syscalls_97.html

Linux系统调用

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<TITLE>Syscall specifications of Linux - reboot</TITLE>
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<H2><A NAME="SEC97" HREF="syscalls_toc.html#SEC97" tppabs="http://personal.xfol.com/%7erezaie/syscall/syscalls_toc.html#SEC97">reboot</A></H2>
<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>int reboot(int <VAR>magic</VAR>, int <VAR>magic_too</VAR>, int <VAR>flag</VAR>);</CODE>
 
<H3>PARAMETERS</H3>
<P>
<VAR>magic</VAR>: [in] <CODE>0xfee1dead</CODE>.
<P>
<VAR>magic_too</VAR>: [in] <CODE>672274793</CODE>.
<P>
<VAR>flag</VAR>: [in] see description.
 
<H3>DESCRIPTION</H3>
<P>
Reboots the machine or enable the Ctrl-Alt-Del combinaison. <VAR>magic</VAR>
must be <CODE>0xfee1dead</CODE> and <VAR>magic_too</VAR> must be <CODE>672274793</CODE>.
If those two conditions are true, then the following values of
<VAR>flag</VAR> perform the specified operations:
<P>
<DL COMPACT>
<DT><CODE>0x1234567</CODE>
<DD>preform a hard reset.
<P>
<DT><CODE>0x89abcdef</CODE>
<DD>Ctrl-Alt-Del is enabled.
<P>
<DT><CODE>0</CODE>
<DD>Ctrl-Atl-Del is disabled and a signal is send to <CODE>init</CODE>.
</DL>
<P>
Does not sync!!! The calling task must have superuser privileges.
<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>EINVAL</CODE>: the value of <VAR>magic</VAR>, <VAR>magic_too</VAR> or
<VAR>flag</VAR> is invalid.
<LI><CODE>EPERM</CODE>: the calling task does not have superuser privileges.
</UL>
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