From: Thomas Daede <daede003@umn.edu>

Date: Mon, 28 Jan 2019 23:33:32 +0000 (-0800)

Subject: Port opus-tools check to see if underlying file was overwritten.

X-Git-Url: http://git.xiph.org/?p=vorbis.git;a=commitdiff_plain;h=603cd941ea32576bdbca33c9d5625d878cd0d1c9

Port opus-tools check to see if underlying file was overwritten.

---

diff --git a/lib/vorbisfile.c b/lib/vorbisfile.c

index 831cb39..6b7bbee 100644

--- a/lib/vorbisfile.c

+++ b/lib/vorbisfile.c

@@ -264,6 +264,10 @@ static ogg_int64_t _get_prev_page_serial(OggVorbis_File *vf, ogg_int64_t begin,

}

}

}

+ /*We started from the beginning of the stream and found nothing.

+ This should be impossible unless the contents of the stream changed out

+ from under us after we read from it.*/

+ if(!begin&&vf->offset<0)return OV_EBADLINK;

}

/* we're not interested in the page... just the serialno and granpos. */