* 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, 12 insertions, 4 deletions

diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index 73aa294a6..3196f2114 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -130,6 +130,14 @@ enum bg_check_types
   bg_signalled = 2
 };
 
+enum executable_states
+{
+  is_executable,
+  not_executable,
+  dont_care_if_executable,
+  dont_know_if_executable
+};
+
 class fhandler_base
 {
 private:
@@ -219,7 +227,10 @@ public:
   void set_socket_p () { FHSETF (LOCAL); }
 
   int get_execable_p () { return FHISSETF (EXECABL); }
-  void set_execable_p (int val) { FHCONDSETF (val, EXECABL); }
+  void set_execable_p (executable_states val)
+  {
+    FHCONDSETF (val == is_executable, EXECABL);
+  }
   void set_execable_p () { FHSETF (EXECABL); }
 
   int get_append_p () { return FHISSETF (APPEND); }
@@ -477,9 +488,6 @@ private:
 
 class fhandler_disk_file: public fhandler_base
 {
-private:
-  int check_execable_p (const char *path);
-
 public:
   fhandler_disk_file (const char *name);