* dlopen.c (dlopen): Return NULL when name is NULL (suggested by

chrisiasci@aol.com).
* cygwin.din: Add a new, internally used export - _check_for_executable.
* dcrt0.cc (dll_crt0_1): Set _check_for_executable for older binaries.  Pass
user_data to premain functions.
* fhandler.cc (fhandler_disk_file::open): Only check for executable if the
linked program is intereested in the executable bit.
(fhandler_disk_file::check_execable_p): Delete.
* fhandler.h (executable_states): New enumeration of various states of
executable bit caring.
(fhandler_base::set_execable_p): New method.
* fhandler_termios.cc (fhandler_termios::line_edit): Flag when a signal has
been sent to the tty.  Return -1 when this is so.
* fhandler_console.cc (fhandler_console::read): Return -1 when signal sending
character encountered.
* path.cc (path_conv::check): Record when path refers to a disk device.  Move
executable extension check here.
(check_sysfile): Accomodate new EXEC path states.
(has_suffix): Remove.
(next_suffix): Remove.
(class suffix_scan): New clas.
(suffix_scan::has): New method.
(suffix_scan:next): New method.
(symlink_info::check): Use suffix_scan method to control for scanning for
suffixes.
* path.h (path_conv::exec_state): New method.
* perprocess.h: Make "C" friendly.
* include/cygwin/version.h: Define CYGWIN_VERSION_CHECK_FOR_S_IEXEC.  Bump
CYGWIN_VERSION_API_MINOR.
* include/sys/cygwin.h: Change premain declarations.
* winsup.h: Move __cplusplus test to after builtin defines.

1 files changed, 4 insertions, 8 deletions

diff --git a/winsup/cygwin/dlfcn.cc b/winsup/cygwin/dlfcn.cc
index 73c44f1..f553ef8 100644
--- a/winsup/cygwin/dlfcn.cc
+++ b/winsup/cygwin/dlfcn.cc
@@ -14,9 +14,9 @@ details. */
 #include <unistd.h>
 #include <ctype.h>
 #include "fhandler.h"
+#include "perprocess.h"
 #include "path.h"
 #include "thread.h"
-#include "perprocess.h"
 #include "dlfcn.h"
 #include "dll_init.h"
 
@@ -166,19 +166,15 @@ dlopen (const char *name, int)
 {
   SetResourceLock(LOCK_DLL_LIST,READ_LOCK|WRITE_LOCK," dlopen");
 
-  void *ret = 0;
+  void *ret;
 
   if (!name)
-    {
-      /* handle for the current module */
-      ret = (void *) GetModuleHandle (NULL);
-    }
+    ret = (void *) GetModuleHandle (NULL); /* handle for the current module */
   else
     {
       /* handle for the named library */
       const char *fullpath = get_full_path_of_dll (name);
-      if (fullpath)
-	ret = (void *) LoadLibrary (fullpath);
+      ret = fullpath ? (void *) LoadLibrary (fullpath) : NULL;
     }
 
   if (!ret)