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core/addNormalUser.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+#WARNING: Used for core functionality in setup.sh
+#         DO NOT rename the script and test changes well!
+
+
+
+# Note that an unprivileged user can use this script successfully,
+# if no user has to be added to the host because it already exists.
+function addNormalUser() {
+    local _USER
+    _USER="${1:?"Missing first parameter USER"}"
+    readonly _USER
+
+    #The user already exists
+    id -u "${_USER}" &> /dev/null \
+        && echo "SUCCESS: The user already exists:                  ("$(readlink -f ${0})")" \
+        && echo "  - '${_USER}'" \
+        && return 0
+
+    [ "$(id -u)" == "0" ] \
+        && adduser --gecos 'Normal user' --disabled-password "${_USER}" \
+        && chown -R "${_USER}:${_USER}" "/home/${_USER}" \
+        && echo "SUCCESS: The user was created:                     ("$(readlink -f ${0})")" \
+        && echo "  - '${_USER}'" \
+        && echo "  - no password was set, use passwd if needed" \
+        && echo "  - existing home directories were taken over" \
+        && return 0
+
+    echo "FAIL: The user could not be created:               ("$(readlink -f ${0})")"
+    echo "  - '${_USER}'"
+    echo "  - due to an error or insufficient rights."
+    return 1
+}
+
+# sanitizes all parameters
+addNormalUser \
+    "$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
+    && exit 0 || exit 1