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POSIX_SPAWN_FILE_ACTIONS_ADPOSIX(ProgrammePOSIX_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 (consult 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 associ-
       ated 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 Defini-
       tions 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(3P)