* Lib/linecache.py: don't crash on empty filename

* Lib/macpath.py: don't return trailing colon for dirname()
	(XXX won't do for volume names -- but otherwise glob(':*:*.py')
	loops forever)
	* Lib/traceback.py: print SyntaxError correctly
	* Lib/stat.py: moved to posixstat.py; added macstat.py which has
	the constants for the Mac; and created new stat.py which includes
	the right one
	* Lib/urllib.py: fix caching bug (by disabling the cache)

Lib/macstat.py

@@ -0,0 +1,83 @@
+# Module 'stat'
+#
+# Defines constants and functions for interpreting stat/lstat struct
+# as returned by os.stat() and os.lstat() (if it exists).
+#
+# Suggested usage: from stat import *
+#
+# XXX Strictly spoken, this module may have to be adapted for each POSIX
+# implementation; in practice, however, the numeric constants used by
+# stat() are almost universal (even for stat() emulations on non-UNIX
+# systems like MS-DOS).
+
+# Indices for stat struct members in tuple returned by os.stat()
+
+ST_MODE  = 0
+ST_INO   = 1
+ST_DEV   = 2
+ST_NLINK = 3
+ST_UID   = 4
+ST_GID   = 5
+ST_SIZE  = 6
+ST_ATIME = 7
+ST_MTIME = 8
+ST_CTIME = 9
+
+# Extract bits from the mode
+
+def S_IMODE(mode):
+	return 0
+
+def S_IFMT(mode):
+	return mode & 0xFFFF
+
+# Constants used as S_IFMT() for various file types
+# (not all are implemented on all systems)
+
+S_IFDIR  = 0x0000
+S_IFREG  = 0x0003
+
+# Functions to test for each file type
+
+def S_ISDIR(mode):
+	return S_IFMT(mode) == S_IFDIR
+
+def S_ISCHR(mode):
+	return 0
+
+def S_ISBLK(mode):
+	return 0
+
+def S_ISREG(mode):
+	return S_IFMT(mode) == S_IFREG
+
+def S_ISFIFO(mode):
+	return 0
+
+def S_ISLNK(mode):
+	return 0
+
+def S_ISSOCK(mode):
+	return 0
+
+# Names for permission bits
+
+S_ISUID = 04000
+S_ISGID = 02000
+S_ENFMT = S_ISGID
+S_ISVTX = 01000
+S_IREAD = 00400
+S_IWRITE = 00200
+S_IEXEC = 00100
+S_IRWXU = 00700
+S_IRUSR = 00400
+S_IWUSR = 00200
+S_IXUSR = 00100
+S_IRWXG = 00070
+S_IRGRP = 00040
+S_IWGRP = 00020
+S_IXGRP = 00010
+S_IRWXO = 00007
+S_IROTH = 00004
+S_IWOTH = 00002
+S_IXOTH = 00001