#!/bin/sh -e

# Turn off Debian default for %sudo
sed -i -e '/^%sudo/d' /etc/sudoers || true

# Add minion user for salt-minion
if ! grep -q '^minion' /etc/passwd; then
    adduser --quiet --firstuid 100 --system --disabled-login --ingroup vyattacfg \
        --gecos "salt minion user" --shell /bin/vbash minion
    adduser --quiet minion frrvty
    adduser --quiet minion sudo
    adduser --quiet minion adm
    adduser --quiet minion dip
    adduser --quiet minion disk
    adduser --quiet minion users
    adduser --quiet minion frr
fi

# OpenVPN should get its own user
if ! grep -q '^openvpn' /etc/passwd; then
    adduser --quiet --firstuid 100 --system --group --shell /usr/sbin/nologin openvpn
fi

# Enable 2FA/MFA support for SSH and local logins
for file in /etc/pam.d/sshd /etc/pam.d/login
do
    PAM_CONFIG="# Check 2FA/MFA authentication token if enabled (per user)\nauth       required     pam_google_authenticator.so nullok forward_pass\n"
    grep -qF -- "pam_google_authenticator.so" $file || \
    sed -i "/^# Standard Un\*x authentication\./i${PAM_CONFIG}" $file
done

# Both RADIUS and TACACS users belong to aaa group - this must be added first
if ! grep -q '^aaa' /etc/group; then
    addgroup --firstgid 1000 --quiet aaa
fi

# Remove TACACS user added by base package - we use our own UID range and group
# assignments - see below
if grep -q '^tacacs' /etc/passwd; then
    if [ $(id -u tacacs0) -ge 1000 ]; then
        level=0
        vyos_group=vyattaop
        while [ $level -lt 16 ]; do
            userdel tacacs${level} || true
            level=$(( level+1 ))
        done 2>&1
    fi
fi

# Add TACACS system users required for TACACS based system authentication
if ! grep -q '^tacacs' /etc/passwd; then
    # Add the tacacs group and all 16 possible tacacs privilege-level users to
    # the password file, home directories, etc. The accounts are not enabled
    # for local login, since they are only used to provide uid/gid/homedir for
    # the mapped TACACS+ logins (and lookups against them). The tacacs15 user
    # is also added to the sudo group, and vyattacfg group rather than vyattaop
    # (used for tacacs0-14).
    level=0
    vyos_group=vyattaop
    while [ $level -lt 16 ]; do
        adduser --quiet --system --firstuid 900 --disabled-login --ingroup users \
            --home /home/tacacs${level} --gecos "TACACS+ mapped user at privilege level ${level}" \
            --shell /bin/vbash tacacs${level}
        # fix home permission - onl required b/c of system user
        chmod 700 /home/tacacs${level}
        adduser --quiet tacacs${level} frrvty
        adduser --quiet tacacs${level} adm
        adduser --quiet tacacs${level} dip
        adduser --quiet tacacs${level} users
        adduser --quiet tacacs${level} aaa
        if [ $level -lt 15 ]; then
            adduser --quiet tacacs${level} vyattaop
            adduser --quiet tacacs${level} operator
        else
            adduser --quiet tacacs${level} vyattacfg
            adduser --quiet tacacs${level} sudo
            adduser --quiet tacacs${level} disk
            adduser --quiet tacacs${level} frr
        fi
        level=$(( level+1 ))
    done 2>&1 | grep -v 'User tacacs${level} already exists'
fi

# Add RADIUS operator user for RADIUS authenticated users to map to
if ! grep -q '^radius_user' /etc/passwd; then
    adduser --quiet --firstuid 1000 --disabled-login --ingroup users \
        --no-create-home --gecos "RADIUS mapped user at privilege level operator" \
        --shell /sbin/radius_shell radius_user
    adduser --quiet radius_user frrvty
    adduser --quiet radius_user vyattaop
    adduser --quiet radius_user operator
    adduser --quiet radius_user adm
    adduser --quiet radius_user dip
    adduser --quiet radius_user users
    adduser --quiet radius_user aaa
fi

# Add RADIUS admin user for RADIUS authenticated users to map to
if ! grep -q '^radius_priv_user' /etc/passwd; then
    adduser --quiet --firstuid 1000 --disabled-login --ingroup users \
        --no-create-home --gecos "RADIUS mapped user at privilege level admin" \
        --shell /sbin/radius_shell radius_priv_user
    adduser --quiet radius_priv_user frrvty
    adduser --quiet radius_priv_user vyattacfg
    adduser --quiet radius_priv_user sudo
    adduser --quiet radius_priv_user adm
    adduser --quiet radius_priv_user dip
    adduser --quiet radius_priv_user disk
    adduser --quiet radius_priv_user users
    adduser --quiet radius_priv_user frr
    adduser --quiet radius_priv_user aaa
fi

