/*-*- 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* 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); int take_etc_passwd_lock(const char *root); #define UID_INVALID ((uid_t) -1) #define GID_INVALID ((gid_t) -1) /* The following macros add 1 when converting things, since UID 0 is a * valid UID, while the pointer NULL is special */ #define PTR_TO_UID(p) ((uid_t) (((uintptr_t) (p))-1)) #define UID_TO_PTR(u) ((void*) (((uintptr_t) (u))+1)) #define PTR_TO_GID(p) ((gid_t) (((uintptr_t) (p))-1)) #define GID_TO_PTR(u) ((void*) (((uintptr_t) (u))+1))