posix_spawnattr_setflags (3p) - Linux Manuals

posix_spawnattr_setflags: get and set the

PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

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

SYNOPSIS

#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);

DESCRIPTION

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.

RETURN VALUE

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.

ERRORS

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.

EXAMPLES

None.

APPLICATION USAGE

These functions are part of the Spawn option and need not be provided on all implementations.

RATIONALE

None.

FUTURE DIRECTIONS

None.

COPYRIGHT

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 .