Add build system scaffolding and libc headers

1 files changed, 24 insertions, 0 deletions

diff --git a/lib/libc/sem/semctl.c b/lib/libc/sem/semctl.c
new file mode 100644
index 00000000..78a1adf8
--- /dev/null
+++ b/lib/libc/sem/semctl.c
@@ -0,0 +1,24 @@
+#include <stdarg.h>
+#include <stddef.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <syscall.h>
+
+int semctl(int semid, int semnum, int cmd, ...)
+{
+	va_list ap;
+	struct semid_ds *buf = NULL;
+
+	switch (cmd) {
+	case SETVAL:
+	case GETALL:
+	case SETALL:
+	case IPC_SET:
+	case IPC_STAT:
+		va_start(ap, cmd);
+		buf = va_arg(ap, struct semid_ds *);
+		va_end(ap);
+	}
+
+	return syscall(semctl, semid, semnum, cmd, buf);
+}