From 69dba6d784566248205fc990673c14d259c4907f Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Mon, 21 Nov 2011 00:56:11 +0100
Subject: getcwd: Work around getcwd bug on AIX 5..7.

* m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Require
AC_CANONICAL_HOST. Assign exit code 31 to the bug seen on AIX 5.1..7.1.
Use a different value for gl_cv_func_getcwd_path_max. Move the
definition of HAVE_PARTLY_WORKING_GETCWD from here...
* m4/getcwd.m4 (gl_FUNC_GETCWD): ... to here. Invoke
gl_FUNC_GETCWD_PATH_MAX also when $gl_cv_func_getcwd_null is 'no'.
Define HAVE_MINIMALLY_WORKING_GETCWD.
* lib/getcwd.c (__getcwd): Don't use the system's getcwd on platforms
where it is not even minimally working, that is, on AIX.
* tests/test-getcwd.c (test_long_name): Distinguish the same cases as
m4/getcwd-path-max.m4.
(main): Update exit code computation.
* doc/posix-functions/getcwd.texi: Mention list of platforms where
getcwd does not handle long file names.
---
 m4/getcwd.m4 | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'm4/getcwd.m4')

diff --git a/m4/getcwd.m4 b/m4/getcwd.m4
index 982ef4ed9c..dbdfcd2f41 100644
--- a/m4/getcwd.m4
+++ b/m4/getcwd.m4
@@ -113,14 +113,31 @@ AC_DEFUN([gl_FUNC_GETCWD],
       gl_cv_func_getcwd_path_max=yes
       ;;
     *)
+      gl_FUNC_GETCWD_PATH_MAX
       case "$gl_cv_func_getcwd_null" in
         *yes)
-          gl_FUNC_GETCWD_PATH_MAX
           gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes])
           ;;
       esac
       ;;
   esac
+  dnl Define HAVE_MINIMALLY_WORKING_GETCWD and HAVE_PARTLY_WORKING_GETCWD
+  dnl if appropriate.
+  case "$gl_cv_func_getcwd_path_max" in
+    "no, it has the AIX bug") ;;
+    *)
+      AC_DEFINE([HAVE_MINIMALLY_WORKING_GETCWD], [1],
+        [Define to 1 if getcwd minimally works, that is, its result can be
+         trusted when it succeeds.])
+      ;;
+  esac
+  case "$gl_cv_func_getcwd_path_max" in
+    "no, but it is partly working")
+      AC_DEFINE([HAVE_PARTLY_WORKING_GETCWD], [1],
+        [Define to 1 if getcwd works, except it sometimes fails when it
+         shouldn't, setting errno to ERANGE, ENAMETOOLONG, or ENOENT.])
+      ;;
+  esac
 
   case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature$gl_cv_func_getcwd_path_max,$gl_abort_bug in
   *yes,yes,yes,no) ;;
-- 
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