merge with 3.9i

[gnulib.git] / lib / putenv.c

diff --git a/lib/putenv.c b/lib/putenv.c
index 9ba55a7..06e3254 100644 (file)
--- a/lib/putenv.c
+++ b/lib/putenv.c
@@ -1,46 +1,76 @@
 /* Copyright (C) 1991 Free Software Foundation, Inc.
 
-NOTE: The canonical source of this file is maintained with the GNU C Library.
-Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+   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 2, or (at your option)
+   any later version.
 
-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 2, 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.
 
-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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
 
-#include <ansidecl.h>
+#include <sys/types.h>
 #include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+
+/* Don't include stdlib.h for non-GNU C libraries because some of them
+   contain conflicting prototypes for getopt.
+   This needs to come after some library #include
+   to get __GNU_LIBRARY__ defined.  */
+#ifdef __GNU_LIBRARY__
 #include <stdlib.h>
+#else
+char *malloc ();
+#endif /* GNU C library.  */
+
+#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
 #include <string.h>
+#else
+#include <strings.h>
+#ifndef strchr
+#define strchr index
+#endif
+#ifndef memcpy
+#define memcpy(d, s, n) bcopy((s), (d), (n))
+#endif
+#endif
+
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 
-#ifndef        HAVE_GNU_LD
-#define        __environ       environ
+#ifndef NULL
+#define NULL 0
 #endif
 
+extern char **environ;
+
 /* Put STRING, which is of the form "NAME=VALUE", in the environment.  */
 int
-DEFUN(putenv, (string), CONST char *string)
+putenv (string)
+     const char *string;
 {
-  CONST char *CONST name_end = strchr(string, '=');
+  char *name_end = strchr (string, '=');
   register size_t size;
   register char **ep;
 
   if (name_end == NULL)
     {
       /* Remove the variable from the environment.  */
-      size = strlen(string);
-      for (ep = __environ; *ep != NULL; ++ep)
-       if (!strncmp(*ep, string, size) && (*ep)[size] == '=')
+      size = strlen (string);
+      for (ep = environ; *ep != NULL; ++ep)
+       if (!strncmp (*ep, string, size) && (*ep)[size] == '=')
          {
            while (ep[1] != NULL)
              {
@@ -53,8 +83,8 @@ DEFUN(putenv, (string), CONST char *string)
     }
 
   size = 0;
-  for (ep = __environ; *ep != NULL; ++ep)
-    if (!strncmp(*ep, string, name_end - string) &&
+  for (ep = environ; *ep != NULL; ++ep)
+    if (!strncmp (*ep, string, name_end - string) &&
        (*ep)[name_end - string] == '=')
       break;
     else
@@ -63,16 +93,16 @@ DEFUN(putenv, (string), CONST char *string)
   if (*ep == NULL)
     {
       static char **last_environ = NULL;
-      char **new_environ = (char **) malloc((size + 2) * sizeof(char *));
+      char **new_environ = (char **) malloc ((size + 2) * sizeof (char *));
       if (new_environ == NULL)
        return -1;
-      (void) memcpy((PTR) new_environ, (PTR) __environ, size * sizeof(char *));
+      memcpy ((char *) new_environ, (char *) environ, size * sizeof (char *));
       new_environ[size] = (char *) string;
       new_environ[size + 1] = NULL;
       if (last_environ != NULL)
-       free((PTR) last_environ);
+       free ((char *) last_environ);
       last_environ = new_environ;
-      __environ = new_environ;
+      environ = new_environ;
     }
   else
     *ep = (char *) string;