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#!/bin/sh
# My Arch Linux installation script
# by David T. Sadler <david@davidtsadler.com>
# License: GNU GPLv3
### OPTIONS AND VARIABLES ###
### FUNCTIONS ###
read_password() {
PASSWORD="$(
# always read from the tty even when redirected:
exec < /dev/tty || exit # || exit only needed for bash
# save current tty settings:
tty_settings=$(stty -g) || exit
# schedule restore of the settings on exit of that subshell
# or on receiving SIGINT or SIGTERM:
trap 'stty "$tty_settings"' EXIT INT TERM
# disable terminal local echo
stty -echo || exit
# prompt on tty
printf "$1" > /dev/tty
# read password as one line, record exit status
IFS= read -r password; ret=$?
# display a newline to visually acknowledge the entered password
echo > /dev/tty
# return the password for $REPLY
printf '%s\n' "$password"
exit "$ret"
)"
}
get_username_and_password() {
printf "Enter a name for the user account: "
read name
while ! echo "$name" | grep "^[a-z_][a-z0-9_-]*$" >/dev/null 2>&1; do
unset name
printf "Username not valid. Give a username beginning with a letter, with only lowercase letters, - or _.\n\n"
printf "Enter a name for the user account: "
read name
done
read_password "Enter a password for that user: "
pass1=$PASSWORD
read_password "Retype password: "
pass2=$PASSWORD
while ! [ "$pass1" = "$pass2" ]; do
unset pass2
echo "Passwords do not match."
read_password "Enter a password again: "
pass1=$PASSWORD
read_password "Retype password: "
pass2=$PASSWORD
done
}
add_user() {
get_username_and_password
[ -d "/home/$name" ] && echo "Skipping adding of user as $name already exists" && return
useradd -m -s /bin/zsh "$name" >/dev/null 2>&1 || mkdir -p /home/"$name" && chown "$name":"$name" /home/"$name"
usermod -aG wheel "$name"
echo "$name:$pass1" | chpasswd
unset pass1 pass2
}
### THE ACTUAL SCRIPT ###
add_user
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