util-lib: split stat()/statfs()/stavfs() related calls into stat-util.[ch]

src/basic/stat-util.h

@@ -0,0 +1,63 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010-2012 Lennart Poettering
+
+  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 <stdbool.h>
+#include <sys/stat.h>
+#include <sys/vfs.h>
+
+#include "macro.h"
+
+int is_symlink(const char *path);
+int is_dir(const char *path, bool follow);
+int is_device_node(const char *path);
+
+int dir_is_empty(const char *path);
+
+static inline int dir_is_populated(const char *path) {
+        int r;
+        r = dir_is_empty(path);
+        if (r < 0)
+                return r;
+        return !r;
+}
+
+bool null_or_empty(struct stat *st) _pure_;
+int null_or_empty_path(const char *fn);
+int null_or_empty_fd(int fd);
+
+int path_is_read_only_fs(const char *path);
+int path_is_os_tree(const char *path);
+
+int files_same(const char *filea, const char *fileb);
+
+/* The .f_type field of struct statfs is really weird defined on
+ * different archs. Let's use our own type we know is sufficiently
+ * larger to store the possible values. */
+typedef long statfs_f_type_t;
+
+bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) _pure_;
+int fd_check_fstype(int fd, statfs_f_type_t magic_value);
+int path_check_fstype(const char *path, statfs_f_type_t magic_value);
+
+bool is_temporary_fs(const struct statfs *s) _pure_;
+int fd_is_temporary_fs(int fd);