set my ORACLE_HOME, PATH, ORACLE_SID

I posted yesterday some of my aliases. My favorite (and most obfuscated) one is the following (for bash)

eval $(awk -F: '/^[+a-zA-Z]/{l=tolower($1); sub("^+","",l); print "alias "l"=47x="$2";PATH=${PATH//$ORACLE_HOME/$x}; ORACLE_HOME=$x; ORACLE_SID="$1"; echo ORACLE_SID="$1"; 47; "}' /etc/oratab 2>/dev/null)


I am setting my path and a default sid/home in my .profile

[ -z "$ORACLE_SID" ] && export ORACLE_SID=LSC01
export ORACLE_HOME=$(sed -n "s/:.$//;s/^$ORACLE_SID://p" /etc/oratab)
PATH=$ORACLE_HOME/bin
PATH=$PATH:$ORACLE_HOME/opmn/bin
PATH=$PATH:$ORACLE_HOME/dcm/bin
PATH=$PATH:$HOME/bin
PATH=$PATH:/usr/local/bin
PATH=$PATH:/usr/bin
PATH=$PATH:/usr/X11R6/bin
PATH=$PATH:/bin
PATH=$PATH:/usr/sbin
PATH=$PATH:/opt/gnome/bin
PATH=$PATH:/opt/kde3/bin
PATH=$PATH:.
export PATH


Than in my eval command above set an alias for each line in /etc/oratab
# /etc/oratab
LSC01:/app/oracle/oracle/product/10.2.0/db_2:Y
+ASM1:/home/oracle/oracle/product/10.2.0/db_2:Y
RAC1:/home/oracle/oracle/product/10.2.0/db_2:Y
RAC2:/home/oracle/oracle/product/10.2.0/db_2:Y
crs:/app/oracle/product/10.2.0/crs:N


so here is the list of my dynamically generated aliases
alias asm1='x=/home/oracle/oracle/product/10.2.0/db_2; PATH=${PATH//$ORACLE_HOME/$x}; ORACLE_HOME=$x; ORACLE_SID=+ASM1; echo ORACLE_SID=+ASM1;'
alias crs='x=/app/oracle/product/10.2.0/crs; PATH=${PATH//$ORACLE_HOME/$x};ORACLE_HOME=$x; ORACLE_SID=crs; echo ORACLE_SID=crs;'
alias lsc01='x=/app/oracle/oracle/product/10.2.0/db_2; PATH=${PATH//$ORACLE_HOME/$x};ORACLE_HOME=$x; ORACLE_SID=LSC01; echo ORACLE_SID=LSC01;'
alias rac1='x=/home/oracle/oracle/product/10.2.0/db_2; PATH=${PATH//$ORACLE_HOME/$x}; ORACLE_HOME=$x; ORACLE_SID=RAC1; echo ORACLE_SID=RAC1;'
alias rac2='x=/home/oracle/oracle/product/10.2.0/db_2; PATH=${PATH//$ORACLE_HOME/$x}; ORACLE_HOME=$x; ORACLE_SID=RAC2;echo ORACLE_SID=RAC2;'


One alias I also like to set is a switch-user alias + keep settings and profile !
alias oracle='su - oracle -c "DISPLAY=$DISPLAY ORACLE_HOME=$ORACLE_HOME ORACLE_SID=$ORACLE_SID PATH=$PATH bash --rcfile ~lsc/.bashrc"'

I also have exotic, less recommendable, aliases…

alias +='sqlplus -L /'
alias -- -='cd -'
alias ..='cd ..'
alias ...='cd ../..'
alias ....='cd ../../..'
alias .....='cd ../../../..'
alias ......='cd ../../../../..'
alias .......='cd ../../../../../..'
alias ........='cd ../../../../../../..'


I also have a very handy function, called p
p() {
sqlplus -L -s "/ as sysdba" <<EOF | sed -n 's/@ //p'
set echo off lin 9999 trimsp on feedb off head off pages 0 tab off
col name for a25
select '@',name, value from v\$parameter2 where upper(name) like upper('%$1%');
EOF
}
P() {
sqlplus -L -s "/ as sysdba" <<EOF | sed -n 's/@ //p'
set echo off lin 9999 trimsp on feedb off head off pages 0 tab off
col name for a25
select '@',ksppinm name,ksppstvl value FROM x\$ksppi join x\$ksppcv using (inst_id,indx) where upper(ksppinm) like upper('%$1%');
EOF
}


so I can check the parameter directly from the shell
$ P shared_pool_size
_io_shared_pool_size 4194304
shared_pool_size 0
__shared_pool_size 83886080


I also use KSH sometimes, there I have a slicly different version of my aliases…