centos man page for posix_spawn_file_actions_adddup2

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 (consult the correspond-
       ing 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 asso-
       ciated 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 Technol-
       ogy -- 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)