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import netbsd sed

Browse source 
. speeds up mkdep (i.e. world builds) significantly
	. have to keep minix /bin/sed for a while because previous
	  usr/etc/rc depends on it
	. force mkdep to use /usr/bin/sed for speedup
This commit is contained in:
Ben Gras 2011-07-20 14:51:58 +02:00
parent 2a2f25bf29
commit f789fee254
17 changed files with 3979 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
commands/mkdep/mkdep.sh
View file

@ -43,7 +43,7 @@ case $# in
echo echo
$cpp "$f" | \ $cpp "$f" | \
sed -e '/^#/!d /usr/bin/sed -e '/^#/!d
s/.*"\(.*\)".*/\1/ s/.*"\(.*\)".*/\1/
s:^\./::' \ s:^\./::' \
-e '/^<built-in>$/d' \ -e '/^<built-in>$/d' \

4
etc/usr/rc
View file

@ -77,7 +77,9 @@ get_eth_labels() {
# Filter out the non-vlan ethernet entries from inet.conf. # Filter out the non-vlan ethernet entries from inet.conf.
# Produce as output a list of "drivername_instancenr"-formatted labels. # Produce as output a list of "drivername_instancenr"-formatted labels.
# The first sed is taken from /bin as older GNU sed versions don't know '\t'. # The first sed is taken from /bin as older GNU sed versions don't know '\t'.
/bin/sed 's/\t/ /g' /etc/inet.conf | \ # /bin/sed is the minix sed, /usr/bin/sed is the netbsd sed. Earlier versions
# of this script used \t that only the minix sed understands.
/bin/sed 's/\008/ /g' /etc/inet.conf | \
sed -n 's/^ *eth[0-9][0-9]* *\([^ ][^ ]*\) *\([0-9][0-9]*\).*$/\1_\2/p' | \ sed -n 's/^ *eth[0-9][0-9]* *\([^ ][^ ]*\) *\([0-9][0-9]*\).*$/\1_\2/p' | \
grep -v '^vlan_' grep -v '^vlan_'
} }

1
tools/nbsd_ports
View file

@ -6,5 +6,6 @@ lib/libterminfo src/lib/libterminfo
nbsd_include src/include nbsd_include src/include
usr.bin/m4 src/usr.bin/m4 usr.bin/m4 src/usr.bin/m4
usr.bin/indent src/usr.bin/indent usr.bin/indent src/usr.bin/indent
usr.bin/sed src/usr.bin/sed
usr.bin/stat src/usr.bin/stat usr.bin/stat src/usr.bin/stat
usr.bin/tic src/usr.bin/tic usr.bin/tic src/usr.bin/tic

4
tools/release.sh
View file

@ -192,10 +192,10 @@ mkdir -p $RELEASEPACKAGE
echo " * Transfering bootstrap dirs to $RELEASEDIR" echo " * Transfering bootstrap dirs to $RELEASEDIR"
cp -p /bin/* /usr/bin/* /sbin/* $RELEASEDIR/$XBIN cp -p /bin/* /usr/bin/* /sbin/* $RELEASEDIR/$XBIN
cp -rp /usr/lib $RELEASEDIR/usr cp -rp /usr/lib $RELEASEDIR/usr
cp -rp /bin/sh /bin/echo /bin/install /bin/rm /bin/sed \ cp -rp /bin/sh /bin/echo /bin/install /bin/rm \
/bin/date $RELEASEDIR/bin /bin/date $RELEASEDIR/bin
cp -rp /usr/bin/make /usr/bin/yacc /usr/bin/lex /usr/bin/asmconv \ cp -rp /usr/bin/make /usr/bin/yacc /usr/bin/lex /usr/bin/asmconv \
/usr/bin/grep /usr/bin/egrep /usr/bin/awk $RELEASEDIR/usr/bin /usr/bin/grep /usr/bin/egrep /usr/bin/awk /usr/bin/sed $RELEASEDIR/usr/bin
CONFIGHEADER=$RELEASEDIR/usr/src/common/include/minix/sys_config.h CONFIGHEADER=$RELEASEDIR/usr/src/common/include/minix/sys_config.h

2
usr.bin/Makefile
View file

@ -3,7 +3,7 @@
.include <bsd.own.mk> .include <bsd.own.mk>
# NetBSD imports # NetBSD imports
SUBDIR= indent m4 mkimage stat tic SUBDIR= indent m4 mkimage stat tic sed
# Non-NetBSD imports # Non-NetBSD imports
SUBDIR+= ministat SUBDIR+= ministat

9
usr.bin/sed/Makefile Normal file
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@ -0,0 +1,9 @@
# $NetBSD: Makefile,v 1.14 2009/04/14 22:15:26 lukem Exp $
# from: @(#)Makefile 8.1 (Berkeley) 6/6/93
.include <bsd.own.mk>
PROG= sed
SRCS= compile.c main.c misc.c process.c
.include <bsd.prog.mk>

