Move mkdir_p into a utility header

Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/984>

meson.build

@@ -258,6 +258,7 @@ util_headers = [
 		'util-bits.h',
 		'util-input-event.h',
 		'util-list.h',
+		'util-files.h',
 		'util-macros.h',
 		'util-matrix.h',
 		'util-prop-parsers.h',

src/util-files.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright © 2024 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "config.h"
+
+#include <errno.h>
+#include <libgen.h>
+#include <sys/stat.h>
+
+#include "util-strings.h"
+
+static inline int
+mkdir_p(const char *dir)
+{
+	char *path, *parent;
+	int rc;
+
+	if (streq(dir, "/"))
+		return 0;
+
+	path = safe_strdup(dir);
+	parent = dirname(path);
+
+	mkdir_p(parent);
+	rc = mkdir(dir, 0755);
+
+	free(path);
+
+	return (rc == -1 && errno != EEXIST) ? -errno : 0;
+}

test/litest.c

@@ -27,7 +27,6 @@
 #include <check.h>
 #include <dirent.h>
 #include <errno.h>
-#include <libgen.h>
 #include <fcntl.h>
 #include <fnmatch.h>
 #include <getopt.h>
@@ -57,6 +56,7 @@
 
 #include <valgrind/valgrind.h>
 
+#include "util-files.h"
 #include "litest.h"
 #include "litest-int.h"
 #include "libinput-util.h"
@@ -1558,34 +1558,10 @@ litest_setup_quirks(struct list *created_files_list,
 	setenv("LIBINPUT_QUIRKS_DIR", dirname, 1);
 }
 
-static inline void
-mkdir_p(const char *dir)
-{
-	char *path, *parent;
-	int rc;
-
-	if (streq(dir, "/"))
-		return;
-
-	path = safe_strdup(dir);
-	parent = dirname(path);
-
-	mkdir_p(parent);
-	rc = mkdir(dir, 0755);
-
-	if (rc == -1 && errno != EEXIST) {
-		litest_abort_msg("Failed to create directory %s (%s)\n",
-				 dir,
-				 strerror(errno));
-	}
-
-	free(path);
-}
-
 static inline void
 litest_init_udev_rules(struct list *created_files)
 {
-	mkdir_p(UDEV_RULES_D);
+	litest_assert_neg_errno_success(mkdir_p(UDEV_RULES_D));
 
 	litest_install_model_quirks(created_files);
 	litest_init_all_device_udev_rules(created_files);