shared: add exec-directory-util.ch

src/shared/exec-directory-util.c

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "exec-directory-util.h"
+#include "string-table.h"
+
+/* This table maps ExecDirectoryType to the setting it is configured with in the unit */
+static const char* const exec_directory_type_table[_EXEC_DIRECTORY_TYPE_MAX] = {
+        [EXEC_DIRECTORY_RUNTIME]       = "RuntimeDirectory",
+        [EXEC_DIRECTORY_STATE]         = "StateDirectory",
+        [EXEC_DIRECTORY_CACHE]         = "CacheDirectory",
+        [EXEC_DIRECTORY_LOGS]          = "LogsDirectory",
+        [EXEC_DIRECTORY_CONFIGURATION] = "ConfigurationDirectory",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(exec_directory_type, ExecDirectoryType);

src/shared/exec-directory-util.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <errno.h>
+
+#include "macro-fundamental.h"
+
+typedef enum ExecDirectoryType {
+        EXEC_DIRECTORY_RUNTIME,
+        EXEC_DIRECTORY_STATE,
+        EXEC_DIRECTORY_CACHE,
+        EXEC_DIRECTORY_LOGS,
+        EXEC_DIRECTORY_CONFIGURATION,
+        _EXEC_DIRECTORY_TYPE_MAX,
+        _EXEC_DIRECTORY_TYPE_INVALID = -EINVAL,
+} ExecDirectoryType;
+
+const char* exec_directory_type_to_string(ExecDirectoryType i) _const_;
+ExecDirectoryType exec_directory_type_from_string(const char *s) _pure_;

src/shared/meson.build

@@ -69,6 +69,7 @@ shared_sources = files(
         'elf-util.c',
         'enable-mempool.c',
         'ethtool-util.c',
+        'exec-directory-util.c',
         'exec-util.c',
         'exit-status.c',
         'extension-util.c',