Linux scripting assistance

[Moodkiller]

I am stuck on a little personal project of mine where I need to create a script that will allow you to enter users (according to a specific syntax) and subsequently those users are added to the system.

 

Unfortunately there are specific conditions to be met where by the users must be entered as group name:base user name:number of users. E.g I want to add 5 new users to a group called "NOSL" with the base user name "NOSL-" The following should be entered into a input box as follows NOSL:NOSL-:5 

 

I am currently using ubuntu 13.1. 

 

I would greatly appreciate any and all help. There are a few more finer details that need addressing, but will add those later on. 

[JohnFlower]

Add this to your .bashrc:

adduserisforchumps() {        if  [ "$1" ] && [ "$2" ] && [ "$3" ]; then                count=1                while [ $count -le $3 ]; do                        read -p "User name: " user                        echo $1 $2$user                        count=$(( $count + 1 ))                done        else                echo "Wrong"        fi}

Edit: Spot the difference. Edited June 4, 2014 by JohnFlower

[Moodkiller]

Add this to your .bashrc:

Thank you, and I cant even seem to find my .bashrc file... (unless you were referring to pasting it into the bash terminal its self? bare with me...) I assume its in the home directory?

 

The script has to be a stand alone file as well, If I understand what you want me to do.  

E.g of the format

 

And the mistake was fi} corrected to fi and } and a new line? (Going off the email notification that I sent which does not carry proper formatting) 

[JohnFlower]

The .bashrc file is a file in your home directory. You can use it to add/change commands in your bash shell.

Just create the file if you don't have one already. Add what I pasted and then test it out. You will have to start a new session before it kicks in.

(To test, type 'adduserisforchumps herp derp- 5')

Edit: Oh you mean it's an assignment..?

Edited June 4, 2014 by JohnFlower

[Moodkiller]

Right so I added your code to the bashrc file

 

restarted, entered adduserisforchumps herp derp -5, (no errors were given), went and checked the passwd file and there were no new users there?

  

[JohnFlower]

Of course. Adding users this way is kinda dumb, so I left out the command that actually adds the user >_>

I'm sure you can figure it out.

P.S '-5' would break this, probably. You should add decent error handling if you plan to use this often.

[Moodkiller]

Of course. Adding users this way is kinda dumb, so I left out the command that actually adds the user >_>

LOL but I need this xD. The way that is required of me to do is by adding the users via an input box with the syntax described in the OP. but I assume the method is the same. 

 

I'm sure you can figure it out.

P.S '-5' would break this, probably. You should add decent error handling if you plan to use this often.

Thanks, unfortunately I do not have the programming knowledge needed for this, but thank you. And yes, that another requirement (if user exists, then an error, if group exists, then an error etc etc)

[Moodkiller]

This is what I have so far:

#!/bin/bash


#variables

group=""

base_name=""

amount=""



#open fd

# 0 = stIN

# 1 = stOUT

# 2 = stDERR

exec 3>&1


#Store data in $VALUES varibale

values=$(dialog --ok-label "Submit" \

		--backtitle "Add user" \

		--title "Add users" \

		--form "Create a new user" \

15 50 0 \

	 "base name:" 1 1 "$base_name" 1 11 10 0  \

	 "group:" 2 1 "$group"  2 11 5 0 \

	 "amount:" 3 1 "$amount" 3 11 8 0 \

2>&1 1>&3)


#close fd

exec 3>&-


#########################################

if [ $(id -u) -eq 0 ]; then

	read -p "$base_name"

#	read -s -p "Enter password : " password

	egrep "^$base_name" /etc/passwd >/dev/null

	if [ $? -eq 0 ]; then

		echo "$base_name exists!"

		exit 1

	else

#		pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)

		sudo useradd -m -p $base_name

		[ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"

	fi

else

	echo "Only root may add a user to the system"

	exit 2

fi


#save $values to appropriate locations

#sudo groupadd $group

#sudo useradd -G&$base_name 


#Delete temp files

[ -f $values ] && rm $values

Unfortunately I cant get the layout quite right and I didn't completely understand your first code that you sent, so was trying out this version.

Edited June 6, 2014 by Moodkiller

[JohnFlower]

There's a layout?

You will need a loop of some kind to do the operation x amount of times.

[Moodkiller]

Sadly, yeah there is, something like this:

but it must be all on one line and each 'field' as such should be separated by a colon. And yes I though as much with the loop, and the loop should be equal to the "amount" of users, then I also have to include a function that will automatically name the other users