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machined: set user.userdb.* xattrs on machined socket

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This commit is contained in:
Lennart Poettering
2026-07-12 23:09:01 +02:00
parent e3876f7559
commit 33b2db3c8f
1 changed files with 9 additions and 0 deletions
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src/machine/machined-varlink.c
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@@ -31,6 +31,7 @@
#include "varlink-io.systemd.Resolve.Hook.h"
#include "varlink-io.systemd.service.h"
#include "varlink-util.h"
#include "xattr-util.h"
typedef struct LookupParameters {
const char *user_name;
@@ -774,6 +775,14 @@ static int manager_varlink_init_userdb(Manager *m) {
if (r < 0)
return log_error_errno(r, "Failed to bind to varlink socket %s: %m", VARLINK_PATH_MACHINED_USERDB);
/* Reduce the noise routed to us: advertise that only look-ups for the higher UID range */
char text[DECIMAL_STR_MAX(uid_t) + 1 + DECIMAL_STR_MAX(gid_t) + 1];
xsprintf(text, UID_FMT "-" UID_FMT, (uid_t) 0x10000U, (uid_t) UINT32_C(0xfffffffe));
FOREACH_STRING(xattr, "user.userdb.uid", "user.userdb.gid")
(void) xsetxattr(AT_FDCWD, VARLINK_PATH_MACHINED_USERDB, /* at_flags= */ 0, xattr, text);
(void) xsetxattr(AT_FDCWD, VARLINK_PATH_MACHINED_USERDB, /* at_flags= */ 0, "user.userdb.username", "vu-*");
(void) xsetxattr(AT_FDCWD, VARLINK_PATH_MACHINED_USERDB, /* at_flags= */ 0, "user.userdb.groupname", "vg-*");
r = sd_varlink_server_attach_event(s, m->event, SD_EVENT_PRIORITY_NORMAL);
if (r < 0)
return log_error_errno(r, "Failed to attach varlink connection to event loop: %m");