199
usr.bin/sed/POSIX Normal file
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@ -0,0 +1,199 @@
# $NetBSD: POSIX,v 1.4 1997/01/09 20:21:25 tls Exp $
# from: @(#)POSIX 8.1 (Berkeley) 6/6/93
Comments on the IEEE P1003.2 Draft 12
Part 2: Shell and Utilities
Section 4.55: sed - Stream editor
Diomidis Spinellis <dds@doc.ic.ac.uk>
Keith Bostic <bostic@cs.berkeley.edu>
In the following paragraphs, "wrong" usually means "inconsistent with
historic practice", as most of the following comments refer to
undocumented inconsistencies between the historical versions of sed and
the POSIX 1003.2 standard. All the comments are notes taken while
implementing a POSIX-compatible version of sed, and should not be
interpreted as official opinions or criticism towards the POSIX committee.
All uses of "POSIX" refer to section 4.55, Draft 12 of POSIX 1003.2.
1. 32V and BSD derived implementations of sed strip the text
arguments of the a, c and i commands of their initial blanks,
i.e.
#!/bin/sed -f
a\
foo\
\ indent\
bar
produces:
foo
indent
bar
POSIX does not specify this behavior as the System V versions of
sed do not do this stripping. The argument against stripping is
that it is difficult to write sed scripts that have leading blanks
if they are stripped. The argument for stripping is that it is
difficult to write readable sed scripts unless indentation is allowed
and ignored, and leading whitespace is obtainable by entering a
backslash in front of it. This implementation follows the BSD
historic practice.
2. Historical versions of sed required that the w flag be the last
flag to an s command as it takes an additional argument. This
is obvious, but not specified in POSIX.
3. Historical versions of sed required that whitespace follow a w
flag to an s command. This is not specified in POSIX. This
implementation permits whitespace but does not require it.
4. Historical versions of sed permitted any number of whitespace
characters to follow the w command. This is not specified in
POSIX. This implementation permits whitespace but does not
require it.
5. The rule for the l command differs from historic practice. Table
2-15 includes the various ANSI C escape sequences, including \\
for backslash. Some historical versions of sed displayed two
digit octal numbers, too, not three as specified by POSIX. POSIX
is a cleanup, and is followed by this implementation.
6. The POSIX specification for ! does not specify that for a single
command the command must not contain an address specification
whereas the command list can contain address specifications. The
specification for ! implies that "3!/hello/p" works, and it never
has, historically. Note,
3!{
/hello/p
}
does work.
7. POSIX does not specify what happens with consecutive ! commands
(e.g. /foo/!!!p). Historic implementations allow any number of
!'s without changing the behaviour. (It seems logical that each
one might reverse the behaviour.) This implementation follows
historic practice.
8. Historic versions of sed permitted commands to be separated
by semi-colons, e.g. 'sed -ne '1p;2p;3q' printed the first
three lines of a file. This is not specified by POSIX.
Note, the ; command separator is not allowed for the commands
a, c, i, w, r, :, b, t, # and at the end of a w flag in the s
command. This implementation follows historic practice and
implements the ; separator.
9. Historic versions of sed terminated the script if EOF was reached
during the execution of the 'n' command, i.e.:
sed -e '
n
i\
hello
' </dev/null
did not produce any output. POSIX does not specify this behavior.
This implementation follows historic practice.
10. Deleted.
11. Historical implementations do not output the change text of a c
command in the case of an address range whose first line number
is greater than the second (e.g. 3,1). POSIX requires that the
text be output. Since the historic behavior doesn't seem to have
any particular purpose, this implementation follows the POSIX
behavior.
12. POSIX does not specify whether address ranges are checked and
reset if a command is not executed due to a jump. The following
program will behave in different ways depending on whether the
'c' command is triggered at the third line, i.e. will the text
be output even though line 3 of the input will never logically
encounter that command.
2,4b
1,3c\
text
Historic implementations, and this implementation, do not output
the text in the above example. The general rule, therefore,
is that a range whose second address is never matched extends to
the end of the input.
13. Historical implementations allow an output suppressing #n at the
beginning of -e arguments as well as in a script file. POSIX
does not specify this. This implementation follows historical
practice.
14. POSIX does not explicitly specify how sed behaves if no script is
specified. Since the sed Synopsis permits this form of the command,
and the language in the Description section states that the input
is output, it seems reasonable that it behave like the cat(1)
command. Historic sed implementations behave differently for "ls |
sed", where they produce no output, and "ls | sed -e#", where they
behave like cat. This implementation behaves like cat in both cases.
15. The POSIX requirement to open all w files at the beginning makes
sed behave nonintuitively when the w commands are preceded by
addresses or are within conditional blocks. This implementation
follows historic practice and POSIX, by default, and provides the
-a option which opens the files only when they are needed.
16. POSIX does not specify how escape sequences other than \n and \D
(where D is the delimiter character) are to be treated. This is
reasonable, however, it also doesn't state that the backslash is
to be discarded from the output regardless. A strict reading of
POSIX would be that "echo xyz | sed s/./\a" would display "\ayz".
As historic sed implementations always discarded the backslash,
this implementation does as well.
17. POSIX specifies that an address can be "empty". This implies
that constructs like ",d" or "1,d" and ",5d" are allowed. This
is not true for historic implementations or this implementation
of sed.
18. The b t and : commands are documented in POSIX to ignore leading
white space, but no mention is made of trailing white space.
Historic implementations of sed assigned different locations to
the labels "x" and "x ". This is not useful, and leads to subtle
programming errors, but it is historic practice and changing it
could theoretically break working scripts. This implementation
follows historic practice.
19. Although POSIX specifies that reading from files that do not exist
from within the script must not terminate the script, it does not
specify what happens if a write command fails. Historic practice
is to fail immediately if the file cannot be opened or written.
This implementation follows historic practice.
20. Historic practice is that the \n construct can be used for either
string1 or string2 of the y command. This is not specified by
POSIX. This implementation follows historic practice.
21. Deleted.
22. Historic implementations of sed ignore the RE delimiter characters
within character classes. This is not specified in POSIX. This
implementation follows historic practice.
23. Historic implementations handle empty RE's in a special way: the
empty RE is interpreted as if it were the last RE encountered,
whether in an address or elsewhere. POSIX does not document this
behavior. For example the command:
sed -e /abc/s//XXX/
substitutes XXX for the pattern abc. The semantics of "the last
RE" can be defined in two different ways:
1. The last RE encountered when compiling (lexical/static scope).
2. The last RE encountered while running (dynamic scope).
While many historical implementations fail on programs depending
on scope differences, the SunOS version exhibited dynamic scope
behaviour. This implementation does dynamic scoping, as this seems
the most useful and in order to remain consistent with historical
practice.

103
usr.bin/sed/TEST/hanoi.sed Normal file
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@ -0,0 +1,103 @@
# Towers of Hanoi in sed.
#
# from: @(#)hanoi.sed 8.1 (Berkeley) 6/6/93
# $NetBSD: hanoi.sed,v 1.3 1997/01/09 20:21:35 tls Exp $
#
#
# Ex:
# Run "sed -f hanoi.sed", and enter:
#
# :abcd: : :<CR><CR>
#
# note -- TWO carriage returns, a peculiarity of sed), this will output the
# sequence of states involved in moving 4 rings, the largest called "a" and
# the smallest called "d", from the first to the second of three towers, so
# that the rings on any tower at any time are in descending order of size.
# You can start with a different arrangement and a different number of rings,
# say :ce:b:ax: and it will give the shortest procedure for moving them all
# to the middle tower. The rules are: the names of the rings must all be
# lower-case letters, they must be input within 3 fields (representing the
# towers) and delimited by 4 colons, such that the letters within each field
# are in alphabetical order (i.e. rings are in descending order of size).
#
# For the benefit of anyone who wants to figure out the script, an "internal"
# line of the form
# b:0abx:1a2b3 :2 :3x2
# has the following meaning: the material after the three markers :1, :2,
# and :3 represents the three towers; in this case the current set-up is
# ":ab : :x :". The numbers after a, b and x in these fields indicate
# that the next time it gets a chance, it will move a to tower 2, move b
# to tower 3, and move x to tower 2. The string after :0 just keeps track
# of the alphabetical order of the names of the rings. The b at the
# beginning means that it is now dealing with ring b (either about to move
# it, or re-evaluating where it should next be moved to).
#
# Although this version is "limited" to 26 rings because of the size of the
# alphabet, one could write a script using the same idea in which the rings
# were represented by arbitrary [strings][within][brackets], and in place of
# the built-in line of the script giving the order of the letters of the
# alphabet, it would accept from the user a line giving the ordering to be
# assumed, e.g. [ucbvax][decvax][hplabs][foo][bar].
#
# George Bergman
# Math, UC Berkeley 94720 USA
# cleaning, diagnostics
s/ *//g
/^$/d
/[^a-z:]/{a\
Illegal characters: use only a-z and ":". Try again.
d
}
/^:[a-z]*:[a-z]*:[a-z]*:$/!{a\
Incorrect format: use\
\ : string1 : string2 : string3 :<CR><CR>\
Try again.
d
}
/\([a-z]\).*\1/{a\
Repeated letters not allowed. Try again.
d
}
# initial formatting
h
s/[a-z]/ /g
G
s/^:\( *\):\( *\):\( *\):\n:\([a-z]*\):\([a-z]*\):\([a-z]*\):$/:1\4\2\3:2\5\1\3:3\6\1\2:0/
s/[a-z]/&2/g
s/^/abcdefghijklmnopqrstuvwxyz/
:a
s/^\(.\).*\1.*/&\1/
s/.//
/^[^:]/ba
s/\([^0]*\)\(:0.*\)/\2\1:/
s/^[^0]*0\(.\)/\1&/
:b
# outputting current state without markers
h
s/.*:1/:/
s/[123]//gp
g
:c
# establishing destinations
/^\(.\).*\1:1/td
/^\(.\).*:1[^:]*\11/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\31/
/^\(.\).*:1[^:]*\12/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\33/
/^\(.\).*:1[^:]*\13/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\32/
/^\(.\).*:2[^:]*\11/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\33/
/^\(.\).*:2[^:]*\12/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\32/
/^\(.\).*:2[^:]*\13/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\31/
/^\(.\).*:3[^:]*\11/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\32/
/^\(.\).*:3[^:]*\12/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\31/
/^\(.\).*:3[^:]*\13/s/^\(.\)\(.*\1\([a-z]\).*\)\3./\3\2\33/
bc
# iterate back to find smallest out-of-place ring
:d
s/^\(.\)\(:0[^:]*\([^:]\)\1.*:\([123]\)[^:]*\1\)\4/\3\2\4/
td
# move said ring (right, resp. left)
s/^\(.\)\(.*\)\1\([23]\)\(.*:\3[^ ]*\) /\1\2 \4\1\3/
s/^\(.\)\(.*:\([12]\)[^ ]*\) \(.*\)\1\3/\1\2\1\3\4 /
tb
s/.*/Done! Try another, or end with ^D./p
d

