Advanced Programming in the UNIX® Environment

ptg10805159

846 Function Prototypes Appendix A

int access(const char *path,intmode);

<unistd.h> p. 102

mode:R_OK, W_OK, X_OK, F_OK

Returns: 0 if OK,−1 on error

int aio_cancel(intfd,struct aiocb *aiocb);

<aio.h> p. 514

Returns:AIO_ALLDONE,AIO_CANCELED,

AIO_NOTCANCELED,or−1 on error

int aio_error(const struct aiocb *aiocb);

<aio.h> p. 513

Returns: 0 if operation succeeded,EINPROGRESSif

operation is still in progress, error code if

operation failed, or−1 on error

int aio_fsync(intop,struct aiocb *aiocb);

<aio.h> p. 513

Returns: 0 if OK,−1 on error

int aio_read(struct aiocb *aiocb);

<aio.h> p. 512

Returns: 0 if OK,−1 on error

ssize_t aio_return(const struct aiocb *aiocb);

<aio.h> p. 513

Returns: result of asynchronous operation,−1 on error

int aio_suspend(const struct aiocb *constlist[], intnent,

const struct timespec *timeout);

<aio.h> p. 514

Returns: 0 if OK,−1 on error

int aio_write(struct aiocb *aiocb);

<aio.h> p. 512

Returns: 0 if OK,−1 on error

unsigned

int alarm(unsigned intseconds);

<unistd.h> p. 338

Returns: 0 or number of seconds until previously set alarm

int atexit(void (*func)(void));

<stdlib.h> p. 200

Returns: 0 if OK, nonzero on error