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@@ -0,0 +1,496 @@ +GNU gzip NEWS -*- outline -*- + +* Noteworthy changes in release 1.8 (2016-04-26) [stable] + +** Bug fixes + + gzip -l no longer falsely reports a write error when writing to a pipe. + [bug introduced in gzip-1.7] + + Port to Oracle Solaris Studio 12 on x86-64. + [bug present since at least gzip-1.2.4] + + When configuring gzip, ./configure DEFS='...-DNO_ASM...' now + suppresses assembler again. [bug introduced in gzip-1.3.5] + + +* Noteworthy changes in release 1.7 (2016-03-27) [stable] + +** Changes in behavior + + The GZIP environment variable is now obsolescent; gzip now warns if + it is used, and rejects attempts to use dangerous options or operands. + You can use an alias or script instead. + + Installed programs like 'zgrep' now use the PATH environment variable + as usual to find subsidiary programs like 'gzip' and 'grep'. + Previously they prepended the installation directory to the PATH, + which sometimes caused 'make check' to test the wrong gzip executable. + [bug introduced in gzip-1.3.13] + +** New features + + gzip now accepts the --synchronous option, which causes it to use + fsync and similar primitives to transfer output data to the output + file's storage device when the file system supports this. Although + this option makes gzip safer in the presence of system crashes, it + can make gzip considerably slower. + + gzip now accepts the --rsyncable option. This option is accepted in + all modes, but has effect only when compressing: it makes the resulting + output more amenable to efficient use of rsync. For example, when a + large input file gets a small change, a gzip --rsyncable image of + that file will remain largely unchanged, too. Without --rsyncable, + even a tiny change in the input could result in a totally different + gzip-compressed output file. + +** Bug fixes + + gzip -k -v no longer reports that files are replaced. + [bug present since the beginning] + + zgrep -f A B C no longer reads A more than once if A is not a regular file. + This better supports invocations like 'zgrep -f <(COMMAND) B C' in Bash. + [bug introduced in gzip-1.2] + + +* 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 + + +Major changes in Gzip 1.3.12 (2007-04-13) + +* znew now uses $TMPDIR (default /tmp) instead of always using /tmp. + +* It is now documented that gzip ignores case when examining file name + extensions; for example, 'gzip test.Gz' (without -f) fails because + the file name ends in '.Gz'. + +Major changes in Gzip 1.3.11 (2007-02-05) + +* As per the GNU coding standards, the behavior of gzip and its + companion executables no longer depend on the name used to invoke them. + For example, 'gzip' and 'gunzip' are no longer hard links; + instead, 'gunzip' is now a small program that invokes 'gzip -d'. + +* zdiff now checks for subsidiary gzip failures, and works around + bugs in IRIX 6 sh, Tru64 4.0F ksh, and Solaris 8 bash. + +Major changes in Gzip 1.3.10 (2006-12-30) + +* gzip -c and zcat now work on special files, files with special mode bits, + and files with multiple hard links. +* gzip -q now exits with status 2 (not 1) when SIGPIPE is received. +* zcmp and zdiff did not work in the usual case, due to a typo. +* zgrep has many bugs fixed with argument handling, special characters, + and exit status. +* zless no longer mishandles $%=~ in file names. + +Gzip 1.3.9 (2006-12-15) + +* No major changes; only porting fixes. + +Major changes in Gzip 1.3.8 (2006-12-08) + +* Fix some gzip problems: + - A security fix from Debian 1.3.5-5 was inadvertently omitted. + - The assembler is now invoked with --noexecstack if supported, + so that gzip can better resist stack-smashing attacks. + +Major changes in Gzip 1.3.7 (2006-12-06) + +* Fix some gzip problems: + - Refuse to compress setuid or setgid files, or files with the sticky bit. + - Fix more race conditions in setting file permissions and owner, + removing output files, following symbolic links, and dealing with + special files. + - Remove most of the code working around ENAMETOOLONG deficiencies. + Systems with those deficiencies are long-dead, and the workarounds + had race conditions on modern hosts. + - Catch CPU time and file size limit signals, too. + - Check for read errors when closing files. + - Fix a core dump caused by a stray abort mistakenly introduced in 1.3.6. +* Fix some gzexe problems: + - Improve resistance to denial-of-service attacks. + - Fix some quoting