1 files changed, 90 insertions, 0 deletions
diff --git a/src/libsystemd-basic/include/systemd-basic/user-util.h b/src/libsystemd-basic/include/systemd-basic/user-util.h
new file mode 100644
index 0000000000..dfea561bde
--- /dev/null
+++ b/src/libsystemd-basic/include/systemd-basic/user-util.h
@@ -0,0 +1,90 @@
+#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 <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <unistd.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_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);
+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)
+
+/* Let's pick a UIDs within the 16bit range, so that we are compatible with containers using 16bit
+ * user namespacing. At least on Fedora normal users are allocated until UID 60000, hence do not
+ * allocate from below this. Also stay away from the upper end of the range as that is often used
+ * for overflow/nobody users. */
+#define DYNAMIC_UID_MIN ((uid_t) UINT32_C(0x0000EF00))
+#define DYNAMIC_UID_MAX ((uid_t) UINT32_C(0x0000FFEF))
+
+static inline bool uid_is_dynamic(uid_t uid) {
+        return DYNAMIC_UID_MIN <= uid && uid <= DYNAMIC_UID_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);
+
+int maybe_setgroups(size_t size, const gid_t *list);