Beninca <git@marc.beninca.link>
Date: Sun, 30 Mar 2025 16:45:48 +0200
Subject: [PATCH] cs/device

---
 sh/cryptsetup.sh | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/sh/cryptsetup.sh b/sh/cryptsetup.sh
index 0f2629c..b7da532 100644
--- a/sh/cryptsetup.sh
+++ b/sh/cryptsetup.sh
@@ -29,7 +29,19 @@ rwx_crypt() {
 				case "${action}" in
 				"${action_open}")
 					rwx_log_info "OPEN"
-					# TODO find next available device
+					local nbd_device nbd_size
+					local nbd_index=0
+					while [ -z "${nbd_device}" ]; do
+						if [ -f "/dev/nbd${nbd_index}" ]; then
+							nbd_size="$(cat /sys/block/nbd"${nbd_index}/size")"
+							[ "${nbd_size}" -eq 0 ] &&
+								nbd_device="/dev/nbd${nbd_index}"
+						fi
+						nbd_index=$((nbd_index + 1))
+					done
+					[ -z "${nbd_device}" ] &&
+						rwx_log_error 4 "No device available"
+					rwx_log_info "device: ${nbd_device}"
 					# TODO connect device
 					# TODO open device
 					echo "${pass_phrase}"