Add build system scaffolding and libc headers

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libc/signal/killpg.c b/lib/libc/signal/killpg.c
new file mode 100644
index 00000000..27b7a76a
--- /dev/null
+++ b/lib/libc/signal/killpg.c
@@ -0,0 +1,13 @@
+#include <errno.h>
+#include <signal.h>
+#include <syscall.h>
+
+int killpg(pid_t pgrp, int sig)
+{
+	if (pgrp < 0) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	return kill(-pgrp, sig);
+}