Fix gzopen/gzclose correctness issues - #66
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- gzopen: check for open() failure (fd < 0) and gzdopen() failure (file == NULL) before registering the file in the map. Previously a failed open would pass fd=-1 to gzdopen, store a NULL-keyed map entry, and leak the fd on gzdopen failure. - gzclose: use off_t instead of int for the lseek return value to avoid truncation on files larger than 2 GiB. The truncated value caused truncate() to corrupt large files. Signed-off-by: Mulugeta Mammo <mulugeta.mammo@intel.com>
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gzopen: check for open() failure (fd < 0) and gzdopen() failure (file == NULL) before registering the file in the map. Previously a failed open would pass fd=-1 to gzdopen, store a NULL-keyed map entry, and leak the fd on gzdopen failure.
gzclose: use off_t instead of int for the lseek return value to avoid truncation on files larger than 2 GiB. The truncated value caused truncate() to corrupt large files.