posix_spawn_file_actions_init()

QNX SDP8.0C Library ReferenceAPIDeveloper

Initialize a spawn file actions object

Synopsis:

#include <spawn.h>

int posix_spawn_file_actions_init(
       posix_spawn_file_actions_t *fact_p);

Arguments:

fact_p
A pointer to the spawn file action object that you want to initialize.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The posix_spawn_file_actions_init() function initializes the object referenced by fact_p to contain no file actions for posix_spawn() or posix_spawnp() to perform. For information about destroying a spawn file actions object, see posix_spawn_file_actions_destroy().

A spawn file actions object is an opaque data type that specifies a series of close(), dup2(), and open() actions to be performed by a posix_spawn() or posix_spawnp() operation in order to arrive at the set of open file descriptors for the child process, given the parent's set of open file descriptors. For more information, see posix_spawn().

Note:
Don't reinitialize a posix_spawn_file_actions_t object without destroying it. Repeated calls to posix_spawn_file_actions_init() with the same posix_spawn_file_actions_t object could result in a memory leak. In the QNX OS implementation, all get and set operations, as well as posix_spawn(), return EINVAL when attempting to reference a destroyed file actions object.

Returns:

EOK
Success.
EINVAL
An argument was invalid.
ENOMEM
Insufficient memory exists to initialize the spawn file actions object.

Classification:

POSIX 1003.1 SPN

Safety:
Cancellation point No
Signal handler Yes
Thread Yes
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