-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
#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 <grp.h>
+#include <gshadow.h>
+#include <pwd.h>
+#include <shadow.h>
#include <stdbool.h>
+#include <stdint.h>
#include <sys/types.h>
+#include <unistd.h>
bool uid_is_valid(uid_t uid);
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_user_creds_clean(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);
#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 UID_NOBODY ((uid_t) 65534U)
+#define GID_NOBODY ((gid_t) 65534U)
+
+#define ETC_PASSWD_LOCK_PATH "/etc/.pwd.lock"
+
+static inline bool uid_is_dynamic(uid_t uid) {
+ return DYNAMIC_UID_MIN <= uid && uid <= DYNAMIC_UID_MAX;
+}
+
+static inline bool gid_is_dynamic(gid_t gid) {
+ return uid_is_dynamic((uid_t) gid);
+}
+
+static inline bool uid_is_system(uid_t uid) {
+ return uid <= SYSTEM_UID_MAX;
+}
+
+static inline bool gid_is_system(gid_t gid) {
+ return gid <= SYSTEM_GID_MAX;
+}
+
+/* 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))
+
+static inline bool userns_supported(void) {
+ return access("/proc/self/uid_map", F_OK) >= 0;
+}
+
+bool valid_user_group_name(const char *u);
+bool valid_user_group_name_or_id(const char *u);
+bool valid_gecos(const char *d);
+bool valid_home(const char *p);
+
+static inline bool valid_shell(const char *p) {
+ /* We have the same requirements, so just piggy-back on the home check.
+ *
+ * Let's ignore /etc/shells because this is only applicable to real and
+ * not system users. It is also incompatible with the idea of empty /etc.
+ */
+ return valid_home(p);
+}
+
+int maybe_setgroups(size_t size, const gid_t *list);
+
+bool synthesize_nobody(void);
+
+int fgetpwent_sane(FILE *stream, struct passwd **pw);
+int fgetspent_sane(FILE *stream, struct spwd **sp);
+int fgetgrent_sane(FILE *stream, struct group **gr);
+int putpwent_sane(const struct passwd *pw, FILE *stream);
+int putspent_sane(const struct spwd *sp, FILE *stream);
+int putgrent_sane(const struct group *gr, FILE *stream);
+#if ENABLE_GSHADOW
+int fgetsgent_sane(FILE *stream, struct sgrp **sg);
+int putsgent_sane(const struct sgrp *sg, FILE *stream);
+#endif