/* Copyright (c) The Exim Maintainers 2020 - 2022 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/* This module provides TLS (aka SSL) support for Exim. The code for OpenSSL is
based on a patch that was originally contributed by Steve Haslam. It was
tls_set_one_watch(const uschar * filename)
# ifdef EXIM_HAVE_INOTIFY
{
+uschar buf[PATH_MAX];
+ssize_t len;
uschar * s;
if (Ustrcmp(filename, "system,cache") == 0) return TRUE;
-
if (!(s = Ustrrchr(filename, '/'))) return FALSE;
+
+for (unsigned loop = 20;
+ (len = readlink(CCS filename, CS buf, sizeof(buf))) >= 0; )
+ { /* a symlink */
+ if (--loop == 0) { errno = ELOOP; return FALSE; }
+ filename = buf[0] == '/'
+ ? string_copyn(buf, (unsigned)len) /* mem released by tls_set_watch */
+ : string_sprintf("%.*s/%.*s", (int)(s - filename), filename, (int)len, buf);
+ s = Ustrrchr(filename, '/');
+ }
+if (errno != EINVAL)
+ return FALSE; /* other error */
+
+/* not a symlink */
s = string_copyn(filename, s - filename); /* mem released by tls_set_watch */
-DEBUG(D_tls) debug_printf("watch dir '%s'\n", s);
-/*XXX unclear what effect symlinked files will have for inotify */
+DEBUG(D_tls) debug_printf("watch dir '%s'\n", s);
if (inotify_add_watch(tls_watch_fd, CCS s,
IN_ONESHOT | IN_CLOSE_WRITE | IN_DELETE | IN_DELETE_SELF
#endif
tls_server_creds_invalidate();
+
+/* _expire is for a time-limited selfsign server cert */
tls_creds_expire = (lifetime = tls_server_creds_init())
? time(NULL) + lifetime : 0;