| POSIX_SPAWN_FILE_ACTIONS_ADDOPEN(3) | Library Functions Manual | POSIX_SPAWN_FILE_ACTIONS_ADDOPEN(3) | 
posix_spawn_file_actions_addopen,
  posix_spawn_file_actions_adddup2,
  posix_spawn_file_actions_addclose —
#include <spawn.h>
int
  
  posix_spawn_file_actions_addopen(posix_spawn_file_actions_t
    * file_actions, int
    fildes, const char
    *restrict path, int
    oflag, mode_t
    mode);
int
  
  posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t
    * file_actions, int
    fildes, int
    newfildes);
int
  
  posix_spawn_file_actions_addclose(posix_spawn_file_actions_t
    * file_actions, int
    fildes);
A spawn file actions object is of type
    posix_spawn_file_actions_t (defined in
    <spawn.h>) and is used to
    specify a series of actions to be performed by a
    posix_spawn() or
    posix_spawnp() operation in order to arrive at the
    set of open file descriptors for the child process given the set of open
    file descriptors of the parent.
A spawn file actions object, when passed to
    posix_spawn() or
    posix_spawnp(), specify how the set of open file
    descriptors in the calling process is transformed into a set of potentially
    open file descriptors for the spawned process. This transformation is as if
    the specified sequence of actions was performed exactly once, in the context
    of the spawned process (prior to execution of the new process image), in the
    order in which the actions were added to the object; additionally, when the
    new process image is executed, any file descriptor (from this new set) which
    has its FD_CLOEXEC flag set is closed (see
    posix_spawn()).
The posix_spawn_file_actions_addopen()
    function adds an open action to the object referenced by
    file_actions that causes the file named by
    path to be opened (as if
open(path, oflag, mode)
had been called, and the returned file descriptor, if not fildes, had been changed to fildes) when a new process is spawned using this file actions object. If fildes was already an open file descriptor, it is closed before the new file is opened.
The string described by path is copied by
    the posix_spawn_file_actions_addopen() function.
The posix_spawn_file_actions_adddup2()
    function adds a dup2 action to the object referenced by
    file_actions that causes 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.
The posix_spawn_file_actions_addclose()
    function adds a close action to the object referenced by
    file_actions that causes the file descriptor
    fildes to be closed (as if
close(fildes)
had been called) when a new process is spawned using this file actions object.
posix_spawn_file_actions_addopen(),
  posix_spawn_file_actions_adddup2() and
  posix_spawn_file_actions_addclose() functions conform
  to IEEE Std 1003.1-2001 (“POSIX.1”).
posix_spawn_file_actions_addopen(),
  posix_spawn_file_actions_adddup2() and
  posix_spawn_file_actions_addclose() functions first
  appeared in FreeBSD 8.0 and imported for
  NetBSD 6.0.
| February 2, 2014 | NetBSD 10.0 |