Dear Monks - I have been trying to get an perl algorithm or a proper logic to start my goal(below).I have tried various ways to achieve this with but no luck,vexed of it.I want to start all -over again from the scratch.Really appreciate if the monks help me to formulate a right logic in perl for each step below ?

1.I have a file data.txt which has list of all directory names

2.Now I want to grep every dir name in data.txt  with the contents of 
+all the  *.c files in the cwd recursively .

3.Now report only those files and the matching lines whose grep is
case-sensitive meaning if we grep for "modem" in all the contents of *
+.c,any .c file which has a different case other than "modem",meaning 
+Modem,moDEM etc,all such .c files need to be printed along with the m
+atchingline
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