avformat/hdsenc: Check rename() return value

Fixes CID1135748
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/hdsenc.c

@@ -204,7 +204,10 @@ static int write_manifest(AVFormatContext *s, int final)
     avio_printf(out, "</manifest>\n");
     avio_flush(out);
     avio_close(out);
-    rename(temp_filename, filename);
+    if (rename(temp_filename, filename) == -1) {
+        av_log(s, AV_LOG_ERROR, "failed to rename file %s to %s\n", temp_filename, filename);
+        return AVERROR(errno);
+    }
     return 0;
 }
 
@@ -286,7 +289,10 @@ static int write_abst(AVFormatContext *s, OutputStream *os, int final)
     update_size(out, afrt_pos);
     update_size(out, 0);
     avio_close(out);
-    rename(temp_filename, filename);
+    if (rename(temp_filename, filename) == -1) {
+        av_log(s, AV_LOG_ERROR, "failed to rename file %s to %s\n", temp_filename, filename);
+        return AVERROR(errno);
+    }
     return 0;
 }
 
@@ -475,7 +481,10 @@ static int hds_flush(AVFormatContext *s, OutputStream *os, int final,
 
     snprintf(target_filename, sizeof(target_filename),
              "%s/stream%dSeg1-Frag%d", s->filename, index, os->fragment_index);
-    rename(os->temp_filename, target_filename);
+    if (rename(os->temp_filename, target_filename) == -1) {
+        av_log(s, AV_LOG_ERROR, "failed to rename file %s to %s\n", os->temp_filename, target_filename);
+        return AVERROR(errno);
+    }
     add_fragment(os, target_filename, os->frag_start_ts, end_ts - os->frag_start_ts);
 
     if (!final) {