From 40570a828e0ed00cf570a2d7fa41ddae887c1367 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Fri, 29 Jun 2007 15:13:01 +0000
Subject: 	* cygwin.din: Export fdopendir. 	* dir.cc (opendir):
 Call fhandler's opendir with fd set to -1. 	(fdopendir): New function. 
 (seekdir64): Use dirent_info_mask. 	(rewinddir): Ditto. 	(closedir):
 Only release underlying file descriptor if it has been 	reserved by
 opendir itself. 	* fhandler.cc (fhandler_base::opendir): Accommodate
 new parameter. 	* fhandler.h (dirent_states): Add dirent_valid_fd and
 dirent_info_mask. 	(fhander_XXX::opendir): Add file descriptor parameter.
  Use regparms. 	(fhandler_procnet::opendir): Drop declaration. 	*
 fhandler_disk_file.cc (fhandler_disk_file::opendir): Ditto. 	If called from
 fdopendir, use existing handle to re-open directory 	with valid flags. 
 Rename fd to cfd.  Use only if no valid incoming fd. 
 (fhandler_cygdrive::opendir): Accommodate new parameter. 	*
 fhandler_process.cc (fhandler_process::opendir): Ditto. 	*
 fhandler_procnet.cc (fhandler_procnet::opendir): Drop definition. 	*
 fhandler_virtual.cc (fhandler_virtual::opendir): Accommodate new 
 parameter.  Only create new file descriptor entry if called from 
 opendir.  Remove duplicated setting of dir->__flags. 	* posix.sgml: Add
 fdopendir to list of implemented Solaris functions. 	*
 include/cygwin/version.h: Bump API minor number. 	*
 include/sys/dirent.h: Declare fdopendir.

---
 winsup/cygwin/dir.cc | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

(limited to 'winsup/cygwin/dir.cc')

diff --git a/winsup/cygwin/dir.cc b/winsup/cygwin/dir.cc
index 3d0dbae7b..2ce0488c5 100644
--- a/winsup/cygwin/dir.cc
+++ b/winsup/cygwin/dir.cc
@@ -61,7 +61,7 @@ opendir (const char *name)
   if (!fh)
     res = NULL;
   else if (fh->exists ())
-    res = fh->opendir ();
+    res = fh->opendir (-1);
   else
     {
       set_errno (ENOENT);
@@ -73,6 +73,17 @@ opendir (const char *name)
   return res;
 }
 
+extern "C" DIR *
+fdopendir (int fd)
+{
+  DIR *res = NULL;
+
+  cygheap_fdget cfd (fd);
+  if (cfd >= 0)
+    res = cfd->opendir (fd);
+  return res;
+}
+
 static int
 readdir_worker (DIR *dir, dirent *de)
 {
@@ -204,7 +215,7 @@ seekdir64 (DIR *dir, _off64_t loc)
 
   if (dir->__d_cookie != __DIRENT_COOKIE)
     return;
-  dir->__flags &= (dirent_isroot | dirent_get_d_ino | dirent_set_d_ino);
+  dir->__flags &= dirent_info_mask;
   return ((fhandler_base *) dir->__fh)->seekdir (dir, loc);
 }
 
@@ -225,7 +236,7 @@ rewinddir (DIR *dir)
 
   if (dir->__d_cookie != __DIRENT_COOKIE)
     return;
-  dir->__flags &= (dirent_isroot | dirent_get_d_ino | dirent_set_d_ino);
+  dir->__flags &= dirent_info_mask;
   return ((fhandler_base *) dir->__fh)->rewinddir (dir);
 }
 
@@ -249,7 +260,11 @@ closedir (DIR *dir)
 
   int res = ((fhandler_base *) dir->__fh)->closedir (dir);
 
-  cygheap->fdtab.release (dir->__d_fd);
+  /* If the directory has been opened by fdopendir, the descriptor
+     entry is used elsewhere in the application and must not be removed
+     from the descriptor table. */
+  if (!(dir->__flags & dirent_valid_fd))
+    cygheap->fdtab.release (dir->__d_fd);
 
   free (dir->__d_dirname);
   free (dir->__d_dirent);
-- 
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