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NetBSD 6.1.5 - man page for pthread_sigmask (netbsd section 3)

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

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

     POSIX Threads Library (libpthread, -lpthread)

     #include <signal.h>

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

     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 sig-
     nal mask.

     If successful, pthread_sigmask() returns 0.  Otherwise, an error is returned.

     pthread_sigmask() shall fail if:

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

     sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2), sigwait(2), sigsetops(3)

     The function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BSD					   July 9, 2010 				      BSD
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