diff --git a/.clang-format b/.clang-format
index dcdbcaf..bf35450 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,5 +1,5 @@
 BasedOnStyle: LLVM
-IndentWidth: 2
+IndentWidth: 4
 SortIncludes: false
 UseTab: Never
 BreakBeforeBraces: Allman
diff --git a/ext/bsdcontrol.rb/bsdcontrol.c b/ext/bsdcontrol.rb/bsdcontrol.c
index 6c82fe0..dc47971 100644
--- a/ext/bsdcontrol.rb/bsdcontrol.c
+++ b/ext/bsdcontrol.rb/bsdcontrol.c
@@ -5,20 +5,20 @@
 void
 Init_bsdcontrol(void)
 {
-  VALUE rb_mBSD     = rb_const_get(rb_cObject, rb_intern("BSD")),
-        rb_mControl = rb_const_get(rb_mBSD, rb_intern("Control")),
-        rb_cFeature = rb_const_get(rb_mControl, rb_intern("Feature")),
-        rb_cContext = rb_const_get(rb_mControl, rb_intern("Context"));
-  rb_define_alloc_func(rb_cContext, bsdcontrol_context_alloc);
-  rb_define_method(
-      rb_cContext, "library_version", bsdcontrol_context_library_version, 0);
-  rb_define_method(rb_cContext,
-                   "available_features",
-                   bsdcontrol_context_available_features,
-                   0);
-  rb_define_method(rb_cFeature, "status", bsdcontrol_feature_status, 1);
-  rb_define_method(rb_cFeature, "sysdef!", bsdcontrol_feature_sysdef, 1);
-  rb_define_private_method(rb_cFeature, "set!", bsdcontrol_feature_set, 2);
-  rb_define_const(rb_cFeature, "ENABLED", INT2NUM(HBSDCTRL_STATE_ENABLED));
-  rb_define_const(rb_cFeature, "DISABLED", INT2NUM(HBSDCTRL_STATE_DISABLED));
+    VALUE rb_mBSD     = rb_const_get(rb_cObject, rb_intern("BSD")),
+          rb_mControl = rb_const_get(rb_mBSD, rb_intern("Control")),
+          rb_cFeature = rb_const_get(rb_mControl, rb_intern("Feature")),
+          rb_cContext = rb_const_get(rb_mControl, rb_intern("Context"));
+    rb_define_alloc_func(rb_cContext, bsdcontrol_context_alloc);
+    rb_define_method(
+        rb_cContext, "library_version", bsdcontrol_context_library_version, 0);
+    rb_define_method(rb_cContext,
+                     "available_features",
+                     bsdcontrol_context_available_features,
+                     0);
+    rb_define_method(rb_cFeature, "status", bsdcontrol_feature_status, 1);
+    rb_define_method(rb_cFeature, "sysdef!", bsdcontrol_feature_sysdef, 1);
+    rb_define_private_method(rb_cFeature, "set!", bsdcontrol_feature_set, 2);
+    rb_define_const(rb_cFeature, "ENABLED", INT2NUM(HBSDCTRL_STATE_ENABLED));
+    rb_define_const(rb_cFeature, "DISABLED", INT2NUM(HBSDCTRL_STATE_DISABLED));
 }
diff --git a/ext/bsdcontrol.rb/context.c b/ext/bsdcontrol.rb/context.c
index aa3182e..d5e96b7 100644
--- a/ext/bsdcontrol.rb/context.c
+++ b/ext/bsdcontrol.rb/context.c
@@ -10,27 +10,27 @@ static void bsdcontrol_context_free(struct bsdcontrol_ctx_t *);
 VALUE
 bsdcontrol_context_alloc(VALUE klass)
 {
-  hbsdctrl_ctx_t *ctx;
-  struct bsdcontrol_ctx_t *rbctx;
-  ctx   = hbsdctrl_ctx_new(FLAGS, NAMESPACE);
-  rbctx = calloc(1, sizeof(struct bsdcontrol_ctx_t));
-  if (ctx == NULL)
-  {
-    rb_raise(rb_eSystemCallError, "hbsdctrl_ctx_new");
-  }
-  else if (rbctx == NULL)
-  {
-    rb_raise(rb_eSystemCallError, "calloc");
-  }
-  rbctx->ctx = ctx;
-  return Data_Wrap_Struct(klass, NULL, bsdcontrol_context_free, rbctx);
+    hbsdctrl_ctx_t *ctx;
+    struct bsdcontrol_ctx_t *rbctx;
+    ctx   = hbsdctrl_ctx_new(FLAGS, NAMESPACE);
+    rbctx = calloc(1, sizeof(struct bsdcontrol_ctx_t));
+    if (ctx == NULL)
+    {
+        rb_raise(rb_eSystemCallError, "hbsdctrl_ctx_new");
+    }
+    else if (rbctx == NULL)
+    {
+        rb_raise(rb_eSystemCallError, "calloc");
+    }
+    rbctx->ctx = ctx;
+    return Data_Wrap_Struct(klass, NULL, bsdcontrol_context_free, rbctx);
 }
 
