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#!/bin/bash
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#
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# enable_sudo.bash
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#
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# v0.0.1 - 2021-02-23 - nelbren@nelbren.com
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#
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inform_task() {
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case $2 in
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1) echo -e "\e[30;48;5;3m$1!\e[0m\e[K";;
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2) echo -e "\e[7;49;93m$1:\e[0m\e[K";;
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*) echo -en "\e[30;48;5;7m$1...\e[0m\e[K"
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esac
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}
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inform_and_exit() {
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if [ "$1" == "0" ]; then
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echo -e "\e[7;49;92mOK\e[0m\e[K"
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else
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echo -e "\e[1;48;5;1m$2\e[0m\e[K"
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exit $1
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fi
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}
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check_if_root_running() {
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inform_task "Am I running as 'root'?"
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inform_and_exit $(id -u) "Run with 'root' user, because i need to install sudo"
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}
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sudo_install_package() {
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inform_task "Is the 'sudo' package installed?"
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if dpkg -s sudo 2>/dev/null 1>&2 ; then
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inform_and_exit 0 ""
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else
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inform_task "NO" 1
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inform_task "Ok, no problem, i will install 'sudo' package" 2
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apt install -y sudo
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inform_task "Is the 'sudo' package installed?"
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if dpkg -s sudo 2>/dev/null 1>&2 ; then
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inform_and_exit 0 ""
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else
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inform_and_exit $? "Problem installing sudo!"
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fi
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fi
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}
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sudo_disable_password() {
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inform_task "Now, i will disable the ask password in sudo"
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sed -Ei "s/(^%sudo.*) ALL/\1 NOPASSWD:ALL/" /etc/sudoers
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inform_and_exit $? "Problem disassibling password!"
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}
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sudo_add_to_sudo_group() {
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user=$(who am i | cut -d" " -f1)
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inform_task "It is the turn to add the '$user' to the 'sudo' group"
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if groups $user | grep -q sudo ; then
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inform_and_exit 0 ""
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else
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inform_task "NO" 1
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inform_task "Ok, no problem, i will add the '$user' to sudo group" 2
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usermod -aG sudo $user
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inform_task "It is the turn to add the '$user' to the 'sudo' group"
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if groups $user | grep -q sudo ; then
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inform_and_exit 0 ""
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else
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inform_and_exit $? "Problem adding to sudo group!"
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fi
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fi
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}
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sudo_test_access_to_user() {
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user=$(who am i | cut -d" " -f1)
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inform_task "Let's test if the '$user' is in the sudo group"
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if su $user -c groups | grep -q sudo ; then
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inform_and_exit 0 ""
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else
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inform_and_exit 2 "Problem checking if user has 'sudo' group!"
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fi
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inform_task "Let's test if the '$user' can run sudo"
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id=$(su $user -c "sudo id -u")
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inform_and_exit $id "Problem checking if user can access 'sudo'"
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}
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check_if_root_running
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sudo_install_package
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sudo_disable_password
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sudo_add_to_sudo_group
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sudo_test_access_to_user
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