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28 .\" $FreeBSD: src/lib/libc_r/man/pthread_sigmask.3,v 1.3.2.6 2001/12/17 10:08:26 ru Exp $
29 .\" $DragonFly: src/lib/libc_r/man/pthread_sigmask.3,v 1.3 2007/09/08 20:50:50 swildner Exp $
35 .Nd examine and/or change a thread's signal mask
42 .Fn pthread_sigmask "int how" "const sigset_t *set" "sigset_t *oset"
46 function examines and/or changes the calling thread's signal mask.
52 it specifies a set of signals to be modified, and
54 specifies what to set the signal mask to:
55 .Bl -tag -width ".Dv SIG_UNBLOCK"
57 Union of the current mask and
60 Intersection of the current mask and the complement of
68 is not NULL, the previous signal mask is stored in the location pointed to by
74 cannot be blocked, and will be silently ignored if included in the signal mask.
79 Otherwise, an error is returned.
86 is not one of the defined values.