From 5a64d8694176dbe7bd0c61c33d6e6cecd54d7a71 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Sat, 24 Nov 2001 03:11:39 +0000
Subject: * dtable.cc (dtable::vfork_parent_restore): Add debugging statement.
 * exceptions.cc (try_to_debug): Spin only as long as we don't have a debugger
 attached. * fhandler.h (fhandler_base::set_nohandle): New method.
 (fhandler_base::get_nohandle): New method. * fhandler.cc
 (fhandler_base::dup): Avoid duplicating handle if there is no handle. *
 fhandler_disk_file.cc (fhandler_disk_file::opendir): Set nohandle flag on
 dummy fd. * Makefile.in: Make intermediate library for eventual inclusion in
 libcygwin.a * fhandler.h (fhandler_pipe::fhandler_pipe): Remove default
 argument setting since it is no longer used. * miscfuncs.cc (check_null_str):
 New function. (+check_null_str_errno): Ditto. * net.cc: Add defensive buffer
 checking throughout. (cygwin_sendto): Protect against invalid fd.
 (cygwin_recvfrom): Ditto. (cygwin_getpeername): Ditto. (cygwin_recv): Ditto.
 (cygwin_send): Ditto. * winsup.h: Declare a new function. * select.cc
 (set_bits): Fix conditional for setting fd in exceptfds. * dtable.cc
 (dtable::build_fhandler): Create fhandler_pipe using correct device type. *
 path.cc (get_devn): Set correct pipe device type from device name.

---
 winsup/cygwin/miscfuncs.cc | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

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

diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc
index 4d72339cb..6cc03a669 100644
--- a/winsup/cygwin/miscfuncs.cc
+++ b/winsup/cygwin/miscfuncs.cc
@@ -115,6 +115,15 @@ strcasestr (const char *searchee, const char *lookfor)
   return NULL;
 }
 
+int __stdcall
+check_null_str (const char *name)
+{
+  if (name && !IsBadStringPtr (name, MAX_PATH))
+    return 0;
+
+  return EFAULT;
+}
+
 int __stdcall
 check_null_empty_str (const char *name)
 {
@@ -133,6 +142,15 @@ check_null_empty_str_errno (const char *name)
   return __err;
 }
 
+int __stdcall
+check_null_str_errno (const char *name)
+{
+  int __err;
+  if ((__err = check_null_str (name)))
+    set_errno (__err);
+  return __err;
+}
+
 int __stdcall
 __check_null_invalid_struct (const void *s, unsigned sz)
 {
-- 
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