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posix_spawn_file_actions_destroy, posix_spawn_file_actions_init: zničení a inicializace objektu akcí Spawn (POKROČILÝ REÁLNÝ ČAS)

Originální popis anglicky: posix_spawn_file_actions_destroy, posix_spawn_file_actions_init - destroy and initialize spawn file actions object ( ADVANCED REALTIME)

Návod, kniha: POSIX Programmer's Manual

STRUČNĚ

#include <spawn.h>
 
 
int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *
 
       file_actions );
 
int posix_spawn_file_actions_init(posix_spawn_file_actions_t *
 
       file_actions );
 

POPIS / INSTRUKCE

The posix_spawn_file_actions_destroy() function shall destroy the object referenced by file_actions; the object becomes, in effect, uninitialized. An implementation may cause posix_spawn_file_actions_destroy() to set the object referenced by file_actions to an invalid value. A destroyed spawn file actions object can be reinitialized using posix_spawn_file_actions_init(); the results of otherwise referencing the object after it has been destroyed are undefined.
The posix_spawn_file_actions_init() function shall initialize the object referenced by file_actions to contain no file actions for posix_spawn() or posix_spawnp() to perform.
A spawn file actions object is as defined in posix_spawn_file_actions_addclose() .
The effect of initializing an already initialized spawn file actions object is undefined.

NÁVRATOVÁ HODNOTA

Upon successful completion, these functions shall return zero; otherwise, an error number shall be returned to indicate the error.

CHYBY / ERRORY

The posix_spawn_file_actions_init() function shall fail if:
ENOMEM
Insufficient memory exists to initialize the spawn file actions object.
 
The posix_spawn_file_actions_destroy() function may fail if:
EINVAL
The value specified by file_actions is invalid.
 
The following sections are informative.

PŘÍKLADY POUŽITÍ

None.

APPLICATION USAGE

These functions are 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.

SOUVISEJÍCÍ

posix_spawn() , 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 .
2003 IEEE/The Open Group
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