s-fileio.adb (Open): When file open operation fails...

2008-08-06  Thomas Quinot  <quinot@adacore.com>

	* s-fileio.adb (Open): When file open operation fails, raise Name_Error
	only when the operating system reports a non-existing file or directory
	(ENOENT), otherwise raise Name_Error.

From-SVN: r138786

gcc/ada/ChangeLog

 2008-08-06  Thomas Quinot  <quinot@adacore.com>
 
+	* sem_res.adb: Minor reformatting
+
+	* s-fileio.adb (Open): When file open operation fails, raise Name_Error
+	only when the operating system reports a non-existing file or directory
+	(ENOENT), otherwise raise Name_Error.
+
+	* exp_ch11.adb: Minor reformatting
+
+2008-08-06  Ed Schonberg  <schonberg@adacore.com>
+
+	* sem_ch3.adb (Access_Subprogram_Declaration): If the return type is
+	incomplete, add the access_to_subprogram type to the list of private
+	dependents only if the incomplete type will be completed in the current
+	scope.
+	(Build_Discriminant_Constraints): If the type of the discriminant is
+	access_to_variable, reject a constraint that is access_to_constant.
+
+2008-08-06  Thomas Quinot  <quinot@adacore.com>
+
 	* g-socket-dummy.adb, g-socket-dummy.ads, g-sothco-dummy.adb,
 	g-sothco-dummy.ads, g-socthi-dummy.adb, g-socthi-dummy.ads,
 	g-sttsne-dummy.ads: New files.

gcc/ada/s-fileio.adb

@@ -33,10 +33,13 @@
 
 with Ada.Finalization;            use Ada.Finalization;
 with Ada.IO_Exceptions;           use Ada.IO_Exceptions;
+with Interfaces.C;
 with Interfaces.C_Streams;        use Interfaces.C_Streams;
 
 with System.CRTL;
 with System.Case_Util;            use System.Case_Util;
+with System.OS_Constants;
+with System.OS_Lib;
 with System.Soft_Links;
 
 with Ada.Unchecked_Deallocation;
@@ -47,6 +50,7 @@ package body System.File_IO is
 
    package SSL renames System.Soft_Links;
 
+   use type Interfaces.C.int;
    use type System.CRTL.size_t;
 
    ----------------------
@@ -984,7 +988,11 @@ package body System.File_IO is
             Stream := fopen (Namestr'Address, Fopstr'Address, Encoding);
 
             if Stream = NULL_Stream then
-               if not Tempfile and then file_exists (Namestr'Address) = 0 then
+               --  Raise Name_Error if trying to open a non-existent file.
+               --  Otherwise raise Use_Error. Should we raise Device_Error for
+               --  ENOSPC???
+
+               if System.OS_Lib.Errno = System.OS_Constants.ENOENT then
                   raise Name_Error;
                else
                   raise Use_Error;