Mark Adler 72c70060d8 Assure that gzoffset() is correct when appending. ...

An open() with O_APPEND followed by an lseek() to determine the
position will return zero for a non-empty file, even though the
next write will start at the end of the file.  This commit works
around that by doing an lseek() to the end when appending.

2014-04-24 19:45:36 -04:00

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