Config*: move to config/

src/config/ConfigPath.cxx

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2003-2014 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"
+#include "ConfigPath.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "fs/Traits.hxx"
+#include "fs/Domain.hxx"
+#include "fs/StandardDirectory.hxx"
+#include "util/Error.hxx"
+#include "ConfigGlobal.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+#ifndef WIN32
+#include <pwd.h>
+
+/**
+ * Determine a given user's home directory.
+ */
+static AllocatedPath
+GetHome(const char *user, Error &error)
+{
+	AllocatedPath result = GetHomeDir(user);
+	if (result.IsNull()) {
+		error.Format(path_domain,
+			     "no such user: %s", user);
+		return AllocatedPath::Null();
+	}
+
+	return result;
+}
+
+/**
+ * Determine the current user's home directory.
+ */
+static AllocatedPath
+GetHome(Error &error)
+{
+	AllocatedPath result = GetHomeDir();
+	if (result.IsNull()) {
+		error.Set(path_domain,
+			  "problems getting home for current user");
+		return AllocatedPath::Null();
+	}
+
+	return result;
+}
+
+/**
+ * Determine the configured user's home directory.
+ */
+static AllocatedPath
+GetConfiguredHome(Error &error)
+{
+	const char *user = config_get_string(CONF_USER, nullptr);
+	return user != nullptr
+		? GetHome(user, error)
+		: GetHome(error);
+}
+
+#endif
+
+AllocatedPath
+ParsePath(const char *path, Error &error)
+{
+	assert(path != nullptr);
+
+#ifndef WIN32
+	if (path[0] == '~') {
+		++path;
+
+		if (*path == '\0')
+			return GetConfiguredHome(error);
+
+		AllocatedPath home = AllocatedPath::Null();
+
+		if (*path == '/') {
+			home = GetConfiguredHome(error);
+
+			++path;
+		} else {
+			const char *slash = strchr(path, '/');
+			const char *end = slash == nullptr
+					? path + strlen(path)
+					: slash;
+			const std::string user(path, end);
+			home = GetHome(user.c_str(), error);
+
+			if (slash == nullptr)
+				return home;
+
+			path = slash + 1;
+		}
+
+		if (home.IsNull())
+			return AllocatedPath::Null();
+
+		AllocatedPath path2 = AllocatedPath::FromUTF8(path, error);
+		if (path2.IsNull())
+			return AllocatedPath::Null();
+
+		return AllocatedPath::Build(home, path2);
+	} else if (!PathTraitsUTF8::IsAbsolute(path)) {
+		error.Format(path_domain,
+			     "not an absolute path: %s", path);
+		return AllocatedPath::Null();
+	} else {
+#endif
+		return AllocatedPath::FromUTF8(path, error);
+#ifndef WIN32
+	}
+#endif
+}