96 lines
3.5 KiB
Text
96 lines
3.5 KiB
Text
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#!/usr/bin/env bash
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# @file ~/.local/bin/add-user
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# @brief Add a user and a group with the same name on either Linux or macOS
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# @description
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# This script is utilized by other scripts to ensure that there is both a user and group
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# named by the single argument that this executable accepts. It checks whether or not
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# there is already a user / group with the name present on the system before running
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# any code. On macOS, it assigns the user an ID that equal to the maximum user ID present
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# on the system plus one.
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#
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# This script was generated with ChatGPT.
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# Check if the script is being run as root
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if [[ $EUID -ne 0 ]]; then
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echo -e "\e[91mThis script must be run as root\e[0m"
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exit 1
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fi
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# Check if the correct number of arguments is provided
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if [[ $# -ne 1 ]]; then
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echo -e "\e[93mUsage: $0 <group>\e[0m"
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exit 1
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fi
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GROUP=$1
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# Check if the operating system is macOS
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if [[ "$(uname)" == "Darwin" ]]; then
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echo -e "\e[96mCreating group and user ${GROUP} on macOS...\e[0m"
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# Check if the group already exists
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if ! sudo dscl . read /Groups/"${GROUP}" >/dev/null 2>&1; then
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# Create the group
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sudo dscl . create /Groups/"${GROUP}"
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# Ensure the group has a GID
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if [[ "$(sudo dscl . read /Groups/"$group" gid 2>&1)" == *"No such key"* ]]; then
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MAX_ID_GROUP=$(dscl . -list /Groups gid | awk '{print $2}' | sort -ug | tail -1)
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GROUP_ID=$((MAX_ID_GROUP+1))
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sudo dscl . create /Groups/"${GROUP}" gid "$GROUP_ID"
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fi
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else
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echo -e "\e[93mGroup ${GROUP} already exists\e[0m"
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fi
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# Check if the user already exists
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if ! sudo dscl . read /Users/"${GROUP}" >/dev/null 2>&1; then
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# Create the user
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sudo dscl . create /Users/"${GROUP}"
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# Ensure the user has a PrimaryGroupID
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if [[ "$(sudo dscl . read /Users/"${GROUP}" PrimaryGroupID 2>&1)" == *"No such key"* ]]; then
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sudo dscl . create /Users/"${GROUP}" PrimaryGroupID 20
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fi
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# Ensure the user has a UniqueID
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if [[ "$(sudo dscl . read /Users/"${GROUP}" UniqueID 2>&1)" == *"No such key"* ]]; then
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MAX_ID_USER=$(dscl . -list /Users UniqueID | sort -nr -k 2 | head -1 | grep -oE "[0-9]+$")
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USER_ID="$((MAX_ID_USER+1))"
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sudo dscl . create /Users/"${GROUP}" UniqueID "$USER_ID"
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fi
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# Add the user to the group
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sudo dseditgroup -o edit -t user -a "${GROUP}" "${GROUP}"
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# Add the current user to the group
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sudo dseditgroup -o edit -t user -a "${USER}" "${GROUP}"
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else
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echo -e "\e[93mUser ${GROUP} already exists\e[0m"
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fi
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echo -e "\e[92mGroup and user ${GROUP} created successfully on macOS\e[0m"
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exit 0
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elif [[ "$(uname)" == "Linux" ]]; then
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echo -e "\e[96mCreating group and user ${GROUP} on Linux...\e[0m"
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# Check if the group already exists
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if ! grep -qE "^${GROUP}:" /etc/group; then
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# Create the group
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groupadd "${GROUP}"
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else
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echo -e "\e[93mGroup ${GROUP} already exists\e[0m"
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fi
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# Check if the user already exists
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if ! id -u "${GROUP}" >/dev/null 2>&1; then
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# Create the user and assign it to the group
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useradd -g "${GROUP}" "${GROUP}"
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else
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echo -e "\e[93mUser ${GROUP} already exists\e[0m"
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fi
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echo -e "\e[92mGroup and user ${GROUP} created successfully on Linux\e[0m"
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exit 0
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fi
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# If the operating system is neither macOS nor Linux, display an error message
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echo -e "\e[91mUnsupported operating system\e[0m"
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exit 1
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