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Minix/CD-ROM-2.0/MINIX/MANUALS/CAT2/SIGPROCM.2

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+SIGPROCMASK(2)            Minix Programmer's Manual             SIGPROCMASK(2)
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+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.
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+     SIG_UNBLOCK    Remove the signals referenced by set from the mask.
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+     SIG_SETMASK    Set the signal mask to the set referenced by set.
+
+     The value of how is ignored if set is NULL.
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+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.
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+AUTHOR
+     Kees J. Bot (kjb@cs.vu.nl)
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+                                                                             1
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