PTHREADSIGMASK(2) BSD System Calls Manual PTHREADSIGMASK(2)

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

SYNOPSIS
     ##iinncclluuddee <>

     int
     pptthhrreeaaddssiiggmmaasskk(int how, const sigsett *restrict set,
         sigsett *restrict oset);

DESCRIPTION
     The pptthhrreeaaddssiiggmmaasskk() 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:

     SIGBLOCK    Union of the current mask and set.

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

     SIGSETMASK  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, pptthhrreeaaddssiiggmmaasskk() returns 0.  Otherwise, an error is
     returned.

EERRRROORRSS
     pptthhrreeaaddssiiggmmaasskk() will fail if:

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

LEGACY SYNOPSIS
     ##iinncclluuddee <>
     ##iinncclluuddee <>

     The include file  is necessary.

SEE ALSO
     sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2), sigsetops(3),
     compat(5)

STANDARDS
     pptthhrreeaaddssiiggmmaasskk() conforms to ISO/IEC 9945-1:1996 (``POSIX.1'')

BSD                             April 27, 2000                             BSD