add sigandset and sigorset (needed for qemu)

include/signal.h

@@ -220,6 +220,9 @@ typedef void (*sig_t)(int);
 typedef void (*sighandler_t)(int);
 void (*bsd_signal(int, void (*)(int)))(int);
 int sigisemptyset(const sigset_t *);
+int sigorset (sigset_t *, sigset_t *, sigset_t *);
+int sigandset(sigset_t *, sigset_t *, sigset_t *);
+
 #define SA_NOMASK SA_NODEFER
 #define SA_ONESHOT SA_RESETHAND
 #endif

src/signal/sigandset.c

+#define _GNU_SOURCE
+#include <signal.h>
+#include <errno.h>
+
+#define SST_SIZE (sizeof(sigset_t) / sizeof(long))
+
+int sigandset(sigset_t *dest, sigset_t *left, sigset_t *right)
+{
+	if(!dest || !left || !right) {
+		errno = EINVAL;
+		return -1;
+	}
+	unsigned long i = 0, *d = (void*) dest, *l = (void*) left, *r = (void*) right;
+	for(; i < SST_SIZE; i++) d[i] = l[i] & r[i];
+	return 0;
+}
+

src/signal/sigorset.c

+#define _GNU_SOURCE
+#include <signal.h>
+#include <errno.h>
+
+#define SST_SIZE (sizeof(sigset_t) / sizeof(long))
+
+int sigorset(sigset_t *dest, sigset_t *left, sigset_t *right)
+{
+	if(!dest || !left || !right) {
+		errno = EINVAL;
+		return -1;
+	}
+	unsigned long i = 0, *d = (void*) dest, *l = (void*) left, *r = (void*) right;
+	for(; i < SST_SIZE; i++) d[i] = l[i] | r[i];
+	return 0;
+}
+