shithub: front

ref: c28f07b5840216c4e83e1d3b21d8a9ed7c41f8f9
dir: /sys/src/ape/lib/ap/plan9/sigprocmask.c/

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

sigset_t _psigblocked;

int
sigprocmask(int how, sigset_t *set, sigset_t *oset)
{
	if(oset)
		*oset = _psigblocked;
	if(how==SIG_BLOCK)
		_psigblocked |= *set;
	else if(how==SIG_UNBLOCK)
		_psigblocked &= ~*set;
	else if(how==SIG_SETMASK)
		_psigblocked = *set;
	else{
		errno = EINVAL;
		return -1;
	}
	return 0;
}