diff options
Diffstat (limited to 'src/basic/user-util.h')
| -rw-r--r-- | src/basic/user-util.h | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/src/basic/user-util.h b/src/basic/user-util.h index dfea561bde..79adf91ee9 100644 --- a/src/basic/user-util.h +++ b/src/basic/user-util.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ #pragma once /*** @@ -59,17 +60,25 @@ 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)) +#define UID_NOBODY ((uid_t) 65534U) +#define GID_NOBODY ((gid_t) 65534U) 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)) |