-/*************************************************
-* Berkeley DB error callback *
-*************************************************/
-
-/* For Berkeley DB >= 2, we can define a function to be called in case of DB
-errors. This should help with debugging strange DB problems, e.g. getting "File
-exists" when you try to open a db file. The API for this function was changed
-at DB release 4.3. */
-
-#if defined(USE_DB) && defined(DB_VERSION_STRING)
-void
-#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
-dbfn_bdb_error_callback(const DB_ENV *dbenv, const char *pfx, const char *msg)
-{
-dbenv = dbenv;
-#else
-dbfn_bdb_error_callback(const char *pfx, char *msg)
-{
-#endif
-pfx = pfx;
-log_write(0, LOG_MAIN, "Berkeley DB error: %s", msg);
-}
-#endif
-
-
-
-
-static enum {
- PRIV_DROPPING, PRIV_DROPPED,
- PRIV_RESTORING, PRIV_RESTORED
-} priv_state = PRIV_RESTORED;
-
-static uid_t priv_euid;
-static gid_t priv_egid;
-static gid_t priv_groups[EXIM_GROUPLIST_SIZE + 1];
-static int priv_ngroups;
-
-/* Inspired by OpenSSH's temporarily_use_uid(). Thanks! */
-
-static void
-priv_drop_temp(const uid_t temp_uid, const gid_t temp_gid)
-{
-if (priv_state != PRIV_RESTORED) _exit(EXIT_FAILURE);
-priv_state = PRIV_DROPPING;
-
-priv_euid = geteuid();
-if (priv_euid == root_uid)
- {
- priv_egid = getegid();
- priv_ngroups = getgroups(nelem(priv_groups), priv_groups);
- if (priv_ngroups < 0) _exit(EXIT_FAILURE);
-
- if (priv_ngroups > 0 && setgroups(1, &temp_gid) != 0) _exit(EXIT_FAILURE);
- if (setegid(temp_gid) != 0) _exit(EXIT_FAILURE);
- if (seteuid(temp_uid) != 0) _exit(EXIT_FAILURE);
-
- if (geteuid() != temp_uid) _exit(EXIT_FAILURE);
- if (getegid() != temp_gid) _exit(EXIT_FAILURE);
- }
-
-priv_state = PRIV_DROPPED;
-}
-
-/* Inspired by OpenSSH's restore_uid(). Thanks! */
-
-static void
-priv_restore(void)
-{
-if (priv_state != PRIV_DROPPED) _exit(EXIT_FAILURE);
-priv_state = PRIV_RESTORING;
-
-if (priv_euid == root_uid)
- {
- if (seteuid(priv_euid) != 0) _exit(EXIT_FAILURE);
- if (setegid(priv_egid) != 0) _exit(EXIT_FAILURE);
- if (priv_ngroups > 0 && setgroups(priv_ngroups, priv_groups) != 0) _exit(EXIT_FAILURE);
-
- if (geteuid() != priv_euid) _exit(EXIT_FAILURE);
- if (getegid() != priv_egid) _exit(EXIT_FAILURE);
- }
-
-priv_state = PRIV_RESTORED;
-}
-
-
-
-