Template Version: @(#)sac_nextcase 1.69 02/15/10 SMI
This information is Copyright 2010 Sun Microsystems
1. Introduction
1.1. Project/Component Working Name:
open source sed
1.2. Name of Document Author/Supplier:
Author: Olga Kryzhanovska
1.3 Date of This Document:
10 March, 2010
4. Technical Description
I'm sponsoring this fast-track request on behalf of the
POSIX utility community and shell project.
Please note that this is an *open* case.
The release binding is the same as with the ksh93 project: a
patch/micro release of Solaris delivering through ON
Stability levels are as described below.
This project is an amendment to the Korn Shell 93 Integration project
(PSARC/2006/550 and PSARC/2007/035, PSARC/2008/094, PSARC/2008/344
and PSARC/2008/589) specifying the following additional
interfaces:
Provide an opensource version of /usr/bin/sed and /usr/xpg4/bin/sed
This case proposes to deliver the following features as a set of
independent putbacks as they become available. Each feature is
self contained and independent of the others, so out of order
and partial putbacks at this granularity should have no adverse
impact on the functionality and behavior of the system as a whole.
Bug/RFE Number(s):
6687656 RFE: Provide an opensource version of /usr/bin/sed and /usr/xpg4/bin/sed
Interface Stability Description
--------- --------- -----------
/usr/bin/sed See man page sed command
/usr/xpg4/bin/sed See man page sed command
ksh93 builtin /usr/xpg4/bin/sed See man page sed command
The following options will be supported additionally to the existing
-n, -e, -f options for BSD and GNU compatibility:
-b, --strip-blanks
Strip leading blanks from a, c, and i text.
-e, --expression=script
Append the editing commands in script to the end
of the the editing command script. script may
contain more than one newline separated command.
-f, --file=script-file
Append the editing commands in script-file to the
end of the the editing command script.
-n, --quiet|silent
Suppress the default output in which each line,
after it is examined for editing, is written to
standard output. Only lines explicitly selected
for output will be written.
-A|X, --augmented
Enable augmented regular expressions; this
includes negation and conjunction, i.e. xgrep(1)
style
-E|r, --extended|regexp-extended
Enable extended regular expressions, i.e.,
egrep(1) style.
-O, --lenient Enable lenient regular expression interpretation.
This is the default for /usr/bin/sed
-S, --strict|posix
Enable strict regular expression interpretation.
This is the default for /usr/xpg4/bin/sed
-m multi-digit-reference?Enable \dd multi-digit
backreferences.
-d Ignored by this implementation for BSD
compatibility.
-u, --unbuffered
Unbuffered output.
The interface stability of the new options is described in the
manual page.
Notes
-----
1. Multibyte character support in /usr/bin/sed
Previous implementations of /usr/bin/sed had unspecified behaviour
if multibyte characters are encountered. Part are they handled
as multibyte characters, part are they handled as bytes and part
are they handled as input from outer space (random values).
To fix this situation the new implementation will treat multibyte
characters as characters.
The old behaviour can be emulated by invoking sed with
LC_ALL=C sed <options> <file>. This will treat all input as bytes.
2. Compatibility of old and new /usr/bin/sed implementations:
Modulo correction of the bug as in the NOTES, we believe that this
new version can act as a 100% compatible drop in for the legacy sed
programs.
Future directions
-----------------
A future case will add /usr/bin/sedcomp to provide a sed script
compiler.
Materials:
- Man page for sed.1:
Original: manpage_sed_1_old.txt
New: manpage_sed_1_new.txt
6. Resources and Schedule
6.4. Steering Committee requested information
6.4.1. Consolidation C-team Name:
ON
6.5. ARC review type: FastTrack
6.6. ARC Exposure: open
