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Define uid range for greeter

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In multi-seat scenarios, a display manager might need to start multiple
greeter sessions. But systemd allows at most one graphical session per
user. So, display managers now have a range of UIDs to dynamically
allocate users for their greeter sessions.
This commit is contained in:
Adrian Vovk
2025-06-02 11:19:12 +02:00
committed by Zbigniew Jędrzejewski-Szmek
parent 2dcf0ee0ef
commit 554130faf3
11 changed files with 46 additions and 10 deletions
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src/basic/uid-classification.c
+1 -1
View File
@@ -129,5 +129,5 @@ bool uid_for_system_journal(uid_t uid) {
/* Returns true if the specified UID shall get its data stored in the system journal. */
return uid_is_system(uid) || uid_is_dynamic(uid) || uid == UID_NOBODY || uid_is_container(uid) || uid_is_foreign(uid);
return uid_is_system(uid) || uid_is_dynamic(uid) || uid_is_greeter(uid) || uid == UID_NOBODY || uid_is_container(uid) || uid_is_foreign(uid);
}
src/basic/uid-classification.h
+4
View File
@@ -18,6 +18,10 @@ assert_cc((FOREIGN_UID_BASE & 0xFFFFU) == 0);
bool uid_is_system(uid_t uid);
bool gid_is_system(gid_t gid);
static inline bool uid_is_greeter(uid_t uid) {
return GREETER_UID_MIN <= uid && uid <= GREETER_UID_MAX;
}
static inline bool uid_is_dynamic(uid_t uid) {
return DYNAMIC_UID_MIN <= uid && uid <= DYNAMIC_UID_MAX;
}