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PTHREAD_SIGMASK(3)	 BSD Library Functions Manual	    PTHREAD_SIGMASK(3)

NAME
     pthread_sigmask --	examine	and/or change a	thread's signal	mask

LIBRARY
     POSIX Threads Library (libpthread,	-lpthread)

SYNOPSIS
     #include <pthread.h>
     #include <signal.h>

     int
     pthread_sigmask(int how, const sigset_t * restrict	set,
	 sigset_t * restrict oset);

DESCRIPTION
     The pthread_sigmask() function examines and/or changes the	calling
     thread's signal mask.

     If	set is not NULL, it specifies a	set of signals to be modified, and how
     specifies what to set the signal mask to:

     SIG_BLOCK	  Union	of the current mask and	set.

     SIG_UNBLOCK  Intersection of the current mask and the complement of set.

     SIG_SETMASK  set.

     If	oset is	not NULL, the previous signal mask is stored in	the location
     pointed to	by oset.

     SIGKILL and SIGSTOP cannot	be blocked, and	will be	silently ignored if
     included in the signal mask.

RETURN VALUES
     If	successful, pthread_sigmask() returns 0.  Otherwise, an	error is re-
     turned.

ERRORS
     The pthread_sigmask() function will fail if:

     [EINVAL]		how is not one of the defined values.

SEE ALSO
     sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2), sigsetops(3)

STANDARDS
     The pthread_sigmask() function conforms to	ISO/IEC	9945-1:1996
     ("POSIX.1")

BSD			       February	19, 2011			   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS

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