mirror of
https://github.com/fluencelabs/musl
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76fbf6ad4b
the idea here is to avoid advertising signals that don't exist and to make these functions safe to call (e.g. from within other parts of the implementation) on fake sigset_t objects which do not have the HURD padding.
14 lines
259 B
C
14 lines
259 B
C
#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 >= _NSIG-1 || 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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}
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