Imported Upstream version 1.5

[debian/gzip] / m4 / getcwd-abort-bug.m4

diff --git a/m4/getcwd-abort-bug.m4 b/m4/getcwd-abort-bug.m4
deleted file mode 100644 (file)
index 59c3daa..0000000
--- a/m4/getcwd-abort-bug.m4
+++ /dev/null
@@ -1,106 +0,0 @@
-# serial 2
-# Determine whether getcwd aborts when the length of the working directory
-# name is unusually large.  Any length between 4k and 16k trigger the bug
-# when using glibc-2.4.90-9 or older.
-
-# Copyright (C) 2006, 2009, 2010 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# From Jim Meyering
-
-# gl_FUNC_GETCWD_ABORT_BUG([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
-AC_DEFUN([gl_FUNC_GETCWD_ABORT_BUG],
-[
-  AC_CHECK_DECLS_ONCE([getcwd])
-  AC_CHECK_FUNCS([getpagesize])
-  AC_CACHE_CHECK([whether getcwd aborts when 4k < cwd_length < 16k],
-    gl_cv_func_getcwd_abort_bug,
-    [# Remove any remnants of a previous test.
-     rm -rf confdir-14B---
-     # Arrange for deletion of the temporary directory this test creates.
-     ac_clean_files="$ac_clean_files confdir-14B---"
-     AC_RUN_IFELSE(
-       [AC_LANG_SOURCE(
-          [[
-#include <stdlib.h>
-#include <unistd.h>
-#include <limits.h>
-#include <string.h>
-#include <sys/stat.h>
-
-/* Don't get link errors because mkdir is redefined to rpl_mkdir.  */
-#undef mkdir
-
-#ifndef S_IRWXU
-# define S_IRWXU 0700
-#endif
-
-/* FIXME: skip the run-test altogether on systems without getpagesize.  */
-#if ! HAVE_GETPAGESIZE
-# define getpagesize() 0
-#endif
-
-/* This size is chosen to be larger than PATH_MAX (4k), yet smaller than
-   the 16kB pagesize on ia64 linux.  Those conditions make the code below
-   trigger a bug in glibc's getcwd implementation before 2.4.90-10.  */
-#define TARGET_LEN (5 * 1024)
-
-int
-main ()
-{
-  char const *dir_name = "confdir-14B---";
-  char *cwd;
-  size_t initial_cwd_len;
-  int fail = 0;
-  size_t desired_depth;
-  size_t d;
-
-  /* The bug is triggered when PATH_MAX < getpagesize (), so skip
-     this relative expensive and invasive test if that's not true.  */
-  if (getpagesize () <= PATH_MAX)
-    return 0;
-
-  cwd = getcwd (NULL, 0);
-  if (cwd == NULL)
-    return 0;
-
-  initial_cwd_len = strlen (cwd);
-  free (cwd);
-  desired_depth = ((TARGET_LEN - 1 - initial_cwd_len)
-                   / (1 + strlen (dir_name)));
-  for (d = 0; d < desired_depth; d++)
-    {
-      if (mkdir (dir_name, S_IRWXU) < 0 || chdir (dir_name) < 0)
-        {
-          fail = 3; /* Unable to construct deep hierarchy.  */
-          break;
-        }
-    }
-
-  /* If libc has the bug in question, this invocation of getcwd
-     results in a failed assertion.  */
-  cwd = getcwd (NULL, 0);
-  if (cwd == NULL)
-    fail = 4; /* getcwd failed.  This is ok, and expected.  */
-  free (cwd);
-
-  /* Call rmdir first, in case the above chdir failed.  */
-  rmdir (dir_name);
-  while (0 < d--)
-    {
-      if (chdir ("..") < 0)
-        break;
-      rmdir (dir_name);
-    }
-
-  return 0;
-}
-          ]])],
-    [gl_cv_func_getcwd_abort_bug=no],
-    [gl_cv_func_getcwd_abort_bug=yes],
-    [gl_cv_func_getcwd_abort_bug=yes])
-  ])
-  AS_IF([test $gl_cv_func_getcwd_abort_bug = yes], [$1], [$2])
-])