Generalize framework to register monitoring of files in nscd

nscd can clear caches when certain files change.  The list of files
was hardcoded so far and worked for nss_files and nss_dns and those
modules which need no monitoring.  nss_db, for instance, has its
own set of files to monitor.  Now the NSS modules themselves can
request that certain files are monitored.

1 files changed, 72 insertions, 0 deletions

diff --git a/nss/nss_files/files-init.c b/nss/nss_files/files-init.c
new file mode 100644
index 0000000..cc6822d
--- /dev/null
+++ b/nss/nss_files/files-init.c
@@ -0,0 +1,72 @@
+/* Initialization in nss_files module.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <nscd/nscd.h>
+
+
+static union
+{
+  struct traced_file file;
+  char buf[sizeof (struct traced_file) + sizeof ("/etc/passwd")];
+} pwd_traced_file;
+
+static union
+{
+  struct traced_file file;
+  char buf[sizeof (struct traced_file) + sizeof ("/etc/group")];
+} grp_traced_file;
+
+static union
+{
+  struct traced_file file;
+  char buf[sizeof (struct traced_file) + sizeof ("/etc/hosts")];
+} hst_traced_file;
+
+static union
+{
+  struct traced_file file;
+  char buf[sizeof (struct traced_file) + sizeof ("/etc/resolv.conf")];
+} resolv_traced_file;
+
+static union
+{
+  struct traced_file file;
+  char buf[sizeof (struct traced_file) + sizeof ("/etc/services")];
+} serv_traced_file;
+
+
+void
+_nss_files_init (void (*cb) (size_t, struct traced_file *))
+{
+  strcpy (pwd_traced_file.file.fname, "/etc/passwd");
+  cb (pwddb, &pwd_traced_file.file);
+
+  strcpy (grp_traced_file.file.fname, "/etc/group");
+  cb (grpdb, &grp_traced_file.file);
+
+  strcpy (hst_traced_file.file.fname, "/etc/hosts");
+  cb (hstdb, &hst_traced_file.file);
+
+  resolv_traced_file.file.call_res_init = 1;
+  strcpy (resolv_traced_file.file.fname, "/etc/resolv.conf");
+  cb (hstdb, &resolv_traced_file.file);
+
+  strcpy (serv_traced_file.file.fname, "/etc/services");
+  cb (servdb, &serv_traced_file.file);
+}