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/*
* Copyright (c) 2009 by
* Ralf Corsépius, Ulm, Germany. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
#include <signal.h>
int
main (void)
{
int status;
sigset_t set1, set2;
status = sigprocmask (SIG_BLOCK, &set1, &set2);
status = sigprocmask (SIG_UNBLOCK, &set1, &set2);
status = sigprocmask (SIG_SETMASK, &set1, &set2);
return 0;
}
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