From: Stefano Sabatini <stefano.sabatini-l...@poste.it>

---
 libavformat/file.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/libavformat/file.c b/libavformat/file.c
index 31067ed..6eabdae 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -95,6 +95,16 @@ static int file_close(URLContext *h)
     return close(fd);
 }
 
+static int file_check(URLContext *h, int flags)
+{
+    struct stat st;
+    int ret = stat(h->filename, &st);
+    if (ret < 0)
+        return AVERROR(errno);
+
+    return !!(st.st_mode & flags);
+}
+
 URLProtocol ff_file_protocol = {
     .name                = "file",
     .url_open            = file_open,
@@ -103,6 +113,7 @@ URLProtocol ff_file_protocol = {
     .url_seek            = file_seek,
     .url_close           = file_close,
     .url_get_file_handle = file_get_handle,
+    .url_check           = file_check,
 };
 
 #endif /* CONFIG_FILE_PROTOCOL */
@@ -137,6 +148,7 @@ URLProtocol ff_pipe_protocol = {
     .url_read            = file_read,
     .url_write           = file_write,
     .url_get_file_handle = file_get_handle,
+    .url_check           = file_check,
 };
 
 #endif /* CONFIG_PIPE_PROTOCOL */
-- 
1.7.4.1

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