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-rw-r--r--net/base/file_stream.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/base/file_stream.h b/net/base/file_stream.h
index 9447c07..470c3c6 100644
--- a/net/base/file_stream.h
+++ b/net/base/file_stream.h
@@ -112,6 +112,8 @@ class FileStream {
// Truncates the file to be |bytes| length. This is only valid for writable
// files. After truncation the file stream is positioned at |bytes|. The new
// position is retured, or a value < 0 on error.
+ // WARNING: one may not truncate a file beyond its current length on any
+ // platform with this call.
int64 Truncate(int64 bytes);
private: