const char *username = NULL;
struct passwd *pw = NULL;
+ uid_t uid;
int r;
- bool have_loginuid = false;
- char *s;
assert(handle);
assert(ret_username);
assert(ret_pw);
- if (have_effective_cap(CAP_AUDIT_CONTROL) > 0) {
- /* Only use audit login uid if we are executed with
- * sufficient capabilities so that pam_loginuid could
- * do its job. If we are lacking the CAP_AUDIT_CONTROL
- * capabality we most likely are being run in a
- * container and /proc/self/loginuid is useless since
- * it probably contains a uid of the host system. */
-
- if (read_one_line_file("/proc/self/loginuid", &s) >= 0) {
- uid_t uid;
-
- r = parse_uid(s, &uid);
- free(s);
-
- if (r >= 0 && uid != (uint32_t) -1) {
- have_loginuid = true;
- pw = pam_modutil_getpwuid(handle, uid);
- }
- }
- }
-
- if (!have_loginuid) {
- if ((r = pam_get_user(handle, &username, NULL)) != PAM_SUCCESS) {
+ r = audit_loginuid_from_pid(0, &uid);
+ if (r >= 0)
+ pw = pam_modutil_getpwuid(handle, uid);
+ else {
+ r = pam_get_user(handle, &username, NULL);
+ if (r != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to get user name.");
return r;
}
- if (!username || !*username) {
+ if (isempty(username)) {
pam_syslog(handle, LOG_ERR, "User name not valid.");
return PAM_AUTH_ERR;
}
if (isempty(display))
display = tty;
tty = "";
+ } else if (streq(tty, "cron")) {
+ /* cron has been setting PAM_TTY to "cron" for a very long time
+ * and it cannot stop doing that for compatibility reasons. */
+ tty = "";
}
if (!isempty(cvtnr))
get_seat_from_display(display, &seat, &vtnr);
type = !isempty(display) ? "x11" :
- !isempty(tty) ? "tty" : "other";
+ !isempty(tty) ? "tty" : "unspecified";
remote = !isempty(remote_host) && !streq(remote_host, "localhost") && !streq(remote_host, "localhost.localdomain");
goto finish;
}
+ if (debug)
+ pam_syslog(handle, LOG_DEBUG, "Asking logind to create session: "
+ "uid=%u pid=%u service=%s type=%s seat=%s vtnr=%u tty=%s display=%s remote=%s remote_user=%s remote_host=%s",
+ uid, pid, service, type, seat, vtnr, tty, display, yes_no(remote), remote_user, remote_host);
+
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
if (!reply) {
pam_syslog(handle, LOG_ERR, "Failed to create session: %s", bus_error_message(&error));
goto finish;
}
+ if (debug)
+ pam_syslog(handle, LOG_DEBUG, "Reply from logind: "
+ "id=%s object_path=%s runtime_path=%s session_fd=%d seat=%s vtnr=%u",
+ id, object_path, runtime_path, session_fd, seat, vtnr);
+
r = pam_misc_setenv(handle, "XDG_SESSION_ID", id, 0);
if (r != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to set session id.");