file.c/__ast_file_read_dirs: Fix issues on filesystems without d_type

One of the code paths in __ast_file_read_dirs will only get executed if
the OS doesn't support dirent->d_type OR if the filesystem the
particular file is on doesn't support it.  So, while standard Linux
systems support the field, some filesystems like XFS do not.  In this
case, we need to call stat() to determine whether the directory entry
is a file or directory so we append the filename to the supplied
directory path and call stat.  We forgot to truncate path back to just
the directory afterwards though so we were passing a complete file name
to the callback in the dir_name parameter instead of just the directory
name.

The logic has been re-written to only create a full_path if we need to
call stat() or if we need to descend into another directory.

Change-Id: I54e4228bd8355fad65200c6df3ec4c9c8a98dfba

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/test_file.c b/tests/test_file.c
index 64bad9218..bb8a99584 100644
--- a/tests/test_file.c
+++ b/tests/test_file.c
@@ -21,7 +21,10 @@
 	<support_level>core</support_level>
  ***/
 
+
 #include "asterisk.h"
+#include <sys/stat.h>
+#include <stdio.h>
 
 #include "asterisk/file.h"
 #include "asterisk/paths.h"
@@ -115,6 +118,17 @@ static char *test_files_get_one(struct _filenames *filenames, int num)
 
 static int handle_find_file(const char *dir_name, const char *filename, void *obj)
 {
+	struct stat statbuf;
+	char *full_path = ast_alloca(strlen(dir_name) + strlen(filename) + 2);
+
+	sprintf(full_path, "%s/%s", dir_name, filename);
+
+	errno = 0;
+	if (stat(full_path, &statbuf)) {
+		ast_log(LOG_ERROR, "Error reading path stats - %s: %s\n",
+			full_path, strerror(errno));
+		return 0;
+	}
 	/* obj contains the name of the file we are looking for */
 	return strcmp(obj, filename) ? 0 : FOUND;
 }