* include/cygwin/version.h: Bump API minor number to 151.

* dir.cc (__opendir_with_d_ino): New function.
(opendir): Set flag if we should be calculating inodes.
(readdir_worker): Calculate d_ino by calling stat if the user has asked for it.
(seekdir64): Maintain all persistent flag settings.
* fhandler.h (dirent_states): Add dirent_set_d_ino.
* fhandler_disk_file.cc (fhandler_disk_file::opendir): Reflect changes to
dirent structure.
* fhandler_virtual.cc (fhandler_virtual::opendir): Ditto.
* include/sys/dirent.h (struct dirent): Coalesce two similar structures.
Remove all threads of the apparently highly confusing references to inodes.
Add support for calculating a real inode if __USE_EXPENSIVE_CYGWIN_D_INO is
defined.

8 files changed, 75 insertions, 74 deletions

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 38d2631..37ccebf 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,5 +1,22 @@
 2006-01-20  Christopher Faylor  <cgf@timesys.com>
 
+	* include/cygwin/version.h: Bump API minor number to 151.
+	* dir.cc (__opendir_with_d_ino): New function.
+	(opendir): Set flag if we should be calculating inodes.
+	(readdir_worker): Calculate d_ino by calling stat if the user has asked
+	for it.
+	(seekdir64): Maintain all persistent flag settings.
+	* fhandler.h (dirent_states): Add dirent_set_d_ino.
+	* fhandler_disk_file.cc (fhandler_disk_file::opendir): Reflect changes
+	to dirent structure.
+	* fhandler_virtual.cc (fhandler_virtual::opendir): Ditto.
+	* include/sys/dirent.h (struct dirent): Coalesce two similar
+	structures.  Remove all threads of the apparently highly confusing
+	references to inodes.  Add support for calculating a real inode if
+	__USE_EXPENSIVE_CYGWIN_D_INO is defined.
+
+2006-01-20  Christopher Faylor  <cgf@timesys.com>
+
 	* include/sys/dirent.h: Add comments for people who are REALLY confused
 	about whether they should be using something called __invalid_d_ino or
 	not.
diff --git a/winsup/cygwin/cygwin.din b/winsup/cygwin/cygwin.din
index 5efc6fd..770923d 100644
--- a/winsup/cygwin/cygwin.din
+++ b/winsup/cygwin/cygwin.din
@@ -993,7 +993,7 @@ open SIGFE
 _open = open SIGFE
 _open64
 opendir SIGFE
-_opendir = opendir SIGFE
+__opendir_with_d_ino SIGFE
 openlog SIGFE
 _openlog = openlog SIGFE
 openpty SIGFE
diff --git a/winsup/cygwin/dir.cc b/winsup/cygwin/dir.cc
index 14f02d9..403b557 100644
--- a/winsup/cygwin/dir.cc
+++ b/winsup/cygwin/dir.cc
@@ -39,7 +39,16 @@ dirfd (DIR *dir)
       syscall_printf ("-1 = dirfd (%p)", dir);
       return -1;
     }
-  return dir->__d_dirent->d_fd;
+  return dir->__d_fd;
+}
+
+extern "C" DIR *
+__opendir_with_d_ino (const char *name)
+{
+  DIR *res = opendir (name);
+  if (res)
+    res->__flags |= dirent_set_d_ino;
+  return res;
 }
 
 /* opendir: POSIX 5.1.2.1 */
@@ -61,7 +70,7 @@ opendir (const char *name)
     }
 
   if (res)
-    /* nothing */;
+    res->__flags |= CYGWIN_VERSION_CHECK_FOR_NEEDS_D_INO ? dirent_set_d_ino : 0;
   else if (fh)
     delete fh;
   return res;
@@ -100,58 +109,36 @@ readdir_worker (DIR *dir, dirent *de)
 	}
     }
 
