X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Ffile.c;h=cca9ec1a06478cbeff51e6ac6b9414cca3715cf1;hb=298a587f447fbc9103f66a50b8433aab977afc9b;hp=31067ede69b0f16b26269fd28f7f5b3528d4f81d;hpb=c486dade95ba529151391a7879538c9d4787752b;p=ffmpeg

diff --git a/libavformat/file.c b/libavformat/file.c
index 31067ede69b..cca9ec1a064 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -1,5 +1,5 @@
 /*
- * Buffered file io for ffmpeg system
+ * buffered file I/O
  * Copyright (c) 2001 Fabrice Bellard
  *
  * This file is part of Libav.
@@ -51,6 +51,19 @@ static int file_get_handle(URLContext *h)
     return (intptr_t) h->priv_data;
 }
 
+static int file_check(URLContext *h, int mask)
+{
+    struct stat st;
+    int ret = stat(h->filename, &st);
+    if (ret < 0)
+        return AVERROR(errno);
+
+    ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ  : 0;
+    ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
+
+    return ret;
+}
+
 #if CONFIG_FILE_PROTOCOL
 
 static int file_open(URLContext *h, const char *filename, int flags)
@@ -60,9 +73,9 @@ static int file_open(URLContext *h, const char *filename, int flags)
 
     av_strstart(filename, "file:", &filename);
 
-    if (flags & AVIO_RDWR) {
+    if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
         access = O_CREAT | O_TRUNC | O_RDWR;
-    } else if (flags & AVIO_WRONLY) {
+    } else if (flags & AVIO_FLAG_WRITE) {
         access = O_CREAT | O_TRUNC | O_WRONLY;
     } else {
         access = O_RDONLY;
@@ -103,6 +116,7 @@ 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 */
@@ -117,7 +131,7 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
 
     fd = strtol(filename, &final, 10);
     if((filename == final) || *final ) {/* No digits found, or something like 10ab */
-        if (flags & AVIO_WRONLY) {
+        if (flags & AVIO_FLAG_WRITE) {
             fd = 1;
         } else {
             fd = 0;
@@ -137,6 +151,7 @@ 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 */