...

start_update()
{
    /usr/bin/update_entry &
}

...

umount /mnt
mount_tf_card

sh /usr/sbin/tf_update.sh
start_update

i=5
while [ $i -gt 0 ]
do
    sleep 1
    pid=`pgrep /usr/bin/update_entry`
    if [ -z "$pid" ]; then
        echo "The /usr/bin/update_entry has exited, start_update!!!"
        break
    fi
    i=`expr $i - 1`
done

if [ $mount_status -eq 1 ]; then
    if [ -f /tmp/enter_update ]; then
        echo "/tmp/enter_update file is exist, should be update!"
        update_flag=1
    else
        echo "/tmp/enter_update file is not exist!"
        update_flag=0
    fi
else
    update_flag=0
fi

if [ $update_flag -eq 1 ]; then
    /tmp/net.sh
fi

...

int sub_108f8()
{
    FILE *v0; // r6
    char v2[152]; // [sp+0h] [bp-98h] BYREF

    memset(v2, 0, 0x80u);
    v0 = popen("find /mnt/ -maxdepth 1 -name \"update.nor.sh\"", "r");
    if (v0)
    {
        while (fgets(v2, 128, v0))
        {
            if (strstr(v2, "update.nor.sh"))
            {
                puts("==================find update.nor.sh!! start update.nor.sh==================");
                system("cp -f /mnt/update.nor.sh /tmp/net.sh");
                usleep(0x2710u);
                system("chmod 777 /tmp/net.sh");
                system("touch /tmp/enter_update");
                system("sync");
                usleep(0x2710u);
                break;
            }
        }
        pclose(v0);
        return 0;
    }
    else
    {
        puts("error:popen failed");
        return -1;
    }
}