WRITE(2)

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CIT Forum CD-ROM

WRITE(2)

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write - ��

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        int write (fildes, buf, nbyte)
        int fildes;
        char *buf;
        unsigned nbyte;

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�� fildes - �� , �� creat(2), open(2), dup(2), fcntl(2) �� pipe(2).

�� write �� nbyte �� , �� buf, � ��, �� fildes.

�� , �� , �� write �� , �� , �� fildes. �� .

�� . �� .

�� O_APPEND, �� .

�� , �� O_SYNC, �� write �� , �� . �� , � �� . �� , �� O_SYNC, �� write �� , �� .

�� , �� [��. chmod(2)] � �� , � �� , �� . � �� , �� O_NDELAY, �� .

�� [��. intro(2)] �� write �� nbyte ("�� "), �� . �� , �� . �� [��. �� I_PUSH � streamio(7)], �� . �� nbyte �� , �� nbyte ��, �� nbyte �� 0, �� write �� (�� ). �� nbyte �� 0, �� write �� ERANGE. �� (�� nbyte �� 0) �� .

�� , �� O_NDELAY �� (�� ), �� , �� . �� O_NDELAY �� , � � �� write �� . �� O_NDELAY �� , �� , � �� , �� , �� write �� .

�� write �� , �� :

[EAGAIN]: �� O_NDELAY, � �� .
[EAGAIN]: �� , �� /��, �� .
[EAGAIN]: �� O_NDELAY �� , �� .
[EBADF]: �� fildes �� , �� .
[EDEADLK]: �� .
[EFAULT]: �� buf �� .
[EFBIG]: �� [��. ulimit(2)].
[EINTR]: �� .
[EINVAL]: �� , �� .
[ENOLCK]: �� .
[ENOLINK]: Fildes �� , �� .
[ENOSPC]: �� .
[ENXIO]: �� stream.
[EPIPE �� SIGPIPE] �� , �� -�� .
[ERANGE]: �� nbyte, �� , �� .

�� , �� [��. ulimit(2)] �� , �� , �� . ��, �� 20 �� . �� 512 �� , �� 20 �� write �� 20. �� (�� , �� ).

�� O_NDELAY �� 0. �� O_NDELAY �� , �� , �� .

�� -�� , �� . �� errno �� , �� .

��. ��
creat(2), dup(2), fcntl(2), intro(2), lseek(2), open(2), pipe(2), ulimit(2).