#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T.
# All rights reserved.
#
#
# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# Copyright 2019 Joyent, Inc.
#

. /lib/svc/share/smf_include.sh
. /lib/svc/share/net_include.sh

set -o xtrace

# Make sure that the libraries essential to this stage of booting can be found.
LD_LIBRARY_PATH=/lib; export LD_LIBRARY_PATH

#
# For the GZ, use one of the following values for hostname, in order:
#   * DHCP hostname (if set on a primary interface)
#   * hostname value from config file
#   * hostname bootparam
#   * if not a headnode:
#     * admin MAC address
#     * any other MAC address
#
# If none of the above could be found, default to "headnode" for headnodes, and
# "unknown" for non-headnodes.
#
# The hostname must be set to something, because
# tooltalk will hang unless the name can be locally resolved.
# Sendmail also requires the name to be resolvable locally.
# Later, in inetsvc, we create a name "unknown" and create a entry
# in the local /etc/inet/hosts file pairing "unknown" with the IP
# address assigned by DHCP.  The use of bootparams as a fallback
# for all non-DHCP cases provides compatibility with the
# behavior of the system before netstrategy was introduced.
#
# For non-global zones, fall back to the `uname -n` value provided by the
# kernel if /etc/nodename does not exist, as is expected on an initial boot.
#

set_gz_hostname() {
    hostname=${CONFIG_hostname}
    if [ -z "$hostname" ] || [ "$hostname" == "unknown" ]; then
        hostname=$SYSINFO_Bootparam_hostname
    fi

    if [ -n "$hostname" ] && [ "$hostname" != "unknown" ]; then
        return
    fi

    # $headnode is set by load_sdc_config()
    if [ "$headnode" == "true" ]; then
        hostname="headnode"
        return
    fi

    if [[ -n ${SYSINFO_NIC_admin} ]]; then
        eval "admin_mac=\${SYSINFO_Network_Interface_${SYSINFO_NIC_admin}_MAC_Address}"
        if [[ -n ${admin_mac} ]]; then
            hostname=$(echo "${admin_mac}" | tr ':' '-')
            return
        fi
    fi

    fallback_mac=$(set | grep "^SYSINFO_Network_Interface_.*_MAC_Address" | head -n1 | cut -d'=' -f2)
    if [[ -n ${fallback_mac} ]]; then
        hostname=$(echo "${fallback_mac}" | tr ':' '-')
        return
    fi

    hostname="unknown"
}


smf_netstrategy

case "$_INIT_NET_STRATEGY" in
    "dhcp") hostname=`/sbin/dhcpinfo Hostname` ;;
    "rarp") hostname=`/sbin/hostconfig -h -p bootparams`
        trap 'intr=1' 2 3
        while [ -z "$hostname" -a ! -f /etc/.UNCONFIGURED -a \
            -z "$intr" ]; do
            echo "re-trying host configuration..."
            # Restrict this to IPv4 interfaces.
            /sbin/ifconfig -adD4 auto-revarp up
            hostname=`/sbin/hostconfig -h -p bootparams`
        done
        trap 2 3 ;;
    # /etc/nodename defaults to "unknown" on SmartOS
    "none") hostname="`shcat /etc/nodename 2>/dev/null`"
        if [ -z "$hostname" ]; then
            if smf_is_globalzone; then
                hostname=`/sbin/hostconfig -h -p bootparams`
            else
                hostname=`/sbin/uname -n`
            fi
        fi ;;
esac

# Load sysinfo variables with SYSINFO_ prefix and config variables with
# CONFIG_ prefix.
# Note: since we're still starting up, "soft" values like network IP and such could
# not be set yet.

if smf_is_globalzone; then
    . /lib/sdc/config.sh

    load_sdc_sysinfo

    if boot_file_config_enabled; then
        load_boot_file_config
    else
        load_sdc_config
    fi
fi

#
# If the netstrategy was unsuccessful and we haven't got a locally configured
# name, default to "unknown"
#
if [ -z "$hostname" ] || [ "$hostname" == "unknown" ]; then
    hostname="`shcat /etc/nodename 2>/dev/null`"
    if [ -z "$hostname" ] || [ "$hostname" == "unknown" ]; then
        if smf_is_globalzone; then
            set_gz_hostname
        else
            hostname="unknown"
        fi
    fi
fi

if smf_is_globalzone; then
    echo "$hostname" > /etc/nodename
fi

/sbin/uname -S $hostname

# Reloading sysinfo here serves two purposes:
#   - getting the IP info (which should exist now)
#   - updating the host info (which we just set)
eval $(/usr/bin/sysinfo -f -p | sed -e "s/^/SYSINFO_/")

# Try to add the /etc/hosts entry if we can find an IP
if [[ -n ${SYSINFO_NIC_admin} ]]; then
    eval "ipaddr=\${SYSINFO_Network_Interface_${SYSINFO_NIC_admin}_IPv4_Address}"
fi
if [[ -z ${ipaddr} ]]; then
    ipaddr=$(set | grep "^SYSINFO_Network_Interface_.*_IPv4_Address" | head -n1 | cut -d'=' -f2)
fi
if [[ -n ${ipaddr} ]]; then
    fullname=""

    if [ -n "$CONFIG_dns_domain" ]; then
        fullname=" ${hostname}.${CONFIG_dns_domain}"
    fi

    printf "${ipaddr}\t${hostname}${fullname}\n" >> /etc/hosts
fi

# Reset the library path now that we are past the critical stage
unset LD_LIBRARY_PATH

exit $SMF_EXIT_OK