Fixes root directory creation in Windows.

HISTORY

@@ -22,6 +22,15 @@ SnapRAID HISTORY
    directory tree.
  * Changes the 'dup' output format to include the size of each duplicate file.
 
+3.2 2013/7
+==========
+ * Fix a directory creation problem in Windows when the "disk" option points to
+   the root directory of a drive. Now SnapRAID won't complain about the
+   inability to create such directory.
+   If you encouter this problem when trying to recover your data, just upgrade
+   to this version, and you'll be able to complete the recovering process.
+   No need to upgrade for platforms different from Windows.
+
 3.1 2013/5
 ==========
  * Direct use of Windows API for disk access to improve error reporting.

TODO

@@ -5,6 +5,8 @@ This is the list of TODO items for SnapRAID.
 
 - v4.0
 
+* Don't enforce different disk in fix. It could allow to recover in spare space of a disk already used.
+
 * In the import list, uses also all the blocks in the array.
 But we must cover the case of bad blocks. Likely we can just check the
 hash after reading, and in case, skip it, and retry with another copy.

util.c

@@ -687,9 +687,9 @@ int mkancestor(const char* file)
 {
 	char dir[PATH_MAX];
 	char* c;
-	
+
 	pathcpy(dir, sizeof(dir), file);
-	
+
 	c = strrchr(dir, '/');
 	if (!c) {
 		/* no ancestor */
@@ -699,11 +699,20 @@ int mkancestor(const char* file)
 	/* clear the file */
 	*c = 0;
 
+	/* if it's the root dir */
 	if (*dir == 0) {
 		/* nothing more to do */
 		return 0;
 	}
 
+#ifdef _WIN32
+	/* if it's a drive specificaion like "C:" */
+	if (isalpha(dir[0]) && dir[1] == ':' && dir[2] == 0) {
+		/* nothing more to do */
+		return 0;
+	}
+#endif
+
 	/* try creating it  */
 	if (mkdir(dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == 0) {
 		/* just created */