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diff --git a/src/basic/user-util.h b/src/basic/user-util.h
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 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 <sys/types.h>
+#include <stdbool.h>
+
+bool uid_is_valid(uid_t uid);
+
+static inline bool gid_is_valid(gid_t gid) {
+ return uid_is_valid((uid_t) gid);
+}
+
+int parse_uid(const char *s, uid_t* ret_uid);
+
+static inline int parse_gid(const char *s, gid_t *ret_gid) {
+ return parse_uid(s, (uid_t*) ret_gid);
+}
+
+char* lookup_uid(uid_t uid);
+char* getlogname_malloc(void);
+char* getusername_malloc(void);
+
+int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
+int get_group_creds(const char **groupname, gid_t *gid);
+
+char* uid_to_name(uid_t uid);
+char* gid_to_name(gid_t gid);
+
+int in_gid(gid_t gid);
+int in_group(const char *name);
+
+int get_home_dir(char **ret);
+int get_shell(char **_ret);
+
+int reset_uid_gid(void);