and escaping bugs. + - Do not assume /tmp is sticky (though it should be!). + - Do not assume the working directory can be written. + - Rely on PATH in the generated executable, as the man page says. + - Don't assume IFS is sane. + - Exit with signal's status, if signaled. + +Major changes in Gzip 1.3.6 (2006-11-20) + +* Fix some race conditions in setting file time stamps, permissions, and owner. +* Fix some race conditions in signal handling. +* When gzip exits due to a signal, it exits with the signal's status, not 1. +* gzip now restores file time stamps to the resolution supported by the + time-setting primitives of the operating system, typically 1 microsecond. + Formerly it restored them only to the nearest second. +* gzip -r no longer attempts to reset the last-access times of directories + it reads, as this messes up when other processes are reading the directories. +* The options --version and --help now work on all gzip-installed executables, + and now use a format similar to other GNU programs. +* The manual is now distributed under the terms of the GNU Free + Documentation License without invariant sections or cover texts. +* Port to current versions of Autoconf, Automake, and Gnulib. + +Major changes from 1.3.4 to 1.3.5 +* gzip now removes any output symlink before writing output file. +* zgrep etc. scripts now port to POSIX 1003.1-2001 hosts. +* zforce no longer assumes 14-byte file name length limit. +* zless is now implemented using less and LESSOPEN, not zmore and PAGER. +* assembly-language speedups reenabled; were mistakenly disabled in 1.3. + +Major changes from 1.3.3 to 1.3.4 +* Less output is lost when decompressing a truncated file. +* The manual is now distributed under the terms of the GNU Free + Documentation License. + +No major changes in 1.3.2 or 1.3.3 (bug fixes only) + +Major changes from 1.3 to 1.3.1 +* zgrep now supports --, -H, -h, -L, -l, -C, -d, -m and their long equivalents. + +Major changes from 1.2.4 to 1.3 +* Add support for large files, e.g. files larger than 2 GB on Solaris 2.6. +* Adjust file size listing format for files larger than 10 GB. +* New command `zless'. +* `zdiff' now reports exit status like `diff' does. +* `zcat' is now always called `zcat', not `gzcat'. + Similarly for `zdiff', `zgrep', `zmore', `znew', `zforce'. +* Warn about a compressed file's trailing zeros only if verbose, + for compatibility with recent versions of GNU tar. +* Conform to changes to GNU makefile standards. +* Port to Autoconf 2.13. +* Convert to Automake. +* Fix bugs in the following areas: + - files larger than 4 GB + - security hole involving symlinks from /tmp + - security hole involving long file names + - permissions bug when compressing a symbolic link to a file + - core dumps + - concatenated compressed files on INBUFSIZ boundaries + - porting bugs on hosts with signed chars + - porting bug with upper and lower case + - porting bug for hosts that reserve the names `basename' or `warning' + +Major changes from 1.2.3 to 1.2.4 +* By default, do not restore file name and timestamp from those saved + inside the .gz file (behave as 'compress'). Added the --name option + to force name and timestamp restoration. +* Accept - as synonym for stdin. +* Use manlinks=so or ln to support either hard links or .so in man pages +* Accept foo.gz~ in zdiff. +* Added support for Windows NT +* Handle ENAMETOOLONG for strict Posix systems +* Use --recursive instead of --recurse to comply with Webster and + the GNU stdandard. +* Allow installation of shell scripts with a g prefix: make G=g install +* Install by default zcat as gzcat if gzcat already exists in path. +* Let zmore behave as more when invoked without parameters (give help) +* Let gzip --list reject files not in gzip format even with --force. +* Don't complain about non gzip files for options -rt or -rl. +* Added advice in INSTALL for several systems. + +Major changes from 1.2.2 to 1.2.3 +* Don't display the output name when decompressing except with --verbose. +* Remove usage of alloca in getopt.c and all makefiles. +* Added the zfile shell script in subdirectory sample. +* Moved the list of compiler bugs from README to INSTALL. +* Added vms/Readme.vms. + +Major changes from 1.2.1 to 1.2.2 +* Fix a compilation error on Sun with cc (worked with gcc). + +Major changes from 1.2 to 1.2.1 +* Let zmore act as more if the data is not gzipped. +* made gzexe more secure (don't rely on PATH). +* By default, display output name only when the