Removes keychain entries in the logged-in-user's login keychain related to campus print servers. Useful after password changes.

clear-saved-printer-passwords.sh

#!/bin/bash

###
#
#            Name:  clear-saved-printer-passwords.sh
#     Description:  Removes keychain entries in the logged-in-user's login keychain
#                   related to campus print servers. Useful after password changes.
#          Author:  Matthew Warren <[email protected]>
#         Created:  2015-08-15
#   Last Modified:  2017-02-11
#
###

# Binary locations
security=/usr/bin/security
cancel=/usr/bin/cancel
cupsenable=/usr/sbin/cupsenable
lpstat=/usr/bin/lpstat
cupsctl=/usr/sbin/cupsctl   
launchctl=/bin/launchctl

# Print servers
print_servers=(\
    'print1.example.com' \
    'print2.example.com' \
    )

# Current user
current_user=$(python -c "from SystemConfiguration import \
    SCDynamicStoreCopyConsoleUser; import sys; username = \
    (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; \
    username = [username,\"\"][username in [u\"loginwindow\", None, u\"\"]]; \
    sys.stdout.write(username + \"\n\");")

# Delete all pending print jobs
$cancel -a -

# Clear current user's keychain of printer-related entries
for print_server in "${print_servers[@]}"; do
    echo "===================="
    search=$(su "${current_user}" -c "${security} find-internet-password -s \
        ${print_server} 2> /dev/null")
    if [[ -z $search ]]; then
        echo "Print Server ${print_server} not found in \
        /Users/${current_user}/login.keychain"
    else
        if su "${current_user}" -c "${security} delete-internet-password -s \
            ${print_server} \
            /Users/${current_user}/Library/Keychains/login.keychain > \
            /dev/null 2>&1"; then
            echo "Removed an entry for ${print_server}"
        else
            echo "Failed to remove keychain entry for ${print_server}"
        fi
    fi
done

# Resume all queues
mapped_printers=$($lpstat -p | grep disabled | awk '{print $2}')
for i in $mapped_printers; do
    $cupsenable "${i}"
done

# Enable CUPS web interface
$cupsctl webinterface=yes

# Restart CUPS
$launchctl start org.cups.cupsd

exit 0