Updated: sed-4.1.2-1

Corinna Vinschen corinna-cygwin@cygwin.com
Sun Aug 22 17:13:00 GMT 2004

I've updated the version of sed to 4.1.2-1.

This is the latest stable sed release 4.1.2.

Changes since 4.0.9:

Sed 4.1:

  // matches the last regular expression even in POSIXLY_CORRECT mode.

  change the way we treat lines which are not terminated by a newline.
  Such lines are printed without the terminating newline (as before)
  but as soon as more text is sent to the same output stream, the
  missing newline is printed, so that the two lines don't concatenate.
  The behavior is now independent from POSIXLY_CORRECT because POSIX
  actually has undefined behavior in this case, and the new implementation
  arguably gives the ``least expected surprise''.  Thanks to Stepan
  Kasal for the implementation.

  documentation improvements, with updated references to the POSIX.2

  error messages on I/O errors are better, and -i does not leave temporary
  files around (e.g. when running ``sed -i'' on a directory).

  escapes are accepted in the y command (for example: y/o/\n/ transforms
  o's into newlines)

  -i option tries to set the owner and group to the same as the input file

  `L' command is deprecated and will be removed in sed 4.2.

  line number addresses are processed differently -- this is supposedly
  conformant to POSIX and surely more idiot-proof.  Line number addresses
  are not affected by jumping around them: they are activated and
  deactivated exactly where the script says, while previously
  would actually delete lines 1,2,3,4 and 9 (!).

  multibyte characters are taken in consideration to compute the
  operands of s and y, provided you set LC_CTYPE correctly.  They are
  also considered by \l, \L, \u, \U, \E.

  [\n] matches either backslash or 'n' when POSIXLY_CORRECT.

  new option --posix, disables all GNU extensions.  POSIXLY_CORRECT only
  disables GNU extensions that violate the POSIX standard.

  options -h and -V are not supported anymore, use --help and --version.

  removed documentation for \s and \S which worked incorrectly

  restored correct behavior for \w and \W: match [[:alnum:]_] and
  [^[:alnum:]_] (they used to match [[:alpha:]_] and [^[:alpha:]_]

  the special address 0 can only be used in 0,/RE/ or 0~STEP addresses;
  other cases give an error (you are hindering portability for no reason
  if specifying 0,N and you are giving a dead command if specifying 0

  when a \ is used to escape the character that would terminate an operand
  of the s or y commands, the backslash is removed before the regex is
  compiled.  This is left undefined by POSIX; this behavior makes `s+x\+++g'
  remove occurrences of `x+', consistently with `s/x\///g'.  (However, if
  you enjoy yourself trying `s*x\***g', sed will use the `x*' regex, and you
  won't be able to pass down `x\*' while using * as the delimiter; ideas on
  how to simplify the parser in this respect, and/or gain more coherent
  semantics, are welcome).

Sed 4.1.1:

  preserve permissions of in-place edited files

  yield an error when running -i on terminals or other non regular files

  do not interpret - as stdin when running in in-place editing mode

  fix bug that prevented 's' command modifiers from working

Sed 4.1.2:

  fix bug in 'y' command in multi-byte character sets

  fix severe bug in parsing of ranges with an embedded open bracket

  fix off-by-one error when printing a "bad command" error

To update your installation, click on the "Install Cygwin now" link on
the http://cygwin.com/ web page.  This downloads setup.exe to your
system.  Then, run setup and answer all of the questions.


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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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