From: Timo Sirainen <tss@iki.fi>
Date: Tue, 27 Nov 2012 23:43:24 +0000 (+0200)
Subject: i_stream_default_stat(): If we can't know the size, return -1 instead of assert crash.
X-Git-Tag: 2.2.beta1~83
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9db5ade1c16c7f67c51004f28c28ea335755d3f0;p=thirdparty%2Fdovecot%2Fcore.git

i_stream_default_stat(): If we can't know the size, return -1 instead of assert crash.
This fixes a crash saving to mdbox when input stream's size wasn't known.
---

diff --git a/src/lib/istream.c b/src/lib/istream.c
index 9179f607f2..0eb0ac6cd9 100644
--- a/src/lib/istream.c
+++ b/src/lib/istream.c
@@ -623,13 +623,13 @@ i_stream_default_stat(struct istream_private *stream, bool exact)
 	if (stream->parent == NULL)
 		return 0;
 
-	if (exact && !stream->stream_size_passthrough) {
-		i_panic("istream %s: stat() doesn't support getting exact size",
-			i_stream_get_name(&stream->istream));
-	}
 	if (i_stream_stat(stream->parent, exact, &st) < 0)
 		return -1;
 	stream->statbuf = *st;
+	if (exact && !stream->stream_size_passthrough) {
+		/* exact size is not known, even if parent returned something */
+		stream->statbuf.st_size = -1;
+	}
 	return 0;
 }