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Linux系统调用

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<TITLE>Syscall specifications of Linux - utime</TITLE>
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<H2><A NAME="SEC34" HREF="syscalls_toc.html#SEC34" tppabs="http://personal.xfol.com/%7erezaie/syscall/syscalls_toc.html#SEC34">utime</A></H2>
<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>int utime(const char *<VAR>filename</VAR>, struct utimbuf *<VAR>buf</VAR>);</CODE>
<P>
<H3>PARAMETERS</H3>
<P>
<VAR>filename</VAR>: [in] points to the path of the file to change.
<P>
<VAR>buf</VAR>: [in] points to the new times.
<P>
<H3>DESCRIPTION</H3>
<P>
Changes the access and modification times of a inode. The <CODE>utimbuf</CODE>
structure has the following layout:
<P>
<PRE>
struct utimbuf {
        time_t actime;  /* access time */
        time_t modtime; /* modification time */
};
</PRE>
<P>
If <VAR>buf</VAR> is <CODE>NULL</CODE> the times are set to the current time.
<P>
<H3>RETURN VALUE</H3>
<P>
On success, returns zero. On error, returns -1 and sets <CODE>errno</CODE> to
one of the following value:
<P>
<UL>
<LI><CODE>EROFS</CODE>, <CODE>ENOTDIR</CODE>, <CODE>ENOENT</CODE>, <CODE>EFAULT</CODE>,
<CODE>ENAMETOOLONG</CODE>, <CODE>ELOOP</CODE>, <CODE>EACCESS</CODE>, <CODE>EPERM</CODE>.
</UL>
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