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posix_spawnattr_getpgroup, posix_spawnattr_setpgroup: získat a nastavit atribut spawn-pgroup objektu spawn atributy (POKROČILÝ REÁLNÝ ČAS)

Originální popis anglicky: posix_spawnattr_getpgroup, posix_spawnattr_setpgroup - get and set the spawn-pgroup attribute of a spawn attributes object ( ADVANCED REALTIME)

Návod, kniha: POSIX Programmer's Manual

STRUČNĚ

#include <spawn.h>
 
 
int posix_spawnattr_getpgroup(const posix_spawnattr_t *restrict attr,
 
       pid_t *restrict pgroup );
 
int posix_spawnattr_setpgroup(posix_spawnattr_t * attr, pid_t pgroup);
 

POPIS / INSTRUKCE

The posix_spawnattr_getpgroup() function shall obtain the value of the spawn-pgroup attribute from the attributes object referenced by attr.
The posix_spawnattr_setpgroup() function shall set the spawn-pgroup attribute in an initialized attributes object referenced by attr.
The spawn-pgroup attribute represents the process group to be joined by the new process image in a spawn operation (if POSIX_SPAWN_SETPGROUP is set in the spawn-flags attribute). The default value of this attribute shall be zero.

NÁVRATOVÁ HODNOTA

Upon successful completion, posix_spawnattr_getpgroup() shall return zero and store the value of the spawn-pgroup attribute of attr into the object referenced by the pgroup parameter; otherwise, an error number shall be returned to indicate the error.
Upon successful completion, posix_spawnattr_setpgroup() 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_setpgroup() 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_getflags() , posix_spawnattr_getschedparam() , posix_spawnattr_getschedpolicy() , posix_spawnattr_getsigmask() , posix_spawnattr_setsigdefault() , posix_spawnattr_setflags() , 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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