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posix_spawnattr_getflags, posix_spawnattr_setflags: získejte a nastavte atribut spawn-flags objektu spawn atributy (POKROČILÝ REÁLNÝ ČAS)

Originální popis anglicky: posix_spawnattr_getflags, posix_spawnattr_setflags - get and set the spawn-flags attribute of a spawn attributes object ( ADVANCED REALTIME)

Návod, kniha: POSIX Programmer's Manual

STRUČNĚ

#include <spawn.h>
 
 
int posix_spawnattr_getflags(const posix_spawnattr_t *restrict attr,
 
       short *restrict flags );
 
int posix_spawnattr_setflags(posix_spawnattr_t * attr, short flags);
 

POPIS / INSTRUKCE

The posix_spawnattr_getflags() function shall obtain the value of the spawn-flags attribute from the attributes object referenced by attr.
The posix_spawnattr_setflags() function shall set the spawn-flags attribute in an initialized attributes object referenced by attr.
The spawn-flags attribute is used to indicate which process attributes are to be changed in the new process image when invoking posix_spawn() or posix_spawnp(). It is the bitwise-inclusive OR of zero or more of the following flags:
POSIX_SPAWN_RESETIDS
 
POSIX_SPAWN_SETPGROUP
 
POSIX_SPAWN_SETSIGDEF
 
POSIX_SPAWN_SETSIGMASK
 
 
POSIX_SPAWN_SETSCHEDPARAM
 
POSIX_SPAWN_SETSCHEDULER
 
 
These flags are defined in <spawn.h>. The default value of this attribute shall be as if no flags were set.

NÁVRATOVÁ HODNOTA

Upon successful completion, posix_spawnattr_getflags() shall return zero and store the value of the spawn-flags attribute of attr into the object referenced by the flags parameter; otherwise, an error number shall be returned to indicate the error.
Upon successful completion, posix_spawnattr_setflags() shall return zero; otherwise, an error number shall be returned to indicate the error.

CHYBY / ERRORY

These functions may fail if:
EINVAL
The value specified by attr is invalid.
 
The posix_spawnattr_setflags() function may fail if:
EINVAL
The value of the attribute being set is not valid.
 
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

None.

FUTURE DIRECTIONS

None.

SOUVISEJÍCÍ

posix_spawn() , posix_spawnattr_destroy() , posix_spawnattr_init() , posix_spawnattr_getsigdefault() , posix_spawnattr_getpgroup() , posix_spawnattr_getschedparam() , posix_spawnattr_getschedpolicy() , posix_spawnattr_getsigmask() , posix_spawnattr_setsigdefault() , posix_spawnattr_setpgroup() , posix_spawnattr_setschedparam() , posix_spawnattr_setschedpolicy() , posix_spawnattr_setsigmask() , 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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