name was actually truncated. + +Major changes from 1.1.2 to 1.2 +* Added the --list option to display the file characteristics. +* Added the --no-name option: do not save or restore original filename + Save the original name by default. +* Allow gunzip --suffix "" to attempt decompression on any file + regardless of its extension if an original name is present. +* Add support for the SCO compress -H format. +* gzip --fast now compresses faster (speed close to that of compress) + with degraded compression ratio (but still better than compress). + Default level changed to -6 (acts exactly as previous level -5) to + be a better indication of its placement in the speed/ratio range. +* Use smart name truncation: 123456789012.c -> 123456789.c.gz + instead of 12345678901.gz +* With --force, let zcat pass non gzip'ed data unchanged (zcat == cat) +* Added the zgrep shell script. +* Made sub.c useful for 16 bit sound, 24 bit images, etc.. +* Suppress warnings about suffix for gunzip -r, except with --verbose. +* On MSDOS, use .gz extension when possible (files without extension) +* Moved the sample programs to a subdirectory sample. +* Added a "Special targets" section in INSTALL. + +Major changes from 1.1.1 to 1.1.2. +* Fix serious bug for VMS (-gz not removed when decompressing). +* Allow suffix other than .gz in znew. +* Do not display compression ratio when decompressing stdin. +* In zmore.in, work around brain damaged stty -g (Ultrix). +* Display a correct compression ratio for .Z files. +* Added .z to .gz renaming script in INTALL. +* Allow setting CFLAGS in configure. + +Major changes from 1.1 to 1.1.1. +* Fix serious bug in vms.c (affects Vax/VMS only). +* Added --ascii option. +* Add workaround in configure.in for Ultrix (quote eval argument) + +Major changes from 1.0.7 to 1.1. +* Use .gz suffix by default, add --suffix option. +* Let gunzip accept a "_z" suffix (used by one 'compress' on Vax/VMS). +* Quit when reading garbage from stdin instead of reporting an error. +* Added makefile for VAX/MMS and support for wildcards on VMS. +* Added support for MSC under OS/2. +* Added support for Prime/PRIMOS. +* Display compression ratio also when decompressing (with --verbose). +* Quit after --version (GNU standard) +* Use --force to bypass isatty() check +* Continue processing other files in case of recoverable error. +* Added comparison of zip and gzip in the readme file. +* Added small sample programs (ztouch, sub, add) +* Use less memory when compiled with -DSMALL_MEM (for MSDOS). +* Remove the "off by more than one minute" time stamp kludge + +Major changes from 1.0.6 to 1.0.7. +* Allow zmore to read from standard input (like more). +* Support the 68000 (Atari ST) in match.S. +* Retry partial writes (required on Linux when gzip is suspended in a pipe). +* Allow full pathnames and renamings in gzexe. +* Don't let gzexe compress setuid executables or gzip itself. +* Added vms/Makefile.gcc for gcc on the Vax. +* Allow installation of binaries and shell scripts in different dirs. +* Allows complex PAGER variable in zmore (e.g.: PAGER="col -x | more") +* Allow installation of zcat as gzcat. +* Several small changes for portability to old or weird systems. +* Suppress help message and send compressed data to the terminal when + gzip is invoked without parameters and without redirection. +* Add compile option GNU_STANDARD to respect the GNU coding standards: + with -DGNU_STANDARD, behave as gzip even if invoked under the name gunzip. +(I don't like the last two changes, which were requested by the FSF.) + +Major changes from 1.0.5 to 1.0.6. +* Let gzexe detect executables that are already gzexe'd. +* Keep file attributes in znew and gzexe if cpmod is available. +* Don't try restoring record format on VMS (1.0.5 did not work correctly) +* Added asm version for 68000 in amiga/match.a. + Use asm version for Atari TT and NeXT. +* For OS/2, assume HPFS by default, add flag OS2FAT if necessary. +* Fixed some bugs in zdiff and define zcmp as a link to zdiff. + + +Major changes from 1.0.4 to 1.0.5. +* For VMS, restore the file type for variable record format, otherwise + extract in fixed length format (not perfect, but better than + forcing all files to be in stream_LF format). +* For VMS, use "-z" default suffix and accept a version number in file names. +* For Unix, allow compression of files with name ending in 'z'. Use only + .z, .