Message-Id:	<3.0.1.32.19971201081956.007f8330@yacker.xiotech.com>
Date:	Mon, 01 Dec 1997 08:19:56 -0600
To:	djgpp-workers AT delorie DOT com
From:	Randy Maas <randym AT acm DOT org>
Subject:	Patch to fsext.c to go with the exit.c patch
Mime-Version:	1.0

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This patch is relative the fsext.c patch posted 12/1/1997.  It adds a
simple function to be called during exit.

Randy 
randym AT acm DOT org
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*** src/libc/fsext/fsext.c~1	Mon Dec  1 07:49:10 1997
--- src/libc/fsext/fsext.c	Mon Dec  1 08:09:52 1997
***************
*** 30,33 ****
--- 30,36 ----
  static __FSEXT_func_rec *func_list;
  
+ extern void (*__FSEXT_exit_hook)(void);
+ static void __FSEXT_close_all(void);
+ 
  static void
  init(void)
***************
*** 39,42 ****
--- 42,48 ----
    num_fds = 0;
    func_list = 0;
+ 
+   /* Attach our hook to close all of the remaining open extensions. */
+   __FSEXT_exit_hook = __FSEXT_close_all;
  }
  
***************
*** 104,105 ****
--- 110,133 ----
    return 1;
  }
+ 
+ /*
+    This is an exit helper routine.  This should be called *after* all of the
+    other IO in libc has been closed -- that is, so that anything will opened
+    with fopen can be fclose'd.
+ 
+    Other note: *If* a fsext uses a fopen'd file, it gets in a race condition
+    at exit.  That is, the file the fsext fopen'd may be closed before the
+    fsext.  This is more of a bug with *bad* programs not good ones.
+  */
+ 
+ static void
+ __FSEXT_close_all (void)
+ {
+   int I;
+ 
+   if (!func_list) return;
+   for (I = 0; I < num_fds; I++)
+    if (func_list[I].func)
+      close(I);
+ }
+ 

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