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@@ -1,19 +1,41 @@
-# Dircount assignment
-## CS426
-
-1 - prints every full pathname
-
-1 - prints a [f] or a [d] next to the path depending on type
-
-1 - counts the total number of files
-
-1 - counts the total number of directories
-
-1 - Never count the same file twice, even if there are links.
-
-1 - does not go into an infinite loop even if the diretcory structure has loops
-
-1 - prints the total on disk space used. (NOT the sum of all the file sizes)
-
--1 - Each day after Wed Oct 26th.
-
+# Dircount assignment
+## CS426
+
+1 - prints every full pathname
+
+1 - prints a [f] or a [d] next to the path depending on type
+
+1 - counts the total number of files
+
+1 - counts the total number of directories
+
+1 - Never count the same file twice, even if there are links.
+
+1 - does not go into an infinite loop even if the diretcory structure has loops
+
+1 - prints the total on disk space used. (NOT the sum of all the file sizes)
+
+-1 - Each day after Wed Oct 26th.
+
+
+There is no way to tell the exact amount of disk space used by a file. However, st_blocks * 512 bytes is a pretty good guess.
+
+The way to detect duplicate entries is to examine the st_ino structure. Each link should print the path name, but should only count once for the totals.
+
+There are hard links and soft links. Soft links are read using readlink. See https://linux.die.net/man/2/readlink.
+
+The article at http://stackoverflow.com/questions/8436841/how-to-recursively-list-directories-in-c-on-linux might be helpful.
+
+You can find the inode number of a file by typing "ls -li filename".
+
+You may assume that no path exceeds 2048 bytes long.
+
+Calling readdir on a link will fail. Use readlink.
+
++ test1 - has a single, empty file.
++ test2 - has a subdir that has a file within it.
++ test3 -- Has two hard links that are the same file.
++ test4 -- Has a loop for directory soft links.
++ test5 -- Has a soft links that points to a normal file.
++ test6 -- Has a link the loops back, and several files scattered around.
++ test7 -- Has a different link loop.
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