Mes C Library: m2/getcwd.c: Remove specialization.

* lib/posix/getcwd.c (getcwd): Cater for M2-Planet.
* lib/m2/getcwd.c: Remove.
* kaem.run: Update accordingly.
* simple.make (M2_SOURCES): Likewise.

kaem.run

@@ -90,7 +90,7 @@ M2-Planet                                       \
     -f lib/m2/clock_gettime.c                   \
     -f lib/m2/time.c                            \
     -f lib/linux/_getcwd.c                      \
-    -f lib/m2/getcwd.c                          \
+    -f lib/posix/getcwd.c                       \
     -f lib/linux/dup.c                          \
     -f lib/linux/dup2.c                         \
     -f lib/string/strcmp.c                      \

lib/m2/getcwd.c

@@ -1,37 +0,0 @@
-/* -*-comment-start: "//";comment-end:""-*-
- * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
- *
- * This file is part of GNU Mes.
- *
- * GNU Mes 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.
- *
- * GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <mes/lib.h>
-#include <limits.h>
-#include <sys/types.h>
-#include <mes/lib.h>
-
-// CONSTANT PATH_MAX 1024
-
-char *
-getcwd (char *buffer, int size)
-{
-  if (__getcwd_buf == 0)
-    __getcwd_buf = malloc (PATH_MAX);
-  char *buf = __itoa_buf;
-  if (buffer != 0)
-    return _getcwd (buffer, size);
-  return _getcwd (buf, PATH_MAX);
-}

lib/posix/getcwd.c

@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2016,2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -19,15 +19,20 @@
  */
 
 #include <mes/lib.h>
+#include <mes/mes.h>
 #include <limits.h>
+#include <stdlib.h>
 #include <sys/types.h>
-#include <mes/lib.h>
+
+// CONSTANT PATH_MAX 1024
 
 char *
-getcwd (char *buffer, size_t size)
+getcwd (char *buffer, int size)
 {
-  static char buf[PATH_MAX];
-  if (buffer)
+  if (__getcwd_buf == 0)
+    __getcwd_buf = malloc (PATH_MAX);
+  char *buf = __getcwd_buf;
+  if (buffer != 0)
     return _getcwd (buffer, size);
   return _getcwd (buf, PATH_MAX);
 }

simple.make

@@ -129,7 +129,7 @@ M2_SOURCES =					\
  lib/m2/clock_gettime.c				\
  lib/m2/time.c					\
  lib/linux/_getcwd.c				\
- lib/m2/getcwd.c				\
+ lib/posix/getcwd.c				\
  lib/linux/dup.c				\
  lib/linux/dup2.c				\
  lib/string/strcmp.c				\