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Old 09-28-2006
Dhruva's Avatar
Dhruva Dhruva is offline
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Join Date: Mar 2006
Location: India
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{} is used for building strings.

Code:
FILE = 'basename $1'

the above line of code is taking first parameter passed to this script as argument.what basename command will do here is if you have given the filename with path like /abc/dir1/dir2/filename then the
Value of FILE that is $FILE will have value "filename".

Code:
BANK = 'dirname $1'

the above command will remove the filename and assign path of file to BANK.
BANK will be "/abc/dir1/dir2/"

Code:
INFILE = ${FILE}.${BANK}.$$

Now the INFILE will have value "filename./abc/dir1/dir2/.3456"
here $$ gives the process id. in unix each command will run as a process and generates id.and value of $$ may differ in each run.