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Linux系统调用

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<TITLE>Syscall specifications of Linux - vhangup</TITLE>
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<H2><A NAME="SEC112" HREF="syscalls_toc.html#SEC112" tppabs="http://personal.xfol.com/%7erezaie/syscall/syscalls_toc.html#SEC112">vhangup</A></H2>
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<H3>SYNOPSIS</H3>
<P>
<CODE>int vhangup(void);</CODE>
 
<H3>DESCRIPTION</H3>
<P>
Simulates a hang up on the current terminal.
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<H3>RETURN VALUE</H3>
<P>
On success zero is returned. On error -1 is returned and <CODE>errno</CODE> is
set to <CODE>EPERM</CODE>: the calling taks does not have superuser privileges.
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