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/* Copyright (C) 2002 by  Red Hat, Incorporated. All rights reserved.

 *

 * Permission to use, copy, modify, and distribute this software

 * is freely granted, provided that this notice is preserved.

 */

#include <errno.h>

#include <sys/types.h>

#include <string.h>

#include <stdlib.h>

#include <argz.h>

#include <envz.h>

error_t

_DEFUN (envz_merge, (envz, envz_len, envz2, envz2_len, override),

       char **envz _AND

       size_t *envz_len _AND

       const char *envz2 _AND

       size_t envz2_len _AND

       int override)

{

  char *entry = NULL;

  char *name_str = NULL;

  char *val_str = NULL;

  char *name_iter = NULL;

  int retval = 0;

  while((entry = argz_next((char *)envz2, envz2_len, entry)) && !retval)

    {

      if (!override)

        {

          name_str = strdup (entry);

          name_iter = strchr(name_str, '=');

          if(name_iter)

            *name_iter = '\0';

          if(!envz_entry(*envz, *envz_len, name_str))

            {

              retval = argz_add(envz, envz_len, entry);

            }

          free(name_str);

        }

      else

        {

          name_str = strdup (entry);

          name_iter = strchr(name_str, '=');

          if(name_iter)

            {

              *name_iter = '\0';

              val_str = name_iter + 1;

            }

          else

            {

              val_str = NULL;

            }

          retval = envz_add(envz, envz_len, name_str, val_str);

        }

    }

  return retval;

}