posix_spawnattr_init()
QNX SDP8.0C Library ReferenceAPIDeveloper
Initialize a spawn attributes object
Synopsis:
#include <spawn.h>
int posix_spawnattr_init( posix_spawnattr_t *attrp );
Arguments:
- attrp
- A pointer to the spawn attributes 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_spawnattr_init() function initializes the given spawn attributes object with the default values for all attributes. A spawn attributes object is an opaque object of type posix_spawnattr_t (defined in <spawn.h>) that you can use to modify the behavior of posix_spawn() or posix_spawnp(). Changes that you make to the object don't affect any processes that you've already spawned.
After initializing a spawn attributes object and using it to create child processes as needed, you must call posix_spawnattr_destroy() to properly free the object's memory.
CAUTION:
- The posix_spawnattr_destroy() function renders the posix_spawnattr_t object unusable. You can reuse it, but you must first reinitialize the object by calling posix_spawnattr_init() again.
- POSIX indicates that the results of reinitializing an already initialized posix_spawnattr_t object are undefined. The QNX OS implementation doesn't support the reinitialization of such an object without an intervening destruction of the object. Repeated calls to posix_spawnattr_init() with the same posix_spawnattr_t object could result in a memory leak.
Returns:
- EOK
- Success.
- ENOMEM
- Insufficient memory exists to initialize the spawn attributes object.
Examples:
See posix_spawn().
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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