NAME
posix_spawnattr_init
posix_spawnattr_destroy —
initialize or destroy a spawn
attributes object
SYNOPSIS
#include
<spawn.h>
int
posix_spawnattr_init(posix_spawnattr_t
*attr);
int
posix_spawnattr_destroy(posix_spawnattr_t
*attr);
DESCRIPTION
The
posix_spawnattr_init()
function initializes the object referenced by attr, to an
empty set of spawn attributes for subsequent use in a call to
posix_spawn(2) or
posix_spawnp(2).
A posix_spawnattr_t object is an opaque type that is used to collect set of spawn attributes specified by calls to posix_spawnattr_setflags(3), posix_spawnattr_setpgroup(3), posix_spawnattr_setsigdefault(3), posix_spawnattr_setsigmask(3), posix_spawnattr_setarchpref_np(3), posix_spawnattr_setbinpref_np(3), posix_spawnattr_setspecialport_np(3), or posix_spawnattr_setexceptionports_np(3) such that once the spawn operation is complete, the child process will have a different set of attributes than the parent. The order of these operations is unspecified and may change; programs should not depend on their ordering.
The
posix_spawnattr_destroy()
function destroys the object referenced by attr which was
previously intialized by posix_spawnattr_init(),
returning any resources obtained at the time of initialization to the system
for subsequent reuse. A posix_spawnattr_t may be
reinitialized after having been destroyed, but
must not
be reused after destruction, unless it has been reinitialized.
RETURN VALUES
On success, these functions return 0; on failure they return an
error number from
<errno.h>.
ERRORS
The posix_spawnattr_init() and
posix_spawnattr_destroy() functions will fail and
return an error if:
- [
ENOMEM] - Insufficient resources to initialize the posix_spawnattr_t object.
- [
EINVAL] - The posix_spawnattr_t being destroyed is invalid.
SEE ALSO
posix_spawn(2), posix_spawnp(2), posix_spawnattr_setflags(3), posix_spawnattr_setpgroup(3), posix_spawnattr_setsigdefault(3), posix_spawnattr_setsigmask(3), posix_spawnattr_setbinpref_np(3), posix_spawnattr_setspecialport_np(3), posix_spawnattr_setexceptionports_np(3)
STANDARDS
Version 3 of the Single UNIX Specification (“SUSv3”) [SPN]
HISTORY
The posix_spawn() and
posix_spawnp() function calls appeared in
Version 3 of the Single UNIX Specification
(“SUSv3”) [SPN].