# add hostsd group for vyos-hostsd
if ! grep -q '^hostsd' /etc/group; then
    addgroup --quiet --system hostsd
fi

# add dhcpd user for dhcp-server
if ! grep -q '^dhcpd' /etc/passwd; then
    adduser --quiet --system --disabled-login --no-create-home --home /run/dhcp-server dhcpd
    adduser --quiet dhcpd hostsd
fi

# ensure the proxy user has a proper shell
chsh -s /bin/sh proxy

# create /opt/vyatta/etc/config/scripts/vyos-preconfig-bootup.script
PRECONFIG_SCRIPT=/opt/vyatta/etc/config/scripts/vyos-preconfig-bootup.script
if [ ! -x $PRECONFIG_SCRIPT ]; then
    mkdir -p $(dirname $PRECONFIG_SCRIPT)
    touch $PRECONFIG_SCRIPT
    chmod 755 $PRECONFIG_SCRIPT
    cat <<EOF >>$PRECONFIG_SCRIPT
#!/bin/sh
# This script is executed at boot time before VyOS configuration is applied.
# Any modifications required to work around unfixed bugs or use
# services not available through the VyOS CLI system can be placed here.

EOF
fi

# create /opt/vyatta/etc/config/scripts/vyos-postconfig-bootup.script
POSTCONFIG_SCRIPT=/opt/vyatta/etc/config/scripts/vyos-postconfig-bootup.script
if [ ! -x $POSTCONFIG_SCRIPT ]; then
    mkdir -p $(dirname $POSTCONFIG_SCRIPT)
    touch $POSTCONFIG_SCRIPT
    chmod 755 $POSTCONFIG_SCRIPT
    cat <<EOF >>$POSTCONFIG_SCRIPT
#!/bin/sh
# This script is executed at boot time after VyOS configuration is fully applied.
# Any modifications required to work around unfixed bugs
# or use services not available through the VyOS CLI system can be placed here.

EOF
fi

# symlink destination is deleted during ISO assembly - this generates some noise
# when the system boots: systemd-sysv-generator[1881]: stat() failed on
# /etc/init.d/README, ignoring: No such file or directory. Thus we simply drop
# the file.
if [ -L /etc/init.d/README ]; then
    rm -f /etc/init.d/README
fi

# Remove unwanted daemon files from /etc
# conntackd
# pmacct
# fastnetmon
# ntp
DELETE="/etc/logrotate.d/conntrackd.distrib /etc/init.d/conntrackd /etc/default/conntrackd
        /etc/default/pmacctd /etc/pmacct
        /etc/networks_list /etc/networks_whitelist /etc/fastnetmon.conf
        /etc/ntp.conf /etc/default/ssh
        /etc/powerdns /etc/default/pdns-recursor
        /etc/ppp/ip-up.d/0000usepeerdns /etc/ppp/ip-down.d/0000usepeerdns"
for tmp in $DELETE; do
    if [ -e ${tmp} ]; then
        rm -rf ${tmp}
    fi
done

# Remove logrotate items controlled via CLI and VyOS defaults
sed -i '/^\/var\/log\/messages$/d' /etc/logrotate.d/rsyslog
sed -i '/^\/var\/log\/auth.log$/d' /etc/logrotate.d/rsyslog

# Fix FRR pam.d "vtysh_pam" vtysh_pam: Failed in account validation T5110
if test -f /etc/pam.d/frr; then
    if grep -q 'pam_rootok.so' /etc/pam.d/frr; then
        sed -i -re 's/rootok/permit/' /etc/pam.d/frr
    fi
fi

# Enable Cloud-init pre-configuration service
systemctl enable vyos-config-cloud-init.service

# Generate API GraphQL schema
/usr/libexec/vyos/services/api/graphql/generate/generate_schema.py

# Update XML cache
python3 /usr/lib/python3/dist-packages/vyos/xml_ref/update_cache.py

# T1797: disable VPP support for rolling release, should be used by developers
# only (in the initial phase). If you wan't to enable VPP use the below command
# on your VyOS installation:
#
# sudo mv /opt/vyatta/share/vyatta-cfg/vpp /opt/vyatta/share/vyatta-cfg/templates/vpp
if [ -d /opt/vyatta/share/vyatta-cfg/templates/vpp ]; then
    if [ -d /opt/vyatta/share/vyatta-cfg/vpp ]; then
        rm -rf /opt/vyatta/share/vyatta-cfg/vpp
    fi
    mv /opt/vyatta/share/vyatta-cfg/templates/vpp /opt/vyatta/share/vyatta-cfg/vpp
fi