SIGPROCMASK(2)							System Calls Manual						    SIGPROCMASK(2)

NAME

       sigprocmask - manipulate the signal mask

SYNOPSIS

       #include <signal.h>

       int sigprocmask(int how, const sigset_t *set, sigset_t *oset)

DESCRIPTION

       Sigprocmask()  examines	or  manipulates  the  signal  mask.  This mask is the set of signals that are currently blocked.  The how argument
       determines the action that must be performed.  In all cases the signal set referenced by oset, if not NULL, will be used to receive the old
       signal mask.  The set argument, if not NULL, will be used to set or modify the current signal mask.

       How can be one of:

       SIG_BLOCK      Add the signals referenced by set to the mask.

       SIG_UNBLOCK    Remove the signals referenced by set from the mask.

       SIG_SETMASK    Set the signal mask to the set referenced by set.

       The value of how is ignored if set is NULL.

SEE ALSO

       sigaction(2), sigpending(2), sigsuspend(2), sigset(3).

DIAGNOSTICS

       Returns 0 on success and -1 on error.  The error code is EFAULT for a bad set or oset address, or EINVAL for a bad how argument.

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																    SIGPROCMASK(2)