164
usr.bin/sed/TEST/math.sed Normal file
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@ -0,0 +1,164 @@
#
# from: @(#)math.sed 8.1 (Berkeley) 6/6/93
# $NetBSD: math.sed,v 1.3 1997/01/09 20:21:36 tls Exp $
#
# Addition and multiplication in sed.
# ++ for a limited time only do (expr) too!!!
#
# Kevin S Braunsdorf, PUCC UNIX Group, ksb@cc.purdue.edu.
#
# Ex:
# echo "4+7*3" | sed -f %f
# make sure the expression is well formed
s/[ ]//g
/[+*\/-]$/{
a\
poorly formed expression, operator on the end
q
}
/^[+*\/]/{
a\
poorly formed expression, leading operator
q
}
# fill hold space with done token
x
s/^.*/done/
x
# main loop, process operators (*, + and () )
: loop
/^\+/{
s///
b loop
}
/^\(.*\)(\([^)]*\))\(.*\)$/{
H
s//\2/
x
s/^\(.*\)\n\(.*\)(\([^()]*\))\(.*\)$/()\2@\4@\1/
x
b loop
}
/^[0-9]*\*/b mul
/^\([0-9]*\)\+\([0-9+*]*\*[0-9]*\)$/{
s//\2+\1/
b loop
}
/^[0-9]*\+/{
s/$/=/
b add
}
x
/^done$/{
x
p
d
}
/^()/{
s///
x
G
s/\(.*\)\n\([^@]*\)@\([^@]*\)@\(.*\)/\2\1\3/
x
s/[^@]*@[^@]*@\(.*\)/\1/
x
b loop
}
i\
help, stack problem
p
x
p
q
# turn mul into add until 1*x -> x
: mul
/^0*1\*/{
s///
b loop
}
/^\([0-9]*\)0\*/{
s/^\([0-9]*\)0\*\([0-9]*\)/\1*\20/
b mul
}
s/^\([0-9]*\)1\*/\10*/
s/^\([0-9]*\)2\*/\11*/
s/^\([0-9]*\)3\*/\12*/
s/^\([0-9]*\)4\*/\13*/
s/^\([0-9]*\)5\*/\14*/
s/^\([0-9]*\)6\*/\15*/
s/^\([0-9]*\)7\*/\16*/
s/^\([0-9]*\)8\*/\17*/
s/^\([0-9]*\)9\*/\18*/
s/\*\([0-9*]*\)/*\1+\1/
b mul
# get rid of a plus term until 0+x -> x
: add
/^\+\([0-9+*]*\)=/{
s//\1/
b loop
}
/^\([0-9*]*\)\+=/{
s//\1/
b loop
}
/^\([0-9]*\)\+\([0-9*+]*\)\+=/{
s//\2+\1/
b loop
}
/^\([0-9]*\)0\+\([0-9]*\)\([0-9]\)=/{
s//\1+\2=\3/
b add
}
/^\([0-9]*\)\([0-9]\)\+\([0-9]*\)0=/{
s//\1+\3=\2/
b add
}
/^\([0-9]*\)0\+\([0-9*+]*\)\+\([0-9]*\)\([0-9]\)=/{
s//\1+\2+\3=\4/
b add
}
/^\([0-9]*\)\([0-9]\)\+\([0-9*+]*\)\+\([0-9]*\)0=/{
s//\1+\3+\4=\2/
b add
}
s/^\([0-9]*\)1\+/\10+/
s/^\([0-9]*\)2\+/\11+/
s/^\([0-9]*\)3\+/\12+/
s/^\([0-9]*\)4\+/\13+/
s/^\([0-9]*\)5\+/\14+/
s/^\([0-9]*\)6\+/\15+/
s/^\([0-9]*\)7\+/\16+/
s/^\([0-9]*\)8\+/\17+/
s/^\([0-9]*\)9\+/\18+/
s/9=\([0-9]*\)$/_=\1/
s/8=\([0-9]*\)$/9=\1/
s/7=\([0-9]*\)$/8=\1/
s/6=\([0-9]*\)$/7=\1/
s/5=\([0-9]*\)$/6=\1/
s/4=\([0-9]*\)$/5=\1/
s/3=\([0-9]*\)$/4=\1/
s/2=\([0-9]*\)$/3=\1/
s/1=\([0-9]*\)$/2=\1/
/_/{
s//_0/
: inc
s/9_/_0/
s/8_/9/
s/7_/8/
s/6_/7/
s/5_/6/
s/4_/5/
s/3_/4/
s/2_/3/
s/1_/2/
s/0_/1/
s/\+_/+1/
/_/b inc
}
b add

