update_walk: move code to update_io.c

1 files changed, 116 insertions, 0 deletions

diff --git a/src/update_io.c b/src/update_io.c
new file mode 100644
index 000000000..887ebe2e5
--- /dev/null
+++ b/src/update_io.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2003-2012 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h" /* must be first for large file support */
+#include "update_io.h"
+#include "mapper.h"
+#include "directory.h"
+
+#include <glib.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+int
+stat_directory(const struct directory *directory, struct stat *st)
+{
+	char *path_fs = map_directory_fs(directory);
+	if (path_fs == NULL)
+		return -1;
+
+	int ret = stat(path_fs, st);
+	if (ret < 0)
+		g_warning("Failed to stat %s: %s", path_fs, g_strerror(errno));
+
+	g_free(path_fs);
+	return ret;
+}
+
+int
+stat_directory_child(const struct directory *parent, const char *name,
+		     struct stat *st)
+{
+	char *path_fs = map_directory_child_fs(parent, name);
+	if (path_fs == NULL)
+		return -1;
+
+	int ret = stat(path_fs, st);
+	if (ret < 0)
+		g_warning("Failed to stat %s: %s", path_fs, g_strerror(errno));
+
+	g_free(path_fs);
+	return ret;
+}
+
+bool
+directory_exists(const struct directory *directory)
+{
+	char *path_fs = map_directory_fs(directory);
+	if (path_fs == NULL)
+		/* invalid path: cannot exist */
+		return false;
+
+	GFileTest test = directory->device == DEVICE_INARCHIVE ||
+		directory->device == DEVICE_CONTAINER
+		? G_FILE_TEST_IS_REGULAR
+		: G_FILE_TEST_IS_DIR;
+
+	bool exists = g_file_test(path_fs, test);
+	g_free(path_fs);
+
+	return exists;
+}
+
+bool
+directory_child_is_regular(const struct directory *directory,
+			   const char *name_utf8)
+{
+	char *path_fs = map_directory_child_fs(directory, name_utf8);
+	if (path_fs == NULL)
+		return false;
+
+	struct stat st;
+	bool is_regular = stat(path_fs, &st) == 0 && S_ISREG(st.st_mode);
+	g_free(path_fs);
+
+	return is_regular;
+}
+
+bool
+directory_child_access(const struct directory *directory,
+		       const char *name, int mode)
+{
+#ifdef WIN32
+	/* access() is useless on WIN32 */
+	(void)directory;
+	(void)name;
+	(void)mode;
+	return true;
+#else
+	char *path = map_directory_child_fs(directory, name);
+	if (path == NULL)
+		/* something went wrong, but that isn't a permission
+		   problem */
+		return true;
+
+	bool success = access(path, mode) == 0 || errno != EACCES;
+	g_free(path);
+	return success;
+#endif
+}