syscalls_35.html

Linux系统调用

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<TITLE>Syscall specifications of Linux - write</TITLE>
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<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>size_t write(int <VAR>fd</VAR>, const char *<VAR>buf</VAR>, size_t <VAR>count</VAR>);</CODE>
 
<H3>PARAMETERS</H3>
<P>
<VAR>fd</VAR>: [in] the file descriptor to read from.
<P>
<VAR>buf</VAR>: [out] the buffer where to store the data read.
<P>
<VAR>count</VAR>: [in] the maximum count of bytes to read.
<P>
<H3>DESCRIPTION</H3>
<P>
Read up to <VAR>count</VAR> bytes form <VAR>fd</VAR>.
<P>
<H3>RETURN VALUE</H3>
<P>
On success, the number of bytes read. On error, returns -1 and sets
<CODE>errno</CODE> to one of the following values:
<P>
<UL>
<LI><CODE>EINVAL</CODE>: the kind of object attached to <VAR>fd</VAR> cannot be
written to.
<LI><CODE>EBADF</CODE>, <VAR>EFAULT</VAR>, <VAR>EPIPE</VAR>, <CODE>EINTR</CODE>,
<CODE>EAGAIN</CODE>, <CODE>ENOSPC</CODE>.
</UL>
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