Hello Dynandev,
A couple of things some of which have already been covered.
1. Running stuff like SWPM out of /tmp is never a good idea.
2. SWPM can't find the file CONTROL.SQL. As already pointed out this is UPPERCASE.
Try the following to see if you can find the file.
$ cd /tmp
$ find . -name CONTROL.SQL
3. You have tried to start the DB and clearly you have a problem identifying control files which one could reasonably assume would have been created by the CONTROL.SQL.
Try and find any file that contains the statement "create controlfile"
$ cd /tmp
$ find . -type f -exec grep -il "CREATE CONTROLFILE" {} \;
Please come back with the info from the above. In the worst case you'll have to manually create the controlfile.
KR,
Amerjit