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POSIX_SPAWN_FILE_ACTI... BSD Library Functions Manual POSIX_SPAWN_FILE_ACTI...
NAME
posix_spawn_file_actions_init posix_spawn_file_actions_destroy -- initialize or destroy spawn file
actions objects
SYNOPSIS
#include <spawn.h>
int
posix_spawn_file_actions_init(posix_spawn_file_actions_t *file_actions);
int
posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *file_actions);
DESCRIPTION
The posix_spawn_file_actions_init() function initializes the object referenced by file_actions, to an
empty set of file actions for subsequent use in a call to posix_spawn(2) or posix_spawnp(2). A
posix_spawn_file_actions_t object is an opaque type that is used to collect set of file actions speci-fied specified
fied by calls to posix_spawn_file_actions_addclose(3) and posix_spawn_file_actions_addopen(3) such that
once the spawn operation is complete, the child process will have a different set of file descriptors
than the parent, in the order that the operations were added to the posix_spawn_file_actions_t.
Additionally, any descriptor in the parent not modified by a file action, and which has the FD_CLOEXEC
flag set, will be closed in the child.
The posix_spawn_file_actions_destroy() function destroys the object referenced by file_actions which
was previously intialized by posix_spawn_file_actions_init(), returning any resources obtained at the
time of initialization to the system for subsequent reuse. A posix_spawn_file_actions_t may be reini-tialized reinitialized
tialized 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
These functions will fail and return an error if:
[ENOMEM] Insufficient resources to initialize the posix_spawn_file_actions_t object.
[EINVAL] The posix_spawn_file_actions_t being destroyed is invalid.
SEE ALSO
posix_spawn(2), posix_spawnp(2), posix_spawn_file_actions_addclose(3),
posix_spawn_file_actions_addopen(3), posix_spawn_file_actions_adddup2(3)
STANDARDS
Version 3 of the Single UNIX Specification (``SUSv3'') [SPN]
HISTORY
The posix_spawn_file_actions_init() and posix_spawn_file_actions_destroy() function calls appeared in
Version 3 of the Single UNIX Specification (``SUSv3'') [SPN].
Mac OS X August 22, 2007 Mac OS X
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