554
usr.bin/sed/TEST/sed.test Normal file
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@ -0,0 +1,554 @@
#!/bin/sh -
# $NetBSD: sed.test,v 1.4 2003/10/27 20:09:49 uwe Exp $
#
# Copyright (c) 1992 Diomidis Spinellis.
# Copyright (c) 1992, 1993
# The Regents of the University of California. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the University of
# California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# from: @(#)sed.test 8.1 (Berkeley) 6/6/93
# $NetBSD: sed.test,v 1.4 2003/10/27 20:09:49 uwe Exp $
#
# sed Regression Tests
#
# The following files are created:
# lines[1-4], script1, script2
# Two directories *.out contain the test results
main()
{
BASE=/usr/old/bin/sed
BASELOG=sed.out
TEST=../obj/sed
TESTLOG=nsed.out
DICT=/usr/share/dict/words
test_error | more
awk 'END { for (i = 1; i < 15; i++) print "l1_" i}' </dev/null >lines1
awk 'END { for (i = 1; i < 10; i++) print "l2_" i}' </dev/null >lines2
exec 4>&1 5>&2
# Set these flags to get messages about known problems
BSD=1
GNU=0
SUN=0
tests $BASE $BASELOG
BSD=0
GNU=0
SUN=0
tests $TEST $TESTLOG
exec 1>&4 2>&5
diff -c $BASELOG $TESTLOG | more
}
tests()
{
SED=$1
DIR=$2
rm -rf $DIR
mkdir $DIR
MARK=100
test_args
test_addr
echo Testing commands
test_group
test_acid
test_branch
test_pattern
test_print
test_subst
}
mark()
{
MARK=`expr $MARK + 1`
exec 1>&4 2>&5
exec >"$DIR/${MARK}_$1"
echo "Test $1:$MARK"
# Uncomment this line to match tests with sed error messages
echo "Test $1:$MARK" >&5
}
test_args()
{
mark '1.1'
echo Testing argument parsing
echo First type
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED 's/^/e1_/p' lines1
fi
mark '1.2' ; $SED -n 's/^/e1_/p' lines1
mark '1.3'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED 's/^/e1_/p' <lines1
fi
mark '1.4' ; $SED -n 's/^/e1_/p' <lines1
echo Second type
mark '1.4.1'
if [ $SUN -eq 1 ] ; then
echo SunOS sed fails this
fi
$SED -e '' <lines1
echo 's/^/s1_/p' >script1
echo 's/^/s2_/p' >script2
mark '1.5'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -f script1 lines1
fi
mark '1.6'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -f script1 <lines1
fi
mark '1.7'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -e 's/^/e1_/p' lines1
fi
mark '1.8'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -e 's/^/e1_/p' <lines1
fi
mark '1.9' ; $SED -n -f script1 lines1
mark '1.10' ; $SED -n -f script1 <lines1
mark '1.11' ; $SED -n -e 's/^/e1_/p' lines1
mark '1.12'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -n -e 's/^/e1_/p' <lines1
fi
mark '1.13'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -e 's/^/e1_/p' -e 's/^/e2_/p' lines1
fi
mark '1.14'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -f script1 -f script2 lines1
fi
mark '1.15'
if [ $GNU -eq 1 -o $SUN -eq 1 ] ; then
echo GNU and SunOS sed fail this following older POSIX draft
else
$SED -e 's/^/e1_/p' -f script1 lines1
fi
mark '1.16'
if [ $SUN -eq 1 ] ; then
echo SunOS sed prints only with -n
else
$SED -e 's/^/e1_/p' lines1 lines1
fi
# POSIX D11.2:11251
mark '1.17' ; $SED p <lines1 lines1
cat >script1 <<EOF
#n
# A comment
p
EOF
mark '1.18' ; $SED -f script1 <lines1 lines1
}
test_addr()
{
echo Testing address ranges
mark '2.1' ; $SED -n -e '4p' lines1
mark '2.2' ; $SED -n -e '20p' lines1 lines2
mark '2.3' ; $SED -n -e '$p' lines1
mark '2.4' ; $SED -n -e '$p' lines1 lines2
mark '2.5' ; $SED -n -e '$a\
hello' /dev/null
mark '2.6' ; $SED -n -e '$p' lines1 /dev/null lines2
# Should not print anything
mark '2.7' ; $SED -n -e '20p' lines1
mark '2.8' ; $SED -n -e '0p' lines1
mark '2.9' ; $SED -n '/l1_7/p' lines1
mark '2.10' ; $SED -n ' /l1_7/ p' lines1
mark '2.11'
if [ $BSD -eq 1 ] ; then
echo BSD sed fails this test
fi
if [ $GNU -eq 1 ] ; then
echo GNU sed fails this
fi
$SED -n '\_l1\_7_p' lines1
mark '2.12' ; $SED -n '1,4p' lines1
mark '2.13' ; $SED -n '1,$p' lines1 lines2
mark '2.14' ; $SED -n '1,/l2_9/p' lines1 lines2
mark '2.15' ; $SED -n '/4/,$p' lines1 lines2
mark '2.16' ; $SED -n '/4/,20p' lines1 lines2
mark '2.17' ; $SED -n '/4/,/10/p' lines1 lines2
mark '2.18' ; $SED -n '/l2_3/,/l1_8/p' lines1 lines2
mark '2.19'
if [ $GNU -eq 1 ] ; then
echo GNU sed fails this
fi
$SED -n '12,3p' lines1 lines2
mark '2.20'
if [ $GNU -eq 1 ] ; then
echo GNU sed fails this
fi
$SED -n '/l1_7/,3p' lines1 lines2
}
test_group()
{
echo Brace and other grouping
mark '3.1' ; $SED -e '
4,12 {
s/^/^/
s/$/$/
s/_/T/
}' lines1
mark '3.2' ; $SED -e '
4,12 {
s/^/^/
/6/,/10/ {
s/$/$/
/8/ s/_/T/
}
}' lines1
mark '3.3' ; $SED -e '
4,12 !{
s/^/^/
/6/,/10/ !{
s/$/$/
/8/ !s/_/T/
}
}' lines1
mark '3.4' ; $SED -e '4,12!s/^/^/' lines1
}
test_acid()
{
echo Testing a c d and i commands
mark '4.1' ; $SED -n -e '
s/^/before_i/p
20i\
inserted
s/^/after_i/p
' lines1 lines2
mark '4.2' ; $SED -n -e '
5,12s/^/5-12/
s/^/before_a/p
/5-12/a\
appended
s/^/after_a/p
' lines1 lines2
mark '4.3'
if [ $GNU -eq 1 ] ; then
echo GNU sed fails this
fi
$SED -n -e '
s/^/^/p
/l1_/a\
appended
8,10N
s/$/$/p
' lines1 lines2
mark '4.4' ; $SED -n -e '
c\
hello
' lines1
mark '4.5' ; $SED -n -e '
8c\
hello
' lines1
mark '4.6' ; $SED -n -e '
3,14c\
hello
' lines1
# SunOS and GNU sed behave differently. We follow POSIX
# mark '4.7' ; $SED -n -e '
#8,3c\
#hello
#' lines1
mark '4.8' ; $SED d <lines1
}
test_branch()
{
echo Testing labels and branching
mark '5.1' ; $SED -n -e '
b label4
:label3
s/^/label3_/p
b end
:label4
2,12b label1
b label2
:label1
s/^/label1_/p
b
:label2
s/^/label2_/p
b label3
:end
' lines1
mark '5.2'
if [ $BSD -eq 1 ] ; then
echo BSD sed fails this test
fi
$SED -n -e '
s/l1_/l2_/
t ok
b
:ok
s/^/tested /p
' lines1 lines2
# SunOS sed behaves differently here. Clarification needed.
# mark '5.3' ; $SED -n -e '
#5,8b inside
#1,5 {
# s/^/^/p
# :inside
# s/$/$/p
#}
#' lines1
# Check that t clears the substitution done flag
mark '5.4' ; $SED -n -e '
1,8s/^/^/
t l1
:l1
t l2
s/$/$/p
b
:l2
s/^/ERROR/
' lines1
# Check that reading a line clears the substitution done flag
mark '5.5'
if [ $BSD -eq 1 ] ; then
echo BSD sed fails this test
fi
$SED -n -e '
t l2
1,8s/^/^/p
2,7N
b
:l2
s/^/ERROR/p
' lines1
mark '5.6' ; $SED 5q lines1
mark '5.7' ; $SED -e '
5i\
hello
5q' lines1
# Branch across block boundary
mark '5.8' ; $SED -e '
{
:b
}
s/l/m/
tb' lines1
}
test_pattern()
{
echo Pattern space commands
# Check that the pattern space is deleted
mark '6.1' ; $SED -n -e '
c\
changed
p
' lines1
mark '6.2' ; $SED -n -e '
4d
p
' lines1
# SunOS sed refused to print here
# mark '6.3' ; $SED -e '
#N
#N
#N
#D
#P
#4p
#' lines1
mark '6.4' ; $SED -e '
2h
3H
4g
5G
6x
6p
6x
6p
' lines1
mark '6.5' ; $SED -e '4n' lines1
mark '6.6' ; $SED -n -e '4n' lines1
}
test_print()
{
echo Testing print and file routines
awk 'END {for (i = 1; i < 256; i++) printf("%c", i);print "\n"}' \
</dev/null >lines3
# GNU and SunOS sed behave differently here
mark '7.1'
if [ $BSD -eq 1 ] ; then
echo 'BSD sed drops core on this one; TEST SKIPPED'
else
$SED -n l lines3
fi
mark '7.2' ; $SED -e '/l2_/=' lines1 lines2
rm -f lines4
mark '7.3' ; $SED -e '3,12w lines4' lines1
echo w results
cat lines4
mark '7.4' ; $SED -e '4r lines2' lines1
mark '7.5' ; $SED -e '5r /dev/dds' lines1
mark '7.6' ; $SED -e '6r /dev/null' lines1
mark '7.7'
if [ $BSD -eq 1 -o $GNU -eq 1 -o $SUN -eq 1 ] ; then
echo BSD, GNU and SunOS cannot pass this one
else
sed '200q' $DICT | sed 's$.*$s/^/&/w tmpdir/&$' >script1
rm -rf tmpdir
mkdir tmpdir
$SED -f script1 lines1
cat tmpdir/*
rm -rf tmpdir
fi
mark '7.8'
if [ $BSD -eq 1 ] ; then
echo BSD sed cannot pass 7.7
else
echo line1 > lines3
echo "" >> lines3
$SED -n -e '$p' lines3 /dev/null
fi
}
test_subst()
{
echo Testing substitution commands
mark '8.1' ; $SED -e 's/./X/g' lines1
mark '8.2' ; $SED -e 's,.,X,g' lines1
# GNU and SunOS sed thinks we are escaping . as wildcard, not as separator
# mark '8.3' ; $SED -e 's.\..X.g' lines1
# POSIX does not say that this should work
# mark '8.4' ; $SED -e 's/[/]/Q/' lines1
mark '8.4' ; $SED -e 's/[\/]/Q/' lines1
mark '8.5' ; $SED -e 's_\__X_' lines1
mark '8.6' ; $SED -e 's/./(&)/g' lines1
mark '8.7' ; $SED -e 's/./(\&)/g' lines1
mark '8.8' ; $SED -e 's/\(.\)\(.\)\(.\)/x\3x\2x\1/g' lines1
mark '8.9' ; $SED -e 's/_/u0\
u1\
u2/g' lines1
mark '8.10'
if [ $BSD -eq 1 -o $GNU -eq 1 ] ; then
echo 'BSD/GNU sed do not understand digit flags on s commands'
fi
$SED -e 's/./X/4' lines1
rm -f lines4
mark '8.11' ; $SED -e 's/1/X/w lines4' lines1
echo s wfile results
cat lines4
mark '8.12' ; $SED -e 's/[123]/X/g' lines1
mark '8.13' ; $SED -e 'y/0123456789/9876543210/' lines1
mark '8.14' ;
if [ $BSD -eq 1 -o $GNU -eq 1 -o $SUN -eq 1 ] ; then
echo BSD/GNU/SUN sed fail this test
else
$SED -e 'y10\123456789198765432\101' lines1
fi
mark '8.15' ; $SED -e '1N;2y/\n/X/' lines1
mark '8.16'
if [ $BSD -eq 1 ] ; then
echo 'BSD sed does not handle branch defined REs'
else
echo 'eeefff' | $SED -e 'p' -e 's/e/X/p' -e ':x' \
-e 's//Y/p' -e '/f/bx'
fi
}
test_error()
{
exec 3<&0 4>&1 5>&2
exec 0</dev/null
exec 2>&1
set -x
$TEST -x && exit 1
$TEST -f && exit 1
$TEST -e && exit 1
$TEST -f /dev/dds && exit 1
$TEST p /dev/dds && exit 1
$TEST -f /bin/sh && exit 1
$TEST '{' && exit 1
$TEST '{' && exit 1
$TEST '/hello/' && exit 1
$TEST '1,/hello/' && exit 1
$TEST -e '-5p' && exit 1
$TEST '/jj' && exit 1
$TEST 'a hello' && exit 1
$TEST 'a \ hello' && exit 1
$TEST 'b foo' && exit 1
$TEST 'd hello' && exit 1
$TEST 's/aa' && exit 1
$TEST 's/aa/' && exit 1
$TEST 's/a/b' && exit 1
$TEST 's/a/b/c/d' && exit 1
$TEST 's/a/b/ 1 2' && exit 1
$TEST 's/a/b/ 1 g' && exit 1
$TEST 's/a/b/w' && exit 1
$TEST 'y/aa' && exit 1
$TEST 'y/aa/b/' && exit 1
$TEST 'y/aa/' && exit 1
$TEST 'y/a/b' && exit 1
$TEST 'y/a/b/c/d' && exit 1
$TEST '!' && exit 1
$TEST supercalifrangolisticexprialidociussupercalifrangolisticexcius
set +x
exec 0<&3 1>&4 2>&5
}
main

