Initial commit

src/adapt-user.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+main() {
+    local username="${1:-abc}"
+    local uid="${2:-1000}"
+    local gid="${3:-1000}"
+    local home="${4:-/home/abc}"
+
+    usermod -d "/root" "${username}"
+    groupmod -o -g "${gid}" "${username}"
+    usermod -o -u "${uid}" "${username}"
+    usermod -d "${home}" "${username}"
+
+    # Ensure tty group exists with GID 4 (Alpine standard)
+    if ! getent group tty >/dev/null; then
+        addgroup -g 4 tty
+    fi
+
+    # Add user to tty group for /dev/pts/* access
+    addgroup "${username}" tty 2>/dev/null
+
+    if tty -s; then
+        local tty_device
+        tty_device="$(tty)"
+
+        if [ -f "${tty_device}" ]; then
+            chmod g+rw "${tty_device}" 2>/dev/null
+        fi
+    fi
+}
+main "${@}"