 static void
 bsdcontrol_context_free(struct bsdcontrol_ctx_t *rbctx)
 {
-  hbsdctrl_ctx_free(&rbctx->ctx);
-  free(rbctx);
+    hbsdctrl_ctx_free(&rbctx->ctx);
+    free(rbctx);
 }
 
 /*
@@ -41,22 +41,22 @@ bsdcontrol_context_free(struct bsdcontrol_ctx_t *rbctx)
 VALUE
 bsdcontrol_context_available_features(VALUE self)
 {
-  VALUE rb_mBSD     = rb_const_get(rb_cObject, rb_intern("BSD")),
-        rb_mControl = rb_const_get(rb_mBSD, rb_intern("Control")),
-        rb_cFeature = rb_const_get(rb_mControl, rb_intern("Feature")),
-        feature = 0, features = rb_ary_new();
-  hbsdctrl_ctx_t *ctx;
-  char **name;
-  ctx  = bsdcontrol_unwrap(self);
-  name = hbsdctrl_ctx_all_feature_names(ctx);
-  while (*name != NULL)
-  {
-    feature = rb_funcall(
-        rb_cFeature, rb_intern("new"), 2, rb_str_new2(*name), self);
-    rb_ary_push(features, feature);
-    name++;
-  }
-  return features;
+    VALUE rb_mBSD     = rb_const_get(rb_cObject, rb_intern("BSD")),
+          rb_mControl = rb_const_get(rb_mBSD, rb_intern("Control")),
+          rb_cFeature = rb_const_get(rb_mControl, rb_intern("Feature")),
+          feature = 0, features = rb_ary_new();
+    hbsdctrl_ctx_t *ctx;
+    char **name;
+    ctx  = bsdcontrol_unwrap(self);
+    name = hbsdctrl_ctx_all_feature_names(ctx);
+    while (*name != NULL)
+    {
+        feature = rb_funcall(
+            rb_cFeature, rb_intern("new"), 2, rb_str_new2(*name), self);
+        rb_ary_push(features, feature);
+        name++;
+    }
+    return features;
 }
 