877
usr.bin/sed/compile.c Normal file
View file

@ -0,0 +1,877 @@
/* $NetBSD: compile.c,v 1.37 2010/02/19 16:35:27 tnn Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)compile.c 8.2 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: compile.c,v 1.37 2010/02/19 16:35:27 tnn Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "defs.h"
#include "extern.h"
#ifndef _POSIX2_LINE_MAX
#define _POSIX2_LINE_MAX (2 * BUFSIZ)
#endif
#define LHSZ 128
#define LHMASK (LHSZ - 1)
static struct labhash {
struct labhash *lh_next;
u_int lh_hash;
struct s_command *lh_cmd;
int lh_ref;
} *labels[LHSZ];
static char *compile_addr(char *, struct s_addr *);
static char *compile_ccl(char **, char *);
static char *compile_delimited(char *, char *);
static char *compile_flags(char *, struct s_subst *);
static char *compile_re(char *, regex_t **);
static char *compile_subst(char *, struct s_subst *);
static char *compile_text(void);
static char *compile_tr(char *, char **);
static struct s_command
**compile_stream(struct s_command **);
static char *duptoeol(char *, const char *);
static void enterlabel(struct s_command *);
static struct s_command
*findlabel(char *);
static void fixuplabel(struct s_command *, struct s_command *);
static void uselabel(void);
/*
* Command specification. This is used to drive the command parser.
*/
struct s_format {
char code; /* Command code */
int naddr; /* Number of address args */
enum e_args args; /* Argument type */
};
static struct s_format cmd_fmts[] = {
{'{', 2, GROUP},
{'}', 0, ENDGROUP},
{'a', 1, TEXT},
{'b', 2, BRANCH},
{'c', 2, TEXT},
{'d', 2, EMPTY},
{'D', 2, EMPTY},
{'g', 2, EMPTY},
{'G', 2, EMPTY},
{'h', 2, EMPTY},
{'H', 2, EMPTY},
{'i', 1, TEXT},
{'l', 2, EMPTY},
{'n', 2, EMPTY},
{'N', 2, EMPTY},
{'p', 2, EMPTY},
{'P', 2, EMPTY},
{'q', 1, EMPTY},
{'r', 1, RFILE},
{'s', 2, SUBST},
{'t', 2, BRANCH},
{'w', 2, WFILE},
{'x', 2, EMPTY},
{'y', 2, TR},
{'!', 2, NONSEL},
{':', 0, LABEL},
{'#', 0, COMMENT},
{'=', 1, EMPTY},
{'\0', 0, COMMENT},
};
/* The compiled program. */
struct s_command *prog;
/*
* Compile the program into prog.
* Initialise appends.
*/
void
compile(void)
{
*compile_stream(&prog) = NULL;
fixuplabel(prog, NULL);
uselabel();
if (appendnum > 0)
appends = xmalloc(sizeof(struct s_appends) * appendnum);
match = xmalloc((maxnsub + 1) * sizeof(regmatch_t));
}
#define EATSPACE() \
while (*p && isascii((unsigned char)*p) && \
isspace((unsigned char)*p)) \
p++ \
static struct s_command **
compile_stream(struct s_command **link)
{
char *p;
static char *lbuf; /* To avoid excessive malloc calls */
static size_t bufsize;
struct s_command *cmd, *cmd2, *stack;
struct s_format *fp;
int naddr; /* Number of addresses */
stack = 0;
for (;;) {
if ((p = cu_fgets(&lbuf, &bufsize)) == NULL) {
if (stack != 0)
err(COMPILE, "unexpected EOF (pending }'s)");
return (link);
}
semicolon: EATSPACE();
if (*p == '#' || *p == '\0')
continue;
else if (*p == ';') {
p++;
goto semicolon;
}
*link = cmd = xmalloc(sizeof(struct s_command));
link = &cmd->next;
cmd->nonsel = cmd->inrange = 0;
/* First parse the addresses */
naddr = 0;
/* Valid characters to start an address */
#define addrchar(c) (strchr("0123456789/\\$", (c)))
if (addrchar(*p)) {
naddr++;
cmd->a1 = xmalloc(sizeof(struct s_addr));
p = compile_addr(p, cmd->a1);
EATSPACE(); /* EXTENSION */
if (*p == ',') {
p++;
EATSPACE(); /* EXTENSION */
naddr++;
cmd->a2 = xmalloc(sizeof(struct s_addr));
p = compile_addr(p, cmd->a2);
EATSPACE();
} else
cmd->a2 = 0;
} else
cmd->a1 = cmd->a2 = 0;
nonsel: /* Now parse the command */
if (!*p)
err(COMPILE, "command expected");
cmd->code = *p;
for (fp = cmd_fmts; fp->code; fp++)
if (fp->code == *p)
break;
if (!fp->code)
err(COMPILE, "invalid command code %c", *p);
if (naddr > fp->naddr)
err(COMPILE,
"command %c expects up to %d address(es), found %d", *p, fp->naddr, naddr);
switch (fp->args) {
case NONSEL: /* ! */
p++;
EATSPACE();
cmd->nonsel = ! cmd->nonsel;
goto nonsel;
case GROUP: /* { */
p++;
EATSPACE();
cmd->next = stack;
stack = cmd;
link = &cmd->u.c;
if (*p)
goto semicolon;
break;
case ENDGROUP:
/*
* Short-circuit command processing, since end of
* group is really just a noop.
*/
cmd->nonsel = 1;
if (stack == 0)
err(COMPILE, "unexpected }");
cmd2 = stack;
stack = cmd2->next;
cmd2->next = cmd;
/*FALLTHROUGH*/
case EMPTY: /* d D g G h H l n N p P q x = \0 */
p++;
EATSPACE();
if (*p == ';') {
p++;
link = &cmd->next;
goto semicolon;
}
if (*p)
err(COMPILE,
"extra characters at the end of %c command", cmd->code);
break;
case TEXT: /* a c i */
p++;
EATSPACE();
if (*p != '\\')
err(COMPILE,
"command %c expects \\ followed by text", cmd->code);
p++;
EATSPACE();
if (*p)
err(COMPILE,
"extra characters after \\ at the end of %c command", cmd->code);
cmd->t = compile_text();
break;
case COMMENT: /* \0 # */
break;
case WFILE: /* w */
p++;
EATSPACE();
if (*p == '\0')
err(COMPILE, "filename expected");
cmd->t = duptoeol(p, "w command");
if (aflag)
cmd->u.fd = -1;
else if ((cmd->u.fd = open(p,
O_WRONLY|O_APPEND|O_CREAT|O_TRUNC,
DEFFILEMODE)) == -1)
err(FATAL, "%s: %s", p, strerror(errno));
break;
case RFILE: /* r */
p++;
EATSPACE();
if (*p == '\0')
err(COMPILE, "filename expected");
else
cmd->t = duptoeol(p, "read command");
break;
case BRANCH: /* b t */
p++;
EATSPACE();
if (*p == '\0')
cmd->t = NULL;
else
cmd->t = duptoeol(p, "branch");
break;
case LABEL: /* : */
p++;
EATSPACE();
cmd->t = duptoeol(p, "label");
if (strlen(p) == 0)
err(COMPILE, "empty label");
enterlabel(cmd);
break;
case SUBST: /* s */
p++;
if (*p == '\0' || *p == '\\')
err(COMPILE,
"substitute pattern can not be delimited by newline or backslash");
cmd->u.s = xmalloc(sizeof(struct s_subst));
p = compile_re(p, &cmd->u.s->re);
if (p == NULL)
err(COMPILE, "unterminated substitute pattern");
--p;
p = compile_subst(p, cmd->u.s);
p = compile_flags(p, cmd->u.s);
EATSPACE();
if (*p == ';') {
p++;
link = &cmd->next;
goto semicolon;
}
break;
case TR: /* y */
p++;
p = compile_tr(p, (char **)(void *)&cmd->u.y);
EATSPACE();
if (*p == ';') {
p++;
link = &cmd->next;
goto semicolon;
}
if (*p)
err(COMPILE,
"extra text at the end of a transform command");
break;
}
}
}
/*
* Get a delimited string. P points to the delimiter of the string; d points
* to a buffer area. Newline and delimiter escapes are processed; other
* escapes are ignored.
*
* Returns a pointer to the first character after the final delimiter or NULL
* in the case of a non-terminated string. The character array d is filled
* with the processed string.
*/
static char *
compile_delimited(char *p, char *d)
{
char c;
c = *p++;
if (c == '\0')
return (NULL);
else if (c == '\\')
err(COMPILE, "\\ can not be used as a string delimiter");
else if (c == '\n')
err(COMPILE, "newline can not be used as a string delimiter");
while (*p) {
if (*p == '[') {
if ((d = compile_ccl(&p, d)) == NULL)
err(COMPILE, "unbalanced brackets ([])");
continue;
} else if (*p == '\\' && p[1] == '[') {
*d++ = *p++;
} else if (*p == '\\' && p[1] == c)
p++;
else if (*p == '\\' && p[1] == 'n') {
*d++ = '\n';
p += 2;
continue;
} else if (*p == '\\' && p[1] == '\\')
*d++ = *p++;
else if (*p == c) {
*d = '\0';
return (p + 1);
}
*d++ = *p++;
}
return (NULL);
}
/* compile_ccl: expand a POSIX character class */
static char *
compile_ccl(char **sp, char *t)
{
int c, d;
char *s = *sp;
*t++ = *s++;
if (*s == '^')
*t++ = *s++;
if (*s == ']')
*t++ = *s++;
for (; *s && (*t = *s) != ']'; s++, t++)
if (*s == '[' && ((d = *(s+1)) == '.' || d == ':' || d == '=')) {
*++t = *++s, t++, s++;
for (c = *s; (*t = *s) != ']' || c != d; s++, t++)
if ((c = *s) == '\0')
return NULL;
} else if (*s == '\\' && s[1] == 'n')
*t = '\n', s++;
return (*s == ']') ? *sp = ++s, ++t : NULL;
}
/*
* Get a regular expression. P points to the delimiter of the regular
* expression; repp points to the address of a regexp pointer. Newline
* and delimiter escapes are processed; other escapes are ignored.
* Returns a pointer to the first character after the final delimiter
* or NULL in the case of a non terminated regular expression. The regexp
