/* -*- buffer-read-only: t -*- vi: set ro: */
/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
-/* Copyright (C) 1991-1999, 2004-2010 Free Software Foundation, Inc.
+/* Copyright (C) 1991-1999, 2004-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This program is free software: you can redistribute it and/or modify
#include <fcntl.h> /* For AT_FDCWD on Solaris 9. */
-/* If this host provides the openat function, then enable
+/* If this host provides the openat function or if we're using the
+ gnulib replacement function with a native fdopendir, then enable
code below to make getcwd more efficient and robust. */
-#ifdef HAVE_OPENAT
+#if defined HAVE_OPENAT || (defined GNULIB_OPENAT && defined HAVE_FDOPENDIR)
# define HAVE_OPENAT_SUPPORT 1
#else
# define HAVE_OPENAT_SUPPORT 0
# endif
#endif
-#include <limits.h>
-
#ifndef MAX
# define MAX(a, b) ((a) < (b) ? (b) : (a))
#endif
# define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
+#include "pathmax.h"
+
+/* In this file, PATH_MAX only serves as a threshold for choosing among two
+ algorithms. */
#ifndef PATH_MAX
-# ifdef MAXPATHLEN
-# define PATH_MAX MAXPATHLEN
-# else
-# define PATH_MAX 1024
-# endif
+# define PATH_MAX 8192
#endif
#if D_INO_IN_DIRENT
/* Get the name of the current working directory, and put it in SIZE
bytes of BUF. Returns NULL if the directory couldn't be determined or
SIZE was too small. If successful, returns BUF. In GNU, if BUF is
- NULL, an array is allocated with `malloc'; the array is SIZE bytes long,
+ NULL, an array is allocated with 'malloc'; the array is SIZE bytes long,
unless SIZE == 0, in which case it is as big as necessary. */
char *
size_t allocated = size;
size_t used;
-#if HAVE_RAW_DECL_GETCWD
+#if HAVE_MINIMALLY_WORKING_GETCWD
/* If AT_FDCWD is not defined, the algorithm below is O(N**2) and
this is much slower than the system getcwd (at least on
GNU/Linux). So trust the system getcwd's results unless they
Use the system getcwd even if we have openat support, since the
system getcwd works even when a parent is unreadable, while the
- openat-based approach does not. */
+ openat-based approach does not.
+
+ But on AIX 5.1..7.1, the system getcwd is not even minimally
+ working: If the current directory name is slightly longer than
+ PATH_MAX, it omits the first directory component and returns
+ this wrong result with errno = 0. */
# undef getcwd
dir = getcwd (buf, size);
- if (dir)
+ if (dir || (size && errno == ERANGE))
return dir;
/* Solaris getcwd (NULL, 0) fails with errno == EINVAL, but it has
buf = realloc (dir, used);
if (buf == NULL)
- /* Either buf was NULL all along, or `realloc' failed but
+ /* Either buf was NULL all along, or 'realloc' failed but
we still have the original string. */
buf = dir;