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Linux系统调用

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<TITLE>Syscall specifications of Linux - readlink</TITLE>
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<H2><A NAME="SEC26" HREF="syscalls_toc.html#SEC26" tppabs="http://personal.xfol.com/%7erezaie/syscall/syscalls_toc.html#SEC26">readlink</A></H2>
<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>int readlink(const char *<VAR>path</VAR>, char *<VAR>buf</VAR>, size_t
<VAR>bufsiz</VAR>);</CODE>
<P>
<H3>PARAMETERS</H3>
<P>
<VAR>path</VAR>: [in] points to the symlink to read.
<P>
<VAR>buf</VAR>: [out] points to the buffer where to put the information.
<P>
<VAR>bufsiz</VAR>: [in] the maximum size of the buffer.
<P>
<H3>DESCRIPTION</H3>
<P>
Reads the content of a symlink.
<P>
<H3>RETURN VALUE</H3>
<P>
On success, returns the number of bytes read. On error, returns -1 and
sets <CODE>errno</CODE> to one of the following value:
<P>
<UL>
<LI><CODE>EINVAL</CODE>: the path contains a character outside the [0,127]
range or the file is not a symlink.
<LI><CODE>ENOTDIR</CODE>, <CODE>ENAMETOOLONG</CODE>, <CODE>ENOENT</CODE>,
<CODE>EACCESS</CODE>, <CODE>ELOOP</CODE>, <CODE>EIO</CODE> or <CODE>EFAULT</CODE>.
</UL>
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