📄 posix-input-and-output.html
字号:
<!-- Copyright (C) 2003 Red Hat, Inc. --><!-- This material may be distributed only subject to the terms --><!-- and conditions set forth in the Open Publication License, v1.0 --><!-- or later (the latest version is presently available at --><!-- http://www.opencontent.org/openpub/). --><!-- Distribution of the work or derivative of the work in any --><!-- standard (paper) book form is prohibited unless prior --><!-- permission is obtained from the copyright holder. --><HTML><HEAD><TITLE>Input and Output [POSIX Section 6]</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="POSIX Standard Support"HREF="posix-standard-support.html"><LINKREL="PREVIOUS"TITLE="Files and Directories [POSIX Section 5]"HREF="posix-files-and-directories.html"><LINKREL="NEXT"TITLE="Device and Class Specific Functions [POSIX Section 7]"HREF="posix-device-and-class-specific-functions.html"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="posix-files-and-directories.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 31. POSIX Standard Support</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="posix-device-and-class-specific-functions.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="POSIX-INPUT-AND-OUTPUT">Input and Output [POSIX Section 6]</H1><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN13062">Functions Implemented</H2><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">int dup( int fd ); int dup2( int fd, int fd2 ); int close(int fd); ssize_t read(int fd, void *buf, size_t nbyte); ssize_t write(int fd, const void *buf, size_t nbyte); int fcntl( int fd, int cmd, ... ); off_t lseek(int fd, off_t offset, int whence); int fsync( int fd );int fdatasync( int fd );</PRE></TD></TR></TABLE></DIV><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN13065">Functions Omitted</H2><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">int pipe( int fildes[2] ); int aio_read( struct aiocb *aiocbp ); // TBA int aio_write( struct aiocb *aiocbp ); // TBA int lio_listio( int mode, struct aiocb *const list[], int nent, struct sigevent *sig); // TBA int aio_error( struct aiocb *aiocbp ); // TBA int aio_return( struct aiocb *aiocbp ); // TBA int aio_cancel( int fd, struct aiocb *aiocbp ); // TBA int aio_suspend( const struct aiocb *const list[], int nent, const struct timespec *timeout ); // TBA int aio_fsync( int op, struct aiocb *aiocbp );// TBA</PRE></TD></TR></TABLE></DIV><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN13068">Notes</H2><P></P><UL><LI><P> Only the <SPANCLASS="emphasis"><ICLASS="EMPHASIS">F_DUPFD</I></SPAN> command of <SPANCLASS="emphasis"><ICLASS="EMPHASIS">fcntl()</I></SPAN> is currently implemented. </P></LI><LI><P> Most of the functionality of these functions depends on the underlying filesystem. </P></LI></UL></DIV></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="posix-files-and-directories.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="posix-device-and-class-specific-functions.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Files and Directories [POSIX Section 5]</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="posix-standard-support.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">Device and Class Specific Functions [POSIX Section 7]</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -