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, 29 insertions, 17 deletions

diff --git a/nscd/cache.c b/nscd/cache.c
index ebc6e4c..58f0bcc 100644
--- a/nscd/cache.c
+++ b/nscd/cache.c
@@ -264,28 +264,40 @@ prune_cache (struct database_dyn *table, time_t now, int fd)
 
   /* If we check for the modification of the underlying file we invalidate
      the entries also in this case.  */
-  if (table->inotify_descr < 0 && table->check_file && now != LONG_MAX)
+  if (table->check_file && now != LONG_MAX)
     {
-      struct stat64 st;
+      struct traced_file *runp = table->traced_files;
 
-      if (stat64 (table->filename, &st) < 0)
+      while (runp != NULL)
 	{
-	  char buf[128];
-	  /* We cannot stat() the file, disable file checking if the
-	     file does not exist.  */
-	  dbg_log (_("cannot stat() file `%s': %s"),
-		   table->filename, strerror_r (errno, buf, sizeof (buf)));
-	  if (errno == ENOENT)
-	    table->check_file = 0;
-	}
-      else
-	{
-	  if (st.st_mtime != table->file_mtime)
+#ifdef HAVE_INOTIFY
+	  if (runp->inotify_descr == -1)
+#endif
 	    {
-	      /* The file changed.  Invalidate all entries.  */
-	      now = LONG_MAX;
-	      table->file_mtime = st.st_mtime;
+	      struct stat64 st;
+
+	      if (stat64 (runp->fname, &st) < 0)
+		{
+		  char buf[128];
+		  /* We cannot stat() the file, disable file checking if the
+		     file does not exist.  */
+		  dbg_log (_("cannot stat() file `%s': %s"),
+			   runp->fname, strerror_r (errno, buf, sizeof (buf)));
+		  if (errno == ENOENT)
+		    table->check_file = 0;
+		}
+	      else
+		{
+		  if (st.st_mtime != table->file_mtime)
+		    {
+		      /* The file changed.  Invalidate all entries.  */
+		      now = LONG_MAX;
+		      table->file_mtime = st.st_mtime;
+		    }
+		}
 	    }
+
+	  runp = runp->next;
 	}
     }