+GNU gzip NEWS -*- outline -*-
+
+* Noteworthy changes in release 1.6 (2013-06-09) [stable]
+
+** New features
+
+ gzip now accepts the --keep (-k) option, for consistency with tools
+ like xz, lzip and bzip2. With this option, gzip no longer removes
+ named input files when compressing or decompressing.
+
+** Bug fixes
+
+ gzip -d no longer malfunctions with certain invalid data in 'pack' format.
+ [bug introduced in gzip-0.8]
+
+ When overwriting, gzip no longer acts as if you typed "y" when you type "n",
+ on some platforms when compiled with optimization.
+ [bug introduced in gzip-1.3.6]
+
+ zgrep no longer malfunctions with a multi-digit context option like -15.
+ Now, it passes that option to grep (equivalent to -C15) just as it does
+ for single-digit options. [bug introduced in gzip-1.3.12]
+
+ zmore now acts more like 'more', and is more portable to POSIXish hosts.
+
+
+* Noteworthy changes in release 1.5 (2012-06-17) [stable]
+
+** Bug fixes
+
+ gzip -d now decodes and checks header CRC16 checksums as specified by
+ the FHCRC section of Internet RFC 1952.
+
+ "gzip -d -S '' precious.gz" is now rejected immediately. Before,
+ that command would emulate "rm -i precious.gz", but with an easily-
+ misunderstood prompt. I.e., gzip would ask if it's ok to remove the
+ existing file, "precious.gz". If you made the mistake of saying "yes",
+ it would remove that input file before attempting to uncompress it.
+
+ gzip -cdf now properly handles input consisting of gzip'd data followed
+ by uncompressed data. Before it would output raw compressed input, too.
+ For example, now "(printf x|gzip; echo y)|gzip -dcf" prints "xy\n",
+ while before it would print "x<compressed data>y\n".
+
+ gzip -rf no longer compresses files more than once (e.g., replacing
+ FOO with FOO.gz.gz) on file systems such as ZFS where a readdir
+ loop that unlinks and creates files can revisit output files.
+
+
+* Noteworthy changes in release 1.4 (2010-01-20) [stable]
+
+** Bug fixes
+
+ gzip -d could segfault and/or clobber the stack, possibly leading to
+ arbitrary code execution. This affects x86_64 but not 32-bit systems.
+ This fixes CVE-2010-0001.
+ For more details, see http://bugzilla.redhat.com/554418
+
+ gzip -d would fail with a CRC error for some valid inputs.
+ So far, the only valid input known to exhibit this failure was
+ compressed "from FAT filesystem (MS-DOS, OS/2, NT)". In addition,
+ to trigger the failure, your memcpy implementation must copy in
+ the "reverse" order.
+
+
+* Noteworthy changes in release 1.3.14 (2009-10-30) [beta]
+
+** Bug fixes
+
+ gzip no longer fails when there is exactly one trailing NUL byte
+ gzip has always accepted trailing NUL bytes. Note the plural.
+
+ zdiff would exit with status 2 (indicating an error) rather than 1 to
+ indicate differences when both inputs were compressed and different.
+
+ zdiff would fail to print differences in two compressed inputs
+
+ zgrep -f - didn't work
+
+
+* Noteworthy changes in release 1.3.13 (2009-09-30) [stable]
+
+** 'gzip -f foo.gz' now creates a file foo.gz.gz instead of complaining.
+
+** Bug fixes
+
+ gzip -d no longer fails with "-" as 2nd or subsequent argument
+
+ gzip no longer ignores a close-induced write failure, e.g., on NFS
+
+ gzip -d no longer segfaults on certain invalid inputs
+
+