* pointer is set to the compiled regular expression.
* Cflags are passed to regcomp.
*/
static char *
compile_re(char *p, regex_t **repp)
{
int eval;
char *re;
re = xmalloc(strlen(p) + 1); /* strlen(re) <= strlen(p) */
p = compile_delimited(p, re);
if (p && strlen(re) == 0) {
*repp = NULL;
free(re);
return (p);
}
*repp = xmalloc(sizeof(regex_t));
if (p && (eval = regcomp(*repp, re, ere)) != 0)
err(COMPILE, "RE error: %s", strregerror(eval, *repp));
if (maxnsub < (*repp)->re_nsub)
maxnsub = (*repp)->re_nsub;
return (p);
}
/*
* Compile the substitution string of a regular expression and set res to
* point to a saved copy of it. Nsub is the number of parenthesized regular
* expressions.
*/
static char *
compile_subst(char *p, struct s_subst *s)
{
static char *lbuf;
static size_t bufsize;
int asize, ref, size, len;
char c, *text, *op, *sp;
int sawesc = 0;
c = *p++; /* Terminator character */
if (c == '\0')
return (NULL);
s->maxbref = 0;
s->linenum = linenum;
text = NULL;
asize = size = 0;
do {
len = ROUNDLEN(strlen(p) + 1);
if (asize - size < len) {
do {
asize += len;
} while (asize - size < len);
text = xrealloc(text, asize);
}
op = sp = text + size;
for (; *p; p++) {
if (*p == '\\' || sawesc) {
/*
* If this is a continuation from the last
* buffer, we won't have a character to
* skip over.
*/
if (sawesc)
sawesc = 0;
else
p++;
if (*p == '\0') {
/*
* This escaped character is continued
* in the next part of the line. Note
* this fact, then cause the loop to
* exit w/ normal EOL case and reenter
* above with the new buffer.
*/
sawesc = 1;
p--;
continue;
} else if (strchr("123456789", *p) != NULL) {
*sp++ = '\\';
ref = *p - '0';
if (s->re != NULL &&
(size_t)ref > s->re->re_nsub)
err(COMPILE,
"\\%c not defined in the RE", *p);
if (s->maxbref < ref)
s->maxbref = ref;
} else if (*p == '&' || *p == '\\')
*sp++ = '\\';
} else if (*p == c) {
p++;
*sp++ = '\0';
size += sp - op;
s->new = xrealloc(text, size);
return (p);
} else if (*p == '\n') {
err(COMPILE,
"unescaped newline inside substitute pattern");
/* NOTREACHED */
}
*sp++ = *p;
}
size += sp - op;
} while ((p = cu_fgets(&lbuf, &bufsize)));
err(COMPILE, "unterminated substitute in regular expression");
/* NOTREACHED */
return (NULL);
}
/*
* Compile the flags of the s command
*/
static char *
compile_flags(char *p, struct s_subst *s)
{
int gn; /* True if we have seen g or n */
char wfile[PATH_MAX], *q;
s->n = 1; /* Default */
s->p = 0;
s->wfile = NULL;
s->wfd = -1;
for (gn = 0;;) {
EATSPACE(); /* EXTENSION */
switch (*p) {
case 'g':
if (gn)
err(COMPILE,
"more than one number or 'g' in substitute flags");
gn = 1;
s->n = 0;
break;
case '\0':
case '\n':
case ';':
return (p);
case 'p':
s->p = 1;
break;
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
if (gn)
err(COMPILE,
"more than one number or 'g' in substitute flags");
gn = 1;
/* XXX Check for overflow */
s->n = (int)strtol(p, &p, 10);
p--;
break;
case 'w':
p++;
#ifdef HISTORIC_PRACTICE
if (*p != ' ') {
err(WARNING, "space missing before w wfile");
return (p);
}
#endif
EATSPACE();
q = wfile;
while (*p) {
if (*p == '\n')
break;
*q++ = *p++;
}
*q = '\0';
if (q == wfile)
err(COMPILE, "no wfile specified");
s->wfile = strdup(wfile);
if (!aflag && (s->wfd = open(wfile,
O_WRONLY|O_APPEND|O_CREAT|O_TRUNC,
DEFFILEMODE)) == -1)
err(FATAL, "%s: %s", wfile, strerror(errno));
return (p);
default:
err(COMPILE,
"bad flag in substitute command: '%c'", *p);
break;
}
p++;
}
}
/*
* Compile a translation set of strings into a lookup table.
*/
static char *
compile_tr(char *p, char **transtab)
{
int i;
char *lt, *op, *np;
char *old = NULL, *new = NULL;
if (*p == '\0' || *p == '\\')
err(COMPILE,
"transform pattern can not be delimited by newline or backslash");
old = xmalloc(strlen(p) + 1);
p = compile_delimited(p, old);
if (p == NULL) {
err(COMPILE, "unterminated transform source string");
goto bad;
}
new = xmalloc(strlen(p) + 1);
p = compile_delimited(--p, new);
if (p == NULL) {
err(COMPILE, "unterminated transform target string");
goto bad;
}
EATSPACE();
if (strlen(new) != strlen(old)) {
err(COMPILE, "transform strings are not the same length");
goto bad;
}
/* We assume characters are 8 bits */
lt = xmalloc(UCHAR_MAX+1);
for (i = 0; i <= UCHAR_MAX; i++)
lt[i] = (char)i;
for (op = old, np = new; *op; op++, np++)
lt[(u_char)*op] = *np;
*transtab = lt;
free(old);
free(new);
return (p);
bad:
free(old);
free(new);
return (NULL);
}
/*
* Compile the text following an a, c, or i command.
*/
static char *
compile_text(void)
{
int asize, size, len;
char *lbuf, *text, *p, *op, *s;
size_t bufsize;
lbuf = text = NULL;
asize = size = 0;
while ((p = cu_fgets(&lbuf, &bufsize))) {
len = ROUNDLEN(strlen(p) + 1);
if (asize - size < len) {
do {
asize += len;
} while (asize - size < len);
text = xrealloc(text, asize);
}
op = s = text + size;
for (; *p; p++) {
if (*p == '\\')
p++;
*s++ = *p;
}
size += s - op;
if (p[-2] != '\\') {
*s = '\0';
break;
}
}
free(lbuf);
return (xrealloc(text, size + 1));
}
/*
* Get an address and return a pointer to the first character after
* it. Fill the structure pointed to according to the address.
*/
static char *
compile_addr(char *p, struct s_addr *a)
{
char *end;
switch (*p) {
case '\\': /* Context address */
++p;
/* FALLTHROUGH */
case '/': /* Context address */
p = compile_re(p, &a->u.r);
if (p == NULL)
err(COMPILE, "unterminated regular expression");
a->type = AT_RE;
return (p);
case '$': /* Last line */
a->type = AT_LAST;
return (p + 1);
/* Line number */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
a->type = AT_LINE;
a->u.l = strtol(p, &end, 10);
return (end);
default:
err(COMPILE, "expected context address");
return (NULL);
}
}
/*
* duptoeol --
* Return a copy of all the characters up to \n or \0.
*/
static char *
duptoeol(char *s, const char *ctype)
{
size_t len;
int ws;
char *start;
ws = 0;
for (start = s; *s != '\0' && *s != '\n'; ++s)
ws = isspace((unsigned char)*s);
*s = '\0';
if (ws)
err(WARNING, "whitespace after %s", ctype);
len = s - start + 1;
return (memmove(xmalloc(len), start, len));
}
/*
* Convert goto label names to addresses, and count a and r commands, in
* the given subset of the script. Free the memory used by labels in b
* and t commands (but not by :).
*
* TODO: Remove } nodes
*/
static void
fixuplabel(struct s_command *cp, struct s_command *end)
{
for (; cp != end; cp = cp->next)
switch (cp->code) {
case 'a':
case 'r':
appendnum++;
break;
case 'b':
case 't':
/* Resolve branch target. */
if (cp->t == NULL) {
cp->u.c = NULL;
break;
}
if ((cp->u.c = findlabel(cp->t)) == NULL)
err(COMPILE2, "undefined label '%s'", cp->t);
free(cp->t);
break;
case '{':
/* Do interior commands. */
fixuplabel(cp->u.c, cp->next);
break;
}
}
/*
* Associate the given command label for later lookup.
*/
static void
enterlabel(struct s_command *cp)
{
struct labhash **lhp, *lh;
u_char *p;
u_int h, c;
for (h = 0, p = (u_char *)cp->t; (c = *p) != 0; p++)
h = (h << 5) + h + c;
lhp = &labels[h & LHMASK];
for (lh = *lhp; lh != NULL; lh = lh->lh_next)
if (lh->lh_hash == h && strcmp(cp->t, lh->lh_cmd->t) == 0)
err(COMPILE2, "duplicate label '%s'", cp->t);
lh = xmalloc(sizeof *lh);
lh->lh_next = *lhp;
lh->lh_hash = h;
lh->lh_cmd = cp;
lh->lh_ref = 0;
*lhp = lh;
}
/*
* Find the label contained in the command l in the command linked
* list cp. L is excluded from the search. Return NULL if not found.
*/
static struct s_command *
findlabel(char *name)
{
struct labhash *lh;
u_char *p;
u_int h, c;
for (h = 0, p = (u_char *)name; (c = *p) != 0; p++)
h = (h << 5) + h + c;
for (lh = labels[h & LHMASK]; lh != NULL; lh = lh->lh_next) {
if (lh->lh_hash == h && strcmp(name, lh->lh_cmd->t) == 0) {
lh->lh_ref = 1;
return (lh->lh_cmd);
}
}
return (NULL);
}
/*
* Warn about any unused labels. As a side effect, release the label hash
* table space.
*/
static void
uselabel(void)
{
struct labhash *lh, *next;
int i;
for (i = 0; i < LHSZ; i++) {
for (lh = labels[i]; lh != NULL; lh = next) {
next = lh->lh_next;
if (!lh->lh_ref)
err(WARNING, "unused label '%s'",
lh->lh_cmd->t);
free(lh);
}
}
}

