From b49a7d90708e816120ff88ce5a88fa62b35ff795 Mon Sep 17 00:00:00 2001 From: Simo Sorce Date: Tue, 10 Sep 2013 18:24:41 -0400 Subject: util: Use systemd-login to check user sessions Use systemd-lgin in preference to check if the user is logged in or not. Fall back to the old method if no systemd-login support is available at compile time or if it returns a fatal error, and can't determine the status of the user on its own. This will allow to consider a user really active (in order to reuse or refresh crdentials) only if it really is logged into the system, and not just if one of the user's processes is stuck around. Resolves: https://fedorahosted.org/sssd/ticket/2084 --- src/util/find_uid.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'src/util') diff --git a/src/util/find_uid.c b/src/util/find_uid.c index d34a4abd2..63b346457 100644 --- a/src/util/find_uid.c +++ b/src/util/find_uid.c @@ -40,6 +40,10 @@ #include "util/util.h" #include "util/strtonum.h" +#ifdef HAVE_SYSTEMD_LOGIN +#include +#endif + #define INITIAL_TABLE_SIZE 64 #define PATHLEN (NAME_MAX + 14) #define BUFSIZE 4096 @@ -301,6 +305,22 @@ errno_t check_if_uid_is_active(uid_t uid, bool *result) { int ret; +#ifdef HAVE_SYSTEMD_LOGIN + ret = sd_uid_get_sessions(uid, 0, NULL); + if (ret > 0) { + *result = true; + } + if (ret == 0) { + *result = false; + } + if (ret >= 0) { + return EOK; + } + DEBUG(SSSDBG_CRIT_FAILURE, ("systemd-login gave error %d: %s\n", + -ret, strerror(-ret))); + /* fall back to the old method */ +#endif + ret = get_active_uid_linux(NULL, uid); if (ret != EOK && ret != ENOENT) { DEBUG(1, ("get_uid_table failed.\n")); -- cgit