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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <sys/stat.h>
#include <sys/types.h>
#include "daemon-util.h"
#include "userdbd-manager.h"
#include "log.h"
#include "main-func.h"
#include "signal-util.h"
/* This service offers two Varlink services, both implementing io.systemd.UserDatabase:
*
* → io.systemd.NameServiceSwitch: this is a compatibility interface for glibc NSS: it responds to
* name lookups by checking the classic NSS interfaces and responding that.
*
* → io.systemd.Multiplexer: this multiplexes lookup requests to all Varlink services that have a
* socket in /run/systemd/userdb/. It's supposed to simplify clients that don't want to implement
* the full iterative logic on their own.
*
* → io.systemd.DropIn: this makes JSON user/group records dropped into /run/userdb/ available as
* regular users.
*/
static int run(int argc, char *argv[]) {
_cleanup_(manager_freep) Manager *m = NULL;
_unused_ _cleanup_(notify_on_cleanup) const char *notify_stop = NULL;
int r;
log_setup();
umask(0022);
if (argc != 1)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
if (setenv("SYSTEMD_BYPASS_USERDB", "io.systemd.NameServiceSwitch:io.systemd.Multiplexer:io.systemd.DropIn", 1) < 0)
return log_error_errno(errno, "Failed to set $SYSTEMD_BYPASS_USERDB: %m");
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, SIGUSR2, -1) >= 0);
r = manager_new(&m);
if (r < 0)
return log_error_errno(r, "Could not create manager: %m");
r = manager_startup(m);
if (r < 0)
return log_error_errno(r, "Failed to start up daemon: %m");
notify_stop = notify_start(NOTIFY_READY, NOTIFY_STOPPING);
r = sd_event_loop(m->event);
if (r < 0)
return log_error_errno(r, "Event loop failed: %m");
return 0;
}
DEFINE_MAIN_FUNCTION(run);
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