add sysctl()

2 files changed, 29 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index b6e497a..e71ad20 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,7 @@ LIBGCOMPAT_SRC = \
 	libgcompat/stdio.c		\
 	libgcompat/stdlib.c		\
 	libgcompat/string.c		\
+	libgcompat/sysctl.c		\
 	libgcompat/version.c
 LIBGCOMPAT_OBJ = ${LIBGCOMPAT_SRC:.c=.o}
 LIBGCOMPAT_SOVERSION = 0
diff --git a/libgcompat/sysctl.c b/libgcompat/sysctl.c
new file mode 100644
index 0000000..5671055
--- /dev/null
+++ b/libgcompat/sysctl.c
@@ -0,0 +1,28 @@
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+
+struct __sysctl_args {
+	int *name;
+	int nlen;
+	void *oldval;
+	size_t *oldlenp;
+	void *newval;
+	size_t newlen;
+};
+
+
+int sysctl (int *name, int nlen, void *oldval, size_t *oldlenp, void *newval, size_t newlen) {
+	struct __sysctl_args args = {
+		.name = name,
+		.nlen = nlen,
+		.oldval = oldval,
+		.oldlenp = oldlenp,
+		.newval = newval,
+		.newlen = newlen
+	};
+
+	return syscall(SYS__sysctl, &args);
+}