-  if (res)
-    /* error return */;
-  else if (!CYGWIN_VERSION_CHECK_FOR_NEEDS_D_INO)
-    {
-      de->__invalid_d_ino = (ino_t) -1;
-      de->__invalid_ino32 = (uint32_t) -1;
-      if (de->d_name[0] == '.')
-	{
-	  if (de->d_name[1] == '\0')
-	     dir->__flags |= dirent_saw_dot;
-	   else if (de->d_name[1] == '.' && de->d_name[2] == '\0')
-	     dir->__flags |= dirent_saw_dot_dot;
-	 }
-    }
-  else
+  if (!res)
     {
       /* Compute d_ino by combining filename hash with the directory hash
 	 (which was stored in dir->__d_dirhash when opendir was called). */
-      if (de->d_name[0] == '.')
+      if (de->d_name[0] != '.')
+	/* relax */;
+      else if (de->d_name[1] == '\0')
+	dir->__flags |= dirent_saw_dot;
+      else if (de->d_name[1] == '.' && de->d_name[2] == '\0')
+	dir->__flags |= dirent_saw_dot_dot;
+      if (!(dir->__flags & dirent_set_d_ino))
+	de->__dirent_internal = 0;
+      else
 	{
-	  if (de->d_name[1] == '\0')
-	    {
-	      de->__invalid_d_ino = dir->__d_dirhash;
-	      dir->__flags |= dirent_saw_dot;
-	    }
-	  else if (de->d_name[1] != '.' || de->d_name[2] != '\0')
-	    goto hashit;
+	  size_t len = strlen (dir->__d_dirname) + strlen (de->d_name);
+	  char *path = (char *) alloca (len);
+	  char *p = strchr (strcpy (path, dir->__d_dirname), '\0');
+	  strcpy (p - 1, de->d_name);
+	  struct __stat64 st;
+	  if (lstat64 (path, &st) == 0)
+	    de->__dirent_internal = st.st_ino;
 	  else
 	    {
-	      dir->__flags |= dirent_saw_dot_dot;
-	      char *p, up[strlen (dir->__d_dirname) + 1];
-	      strcpy (up, dir->__d_dirname);
-	      if (!(p = strrchr (up, '\\')))
-		goto hashit;
-	      *p = '\0';
-	      if (!(p = strrchr (up, '\\')))
-		de->__invalid_d_ino = hash_path_name (0, ".");
-	      else
-		{
-		  *p = '\0';
-		  de->__invalid_d_ino = hash_path_name (0, up);
-		}
+	      de->__dirent_internal = hash_path_name (0, dir->__d_dirname);
+	      de->__dirent_internal = hash_path_name (de->__dirent_internal, de->d_name);
 	    }
 	}
-      else
-	{
-      hashit:
-	  __ino64_t dino = hash_path_name (dir->__d_dirhash, "\\");
-	  de->__invalid_d_ino = hash_path_name (dino, de->d_name);
-	}
-      de->__invalid_ino32 = de->__invalid_d_ino;	// for legacy applications
+      de->__dirent_internal1 = de->__dirent_internal;
     }
+
   return res;
 }
 
@@ -210,7 +197,7 @@ seekdir64 (DIR *dir, _off64_t loc)
 
   if (dir->__d_cookie != __DIRENT_COOKIE)
     return;
-  dir->__flags &= dirent_isroot;
+  dir->__flags &= (dirent_isroot | dirent_set_d_ino);
   return ((fhandler_base *) dir->__fh)->seekdir (dir, loc);
 }
 
@@ -255,7 +242,7 @@ closedir (DIR *dir)
 
   int res = ((fhandler_base *) dir->__fh)->closedir (dir);
 
-  cygheap->fdtab.release (dir->__d_dirent->d_fd);
+  cygheap->fdtab.release (dir->__d_fd);
 
   free (dir->__d_dirname);
   free (dir->__d_dirent);
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index 462a62a..525e37c 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -47,7 +47,8 @@ enum dirent_states
   dirent_isroot		= 0x0008,
   dirent_saw_cygdrive	= 0x0010,
   dirent_saw_dev	= 0x0020,
-  dirent_saw_proc	= 0x0040
+  dirent_saw_proc	= 0x0040,
+  dirent_set_d_ino	= 0x0080
 };
 
 enum conn_state
diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc
index 7243d59..ce0738b 100644
--- a/winsup/cygwin/fhandler_disk_file.cc
+++ b/winsup/cygwin/fhandler_disk_file.cc
@@ -1359,7 +1359,7 @@ fhandler_disk_file::opendir ()
   else
     {
       strcpy (dir->__d_dirname, get_win32_name ());
-      dir->__d_dirent->d_version = __DIRENT_VERSION;
+      dir->__d_dirent->__d_version = __DIRENT_VERSION;
       cygheap_fdnew fd;
 
       if (fd < 0)
@@ -1367,7 +1367,7 @@ fhandler_disk_file::opendir ()
 
       fd = this;
       fd->nohandle (true);
-      dir->__d_dirent->d_fd = fd;
+      dir->__d_fd = fd;
       dir->__fh = this;
       /* FindFirstFile doesn't seem to like duplicate /'s. */
       len = strlen (dir->__d_dirname);
@@ -1378,7 +1378,6 @@ fhandler_disk_file::opendir ()
       dir->__d_cookie = __DIRENT_COOKIE;
       dir->__handle = INVALID_HANDLE_VALUE;
       dir->__d_position = 0;
-      dir->__d_dirhash = get_namehash ();
 