187
usr.bin/sed/defs.h Normal file
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/* $NetBSD: defs.h,v 1.10 2010/02/19 16:35:27 tnn Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)defs.h 8.1 (Berkeley) 6/6/93
* $NetBSD: defs.h,v 1.10 2010/02/19 16:35:27 tnn Exp $
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)defs.h 8.1 (Berkeley) 6/6/93
* $NetBSD: defs.h,v 1.10 2010/02/19 16:35:27 tnn Exp $
*/
/*
* Types of address specifications
*/
enum e_atype {
AT_RE, /* Line that match RE */
AT_LINE, /* Specific line */
AT_LAST /* Last line */
};
/*
* Format of an address
*/
struct s_addr {
enum e_atype type; /* Address type */
union {
u_long l; /* Line number */
regex_t *r; /* Regular expression */
} u;
};
/*
* Substitution command
*/
struct s_subst {
int n; /* Occurrence to subst. */
int p; /* True if p flag */
char *wfile; /* NULL if no wfile */
int wfd; /* Cached file descriptor */
regex_t *re; /* Regular expression */
int maxbref; /* Largest backreference. */
u_long linenum; /* Line number. */
char *new; /* Replacement text */
};
/*
* An internally compiled command.
* Initialy, label references are stored in t, on a second pass they
* are updated to pointers.
*/
struct s_command {
struct s_command *next; /* Pointer to next command */
struct s_addr *a1, *a2; /* Start and end address */
char *t; /* Text for : a c i r w */
union {
struct s_command *c; /* Command(s) for b t { */
struct s_subst *s; /* Substitute command */
u_char *y; /* Replace command array */
int fd; /* File descriptor for w */
} u;
char code; /* Command code */
u_int nonsel:1; /* True if ! */
u_int inrange:1; /* True if in range */
};
/*
* Types of command arguments recognised by the parser
*/
enum e_args {
EMPTY, /* d D g G h H l n N p P q x = \0 */
TEXT, /* a c i */
NONSEL, /* ! */
GROUP, /* { */
ENDGROUP, /* } */
COMMENT, /* # */
BRANCH, /* b t */
LABEL, /* : */
RFILE, /* r */
WFILE, /* w */
SUBST, /* s */
TR /* y */
};
/*
* Structure containing things to append before a line is read
*/
struct s_appends {
enum {AP_STRING, AP_FILE} type;
char *s;
size_t len;
};
enum e_spflag {
APPEND, /* Append to the contents. */
REPLACE /* Replace the contents. */
};
/*
* Structure for a space (process, hold, otherwise).
*/
typedef struct {
char *space; /* Current space pointer. */
size_t len; /* Current length. */
int deleted; /* If deleted. */
char *back; /* Backing memory. */
size_t blen; /* Backing memory length. */
} SPACE;
/*
* Error severity codes:
*/
#define FATAL 0 /* Exit immediately with 1 */
#define ERROR 1 /* Continue, but change exit value */
#define WARNING 2 /* Just print the warning */
#define COMPILE 3 /* Print error, count and finish script */
#define COMPILE2 3 /* Print error, count and finish script */
/*
* Round up to the nearest multiple of _POSIX2_LINE_MAX
*/
#define ROUNDLEN(x) \
(((x) + _POSIX2_LINE_MAX - 1) & ~(_POSIX2_LINE_MAX - 1))

