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Linux系统调用

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<TITLE>Syscall specifications of Linux - chroot</TITLE>
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<H2><A NAME="SEC8" HREF="syscalls_toc.html#SEC8" tppabs="http://personal.xfol.com/%7erezaie/syscall/syscalls_toc.html#SEC8">chroot</A></H2>
<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>int chroot(const char *<VAR>path</VAR>);</CODE>
<P>
<H3>PARAMETERS</H3>
<P>
<VAR>path</VAR>: [in] points to the new root.
<P>
<H3>DESCRIPTION</H3>
<P>
Changes the root directory for the current task and all its children to
the path specified by <VAR>path</VAR>. This operation is privilegied and only
the superuser can invoke it successfully.
<P>
<H3>RETURN VALUE</H3>
<P>
On success zero is returned. On error, -1 is returned and <CODE>errno</CODE> is
set to one of the following values:
<P>
<UL>
<LI><CODE>EPERM</CODE>: the effective uid of the task is not equal the the
uid of the file and the task does not have superuser privileges.
<LI><CODE>ENOTDIR</CODE>, <CODE>EACCESS</CODE>, <CODE>EFAULT</CODE>, <CODE>ENOENT</CODE>,
<CODE>ENOMEM</CODE> <CODE>ENAMETOOLONG</CODE>, <CODE>EROFS</CODE> or <CODE>ELOOP</CODE>.
</UL>
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