From 3ebb6f36cf530f6a3bee9cfc615c443803133d43 Mon Sep 17 00:00:00 2001
From: Storm Dragon <stormdragon2976@gmail.com>
Date: Sat, 26 Apr 2025 04:09:03 -0400
Subject: [PATCH] Added convience rename-user script in root's home directory.
 You still need a temp user if doing this from ssh.

---
 pi4/files/root/rename-user.sh | 80 +++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100755 pi4/files/root/rename-user.sh

diff --git a/pi4/files/root/rename-user.sh b/pi4/files/root/rename-user.sh
new file mode 100755
index 0000000..566d4c7
--- /dev/null
+++ b/pi4/files/root/rename-user.sh
@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+# Renames a user
+# Required arguments: old user name, new user name
+
+if [[ $# -ne 2 ]]; then
+    echo "Usage: $0 old-user new-user"
+    exit 1
+fi
+
+old_user="$1"
+new_user="$2"
+
+# Make sure old user exists
+if ! id "$old_user" >/dev/null 2>&1; then
+    echo "The user $old_user does not exist."
+    exit 1
+fi
+
+# Make sure old user is not logged in
+if pgrep -u "$old_user" >/dev/null; then
+    echo "The user $old_user is currently logged in or has running processes. Cannot continue."
+    echo "Would you like to forcibly log out $old_user? (Y/N)"
+    read -r answer
+    answer="${answer:0:1}"
+    answer="${answer^}"
+    if [[ "$answer" != "Y" ]]; then
+        exit 1
+    fi
+    loginctl terminate-user "$old_user"
+    sleep 2
+    if pgrep -u "$old_user" >/dev/null; then
+        echo "The user $old_user still has running processes after termination. Cannot continue."
+        exit 1
+    fi
+fi
+
+# Make sure new user does not exist
+if id "$new_user" >/dev/null 2>&1; then
+    echo "The user name $new_user is already taken."
+    exit 1
+fi
+
+# Make sure the new name is acceptable
+if ! [[ "$new_user" =~ ^[a-z_][a-z0-9_-]{0,31}$ ]]; then
+    echo "$new_user is not an acceptable user name."
+    exit 1
+fi
+
+# Passed all safety checks, proceed with the rename
+groups=$(id -nG "$old_user")
+groups="${groups// /,}"
+usermod -G "$groups" -m -d "/home/$new_user" -l "$new_user" "$old_user"
+
+# Update nodm.conf if it exists
+if [[ -e /etc/nodm.conf ]]; then
+    sed -i -e "s#^NODM_USER=.*#NODM_USER='$new_user'#" -e "s#^NODM_XSESSION=.*#NODM_XSESSION='/home/$new_user/.xinitrc'#" /etc/nodm.conf
+fi
+
+# Copy over crontab if it exists
+if crontab -u "$old_user" -l >/tmp/${old_user}_crontab.bak 2>/dev/null; then
+    if crontab -u "$new_user" "/tmp/${old_user}_crontab.bak"; then
+        rm "/tmp/${old_user}_crontab.bak"
+    else
+        echo "Warning: failed to restore crontab for $new_user."
+        rm "/tmp/${old_user}_crontab.bak"
+    fi
+fi
+
+# Optionally update files in new home directory
+echo "Would you like to search for references to $old_user and update them to $new_user in files located in /home/$new_user?"
+echo "This can take a while. (Y/N)"
+read -r answer
+answer="${answer:0:1}"
+answer="${answer^}"
+if [[ "$answer" == "Y" ]]; then
+    find "/home/$new_user" -type f -exec sed -i "s|$old_user|$new_user|g" "{}" \;
+fi
+
+exit 0