 /*
@@ -66,7 +66,7 @@ bsdcontrol_context_available_features(VALUE self)
 VALUE
 bsdcontrol_context_library_version(VALUE self)
 {
-  hbsdctrl_ctx_t *ctx;
-  ctx = bsdcontrol_unwrap(self);
-  return ULONG2NUM(ctx->hc_version);
+    hbsdctrl_ctx_t *ctx;
+    ctx = bsdcontrol_unwrap(self);
+    return ULONG2NUM(ctx->hc_version);
 }
diff --git a/ext/bsdcontrol.rb/feature.c b/ext/bsdcontrol.rb/feature.c
index bbf0c4c..d7d0546 100644
--- a/ext/bsdcontrol.rb/feature.c
+++ b/ext/bsdcontrol.rb/feature.c
@@ -12,29 +12,29 @@
 VALUE
 bsdcontrol_feature_status(VALUE self, VALUE path)
 {
-  int fd;
-  VALUE rbcontext;
-  hbsdctrl_feature_t *feature;
-  hbsdctrl_feature_state_t state;
-  hbsdctrl_ctx_t *ctx;
-  rbcontext = rb_funcall(self, rb_intern("context"), 0);
-  fd        = bsdcontrol_open(path);
-  ctx       = bsdcontrol_unwrap(rbcontext);
-  feature   = bsdcontrol_find_feature(ctx, self);
-  errno     = 0;
-  if (feature->hf_get(ctx, feature, &fd, &state) == RES_FAIL)
-  {
-    close(fd);
-    errno == 0 ? rb_raise(rb_eSystemCallError, "hf_get")
-               : rb_syserr_fail(errno, "hf_get");
-  }
-  else
-  {
-    const char *str;
-    close(fd);
-    str = hbsdctrl_feature_state_to_string(&state);
-    return ID2SYM(rb_intern(str));
-  }
+    int fd;
+    VALUE rbcontext;
+    hbsdctrl_feature_t *feature;
+    hbsdctrl_feature_state_t state;
+    hbsdctrl_ctx_t *ctx;
+    rbcontext = rb_funcall(self, rb_intern("context"), 0);
+    fd        = bsdcontrol_open(path);
+    ctx       = bsdcontrol_unwrap(rbcontext);
+    feature   = bsdcontrol_find_feature(ctx, self);
+    errno     = 0;
+    if (feature->hf_get(ctx, feature, &fd, &state) == RES_FAIL)
+    {
+        close(fd);
+        errno == 0 ? rb_raise(rb_eSystemCallError, "hf_get")
+                   : rb_syserr_fail(errno, "hf_get");
+    }
+    else
+    {
+        const char *str;
+        close(fd);
+        str = hbsdctrl_feature_state_to_string(&state);
+        return ID2SYM(rb_intern(str));
+    }
 }
 
 /*
@@ -43,28 +43,28 @@ bsdcontrol_feature_status(VALUE self, VALUE path)
 VALUE
 bsdcontrol_feature_set(VALUE self, VALUE path, VALUE rbstate)
 {
-  int fd;
-  VALUE rbcontext;
-  hbsdctrl_feature_t *feature;
-  hbsdctrl_ctx_t *ctx;
-  int state;
-  rbcontext = rb_funcall(self, rb_intern("context"), 0);
-  fd        = bsdcontrol_open(path);
-  ctx       = bsdcontrol_unwrap(rbcontext);
-  feature   = bsdcontrol_find_feature(ctx, self);
-  state     = NUM2INT(rbstate);
-  errno     = 0;
-  if (feature->hf_apply(ctx, feature, &fd, &state) == RES_FAIL)
-  {
-    close(fd);
-    errno == 0 ? rb_raise(rb_eSystemCallError, "hf_apply")
-               : rb_syserr_fail(errno, "hf_apply");
-  }
-  else
-  {
-    close(fd);
-    return Qtrue;
-  }
+    int fd;
+    VALUE rbcontext;
+    hbsdctrl_feature_t *feature;
+    hbsdctrl_ctx_t *ctx;
+    int state;
+    rbcontext = rb_funcall(self, rb_intern("context"), 0);
+    fd        = bsdcontrol_open(path);
+    ctx       = bsdcontrol_unwrap(rbcontext);
+    feature   = bsdcontrol_find_feature(ctx, self);
+    state     = NUM2INT(rbstate);
+    errno     = 0;
+    if (feature->hf_apply(ctx, feature, &fd, &state) == RES_FAIL)
+    {
+        close(fd);
+        errno == 0 ? rb_raise(rb_eSystemCallError, "hf_apply")
+                   : rb_syserr_fail(errno, "hf_apply");
+    }
+    else
+    {
+        close(fd);
+        return Qtrue;
+    }
 }
 
