READV

Section: �� α׷�� Ŵ�� (2)
Updated: 1999�� 1�� 20��
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readv, writev - ��͸� �аų� ��.

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#include <sys/uio.h>

int readv(int fd, const struct iovec * vector, int count);

int writev(int fd, const struct iovec * vector, int count);

struct iovec {

__ptr_t iov_base; /* �� ּ� */

size_t iov_len; /* ��Ʈ�� */
};

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readv �� fd �� ͸� �а�, �׸�� vector �� Ű�� ִ� ��ۿ� �ִ´�. �� ڴ� count �� ȴ�. ��۴� �� ä��. ��Ͱ� �� ſ� vector �� ־��°�� ϰ� read ó�� ۵��Ѵ�.

writev �� vector �� Ű�� ִ� ��ۿ�� fd �� ͸� ��. �� ڴ� count �� ȴ�. ��۴� �� ȴ�. ��͸� �� ſ� vector �� °�� ϰ� write ó�� ۵��Ѵ�.

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��, readv �� Ʈ�� ȯ�Ѵ�. ��, writev �� Ʈ�� ȯ�Ѵ�. ��, -1�� ϵǰ� errno �� ȴ�.

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EINVAL: ��ȿ�� ڰ� �־��. �� count �� MAX_IOVEC, �Ǵ� 0�� ũ��. fd �� аų�(readv) ��(writev) �� ˸�� ü�� Ǿ� �ִ�.
EFAULT: "Segmentation fault." ��ü�� vector �� iov_base �� ͵�� ùٸ�� Ҵ�� ޸𸮸� ��Ű�� ִ�.
EBADF: �� fd �� ȿ�� ʴ�.
EINTR: �Լ��  ��͸� �а� �� ȣ�� ͷ�Ʈ�Ǿ��.
EAGAIN: Non-blocking I/O �� O_NONBLOCK �� Ͽ� ��õǾ� �� б� �� ̿��Ҽ� �ִ� ��Ͱ� ��. (�Ǵ� �� fd�� ִ� ��ü�� ̴�.)
EISDIR: fd �� 丮�� Ų��.
EOPNOTSUP: fd �� б�/��Ⱑ �� ʴ� ��̳� ��ġ�� Ų��.
ENOMEM: �̿��Ҽ� �ִ� Ŀ�� ޸𸮰� �� ʴ�.

fd �� ü�� Ͽ� �ٸ� �� ߻��Ҽ� �ִ�.

ȣȯ

4.4BSD ( readv �׸�� writev �Լ�� BSD 4.2�� ó�� Ÿ��), Unix98. Linux libc5 �� count �� Ÿ��ν� size_t �� Ͽ��. �̰�� Ÿ�� ǥ�� ƴϴ�.

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read(2), write(2), fprintf(3), fscanf(3)

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�� <skyeyes@soback.kornet.net>, 2000�� 8�� 7��

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Time: 08:07:01 GMT, March 25, 2004

READV

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