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Linux系统调用

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<TITLE>Syscall specifications of Linux - sgetmask</TITLE>
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<H2><A NAME="SEC100" HREF="syscalls_toc.html#SEC100" tppabs="http://personal.xfol.com/%7erezaie/syscall/syscalls_toc.html#SEC100">sgetmask and ssetmask</A></H2>
<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>sigset_t sgetmask(void);</CODE>
<P>
<CODE>sigset_t ssetmask(sigset_t <VAR>mask</VAR>);</CODE>
<P>
<H3>PARAMETERS</H3>
<P>
<VAR>mask</VAR>: [in] the new signal mask.
<P>
<H3>DESCRIPTION</H3>
<P>
<CODE>sgetmask</CODE> retreives the signal mask of the current task and
<CODE>ssetmask</CODE> sets it to <VAR>mask</VAR>. A signal is blocked by setting
the bit corresponding to the signal number in <VAR>mask</VAR>.
<P>
<H3>RETURN VALUE</H3>
<P>
Both calls return the signal mask at the time of the call (that means,
in the case of <CODE>ssetmask</CODE> before modifying it).
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