POSIX_SPAWNATTR_DESTROY(3C) Standard C Library Functions

NAME

posix_spawnattr_destroy, posix_spawnattr_init - destroy and initialize
spawn attributes object

SYNOPSIS

#include <spawn.h>

int posix_spawnattr_destroy(posix_spawnattr_t *attr);


int posix_spawnattr_init(posix_spawnattr_t *attr);

DESCRIPTION

The posix_spawnattr_destroy() function destroys a spawn attributes
object. A destroyed attr attributes object can be reinitialized using
posix_spawnattr_init(). The results of otherwise referencing the object
after it has been destroyed are undefined. An implementation can cause
posix_spawnattr_destroy() to set the object referenced by attr to an
invalid value.


The posix_spawnattr_init() function initializes a spawn attributes object
attr with the default value for all of the individual attributes used by
the implementation. Results are undefined if posix_spawnattr_init() is
called specifying an already initialized attr attributes object.


A spawn attributes object is of type posix_spawnattr_t (defined in
<spawn.h>) and is used to specify the inheritance of process attributes
across a spawn operation.


No attributes other than those defined by IEEE Std 1003.1-200x are
provided.


The resulting spawn attributes object (possibly modified by setting
individual attribute values), is used to modify the behavior of
posix_spawn(3C) or posix_spawnp(3C). After a spawn attributes object has
been used to spawn a process by a call to posix_spawn() or
posix_spawnp(), any function affecting the attributes object (including
destruction) will not affect any process that has been spawned in this
way.

RETURN VALUES

Upon successful completion, posix_spawnattr_destroy() and
posix_spawnattr_init() return 0. Otherwise, an error number is returned
to indicate the error.

ERRORS

The posix_spawnattr_init() function will fail if:

ENOMEM
Insufficient memory exists to initialize the spawn attributes
object.


The posix_spawnattr_destroy() function may fail if:

EINVAL
The value specified by attr is invalid.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO

posix_spawn(3C), posix_spawnattr_getflags(3C),
posix_spawnattr_getpgroup(3C), posix_spawnattr_getschedparam(3C),
posix_spawnattr_getschedpolicy(3C), posix_spawnattr_getsigdefault(3C),
posix_spawnattr_getsigmask(3C), attributes(7), standards(7)

January 30, 2004 POSIX_SPAWNATTR_DESTROY(3C)