Manual Pages for UNIX Operating System command usage for man posix_spawn_file_actions_addopen

Standard C Library Functions
                            posix_spawn_file_actions_addclose(3C)



NAME
     posix_spawn_file_actions_addclose,
     posix_spawn_file_actions_addopen  - add close or open action
     to spawn file actions object

SYNOPSIS
     #include 

     int posix_spawn_file_actions_addclose(
          posix_spawn_file_actions_t *file_actions, int fildes);


     int posix_spawn_file_actions_addopen(
          posix_spawn_file_actions_t *restrict file_actions, int fildes,
          const char *restrict path, int oflag, mode_t mode);


DESCRIPTION
     These functions add or delete a close or open  action  to  a
     spawn file actions object.


     A    spawn    file    actions    object    is    of     type
     posix_spawn_file_actions_t  (defined  in  )  and is
     used to specify a series of actions to  be  performed  by  a
     posix_spawn(3C)  or  posix_spawn(3C)  operation 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(),  specifies how the set of open file descrip-
     tors in the calling process is transformed  into  a  set  of
     potentially  open  file descriptors for the spawned process.
     This transformation occurs as though 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  exe-
     cuted, any file descriptor (from this new set) which has its
     FD_CLOEXEC flag set is closed (see posix_spawn(3C)).


     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.






SunOS 5.11          Last change: 20 Feb 2009                    1






Standard C Library Functions
                            posix_spawn_file_actions_addclose(3C)



     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.

RETURN VALUES
     Upon successful completion, these functions return 0. Other-
     wise, an error number is returned to indicate the error.

ERRORS
     These functions will fail if:

     EBADF    The  value  specified  by  fildes  is  negative  or
              greater than or equal to {OPEN_MAX}.



     These functions may fail if:

     EINVAL    The value specified by file_actions is invalid.


     ENOMEM    Insufficient memory exists to  add  to  the  spawn
               file actions object.



     It is not considered an error for the fildes argument passed
     to  these  functions  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.


     If a close(2) operation is specified for a  file  descriptor
     that is not open at the time of the call to posix_spawn() or
     posix_spawnp(), the  close  operation  will  not  cause  the
     posix_spawn() or posix_spawnp() operation to fail.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



SunOS 5.11          Last change: 20 Feb 2009                    2






Standard C Library Functions
                            posix_spawn_file_actions_addclose(3C)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|
    | Standard                    | See standards(5).           |
    |_____________________________|_____________________________|


SEE ALSO
     close(2),      dup(2),       open(2),       posix_spawn(3C),
     posix_spawn_file_actions_adddup2(3C),
     posix_spawn_file_actions_destroy(3C),  attributes(5),  stan-
     dards(5)






































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Standard C Library Functions
                            posix_spawn_file_actions_addclose(3C)






















































SunOS 5.11          Last change: 20 Feb 2009                    4