merge sources into single tree

1 files changed, 42 insertions, 0 deletions

diff --git a/src/signal/signal.c b/src/signal/signal.c
new file mode 100644
index 00000000..373fddc5
--- /dev/null
+++ b/src/signal/signal.c
@@ -0,0 +1,42 @@
+#if defined _POSIX_SOURCE
+#include "sys/types.h"
+#endif
+
+#include <signal.h>
+
+/** set a signal handler **/
+void (*signal(int sig, void (*func)(int)))(int)
+{
+	(void)sig;
+	/* TODO */
+	/*
+	RETURN_SUCCESS(a pointer to the signal handler);
+	RETURN_FAILURE(CONSTANT(SIG_ERR), the request could not be honored);
+	*/
+	return func;
+}
+
+/***
+sets the signal handler for the signal specified by ARGUMENT(sig) to
+ARGUMENT(func).
+
+Specifying CONSTANT(SIG_DFL) for ARGUMENT(func) resets the signal handler
+to its default behavior.
+
+Specifying CONSTANT(SIG_IGN) for ARGUMENT(func) causes the signal
+ARGUMENT(sig) to be ignored.
+
+Otherwise, ARGUMENT(func) must be a pointer to a function which takes a
+single TYPE(int) argument and does not return a value. 
+***/
+
+/*
+UNDEFINED(A signal handler for CONSTANT(SIGFPE) returns)
+UNDEFINED(A signal handler calling standard library functions other than THIS() if the signal occurs as other than as a result of calling FUNCTION(abort) or FUNCTION(raise))
+UNDEFINED(FIXME: some function calls from signal handlers)
+IMPLEMENTATION(Whether signal blocking is performed when a signal occurs)
+IMPLEMENTATION(Other signals corresponding to computation exceptions for which signal handlers must not return)
+*/
+/*
+STDC(1)
+*/