3a664727fa
We use it all over the place, let's add a #define for it. Makes things easier greppable, and more explanatory I think.
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <unistd.h>
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bool uid_is_valid(uid_t uid);
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static inline bool gid_is_valid(gid_t gid) {
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return uid_is_valid((uid_t) gid);
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}
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int parse_uid(const char *s, uid_t* ret_uid);
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static inline int parse_gid(const char *s, gid_t *ret_gid) {
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return parse_uid(s, (uid_t*) ret_gid);
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}
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char* getlogname_malloc(void);
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char* getusername_malloc(void);
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int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
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int get_user_creds_clean(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
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int get_group_creds(const char **groupname, gid_t *gid);
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char* uid_to_name(uid_t uid);
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char* gid_to_name(gid_t gid);
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int in_gid(gid_t gid);
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int in_group(const char *name);
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int get_home_dir(char **ret);
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int get_shell(char **_ret);
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int reset_uid_gid(void);
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int take_etc_passwd_lock(const char *root);
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#define UID_INVALID ((uid_t) -1)
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#define GID_INVALID ((gid_t) -1)
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#define UID_NOBODY ((uid_t) 65534U)
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#define GID_NOBODY ((gid_t) 65534U)
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static inline bool uid_is_dynamic(uid_t uid) {
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return DYNAMIC_UID_MIN <= uid && uid <= DYNAMIC_UID_MAX;
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}
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static inline bool gid_is_dynamic(gid_t gid) {
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return uid_is_dynamic((uid_t) gid);
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}
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static inline bool uid_is_system(uid_t uid) {
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return uid <= SYSTEM_UID_MAX;
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}
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static inline bool gid_is_system(gid_t gid) {
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return gid <= SYSTEM_GID_MAX;
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}
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/* The following macros add 1 when converting things, since UID 0 is a valid UID, while the pointer
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* NULL is special */
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#define PTR_TO_UID(p) ((uid_t) (((uintptr_t) (p))-1))
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#define UID_TO_PTR(u) ((void*) (((uintptr_t) (u))+1))
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#define PTR_TO_GID(p) ((gid_t) (((uintptr_t) (p))-1))
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#define GID_TO_PTR(u) ((void*) (((uintptr_t) (u))+1))
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static inline bool userns_supported(void) {
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return access("/proc/self/uid_map", F_OK) >= 0;
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}
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bool valid_user_group_name(const char *u);
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bool valid_user_group_name_or_id(const char *u);
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bool valid_gecos(const char *d);
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bool valid_home(const char *p);
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int maybe_setgroups(size_t size, const gid_t *list);
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