Imported Upstream version 1.5

[debian/gzip] / lib / at-func.c

diff --git a/lib/at-func.c b/lib/at-func.c
deleted file mode 100644 (file)
index ea456ed..0000000
--- a/lib/at-func.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/* Define an at-style functions like fstatat, unlinkat, fchownat, etc.
-   Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-/* written by Jim Meyering */
-
-#include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
-#include "openat.h"
-#include "openat-priv.h"
-#include "save-cwd.h"
-
-#ifdef AT_FUNC_USE_F1_COND
-# define CALL_FUNC(F)                           \
-  (flag == AT_FUNC_USE_F1_COND                  \
-    ? AT_FUNC_F1 (F AT_FUNC_POST_FILE_ARGS)     \
-    : AT_FUNC_F2 (F AT_FUNC_POST_FILE_ARGS))
-# define VALIDATE_FLAG(F)                       \
-  if (flag & ~AT_FUNC_USE_F1_COND)              \
-    {                                           \
-      errno = EINVAL;                           \
-      return FUNC_FAIL;                         \
-    }
-#else
-# define CALL_FUNC(F) (AT_FUNC_F1 (F AT_FUNC_POST_FILE_ARGS))
-# define VALIDATE_FLAG(F) /* empty */
-#endif
-
-#ifdef AT_FUNC_RESULT
-# define FUNC_RESULT AT_FUNC_RESULT
-#else
-# define FUNC_RESULT int
-#endif
-
-#ifdef AT_FUNC_FAIL
-# define FUNC_FAIL AT_FUNC_FAIL
-#else
-# define FUNC_FAIL -1
-#endif
-
-/* Call AT_FUNC_F1 to operate on FILE, which is in the directory
-   open on descriptor FD.  If AT_FUNC_USE_F1_COND is defined to a value,
-   AT_FUNC_POST_FILE_PARAM_DECLS must inlude a parameter named flag;
-   call AT_FUNC_F2 if FLAG is 0 or fail if FLAG contains more bits than
-   AT_FUNC_USE_F1_COND.  Return int and fail with -1 unless AT_FUNC_RESULT
-   or AT_FUNC_FAIL are defined.  If possible, do it without changing the
-   working directory.  Otherwise, resort to using save_cwd/fchdir,
-   then AT_FUNC_F?/restore_cwd.  If either the save_cwd or the restore_cwd
-   fails, then give a diagnostic and exit nonzero.  */
-FUNC_RESULT
-AT_FUNC_NAME (int fd, char const *file AT_FUNC_POST_FILE_PARAM_DECLS)
-{
-  /* Be careful to choose names unlikely to conflict with
-     AT_FUNC_POST_FILE_PARAM_DECLS.  */
-  struct saved_cwd saved_cwd;
-  int saved_errno;
-  FUNC_RESULT err;
-
-  VALIDATE_FLAG (flag);
-
-  if (fd == AT_FDCWD || IS_ABSOLUTE_FILE_NAME (file))
-    return CALL_FUNC (file);
-
-  {
-    char proc_buf[OPENAT_BUFFER_SIZE];
-    char *proc_file = openat_proc_name (proc_buf, fd, file);
-    if (proc_file)
-      {
-        FUNC_RESULT proc_result = CALL_FUNC (proc_file);
-        int proc_errno = errno;
-        if (proc_file != proc_buf)
-          free (proc_file);
-        /* If the syscall succeeds, or if it fails with an unexpected
-           errno value, then return right away.  Otherwise, fall through
-           and resort to using save_cwd/restore_cwd.  */
-        if (FUNC_FAIL != proc_result)
-          return proc_result;
-        if (! EXPECTED_ERRNO (proc_errno))
-          {
-            errno = proc_errno;
-            return proc_result;
-          }
-      }
-  }
-
-  if (save_cwd (&saved_cwd) != 0)
-    openat_save_fail (errno);
-  if (0 <= fd && fd == saved_cwd.desc)
-    {
-      /* If saving the working directory collides with the user's
-         requested fd, then the user's fd must have been closed to
-         begin with.  */
-      free_cwd (&saved_cwd);
-      errno = EBADF;
-      return FUNC_FAIL;
-    }
-
-  if (fchdir (fd) != 0)
-    {
-      saved_errno = errno;
-      free_cwd (&saved_cwd);
-      errno = saved_errno;
-      return FUNC_FAIL;
-    }
-
-  err = CALL_FUNC (file);
-  saved_errno = (err == FUNC_FAIL ? errno : 0);
-
-  if (restore_cwd (&saved_cwd) != 0)
-    openat_restore_fail (errno);
-
-  free_cwd (&saved_cwd);
-
-  if (saved_errno)
-    errno = saved_errno;
-  return err;
-}
-#undef CALL_FUNC
-#undef FUNC_RESULT
-#undef FUNC_FAIL