Import sources from 2011-03-30 iso image

1 files changed, 67 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/posix/sigset.c b/sys/src/ape/lib/ap/posix/sigset.c
new file mode 100755
index 000000000..1a9ef12aa
--- /dev/null
+++ b/sys/src/ape/lib/ap/posix/sigset.c
@@ -0,0 +1,67 @@
+#include <signal.h>
+#include <errno.h>
+
+/*
+ * sigsets are 32-bit longs.  if the 2<<(i-1) bit is on,
+ * the signal #define'd as i in signal.h is inluded.
+ */
+
+static sigset_t stdsigs = SIGHUP|SIGINT|SIGQUIT|SIGILL|SIGABRT|SIGFPE|SIGKILL|
+		SIGSEGV|SIGPIPE|SIGALRM|SIGTERM|SIGUSR1|SIGUSR2;
+
+#define BITSIG(s) (2<<(s))
+
+int
+sigemptyset(sigset_t *set)
+{
+	*set = 0;
+	return 0;
+}
+
+int
+sigfillset(sigset_t *set)
+{
+	*set = stdsigs;
+	return 0;
+}
+
+int
+sigaddset(sigset_t *set, int signo)
+{
+	int b;
+
+	b = BITSIG(signo);
+	if(!(b&stdsigs)){
+		errno = EINVAL;
+		return -1;
+	}
+	*set |= b;
+	return 0;
+}
+
+int
+sigdelset(sigset_t *set, int signo)
+{
+	int b;
+
+	b = BITSIG(signo);
+	if(!(b&stdsigs)){
+		errno = EINVAL;
+		return -1;
+	}
+	*set &= ~b;
+	return 0;
+}
+
+int
+sigismember(sigset_t *set, int signo)
+{
+	int b;
+
+	b = BITSIG(signo);
+	if(!(b&stdsigs)){
+		errno = EINVAL;
+		return -1;
+	}
+	return (b&*set)? 1 : 0;
+}