X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=doc%2Fgzip.texi;fp=doc%2Fgzip.texi;h=195bab80512da89255d7fe40daa4b1907342f835;hb=a8a88eddaa90432e6ec1b8d9d5c9842bc91afd1d;hp=1d8d100fa81547eb0c3a60a5931ea1e0960db429;hpb=20fcfc81ece044b8b0a6768ec6cf47be4e22a2e6;p=debian%2Fgzip diff --git a/doc/gzip.texi b/doc/gzip.texi index 1d8d100..195bab8 100644 --- a/doc/gzip.texi +++ b/doc/gzip.texi @@ -12,7 +12,7 @@ This manual is for GNU Gzip (version @value{VERSION}, @value{UPDATED}), and documents commands for compressing and decompressing data. -Copyright @copyright{} 1998-1999, 2001-2002, 2006-2007, 2009-2016 Free Software +Copyright @copyright{} 1998-1999, 2001-2002, 2006-2007, 2009-2018 Free Software Foundation, Inc. Copyright @copyright{} 1992, 1993 Jean-loup Gailly @@ -83,7 +83,7 @@ Free Documentation License''. @command{gzip} reduces the size of the named files using Lempel--Ziv coding (LZ77). Whenever possible, each file is replaced by one with the extension @samp{.gz}, while keeping the same ownership modes, access and -modification times. (The default extension is @samp{-gz} for @abbr{VMS}, +modification times. (The default extension is @samp{z} for @abbr{MSDOS}, @abbr{OS/2} @abbr{FAT} and Atari.) If no files are specified or if a file name is @file{-}, the standard input is compressed to the standard @@ -98,15 +98,15 @@ For example, if file names are limited to 14 characters, gzip.msdos.exe is compressed to gzi.msd.exe.gz. Names are not truncated on systems which do not have a limit on file name length. -By default, @command{gzip} keeps the original file name and time stamp in +By default, @command{gzip} keeps the original file name and timestamp in the compressed file. These are used when decompressing the file with the @option{-N} option. This is useful when the compressed file name was -truncated or when the time stamp was not preserved after a file +truncated or when the timestamp was not preserved after a file transfer. However, due to limitations in the current @command{gzip} file -format, fractional seconds are discarded. Also, time stamps must fall -within the range 1970-01-01 00:00:00 through 2106-02-07 06:28:15 -@abbr{UTC}, and hosts whose operating systems use 32-bit time -stamps are further restricted to time stamps no later than 2038-01-19 +format, fractional seconds are discarded. Also, timestamps must fall +within the range 1970-01-01 00:00:01 through 2106-02-07 06:28:15 +@abbr{UTC}, and hosts whose operating systems use 32-bit timestamps +are further restricted to timestamps no later than 2038-01-19 03:14:07 @abbr{UTC}. The upper bounds assume the typical case where leap seconds are ignored. @@ -168,14 +168,14 @@ larger than the original. The worst case expansion is a few bytes for the @command{gzip} file header, plus 5 bytes every 32K block, or an expansion ratio of 0.015% for large files. Note that the actual number of used disk blocks almost never increases. @command{gzip} normally preserves the mode, -ownership and time stamps of files when compressing or decompressing. +ownership and timestamps of files when compressing or decompressing. The @command{gzip} file format is specified in P. Deutsch, GZIP file format specification version 4.3, -@uref{http://www.ietf.org/rfc/rfc1952.txt, Internet @abbr{RFC} 1952} (May +@uref{https://www.ietf.org/rfc/rfc1952.txt, Internet @abbr{RFC} 1952} (May 1996). The @command{zip} deflation format is specified in P. Deutsch, DEFLATE Compressed Data Format Specification version 1.3, -@uref{http://www.ietf.org/rfc/rfc1951.txt, Internet @abbr{RFC} 1951} (May +@uref{https://www.ietf.org/rfc/rfc1951.txt, Internet @abbr{RFC} 1951} (May 1996). @node Sample @@ -199,8 +199,8 @@ Mandatory arguments to long options are mandatory for short options too. -k, --keep keep (don't delete) input files -l, --list list compressed file contents -L, --license display software license - -n, --no-name do not save or restore the original name and time stamp - -N, --name save or restore the original name and time stamp + -n, --no-name do not save or restore the original name and timestamp + -N, --name save or restore the original name and timestamp -q, --quiet suppress all warnings -r, --recursive operate recursively on directories --rsyncable make rsync-friendly archive @@ -309,7 +309,7 @@ displayed: @example method: compression method (deflate,compress,lzh,pack) crc: the 32-bit CRC of the uncompressed data -date & time: time stamp for the uncompressed file +date & time: timestamp for the uncompressed file @end example The @abbr{CRC} is given as ffffffff for a file not in gzip format. @@ -334,20 +334,20 @@ Display the @command{gzip} license then quit. @item --no-name @itemx -n -When compressing, do not save the original file name and time stamp by +When compressing, do not save the original file name and timestamp by default. (The original name is always saved if the name had to be truncated.) When decompressing, do not restore the original file name if present (remove only the @command{gzip} suffix from the compressed file name) and do not restore the original -time stamp if present (copy it from the compressed file). This option +timestamp if present (copy it from the compressed file). This option is the default when decompressing. @item --name @itemx -N -When compressing, always save the original file name and time stamp; this +When compressing, always save the original file name and timestamp; this is the default. When decompressing, restore the original file name and -time stamp if present. This option is useful on systems which have -a limit on file name length or when the time stamp has been lost after +timestamp if present. This option is useful on systems which have +a limit on file name length or when the timestamp has been lost after a file transfer. @item --quiet @@ -507,10 +507,6 @@ export PATH=/usr/bin exec gzip -9 "$@@" @end example -On @abbr{VMS}, the name of the obsolescent environment variable is -@env{GZIP_OPT}, to avoid a conflict with the symbol set for invocation -of the program. - @node Tapes @chapter Using @command{gzip} on tapes @cindex tapes