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* cygheap.h (struct cwdstuff): Remove sync member and keep_in_sync

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accessors.
	* external.cc (cygwin_internal): Drop call to cygheap->cwd.keep_in_sync.
	* fhandler_disk_file.cc (fhandler_disk_file::link): Always presume
	ability to create hard links.
	* path.cc (cwdstuff::init): Drop 9x considerations.
	(cwdstuff::keep_in_sync): Remove.
	(cwdstuff::set): Take NT for granted.
	* pinfo.h (cygwin_pid): Just return pid.
	* wincap.cc: Remove has_hard_links, can_open_directories,
	has_negative_pids, has_named_pipes, has_try_enter_critical_section,
	cant_debug_dll_entry and detect_win16_exe throughout.
	* wincap.h: Ditto.
This commit is contained in:
Corinna Vinschen
2007-02-22 18:01:13 +00:00
parent 3af640487f
commit 8e17bd8685
8 changed files with 149 additions and 240 deletions
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145
winsup/cygwin/path.cc
View File

@ -4187,28 +4187,11 @@ cwdstuff::init ()
{
cwd_lock.init ("cwd_lock");
get_initial ();
if (!dynamically_loaded && !keep_in_sync ())
{
/* Actually chdir into the system dir to avoid cwd problems on 9x.
See comment in cwdstuff::set below. */
if (!wincap.can_open_directories ())
SetCurrentDirectory (windows_system_directory);
else
close_user_proc_parms_cwd_handle ();
}
if (!dynamically_loaded)
close_user_proc_parms_cwd_handle ();
cwd_lock.release ();
}
void
cwdstuff::keep_in_sync (bool val)
{
if (!wincap.can_open_directories ())
{
sync = val;
SetCurrentDirectory (val ? win32 : windows_system_directory);
}
}
/* Get initial cwd. Should only be called once in a process tree. */
bool
cwdstuff::get_initial ()
@ -4236,81 +4219,61 @@ cwdstuff::set (const char *win32_cwd, const char *posix_cwd, bool doit)
cwd_lock.acquire ();
if (doit)
{
if (keep_in_sync ())
/* We utilize the user parameter block. The directory is
stored manually, but the handle to the directory is always
closed and set to NULL. This way the directory isn't blocked
even if it's the cwd of a Cygwin process.
Why the hassle?
- A process has always an open handle to the current working
directory which disallows manipulating this directory.
POSIX allows to remove a directory if the permissions are ok.
The fact that its the cwd of some process doesn't matter.
- SetCurrentDirectory fails for directories with strict
permissions even for processes with the SE_BACKUP_NAME
privilege enabled. The reason is apparently that
SetCurrentDirectory calls NtOpenFile without the
FILE_OPEN_FOR_BACKUP_INTENT flag set. */
HANDLE h;
DWORD attr = GetFileAttributes (win32_cwd);
if (attr == INVALID_FILE_ATTRIBUTES)
{
/* If a Cygwin application called cygwin_internal(CW_SYNC_WINENV),
then it's about to call native Windows functions. This also
sets the keep_in_sync flag so that we actually chdir into the
native directory on 9x to avoid confusion. */
if (!SetCurrentDirectory (win32_cwd))
{
__seterrno ();
goto out;
}
set_errno (ENOENT);
goto out;
}
if (!(attr & FILE_ATTRIBUTE_DIRECTORY))
{
set_errno (ENOTDIR);
goto out;
}
h = CreateFile (win32_cwd, FILE_TRAVERSE, FILE_SHARE_VALID_FLAGS,
NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS,
NULL);
if (h == INVALID_HANDLE_VALUE)
{
__seterrno ();
goto out;
}
ULONG len = strlen (win32_cwd);
ANSI_STRING as = {len, len + 2, (PCHAR) alloca (len + 2)};
strcpy (as.Buffer, win32_cwd);
if (as.Buffer[len - 1] != '\\')
{
strcpy (as.Buffer + len, "\\");
++as.Length;
}
if (current_codepage == ansi_cp)
RtlAnsiStringToUnicodeString (
&get_user_proc_parms ()->CurrentDirectoryName,
&as, FALSE);
else
{
/* We don't actually chdir on 9x but stay in the system dir.
On NT we utilize the user parameter block. The directory is
stored manually, but the handle to the directory is always
closed and set to NULL. This way the directory isn't blocked
even if it's the cwd of a Cygwin process.
Why the hassle?
- A process has always an open handle to the current working
directory which disallows manipulating this directory.
POSIX allows to remove a directory if the permissions are ok.
The fact that its the cwd of some process doesn't matter.
- SetCurrentDirectory fails for directories with strict
permissions even for processes with the SE_BACKUP_NAME
privilege enabled. The reason is apparently that
SetCurrentDirectory calls NtOpenFile without the
FILE_OPEN_FOR_BACKUP_INTENT flag set. */
DWORD attr = GetFileAttributes (win32_cwd);
if (attr == INVALID_FILE_ATTRIBUTES)
{
set_errno (ENOENT);
goto out;
}
if (!(attr & FILE_ATTRIBUTE_DIRECTORY))
{
set_errno (ENOTDIR);
goto out;
}
if (wincap.can_open_directories ())
{
HANDLE h = CreateFile (win32_cwd, FILE_TRAVERSE,
FILE_SHARE_VALID_FLAGS, NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE)
{
__seterrno ();
goto out;
}
ULONG len = strlen (win32_cwd);
ANSI_STRING as = {len, len + 2, (PCHAR) alloca (len + 2)};
strcpy (as.Buffer, win32_cwd);
if (as.Buffer[len - 1] != '\\')
{
strcpy (as.Buffer + len, "\\");
++as.Length;
}
if (current_codepage == ansi_cp)
RtlAnsiStringToUnicodeString (
&get_user_proc_parms ()->CurrentDirectoryName,
&as, FALSE);
else
RtlOemStringToUnicodeString (
&get_user_proc_parms ()->CurrentDirectoryName,
&as, FALSE);
close_user_proc_parms_cwd_handle ();
CloseHandle (h);
}
}
RtlOemStringToUnicodeString (
&get_user_proc_parms ()->CurrentDirectoryName,
&as, FALSE);
close_user_proc_parms_cwd_handle ();
CloseHandle (h);
}
}
/* If there is no win32 path or it has the form c:xxx, get the value */