sonic-buildimage/platform/broadcom/docker-saiserver-brcm/start.sh

#!/usr/bin/env bash
HWSKU_DIR=/usr/share/sonic/hwsku

start_bcm()
{
    [ -e /dev/linux-bcm-knet ] || mknod /dev/linux-bcm-knet c 122 0
    [ -e /dev/linux-user-bde ] || mknod /dev/linux-user-bde c 126 0
    [ -e /dev/linux-kernel-bde ] || mknod /dev/linux-kernel-bde c 127 0
}

generate_profile()
{
    # There are two ways to specify the contents of the SAI_INIT_CONFIG_FILE and they are mutually exclusive
    # via current method (sai.profile.j2) or new method (config.bcm.j2)
    # If delta is large, use sai.profile.j2 which basically require the user to select which config file to use
    # If delta is small, use config.bcm.j2 where additional SAI INIT config properties are added
    #   based on specific device metadata requirement
    #   in this case sai.profile should have been modified to use the path /etc/sai.d/config.bcm
    # There is also a possibility that both sai.profile.j2 and config.bcm.j2 are absent.  in that cacse just copy
    # sai.profile to the new /etc/said directory.

    # Create/Copy the sai.profile to /etc/sai.d/sai.profile
    mkdir -p /etc/sai.d/

    if [ -f $HWSKU_DIR/sai.profile.j2 ]; then
        sonic-cfggen -d -t $HWSKU_DIR/sai.profile.j2 > /etc/sai.d/sai.profile
    else
        if [ -f $HWSKU_DIR/config.bcm.j2 ]; then
            sonic-cfggen -d -t $HWSKU_DIR/config.bcm.j2 > /etc/sai.d/config.bcm
        fi
        if [ -f $HWSKU_DIR/sai.profile ]; then
            cp $HWSKU_DIR/sai.profile /etc/sai.d/sai.profile
        fi
    fi
}

rm -f /var/run/rsyslogd.pid

supervisorctl start rsyslogd

generate_profile
start_bcm

supervisorctl start saiserver