[PATCH v1 1/2] installer: introduce sys_api.sh backend interface

["'Kasturi Shekar' via isar-users" <isar-users@googlegroups.com>]

Signed-off-by: Kasturi Shekar <kasturi.shekar@siemens.com>
---
 .../deploy-image/files/usr/bin/sys_api.sh     | 84 +++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 meta-isar/recipes-installer/deploy-image/files/usr/bin/sys_api.sh

diff --git a/meta-isar/recipes-installer/deploy-image/files/usr/bin/sys_api.sh b/meta-isar/recipes-installer/deploy-image/files/usr/bin/sys_api.sh
new file mode 100644
index 00000000..b144419e
--- /dev/null
+++ b/meta-isar/recipes-installer/deploy-image/files/usr/bin/sys_api.sh
@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+#
+# sys_api.sh — Ported installer system APIs
+# -------------------------------------------------------------------
+
+# Load shared framework utilities
+source ./func.sh || {
+    echo "Error: func.sh not found or not readable." >&2
+    exit 1
+}
+
+# -------------------------------------------------------------------
+# API: locate_disk_images
+# Description:
+#   Find disk image files (.wic, .wic.bz2) under given path.
+# Usage:
+#   sys_locate_disk_images search_path=/install
+# Returns JSON:
+#   {"error":"", "retval":"0", "images":["/install/image.wic", ...]}
+# -------------------------------------------------------------------
+sys_locate_disk_images() {
+    local -A ARGS
+    local required=(search_path)
+    api_args ARGS required[@] "$@" || {
+        pack_return_data error "$_args_error" retval "1"
+        return 1
+    }
+
+    local fn="${FUNCNAME[0]}"
+    local path="${ARGS[search_path]}"
+
+    log_info "$fn" "Searching for disk images in '$path'"
+
+    local images
+    images=$(find "$path" -type f -iname "*.wic*" ! -iname "*.wic.bmap" 2>/dev/null)
+
+    # when no images found in /install
+    if [[ -z "$images" ]]; then
+        log_warn "$fn" "No images found."
+        pack_return_data error "No images found" retval "1"
+        return 1
+    fi
+
+    # Convert newline-separated paths into JSON array elements
+    local json_images
+    json_images=$(printf '"%s",' $images | sed 's/,$//')
+    # final JSON response on stdout
+    echo "{ \"error\":\"\", \"retval\":\"0\", \"images\":[${json_images}] }"
+}
+
+
+# -------------------------------------------------------------------
+# API: sys_list_valid_target_devices
+# Description:
+#   Shell-friendly variant of sys_get_valid_target_devices.
+#   Prints one valid device per line (absolute path).
+# Usage:
+#   sys_list_valid_target_devices
+# Output:
+#   /dev/sdb
+#   /dev/sdc
+# -------------------------------------------------------------------
+sys_list_valid_target_devices() {
+    local dev
+
+    for dev in /sys/block/*; do
+        dev=$(basename "$dev")
+
+        case "$dev" in
+            loop*|ram*|sr*|mtd*)
+                continue
+                ;;
+        esac
+
+        # skip inactive md devices
+        if [[ "$dev" == md* ]]; then
+            [ -f "/sys/block/$dev/md/array_state" ] || continue
+            state=$(cat /sys/block/$dev/md/array_state)
+            [ "$state" = "active" ] || [ "$state" = "clean" ] || continue
+        fi
+
+        echo "/dev/$dev"
+    done
+}
-- 
2.39.5

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