Merge pull request #11827 from keszybz/pkgconfig-variables

[thirdparty/systemd.git] / src / basic / stat-util.h

diff --git a/src/basic/stat-util.h b/src/basic/stat-util.h
index da33e68db251338d9ace9b1667573460157c3a6c..74fb7251b3872c4f08f38383bab7ab4c0f8979cd 100644 (file)
--- a/src/basic/stat-util.h
+++ b/src/basic/stat-util.h
@@ -1,25 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #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 <stddef.h>
 #include <sys/stat.h>
@@ -31,9 +12,13 @@
 
 int is_symlink(const char *path);
 int is_dir(const char *path, bool follow);
+int is_dir_fd(int fd);
 int is_device_node(const char *path);
 
-int dir_is_empty(const char *path);
+int dir_is_empty_at(int dir_fd, const char *path);
+static inline int dir_is_empty(const char *path) {
+        return dir_is_empty_at(AT_FDCWD, path);
+}
 
 static inline int dir_is_populated(const char *path) {
         int r;
@@ -48,7 +33,6 @@ 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, int flags);
 
@@ -75,3 +59,32 @@ int path_is_temporary_fs(const char *path);
  * signed/unsigned comparison, because the magic can be 32 bit unsigned.
  */
 #define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
+
+int stat_verify_regular(const struct stat *st);
+int fd_verify_regular(int fd);
+
+int stat_verify_directory(const struct stat *st);
+int fd_verify_directory(int fd);
+
+/* glibc and the Linux kernel have different ideas about the major/minor size. These calls will check whether the
+ * specified major is valid by the Linux kernel's standards, not by glibc's. Linux has 20bits of minor, and 12 bits of
+ * major space. See MINORBITS in linux/kdev_t.h in the kernel sources. (If you wonder why we define _y here, instead of
+ * comparing directly >= 0: it's to trick out -Wtype-limits, which would otherwise complain if the type is unsigned, as
+ * such a test would be pointless in such a case.) */
+
+#define DEVICE_MAJOR_VALID(x)                                           \
+        ({                                                              \
+                typeof(x) _x = (x), _y = 0;                             \
+                _x >= _y && _x < (UINT32_C(1) << 12);                   \
+                                                                        \
+        })
+
+#define DEVICE_MINOR_VALID(x)                                           \
+        ({                                                              \
+                typeof(x) _x = (x), _y = 0;                             \
+                _x >= _y && _x < (UINT32_C(1) << 20);                   \
+        })
+
+int device_path_make_major_minor(mode_t mode, dev_t devno, char **ret);
+int device_path_make_canonical(mode_t mode, dev_t devno, char **ret);
+int device_path_parse_major_minor(const char *path, mode_t *ret_mode, dev_t *ret_devno);