* source/files : 'missingok' option

configs/conf-available/05-source-files.conf

@@ -1,2 +1,4 @@
 [source:files]
 load = source_files.so
+; allow source start if no files matched?
+missingok = no

src/sources/files.c

@@ -31,6 +31,7 @@ struct _config {
   f2b_file_t *files;
   f2b_file_t *current;
   int flags;
+  bool missingok;
   char path[256];
 };
 
@@ -147,10 +148,10 @@ config(cfg_t *cfg, const char *key, const char *value) {
   assert(key   != NULL);
   assert(value != NULL);
 
-  /* no options */
-  (void)(cfg);   /* suppress warning for unused variable 'ip' */
-  (void)(key);   /* suppress warning for unused variable 'ip' */
-  (void)(value); /* suppress warning for unused variable 'ip' */
+  if (strcmp(key, "missingok") == 0) {
+    cfg->missingok = (strcmp(value, "yes") == 0) ? true : false;
+    return true;
+  }
 
   return false;
 }
@@ -158,11 +159,15 @@ config(cfg_t *cfg, const char *key, const char *value) {
 bool
 start(cfg_t *cfg) {
   f2b_file_t *file = NULL;
+  int glob_flags = GLOB_MARK | GLOB_NOESCAPE;
   glob_t globbuf;
 
   assert(cfg != NULL);
 
-  if (glob(cfg->path, GLOB_MARK | GLOB_NOESCAPE, NULL, &globbuf) != 0)
+  if (cfg->missingok)
+    glob_flags |= GLOB_NOCHECK; /* allow no matches */
+
+  if (glob(cfg->path, glob_flags, NULL, &globbuf) != 0)
     return NULL;
 
   for (size_t i = 0; i < globbuf.gl_pathc; i++) {
@@ -172,7 +177,7 @@ start(cfg_t *cfg) {
       continue;
     }
     strlcpy(file->path, globbuf.gl_pathv[i], slen);
-    if (!file_open(cfg, file)) {
+    if (!file_open(cfg, file) && !cfg->missingok) {
       FREE(file);
       continue;
     }