Rename config option ignore_missing_paths to ignore_unavailable. Update logic to retain permision errors.

Signed-off-by: ner216 <provencher.nolan@gmail.com>

Author: ner216

plugins/in_tail/tail.c

@@ -577,8 +577,8 @@ static struct flb_config_map config_map[] = {
      "files matching a certain criteria, e.g: 'exclude_path *.gz,*.zip'"
     },
     {
-     FLB_CONFIG_MAP_BOOL, "ignore_missing_paths", "false",
-     0, FLB_TRUE, offsetof(struct flb_tail_config, ignore_missing_paths),
+     FLB_CONFIG_MAP_BOOL, "ignore_unavailable", "false",
+     0, FLB_TRUE, offsetof(struct flb_tail_config, ignore_unavailable),
      "Do not search directories that do not exist for files."
     },
     {

plugins/in_tail/tail_config.h

@@ -88,7 +88,7 @@ struct flb_tail_config {
     long refresh_interval_nsec;/* nanoseconds to re-scan       */
     int read_newly_discovered_files_from_head; /* read new files from head after startup */
     int read_from_head;        /* read new files from head     */
-    int ignore_missing_paths;  /* Ignore directory paths that do not exist */
+    int ignore_unavailable;  /* Ignore directory paths that do not exist */
     int rotate_wait;           /* sec to wait on rotated files */
     int watcher_interval;      /* watcher interval             */
     int ignore_older;          /* ignore fields older than X seconds */

plugins/in_tail/tail_scan.c

@@ -114,7 +114,7 @@ int flb_tail_scan(struct mk_list *path_list, struct flb_tail_config *ctx)
             flb_plg_debug(ctx->ins, "%i new files found on path '%s'",
                           ret, pattern->str);
         }
-        else if (!ctx->ignore_missing_paths) {
+        else if (!ctx->ignore_unavailable) {
             flb_plg_warn(ctx->ins, "error scanning path: %s", pattern->str);
         }
     }

plugins/in_tail/tail_scan_glob.c

@@ -183,7 +183,6 @@ static inline int do_glob(const char *pattern, int flags,
     return ret;
 }
 
-
 /* Scan a path, register the entries and return how many */
 static int tail_scan_path(const char *path, struct flb_tail_config *ctx)
 {
@@ -212,16 +211,23 @@ static int tail_scan_path(const char *path, struct flb_tail_config *ctx)
             flb_plg_error(ctx->ins, "no memory space available");
             return -1;
         case GLOB_ABORTED:
-            if (!ctx->ignore_missing_paths) {
-                flb_plg_error(ctx->ins, "read error, check permissions: %s", path);
+            if (errno == EACCES) {
+                flb_plg_error(ctx->ins, "NO read access for path: %s", path);
+            } else if (!ctx->ignore_unavailable) {
+                switch (errno) {
+                    case ENOENT:
+                        flb_plg_warn(ctx->ins, "No such file at path: %s", path);
+                    case ENOTDIR:
+                        flb_plg_error(ctx->ins, "Not directory at path: %s", path);
+                    default:
+                        flb_plg_error(ctx->ins, "Unable to read path: %s", path);
+                }
             }
             return -1;
         case GLOB_NOMATCH:
             ret = stat(path, &st);
             if (ret == -1) {
-                if (!ctx->ignore_missing_paths) {
-                    flb_plg_debug(ctx->ins, "cannot read info from: %s", path);
-                }
+                flb_plg_debug(ctx->ins, "cannot read info from: %s", path);
             }
             else {
                 ret = access(path, R_OK);