 /*
@@ -73,24 +73,24 @@ bsdcontrol_feature_set(VALUE self, VALUE path, VALUE rbstate)
 VALUE
 bsdcontrol_feature_sysdef(VALUE self, VALUE path)
 {
-  int fd;
-  VALUE rbcontext;
-  hbsdctrl_feature_t *feature;
-  hbsdctrl_ctx_t *ctx;
-  rbcontext = rb_funcall(self, rb_intern("context"), 0);
-  fd        = bsdcontrol_open(path);
-  ctx       = bsdcontrol_unwrap(rbcontext);
-  feature   = bsdcontrol_find_feature(ctx, self);
-  errno     = 0;
-  if (feature->hf_unapply(ctx, feature, &fd, NULL) == RES_FAIL)
-  {
-    close(fd);
-    errno == 0 ? rb_raise(rb_eSystemCallError, "hf_unapply")
-               : rb_syserr_fail(errno, "hf_unapply");
-  }
-  else
-  {
-    close(fd);
-    return Qtrue;
-  }
+    int fd;
+    VALUE rbcontext;
+    hbsdctrl_feature_t *feature;
+    hbsdctrl_ctx_t *ctx;
+    rbcontext = rb_funcall(self, rb_intern("context"), 0);
+    fd        = bsdcontrol_open(path);
+    ctx       = bsdcontrol_unwrap(rbcontext);
+    feature   = bsdcontrol_find_feature(ctx, self);
+    errno     = 0;
+    if (feature->hf_unapply(ctx, feature, &fd, NULL) == RES_FAIL)
+    {
+        close(fd);
+        errno == 0 ? rb_raise(rb_eSystemCallError, "hf_unapply")
+                   : rb_syserr_fail(errno, "hf_unapply");
+    }
+    else
+    {
+        close(fd);
+        return Qtrue;
+    }
 }
diff --git a/ext/bsdcontrol.rb/glue.c b/ext/bsdcontrol.rb/glue.c
index b5ebc4c..df84e1f 100644
--- a/ext/bsdcontrol.rb/glue.c
+++ b/ext/bsdcontrol.rb/glue.c
@@ -7,29 +7,29 @@
 int
 bsdcontrol_open(VALUE path)
 {
-  int fd;
-  Check_Type(path, T_STRING);
-  fd = open(RSTRING_PTR(path), O_PATH);
-  if (fd == -1)
-  {
-    rb_syserr_fail(errno, "open");
-  }
-  return fd;
+    int fd;
+    Check_Type(path, T_STRING);
+    fd = open(RSTRING_PTR(path), O_PATH);
+    if (fd == -1)
+    {
+        rb_syserr_fail(errno, "open");
+    }
+    return fd;
 }
 
 hbsdctrl_ctx_t *
 bsdcontrol_unwrap(VALUE rbcontext)
 {
-  struct bsdcontrol_ctx_t *rbctx;
-  Data_Get_Struct(rbcontext, struct bsdcontrol_ctx_t, rbctx);
-  return rbctx->ctx;
+    struct bsdcontrol_ctx_t *rbctx;
+    Data_Get_Struct(rbcontext, struct bsdcontrol_ctx_t, rbctx);
+    return rbctx->ctx;
 }
 
 hbsdctrl_feature_t *
 bsdcontrol_find_feature(hbsdctrl_ctx_t *ctx, VALUE rbfeature)
 {
-  VALUE name;
-  name = rb_funcall(rbfeature, rb_intern("name"), 0);
-  Check_Type(name, T_STRING);
-  return hbsdctrl_ctx_find_feature_by_name(ctx, RSTRING_PTR(name));
+    VALUE name;
+    name = rb_funcall(rbfeature, rb_intern("name"), 0);
+    Check_Type(name, T_STRING);
+    return hbsdctrl_ctx_find_feature_by_name(ctx, RSTRING_PTR(name));
 }