lyadmin/perl-script/create_user.pl

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Perl
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#!/usr/bin/perl
use warnings;
use strict;
use JSON;
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# create-user.pl
#
# processes new user request files
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my $working_dir = "./";
my $account_dir = $working_dir."req/";
my $conf_path = $working_dir."lyadmin.conf.json";
my $ul_path = $working_dir."user_list.txt";
my $SHELL_ENUM;
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my @g;
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# Given a username... prompts and creates that user
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sub create($){
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my $id = $_[0];
my $fn1 = $account_dir.$id.".ident";
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my $username;
my $shell_pref;
my $user_email;
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my $pub_key;
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# read in username and validate
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open FILE, $fn1 or die "could not open file $fn1";
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$username = <FILE>;
chomp $username;
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if(length($username) > 31 || !($username =~ /^[A-Za-z][A-Za-z0-9]+$/)){
printf("%s has an INVALID username\n", $id);
die ("oh no");
}
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# read in email
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$user_email = <FILE>;
chomp $user_email;
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# read in shell and validate
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{
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my $s0 = <FILE>;
chomp $s0;
unless($SHELL_ENUM->{$s0}){
die "invalid shell setting $s0 in file $id.ident";
}
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$shell_pref = $SHELL_ENUM->{$s0};
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}
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# read in pub key
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$pub_key = <FILE>;
chomp $pub_key;
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{
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# Prompt to make sure the username looks OK
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my $cmd;
$cmd = "useradd -m -s " . $shell_pref . " " . $username;
printf("Y/N is this command OK?: %s\n", $cmd);
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if(!(<STDIN> =~ /^y/i)){
die "invalid characters?!!";
}
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# create the user
system($cmd);
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system("echo '".$pub_key."' > /home/$username/.ssh/authorized_keys");
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system("chmod 711 /home/$username");
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system("mv $fn1 $fn1.done");
system("echo $username >> $ul_path");
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}
close FILE;
}
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# MAIN starts here
# Checks if user is root
if(!(`id` =~ /uid=0/)){
die "please run this script as root";
}
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# Adjusts the relative file paths based on where
# the script runs from
if( `pwd` =~ /perl-script\/?\s*$/){
$working_dir = "../";
$account_dir = $working_dir."req/";
$conf_path = $working_dir."lyadmin.conf.json";
$ul_path = $working_dir."user_list.txt";
printf("%s\n", $conf_path);
}elsif(!(join(" ", glob("./*")) =~ /perl-script/)){
die "please run this script with ./perl-script/ as the present working directory";
}
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# Opens the conf file to read
# shell enums
open FILE, $conf_path or die "could not open file $conf_path";
{
my $conf_str;
my $conf_obj;
local $/=undef;
$conf_str = <FILE>;
chomp $conf_str;
$conf_obj = decode_json($conf_str);
$SHELL_ENUM = $conf_obj->{"shell"};
};
close FILE;
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# Saves all new user requests to an array
@g = glob("$account_dir*");
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@g = map { s/.*\/([^\/]*).ident$/$1/; $_ } grep {$_ =~ /ident$/} @g;
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# Iterate and create the users
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for my $fn (@g){
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create($fn);
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}