* exceptions.cc (interruptible): Allocate slightly more space for directory

name check.  Windows 95 seems to null-terminate the directory otherwise.
(interrupt_on_return): Issue a fatal error if we can't find the caller's stack.
* spawn.cc (find_exec): Accept a path_conv argument rather than a buffer so
that the caller can find things out about a translated path.
(perhaps_suffix): Ditto.
(spawn_guts): Allocate path_conv stuff here so that we can find out stuff about
the translated path (this is work in progress).
* environ.cc (environ_init): Accept an as-yet unused argument indicating
whether we were invoked from a cygwin parent or not.
(winenv): Ditto.
(posify): Accept an argument indicating whether the path has already been
translated.
* dlfcn.cc (check_access): Provide a path_conv buffer to find_exec.
* exec.cc (sexecvpe): Ditto.
* path.cc (path_conv::check): Rename from path_conv::path_conv.
(mount_item::getmntent): Recognize "Cygwin executable" bit.
(symlink_info::check): Remove debugging statements.
* path.h (class path_conv): Add iscygexec method.  Rewrite constructor to call
"check" method to allow multiple operations on a path_conv variable.
* pinfo.cc (pinfo_init): Pass argument to environ_init.
* shared.h: Bump PROC_MAGIC.
* winsup.h: Reflect above changes to function arguments.
* include/sys/mount.h: Add MOUNT_CYGWIN_EXEC type.

1 files changed, 5 insertions, 4 deletions

diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index f82f6364a..dea040659 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -568,13 +568,13 @@ interruptible (DWORD pc)
       if (!VirtualQuery ((LPCVOID) pc, &m, sizeof m))
 	sigproc_printf ("couldn't get memory info, %E");
 
-      char *checkdir = (char *) alloca (windows_system_directory_length);
+      char *checkdir = (char *) alloca (windows_system_directory_length + 2);
 #     define h ((HMODULE) m.AllocationBase)
       if (h == user_data->hmodule)
 	res = 1;
       else if (h == cygwin_hmodule)
 	res = 0;
-      else if (!GetModuleFileName (h, checkdir, windows_system_directory_length))
+      else if (!GetModuleFileName (h, checkdir, windows_system_directory_length + 2))
 	res = 0;
       else
         res = !strncasematch (windows_system_directory, checkdir,
@@ -642,10 +642,11 @@ interrupt_on_return (DWORD ebp, int sig, struct sigaction& siga, void *handler)
 	    interrupt_setup (sig, siga, handler, *addr_retaddr, addr_retaddr);
 	    *addr_retaddr = (DWORD) sigdelayed;
 	  }
-	break;
+	return 1;
       }
 
-  return 1;
+  api_fatal ("couldn't send signal %d", sig);
+  return 0;
 }
 
 extern "C" void __stdcall