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- #include <errno.h>
- #include <signal.h>
- int sigsetmask (int mask)
- {
- register unsigned int sig;
- sigset_t set, oset;
- if (__sigemptyset (&set) < 0)
- return -1;
- if (sizeof (mask) == sizeof (set))
- *(int *) &set = mask;
- else if (sizeof (unsigned long int) == sizeof (set))
- *(unsigned long int *) &set = (unsigned int) mask;
- else
- for (sig = 1; sig < NSIG && sig <= sizeof (mask) * 8; ++sig)
- if ((mask & sigmask (sig)) && __sigaddset (&set, sig) < 0)
- return -1;
- if (sigprocmask (SIG_SETMASK, &set, &oset) < 0)
- return -1;
- if (sizeof (mask) == sizeof (oset))
- mask = *(int *) &oset;
- else if (sizeof (unsigned long int) == sizeof (oset))
- mask = *(unsigned long int *) &oset;
- else
- for (sig = 1, mask = 0; sig < NSIG && sig <= sizeof (mask) * 8; ++sig)
- if (__sigismember (&oset, sig))
- mask |= sigmask (sig);
- return mask;
- }
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