shared: split mkdir_*() and mkdir_*_label() from each other

Avoid pulling-in selinux for tools which just create directories
but not need to fix the selinux label.

Makefile.am

@@ -752,6 +752,7 @@ libsystemd_label_la_SOURCES = \
 	src/shared/selinux-util.c \
 	src/shared/selinux-util.h \
 	src/shared/mkdir.c \
+	src/shared/mkdir-label.c \
 	src/shared/mkdir.h \
 	src/shared/ask-password-api.c \
 	src/shared/ask-password-api.h \

src/shared/cgroup-label.c

@@ -47,7 +47,7 @@ int cg_create(const char *controller, const char *path) {
         if (r < 0)
                 return r;
 
-        r = mkdir_parents_prefix("/sys/fs/cgroup", fs, 0755);
+        r = mkdir_parents_prefix_label("/sys/fs/cgroup", fs, 0755);
         if (r < 0)
                 return r;
 

src/shared/label.c

@@ -257,14 +257,14 @@ void label_free(const char *label) {
 #endif
 }
 
-int label_mkdir(const char *path, mode_t mode, bool apply) {
+int label_mkdir(const char *path, mode_t mode) {
 
         /* Creates a directory and labels it according to the SELinux policy */
 #ifdef HAVE_SELINUX
         int r;
         security_context_t fcon = NULL;
 
-        if (!apply || !use_selinux() || !label_hnd)
+        if (!use_selinux() || !label_hnd)
                 goto skipped;
 
         if (path_is_absolute(path))

src/shared/label.h

@@ -40,7 +40,7 @@ void label_free(const char *label);
 
 int label_get_create_label_from_exe(const char *exe, char **label);
 
-int label_mkdir(const char *path, mode_t mode, bool apply);
+int label_mkdir(const char *path, mode_t mode);
 
 void label_retest_selinux(void);
 

src/shared/mkdir-label.c

@@ -0,0 +1,53 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+  Copyright 2013 Kay Sievers
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "label.h"
+#include "util.h"
+#include "path-util.h"
+#include "mkdir.h"
+
+int mkdir_label(const char *path, mode_t mode) {
+        return label_mkdir(path, mode);
+}
+
+int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+        return mkdir_safe_internal(path, mode, uid, gid, label_mkdir);
+}
+
+int mkdir_parents_label(const char *path, mode_t mode) {
+        return mkdir_parents_internal(NULL, path, mode, label_mkdir);
+}
+
+int mkdir_parents_prefix_label(const char *prefix, const char *path, mode_t mode) {
+        return mkdir_parents_internal(prefix, path, mode, label_mkdir);
+}
+
+int mkdir_p_label(const char *path, mode_t mode) {
+        return mkdir_p_internal(NULL, path, mode, label_mkdir);
+}

src/shared/mkdir.c

@@ -31,14 +31,10 @@
 #include "path-util.h"
 #include "mkdir.h"
 
-int mkdir_label(const char *path, mode_t mode) {
-        return label_mkdir(path, mode, true);
-}
-
-static int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, bool apply) {
+int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkdir_func_t _mkdir) {
         struct stat st;
 
-        if (label_mkdir(path, mode, apply) >= 0)
+        if (_mkdir(path, mode) >= 0)
                 if (chmod_and_chown(path, mode, uid, gid) < 0)
                         return -errno;
 
@@ -60,10 +56,6 @@ int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) {
         return mkdir_safe_internal(path, mode, uid, gid, false);
 }
 
-int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid) {
-        return mkdir_safe_internal(path, mode, uid, gid, true);
-}
-
 static int is_dir(const char* path) {
         struct stat st;
 
@@ -73,7 +65,7 @@ static int is_dir(const char* path) {
         return S_ISDIR(st.st_mode);
 }
 
-static int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, bool apply) {
+int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
         const char *p, *e;
         int r;
 
@@ -116,34 +108,26 @@ static int mkdir_parents_internal(const char *prefix, const char *path, mode_t m
                 if (prefix && path_startswith(prefix, t))
                         continue;
 
-                r = label_mkdir(t, mode, apply);
+                r = _mkdir(t, mode);
                 if (r < 0 && errno != EEXIST)
                         return -errno;
         }
 }
 
 int mkdir_parents(const char *path, mode_t mode) {
-        return mkdir_parents_internal(NULL, path, mode, false);
+        return mkdir_parents_internal(NULL, path, mode, mkdir);
 }
 
-int mkdir_parents_label(const char *path, mode_t mode) {
-        return mkdir_parents_internal(NULL, path, mode, true);
-}
-
-int mkdir_parents_prefix(const char *prefix, const char *path, mode_t mode) {
-        return mkdir_parents_internal(prefix, path, mode, true);
-}
-
-static int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, bool apply) {
+int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
         int r;
 
         /* Like mkdir -p */
 
-        r = mkdir_parents_internal(prefix, path, mode, apply);
+        r = mkdir_parents_internal(prefix, path, mode, _mkdir);
         if (r < 0)
                 return r;
 
-        r = label_mkdir(path, mode, apply);
+        r = _mkdir(path, mode);
         if (r < 0 && (errno != EEXIST || is_dir(path) <= 0))
                 return -errno;
 
@@ -151,13 +135,9 @@ static int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, b
 }
 
 int mkdir_p(const char *path, mode_t mode) {
-        return mkdir_p_internal(NULL, path, mode, false);
-}
-
-int mkdir_p_label(const char *path, mode_t mode) {
-        return mkdir_p_internal(NULL, path, mode, true);
+        return mkdir_p_internal(NULL, path, mode, mkdir);
 }
 
 int mkdir_p_prefix(const char *prefix, const char *path, mode_t mode) {
-        return mkdir_p_internal(prefix, path, mode, false);
+        return mkdir_p_internal(prefix, path, mode, mkdir);
 }

src/shared/mkdir.h

@@ -7,6 +7,7 @@
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
+  Copyright 2013 Kay Sievers
 
   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
@@ -24,17 +25,21 @@
 
 #include <sys/types.h>
 
-int mkdir_label(const char *path, mode_t mode);
-
 int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid);
-int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid);
-
 int mkdir_parents(const char *path, mode_t mode);
-int mkdir_parents_label(const char *path, mode_t mode);
-int mkdir_parents_prefix(const char *prefix, const char *path, mode_t mode);
-
 int mkdir_p(const char *path, mode_t mode);
-int mkdir_p_label(const char *path, mode_t mode);
 int mkdir_p_prefix(const char *prefix, const char *path, mode_t mode);
 
+/* selinux versions */
+int mkdir_label(const char *path, mode_t mode);
+int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid);
+int mkdir_parents_label(const char *path, mode_t mode);
+int mkdir_p_label(const char *path, mode_t mode);
+int mkdir_parents_prefix_label(const char *prefix, const char *path, mode_t mode);
+
+/* internally used */
+typedef int (*mkdir_func_t)(const char *pathname, mode_t mode);
+int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkdir_func_t _mkdir);
+int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir);
+int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir);
 #endif