musl/src/signal/sigaddset.c

#include <signal.h>
#include <errno.h>

int sigaddset(sigset_t *set, int sig)
{
	unsigned s = sig-1;
	if (s >= _NSIG-1 || sig-32U < 3) {
		errno = EINVAL;
		return -1;
	}
	set->__bits[s/8/sizeof *set->__bits] |= 1UL<<(s&8*sizeof *set->__bits-1);
	return 0;
}
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include <signal.h>`
			`#include <errno.h>`

			`int sigaddset(sigset_t *set, int sig)`
			`{`
			`unsigned s = sig-1;`
change sigset_t functions to restrict to _NSIG 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. 2013-08-09 21:25:29 -04:00			`if (s >= _NSIG-1 \|\| sig-32U < 3) {`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`errno = EINVAL;`
			`return -1;`
			`}`
			`set->__bits[s/8/sizeof set->__bits] \|= 1UL<<(s&8sizeof *set->__bits-1);`
			`return 0;`
			`}`