trusty (3) posix_spawn_file_actions_adddup2.3posix.gz

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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>


       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 .