iiserlogin.sh

Shell script to log in to IISER Captive Portal.

Configuration

Set username and password variables in the script, i.e., replace iiser.login with your actual username and wxyz1234 with your actual password. Then just execute the script. You can also bind the script to some keybinding.

Technical Point (no one needs to worry about)

Though currently the IISER Captive Portal doesn't require to send live status, it can in principle do so. In that case, the program will keep on running in the background. Hence it is ideal to run the script through a systemd service and just restart the service whenever logging in is required.

Cute Trick

You can setup NetworkManager dispatcher to automatically launch the script after connecting to IISER network (see the section below).

My Setup

Systemd service

/etc/systemd/system/iiserlogin.service

[Unit]
Description=IISER Captive Portal Login
 
[Service]
User=ashish
Environment=DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
ExecStart=/home/ashish/.scripts/iiserlogin.sh

(/home/ashish/.scripts/iiserlogin.sh)

NetworkManager dispatcher script

/etc/NetworkManager/dispatcher.d/01-iiserlogin.sh

#!/bin/sh
interface="$1"
status="$2"

[ "$status" != up ] && exit
case "$interface" in
    eno1)
        nmcli -t device show eno1 |
         grep -qFm1 "GENERAL.CONNECTION:IISER Wired Connection" &&
            systemctl --no-block restart iiserlogin.service
        ;;
    wlp5s0)
        { [ "$CONNECTION_ID" = Students ] || [ "$CONNECTION_ID" = Guest ] ;} &&
            systemctl --no-block restart iiserlogin.service
        ;;
esac

(eno1 and wlps5s0 are the interface names of my ethernet and wifi devices [run nmcli].)