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edb48d1c344c4b585bb885743208ea3fbaae8a3d
[musl]
/
sigaddset.c
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#include <signal.h>
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#include <errno.h>
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int sigaddset(sigset_t *set, int sig)
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{
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unsigned s = sig-1;
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if (s >= 8*sizeof(sigset_t) || sig-32U<3) {
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errno = EINVAL;
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return -1;
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}
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set->__bits[s/8/sizeof *set->__bits] |= 1UL<<(s&8*sizeof *set->__bits-1);
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return 0;
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}