1 files changed, 86 insertions, 0 deletions
diff --git a/sysdeps/generic/setenv.c b/sysdeps/generic/setenv.c
new file mode 100644
index 0000000000..a27f02e50a
--- /dev/null
+++ b/sysdeps/generic/setenv.c
@@ -0,0 +1,86 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef	HAVE_GNU_LD
+#define	__environ	environ
+#endif
+
+int
+DEFUN(setenv, (name, value, replace),
+      CONST char *name AND CONST char *value AND int replace)
+{
+  register char **ep;
+  register size_t size;
+  CONST size_t namelen = strlen (name);
+  CONST size_t vallen = strlen (value);
+
+  size = 0;
+  for (ep = __environ; *ep != NULL; ++ep)
+    if (!strncmp (*ep, name, namelen) && (*ep)[namelen] == '=')
+      break;
+    else
+      ++size;
+  
+  if (*ep == NULL)
+    {
+      static char **last_environ = NULL;
+      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 *));
+
+      new_environ[size] = malloc (namelen + 1 + vallen + 1);
+      if (new_environ[size] == NULL)
+	{
+	  free (new_environ);
+	  errno = ENOMEM;
+	  return -1;
+	}
+      memcpy (new_environ[size], name, namelen);
+      new_environ[size][namelen] = '=';
+      memcpy (&new_environ[size][namelen + 1], value, vallen + 1);
+
+      new_environ[size + 1] = NULL;
+
+      if (last_environ != NULL)
+	free ((PTR) last_environ);
+      last_environ = new_environ;
+      __environ = new_environ;
+    }
+  else if (replace)
+    {
+      size_t len = strlen (*ep);
+      if (len < namelen + 1 + vallen)
+	{
+	  char *new = malloc (namelen + 1 + vallen);
+	  if (new == NULL)
+	    return -1;
+	  *ep = new;
+	}
+      memcpy (*ep, name, namelen);
+      (*ep)[namelen] = '=';
+      memcpy (&(*ep)[namelen + 1], value, vallen + 1);
+    }
+
+  return 0;
+}