NAME

       posix_spawn_file_actions_adddup2 - add dup2 action to spawn file actions object (ADVANCED REALTIME)

SYNOPSIS

       #include <spawn.h>

       int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *
              file_actions, int fildes, int newfildes);

DESCRIPTION

       The  posix_spawn_file_actions_adddup2()  function  shall  add a dup2() action to the object referenced by
       file_actions that shall cause the file descriptor fildes to be  duplicated  as  newfildes  (as  if  dup2(
       fildes, newfildes) had been called) when a new process is spawned using this file actions object.

       A spawn file actions object is as defined in posix_spawn_file_actions_addclose() .

RETURN VALUE

       Upon successful completion, the posix_spawn_file_actions_adddup2() function shall return zero; otherwise,
       an error number shall be returned to indicate the error.

ERRORS

       The posix_spawn_file_actions_adddup2() function shall fail if:

       EBADF  The value specified by fildes or newfildes is negative or greater than or equal to {OPEN_MAX}.

       ENOMEM Insufficient memory exists to add to the spawn file actions object.

       The posix_spawn_file_actions_adddup2() function may fail if:

       EINVAL The value specified by file_actions is invalid.

       It    shall    not    be    considered    an    error   for   the   fildes   argument   passed   to   the
       posix_spawn_file_actions_adddup2() function  to  specify  a  file  descriptor  for  which  the  specified
       operation  could  not  be  performed  at  the  time of the call. Any such error will be detected when the
       associated file actions object is later used during a posix_spawn() or posix_spawnp() operation.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The posix_spawn_file_actions_adddup2() function is part of the Spawn option and need not be  provided  on
       all implementations.

RATIONALE

       Refer to the RATIONALE in posix_spawn_file_actions_addclose() .

FUTURE DIRECTIONS

       None.

SEE ALSO

       dup()  ,  posix_spawn()  ,  posix_spawn_file_actions_addclose()  ,  posix_spawn_file_actions_destroy()  ,
       posix_spawnp() , the Base Definitions volume of IEEE Std 1003.1-2001, <spawn.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc  and  The  Open Group. In the event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                   POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(P)