[Rdiff-backup-commits] Changes to rdiff-backup/rdiff_backup/fs_abilities.py

[Ben Escoto]

Index: rdiff-backup/rdiff_backup/fs_abilities.py
diff -u rdiff-backup/rdiff_backup/fs_abilities.py:1.17 
rdiff-backup/rdiff_backup/fs_abilities.py:1.18
--- rdiff-backup/rdiff_backup/fs_abilities.py:1.17      Thu Oct 20 20:20:29 2005
+++ rdiff-backup/rdiff_backup/fs_abilities.py   Fri Oct 21 02:27:33 2005
@@ -28,11 +28,12 @@
 """
 
 import errno, os
-import Globals, log, TempFile, selection
+import Globals, log, TempFile, selection, robust
 
 class FSAbilities:
        """Store capabilities of given file system"""
        chars_to_quote = None # Hold characters not allowable in file names
+       case_sensitive = None # True if "foobar" and "FoObAr" are different 
files
        ownership = None # True if chown works on this filesystem
        acls = None # True if access control lists supported
        eas = None # True if extended attributes supported
@@ -94,6 +95,7 @@
                                                          ('High-bit 
permissions', self.high_perms)])
                add_boolean_list([('Access control lists', self.acls),
                                                  ('Extended attributes', 
self.eas),
+                                                 ('Case sensitivity', 
self.case_sensitive),
                                                  ('Mac OS X style resource 
forks',
                                                   self.resource_forks),
                                                  ('Mac OS X Finder 
information', self.carbonfile)])
@@ -117,6 +119,7 @@
                self.set_acls(rp)
                self.set_resource_fork_readonly(rp)
                self.set_carbonfile()
+               self.set_case_sensitive_readonly(rp)
                return self
 
        def init_readwrite(self, rbdir, use_ctq_file = 1,
@@ -233,10 +236,11 @@
                                lower_a.delete()
                                upper_a.setdata()
                                assert not upper_a.lstat()
-                               return 0
+                               self.case_sensitive = 0
                        else:
                                upper_a.delete()
-                               return 1
+                               self.case_sensitive = 1
+                       return self.case_sensitive
 
                def supports_unusual_chars():
                        """Test handling of several chars sometimes not 
supported"""
@@ -285,7 +289,50 @@
                        log.Log("ACLs not supported by filesystem at %s" % 
(rp.path,), 4)
                        self.acls = 0
                else: self.acls = 1
-               
+
+       def set_case_sensitive_readonly(self, rp):
+               """Determine if directory at rp is case sensitive without 
writing"""
+               def find_letter(subdir):
+                       """Find a (subdir_rp, dirlist) with a letter in it, or 
None
+
+                       Recurse down the directory, looking for any file that 
has
+                       a letter in it.  Return the pair (rp, [list of 
filenames])
+                       where the list is of the directory containing rp.
+
+                       """
+                       l = robust.listrp(subdir)
+                       for filename in l:
+                               if filename != filename.swapcase():
+                                       return (subdir, l, filename)
+                       for filename in l:
+                               dir_rp = subdir.append(filename)
+                               if dir_rp.isdir():
+                                       subsearch = find_letter(dir_rp)
+                                       if subsearch: return subsearch
+                       return None
+
+               def test_triple(dir_rp, dirlist, filename):
+                       """Return 1 if filename shows system case sensitive"""
+                       letter_rp = dir_rp.append(filename)
+                       assert letter_rp.lstat(), letter_rp
+                       swapped = filename.swapcase()
+                       if swapped in dirlist: return 1
+
+                       swapped_rp = dir_rp.append(swapped)
+                       if swapped_rp.lstat(): return 0
+                       return 1
+
+               triple = find_letter(rp)
+               if not triple:
+                       log.Log("Warning: could not determine case sensitivity 
of "
+                                       "source directory at\n  " + rp.path + 
"\n"
+                                       "because we can't find any files with 
letters in them.\n"
+                                       "It will be treated as case 
sensitive.", 2)
+                       self.case_sensitive = 1
+                       return
+
+               self.case_sensitive = test_triple(*triple)
+
        def set_eas(self, rp, write):
                """Set extended attributes from rp. Tests writing if write is 
true."""
                assert Globals.local_connection is rp.conn