/* Copyright (C) 1991-2018 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 Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <unistd.h>

#include <hurd.h>

#include <fcntl.h>

#include <stdlib.h>

#include <stdio.h>

/* Replace the current process, executing FILE_NAME with arguments ARGV and

   environment ENVP.  ARGV and ENVP are terminated by NULL pointers.  */

int

__execve (const char *file_name, char *const argv[], char *const envp[])

{

  error_t err;

  char *concat_name = NULL;

  const char *abs_path;

  file_t file = __file_name_lookup (file_name, O_EXEC, 0);

  if (file == MACH_PORT_NULL)

    return -1;

  if (file_name[0] == '/')

    {

      /* Already an absolute path */

      abs_path = file_name;

    }

  else

    {

      /* Relative path */

      char *cwd = __getcwd (NULL, 0);

      if (cwd == NULL)

	{

	  __mach_port_deallocate (__mach_task_self (), file);

	  return -1;

	}

      int res = __asprintf (&concat_name, "%s/%s", cwd, file_name);

      free (cwd);

      if (res == -1)

	{

	  __mach_port_deallocate (__mach_task_self (), file);

	  return -1;

	}

      abs_path = concat_name;

    }

  /* Hopefully this will not return.  */

  err = _hurd_exec_paths (__mach_task_self (), file,

			  file_name, abs_path, argv, envp);

  /* Oh well.  Might as well be tidy.  */

  __mach_port_deallocate (__mach_task_self (), file);

  free (concat_name);

  return __hurd_fail (err);

}

weak_alias (__execve, execve)