Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
SIGSETMASK(2)		      System Calls Manual		 SIGSETMASK(2)

NAME
       sigsetmask, sigblock -- manipulate current signal mask

LIBRARY
       Standard	C Library (libc, -lc)

SYNOPSIS
       #include	<signal.h>

       int
       sigsetmask(int mask);

       int
       sigblock(int mask);

       int
       sigmask(int signum);

DESCRIPTION
       This interface is made obsolete by: sigprocmask(2).

       The sigsetmask()	function sets the current signal mask to the specified
       mask.   Signals	are  blocked from delivery if the corresponding	bit in
       mask is a 1.  The sigblock() function adds the signals in the specified
       mask to	the  current  signal  mask,  rather  than  overwriting	it  as
       sigsetmask()  does.   The  macro	sigmask() is provided to construct the
       mask for	a given	signum.

       The system quietly disallows SIGKILL or SIGSTOP to be blocked.

RETURN VALUES
       The sigblock() and sigsetmask() functions return	the  previous  set  of
       masked signals.

SEE ALSO
       kill(2),	  sigaction(2),	  sigprocmask(2),   sigsuspend(2),  sigvec(2),
       sigsetops(3)

HISTORY
       The sigsetmask()	and sigblock() functions first appeared	in 4.2BSD  and
       have been deprecated.

FreeBSD	8.2			 June 2, 1993			 SIGSETMASK(2)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=sigblock&sektion=2&manpath=FreeBSD+8.2-RELEASE+and+Ports>

home | help