POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3P)                POSIX Programmer's Manual               POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

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 implementa-
       tions.

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,  Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                          POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3P)