       res = dir;
       dir->__flags = (pc.normalized_path[0] == '/' && pc.normalized_path[1] == '\0') ? dirent_isroot : 0;
diff --git a/winsup/cygwin/fhandler_virtual.cc b/winsup/cygwin/fhandler_virtual.cc
index 414d5c8..98620f4 100644
--- a/winsup/cygwin/fhandler_virtual.cc
+++ b/winsup/cygwin/fhandler_virtual.cc
@@ -71,18 +71,18 @@ fhandler_virtual::opendir ()
   else
     {
       strcpy (dir->__d_dirname, get_name ());
-      dir->__d_dirent->d_version = __DIRENT_VERSION;
+      dir->__d_dirent->__d_version = __DIRENT_VERSION;
       cygheap_fdnew fd;
       if (fd >= 0)
 	{
 	  fd = this;
 	  fd->nohandle (true);
-	  dir->__d_dirent->d_fd = fd;
+	  dir->__d_fd = fd;
 	  dir->__fh = this;
 	  dir->__d_cookie = __DIRENT_COOKIE;
 	  dir->__handle = INVALID_HANDLE_VALUE;
 	  dir->__d_position = 0;
-	  dir->__d_dirhash = get_namehash ();
+	  // dir->__d_dirhash = get_namehash ();
 	  dir->__flags = dirent_saw_dot | dirent_saw_dot_dot;
 	  res = dir;
 	  res->__flags = 0;
diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index c7bba50..797dd37 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -286,12 +286,13 @@ details. */
       148: Add open(2) flags O_SYNC, O_RSYNC, O_DSYNC and O_DIRECT.
       149: Add open(2) flag O_NOFOLLOW.
       150: Export getsubopt.
+      151: Export __opendir_with_d_ino
      */
 
      /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 150
+#define CYGWIN_VERSION_API_MINOR 151
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible
diff --git a/winsup/cygwin/include/sys/dirent.h b/winsup/cygwin/include/sys/dirent.h
index b17c2e9..511fbb3 100644
--- a/winsup/cygwin/include/sys/dirent.h
+++ b/winsup/cygwin/include/sys/dirent.h
@@ -16,27 +16,16 @@
 #define __DIRENT_VERSION	2
 
 #pragma pack(push,4)
-#ifdef __INSIDE_CYGWIN__
+#if defined(__INSIDE_CYGWIN__) || defined (__CYGWIN_USE_BIG_TYPES__)
 struct dirent
 {
-  long d_version;			/* Used since Cygwin 1.3.3. */
-  __ino64_t __invalid_d_ino;		/* DO NOT USE: No longer available since cygwin 1.5.19 */
-  long d_fd;				/* File descriptor of open directory.
-					   Used since Cygwin 1.3.3. */
-  unsigned __invalid_ino32;		/* DO NOT USE: No longer available since cygwin 1.5.19 */
+  long __d_version;			/* Used internally */
+  __ino64_t __dirent_internal;
+  __uint32_t __dirent_unused1;
+  __uint32_t __dirent_internal1;
   char d_name[256];			/* FIXME: use NAME_MAX? */
 };
 #else
-#ifdef __CYGWIN_USE_BIG_TYPES__
-struct dirent
-{
-  long d_version;
-  ino_t __invalid_d_ino;		/* DO NOT USE: No longer available since cygwin 1.5.19 */
-  long d_fd;
-  unsigned long __invalid_ino32;	/* DO NOT USE: No longer available since cygwin 1.5.19 */
-  char d_name[256];
-};
-#else
 struct dirent
 {
   long d_version;
@@ -46,7 +35,6 @@ struct dirent
   char d_name[256];
 };
 #endif
-#endif
 #pragma pack(pop)
 
 #define __DIRENT_COOKIE 0xdede4242
@@ -59,14 +47,22 @@ typedef struct __DIR
   struct dirent *__d_dirent;
   char *__d_dirname;			/* directory name with trailing '*' */
   _off_t __d_position;			/* used by telldir/seekdir */
-  __ino64_t __d_dirhash;		/* hash of directory name for use by readdir */
+  int __d_fd;
+  unsigned __d_unused;
   void *__handle;
   void *__fh;
   unsigned __flags;
 } DIR;
 #pragma pack(pop)
 
+#ifndef __USE_EXPENSIVE_CYGWIN_D_INO
 DIR *opendir (const char *);
+#else
+#define d_ino __dirent_internal
+DIR *__opendir_with_d_ino (const char *);
+#define opendir __opendir_with_d_ino
+#endif
+
 struct dirent *readdir (DIR *);
 int readdir_r (DIR *, struct dirent *, struct dirent **);
 void rewinddir (DIR *);