* dcrt0.cc (dll_crt0_1): Move cxx_malloc reset kluge from here.

(check_sanity_and_sync): to here.
* path.cc (has_dot_last_component): Rewrite to detect some corner cases that
were previously uncaught.

3 files changed, 42 insertions, 23 deletions

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index a74484e..0ecfb5f 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,13 @@
+2009-10-02  Christopher Faylor  <me+cygwin@cgf.cx>
+
+	* dcrt0.cc (dll_crt0_1): Move cxx_malloc reset kluge from here.
+	(check_sanity_and_sync):  to here.
+
+2009-09-30  Christopher Faylor  <me+cygwin@cgf.cx>
+
+	* path.cc (has_dot_last_component): Rewrite to detect some corner cases
+	that were previously uncaught.
+
 2009-09-30  Corinna Vinschen  <corinna@vinschen.de>
 
 	* fhandler_console.cc (beep): Move up to avoid forward declaration.
diff --git a/winsup/cygwin/dcrt0.cc b/winsup/cygwin/dcrt0.cc
index e142b74..6e41292 100644
--- a/winsup/cygwin/dcrt0.cc
+++ b/winsup/cygwin/dcrt0.cc
@@ -375,6 +375,12 @@ check_sanity_and_sync (per_process *p)
   if (p->api_major > cygwin_version.api_major)
     api_fatal ("cygwin DLL and APP are out of sync -- API version mismatch %d > %d",
 	       p->api_major, cygwin_version.api_major);
+
+  /* This is a kludge to work around a version of _cygwin_common_crt0
+     which overwrote the cxx_malloc field with the local DLL copy.
+     Hilarity ensues if the DLL is not loaded while the process
+     is forking. */
+  __cygwin_user_data.cxx_malloc = &default_cygwin_cxx_malloc;
 }
 
 child_info NO_COPY *child_proc_info = NULL;
@@ -766,12 +772,6 @@ dll_crt0_1 (void *)
     sigproc_init ();
   check_sanity_and_sync (user_data);
 
-  /* This is a kludge to work around a version of _cygwin_common_crt0
-     which overwrote the cxx_malloc field with the local DLL copy.
-     Hilarity ensues if the DLL is not loaded like while the process
-     is forking. */
-  __cygwin_user_data.cxx_malloc = &default_cygwin_cxx_malloc;
-
   /* Initialize malloc and then call user_shared_initialize since it relies
      on a functioning malloc and it's possible that the user's program may
      have overridden malloc.  We only know about that at this stage,
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index e543dd4..7e89cb0 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -203,23 +203,32 @@ has_dot_last_component (const char *dir, bool test_dot_dot)
   /* SUSv3: . and .. are not allowed as last components in various system
      calls.  Don't test for backslash path separator since that's a Win32
      path following Win32 rules. */
-  const char *last_comp = strrchr (dir, '/');
-  if (!last_comp)
-    last_comp = dir;
-  else {
-    /* Check for trailing slash.  If so, hop back to the previous slash. */
-    if (!last_comp[1])
-      while (last_comp > dir)
-	if (*--last_comp == '/')
-	  break;
-    if (*last_comp == '/')
-      ++last_comp;
-  }
-  return last_comp[0] == '.'
-	 && ((last_comp[1] == '\0' || last_comp[1] == '/')
-	     || (test_dot_dot
-		 && last_comp[1] == '.'
-		 && (last_comp[2] == '\0' || last_comp[2] == '/')));
+  const char *last_comp = strchr (dir, '\0');
+
+  if (last_comp == dir)
+    return false;	/* Empty string.  Probably shouldn't happen here? */
+
+  /* Detect run of trailing slashes */
+  while (last_comp > dir && *--last_comp == '/')
+    continue;
+
+  /* Detect just a run of slashes or a path that does not end with a slash. */
+  if (*last_comp != '.')
+    return false;
+
+  /* We know we have a trailing dot here.  Check that it really is a standalone "."
+     path component by checking that it is at the beginning of the string or is
+     preceded by a "/" */
+  if (last_comp == dir || *--last_comp == '/')
+    return true;
+
+  /* If we're not checking for '..' we're done.  Ditto if we're now pointing to
+     a non-dot. */
+  if (!test_dot_dot || *last_comp != '.')
+    return false;		/* either not testing for .. or this was not '..' */
+
+  /* Repeat previous test for standalone or path component. */
+  return last_comp == dir || last_comp[-1] == '/';
 }
 
 /* Normalize a POSIX path.