#!/bin/bash
# functions: This file contain some system and oracle configure preparing from oracle install.
# author: huangxw 2010.8.16

#####################################
### 1. Create User and group
#####################################
/usr/sbin/groupadd oinstall
/usr/sbin/groupadd dba

if [ -z "$(id oracle &> /dev/null)" ]; then
  /usr/sbin/useradd -g oinstall -G dba oracle
else
  /usr/sbin/usermod -g oinstall -G dba oracle
fi
echo "oracle" | passwd --stdin oracle

#####################################
### 2. Make direction
#####################################
mkdir -p /u01/app/oracle/product/10.2.0/db_1
mkdir -p /u01/app/oracle/oraInventory
mkdir -p /u01/app/oracle/oradata
mkdir -p /u01/app/oracle/flash_recovery_area

chown -R oracle:oinstall /u01/app/oracle
chmod -R 775 /u01/app/oracle

#####################################
### 3. Configure system
### 3.1 /etc/sysctl.conf
#####################################
# 536870912 1073741824

parastr=(
"kernel.shmall=2097152"
"kernel.shmmax=1073741824"
"kernel.shmmni=4096"
"kernel.sem=250 32000 100 128"
"fs.file-max=65536"
"net.ipv4.ip_local_port_range=1024 65000"
"net.core.rmem_default=262144"
"net.core.rmem_max=262144"
"net.core.wmem_default=262144"
"net.core.wmem_max=262144"
)

if [ -z "$(grep "\# Added for Oracle" /etc/sysctl.conf)" ]; then
  echo "" >> /etc/sysctl.conf
  echo "# Added for Oracle" >> /etc/sysctl.conf
  echo "" >> /etc/sysctl.conf
  
  size=${#parastr[@]};

  for ((i=0;i<$size;i++))
  do
    eval tmp=\${parastr[i][@]}
    echo $tmp >> /etc/sysctl.conf
  done
fi

# take affect after restart
/sbin/sysctl -p

#####################################
### 3. Configure system
### 3.2 /etc/redhat-release
#####################################
echo "Red Hat Enterprise Linux Server release 4 (Tikanga)" > /etc/redhat-release

#####################################
### 3. Configure system
### 3.3 /etc/pam.d/login
#####################################
if [ -z "$(grep "\# Added for Oracle" /etc/security/limits.conf)" ]; then
  echo "" >> /etc/security/limits.conf
  echo "# Added for Oracle" >> /etc/security/limits.conf
  echo "" >> /etc/security/limits.conf
  
  echo "oracle soft nproc 2047" >> /etc/security/limits.conf
  echo "oracle hard nproc 16384" >> /etc/security/limits.conf
  echo "oracle soft nofile 1024" >> /etc/security/limits.conf
  echo "oracle hard nofile 65536" >> /etc/security/limits.conf
fi

#####################################
### 3. Configure system
### 3.4 /etc/pam.d/login
#####################################
[ -z "$(grep "session required /lib/security/pam_limits.so" /etc/security/limits.conf)" ] && echo "session required /lib/security/pam_limits.so" >> /etc/pam.d/login
[ -z "$(grep "session required pam_limits.so" /etc/security/limits.conf)" ] && echo "session required pam_limits.so" >> /etc/pam.d/login

#####################################
### 3. Configure system
### 3.5 /etc/selinux/config
#####################################
sed -i 's/^SELINUXTYPE=targeted/SELINUXTYPE=disabled/g' /etc/selinux/config

#####################################
### 4. Configure oracle
#####################################
parastr=(
'export ORACLE_BASE=/u01/app/oracle'
'export ORACLE_HOME=$ORACLE_BASE/product/10.2.0/db_1'
'export ORACLE_SID=orcl'
'export LD_LIBRARY_PATH=$ORACLE_HOME/lib'
'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib:/usr/X11R6/lib'
'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/jdk/jre/lib/i386'
'export