*-z, .tgz, .taz as valid gzip extensions. In the last two cases, + extract to .tar by default. +* On some versions of MSDOS, files with a 3 character extension could not + be compressed. +* Garbage collect files in /tmp created by gzexe. +* Fix the 'OS code' byte in the gzip header. +* For the Amiga, add the missing utime.h and add support for gcc. + + +Major changes from 1.0.3 to 1.0.4. +* Added optimized asm version for 68020. +* Add support for DJGPP. + +* Add support for the Atari ST. +* Added zforce to rename gzip'ed files with truncated names. +* Do not install with name uncompress (some systems rely on the + absence of any check in the old uncompress). +* Added missing function (fcfree) in msdos/tailor.c +* Let gunzip handle .tgz files, and let gzip skip them. +* Added -d option (decompress) for gzexe and try preserving file permissions. +* Suppress all warnings with -q. +* Use GZIP_OPT for VMS to avoid conflict with program name. +* ... and many other small changes (see ChangeLog) + + +Major changes from 1.0.2 to 1.0.3 +* Added -K option for znew to keep old .Z files if smaller +* Added -q option (quiet) to cancel -v in GZIP env variable. +* Made gzexe safer on systems with filename limitation to 14 chars. +* Fixed bugs in handling of GZIP env variable and incorrect free with Turbo C. + + +Major changes from 1.0.1 to 1.0.2 +* Added env variable GZIP for default options. Example: + for sh: GZIP="-8 -v"; export GZIP + for csh: setenv GZIP "-8 -v" +* Added support for the Amiga. +* znew now keeps the old .Z if it is smaller than the .z file. + This can happen for some large and very redundant files. +* Do not complain about trailing garbage for record oriented IO (Vax/VMS). + This implies however that multi-part gzip files are not supported + on such systems. +* Added gzexe to compress rarely used executables. +* Reduce memory usage (required for MSDOS and useful on all systems). +* Preserve time stamp in znew -P (pipe option) if touch -r works. + + +Major changes from 1.0 to 1.0.1 +* fix trivial errors in the Borland makefile (msdos/Makefile.bor) + + +Major changes from 0.8.2 to 1.0 +* gzip now runs on Vax/VMS +* gzip will not not overwrite files without -f when using /bin/sh in + background. +* Support the test option -t for compressed (.Z) files. + Allow some data recovery for bad .Z files. +* Added makefiles for MSDOS (Only tested for MSC, not Borland). +* still more changes to configure for several systems + + +Major changes from 0.8.1 to 0.8.2: +* yet more changes to configure for Linux and other systems +* Allow zcat on a file with multiple links. + + +Major changes from 0.8 to 0.8.1: +* znew has now a pipe option -P to reduce the disk space requirements, + but this option does not preserve timestamps. +* Fixed some #if directives for compilation with TurboC. + + +Major changes from 0.7 to 0.8: +* gzip can now extract .z files created by 'pack'. +* configure should no longer believe that every machine is a 386 +* Fix the entry for /etc/magic in INSTALL. +* Add patch for GNU tar 1.11.1 and a pointer to crypt++.el +* Uncompress files with multiple links only with -f. +* Fix for uncompress of .Z files on 16-bit machines +* Create a correct output name for file names of exactly N-1 chars when + the system has a limit of N chars. + + +Major changes from 0.6 to 0.7: +* Use "make check" instead of "make test". +* Keep time stamp and pass options to gzip in znew. +* Do not create .z.z files with gzip -r. +* Allow again gunzip .zip files (was working in 0.5) +* Allow again compilation with TurboC 2.0 (was working in 0.4) + + +Major changes form 0.5 to 0.6: +* gunzip reported an error when extracting certain .z files. The .z files + produced by gzip 0.5 are correct and can be read by gunzip 0.6. +* gunzip now supports multiple compressed members within a single .z file. +* Fix the check for i386 in configure. +* Added "make test" to check for compiler bugs. (gcc -finline-functions + is broken at least on the NeXT.) +* Use environment variable PAGER in zmore if it is defined. +* Accept gzcat in addition to zcat for people having /usr/bin before + /usr/local/bin in their path. + + +======================================================================== + +Copyright (C) 1999, 2001-2002, 2006-2007, 2009-2016 Free Software Foundation, +Inc. +Copyright (C) 1992, 1993 Jean-loup Gailly + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, with no Front-Cover Texts, and with no Back-Cover +Texts. A copy of the license is included in the ``GNU Free +Documentation License'' file as part of this distribution. |