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Cygwin: syscalls.cc: remove ".dll" from blessed_executable_suffixes

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This reverts commit d9e9c7b5a7.  The latter added ".dll" to the
blessed_executable_suffixes array because on 32-bit Windows, the
GetBinaryType function would report that a 64-bit DLL is an
executable, contrary to the documentation of that function.

That anomaly does not exist on 64-bit Windows, so we can remove ".dll"
from the list.  Reverting the commit does, however, change the
behavior of the rename(2) syscall in the following unlikely situation:
Suppose we have an executable foo.exe and we make the call

  rename ("foo", "bar.dll");

Previously, foo.exe would be renamed to bar.dll.  So bar.dll would
then be an executable without the .exe extension.  The new behavior is
that foo.exe will be renamed to bar.dll.exe.  [Exception: If there
already existed an executable (not a DLL!) with the name bar.dll, then
.exe will not be appended.]
This commit is contained in:
Ken Brown 2022-08-03 16:45:23 -04:00
parent 288788f91e
commit c2aa5b6d74
2 changed files with 0 additions and 7 deletions
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1
winsup/cygwin/globals.cc
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@ -120,7 +120,6 @@ const int __collate_load_error = 0;
extern UNICODE_STRING _RDATA ro_u_empty = _ROU (L"");
extern UNICODE_STRING _RDATA ro_u_lnk = _ROU (L".lnk");
extern UNICODE_STRING _RDATA ro_u_exe = _ROU (L".exe");
extern UNICODE_STRING _RDATA ro_u_dll = _ROU (L".dll");
extern UNICODE_STRING _RDATA ro_u_com = _ROU (L".com");
extern UNICODE_STRING _RDATA ro_u_scr = _ROU (L".scr");
extern UNICODE_STRING _RDATA ro_u_sys = _ROU (L".sys");

6
winsup/cygwin/syscalls.cc
View File

@ -2098,12 +2098,6 @@ nt_path_has_executable_suffix (PUNICODE_STRING upath)
static const PUNICODE_STRING blessed_executable_suffixes[] =
{
&ro_u_com,
&ro_u_dll, /* Messy, messy. Per MSDN, the GetBinaryType function is
supposed to return with ERROR_BAD_EXE_FORMAT. if the file
is a DLL. On 64-bit Windows, this works as expected for
32-bit and 64-bit DLLs. On 32-bit Windows this only works
for 32-bit DLLs. For 64-bit DLLs, 32-bit Windows returns
true with the type set to SCS_64BIT_BINARY. */
&ro_u_exe,
&ro_u_scr,
&ro_u_sys,