97
usr.bin/sed/extern.h Normal file
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@ -0,0 +1,97 @@
/* $NetBSD: extern.h,v 1.11 2010/02/19 16:35:27 tnn Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)extern.h 8.1 (Berkeley) 6/6/93
* $NetBSD: extern.h,v 1.11 2010/02/19 16:35:27 tnn Exp $
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)extern.h 8.1 (Berkeley) 6/6/93
* $NetBSD: extern.h,v 1.11 2010/02/19 16:35:27 tnn Exp $
*/
extern struct s_command *prog;
extern struct s_appends *appends;
extern regmatch_t *match;
extern size_t maxnsub;
extern u_long linenum;
extern int appendnum;
extern int lastline;
extern int aflag, eflag, nflag;
extern int ere;
extern const char *fname;
void cfclose(struct s_command *, struct s_command *);
void compile(void);
void cspace(SPACE *, const char *, size_t, enum e_spflag);
char *cu_fgets(char **, size_t *);
void err(int, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
int mf_fgets(SPACE *, enum e_spflag);
void process(void);
char *strregerror(int, regex_t *);
void *xmalloc(size_t);
void *xrealloc(void *, size_t);

408
usr.bin/sed/main.c Normal file
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@ -0,0 +1,408 @@
/* $NetBSD: main.c,v 1.21 2010/02/19 16:35:27 tnn Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1992, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94";
#else
__RCSID("$NetBSD: main.c,v 1.21 2010/02/19 16:35:27 tnn Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <regex.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "defs.h"
#include "extern.h"
/*
* Linked list of units (strings and files) to be compiled
*/
struct s_compunit {
struct s_compunit *next;
enum e_cut {CU_FILE, CU_STRING} type;
char *s; /* Pointer to string or fname */
};
/*
* Linked list pointer to compilation units and pointer to current
* next pointer.
*/
static struct s_compunit *script, **cu_nextp = &script;
/*
* Linked list of files to be processed
*/
struct s_flist {
char *fname;
struct s_flist *next;
};
/*
* Linked list pointer to files and pointer to current
* next pointer.
*/
static struct s_flist *files, **fl_nextp = &files;
int aflag, eflag, nflag, ere;
/*
* Current file and line number; line numbers restart across compilation
* units, but span across input files.
*/
const char *fname; /* File name. */
u_long linenum;
int lastline; /* TRUE on the last line of the last file */
static void add_compunit(enum e_cut, char *);
static void add_file(char *);
int main(int, char **);
int
main(int argc, char *argv[])
{
int c, fflag;
setprogname(*argv);
fflag = 0;
while ((c = getopt(argc, argv, "ae:f:nrE")) != -1)
switch (c) {
case 'a':
aflag = 1;
break;
case 'e':
eflag = 1;
add_compunit(CU_STRING, optarg);
break;
case 'f':
fflag = 1;
add_compunit(CU_FILE, optarg);
break;
case 'n':
nflag = 1;
break;
case 'r':
case 'E':
ere = REG_EXTENDED;
break;
default:
case '?':
(void)fprintf(stderr,
"usage:\t%s [-aEnr] script [file ...]\n\t%s [-aEnr] [-e script] ... [-f script_file] ... [file ...]\n",
getprogname(), getprogname());
exit(1);
}
argc -= optind;
argv += optind;
/* First usage case; script is the first arg */
if (!eflag && !fflag && *argv) {
add_compunit(CU_STRING, *argv);
argv++;
}
compile();
/* Continue with first and start second usage */
if (*argv)
for (; *argv; argv++)
add_file(*argv);
else
add_file(NULL);
process();
cfclose(prog, NULL);
if (fclose(stdout))
err(FATAL, "stdout: %s", strerror(errno));
exit (0);
}
/*
* Like fgets, but go through the chain of compilation units chaining them
* together. Empty strings and files are ignored.
*/
char *
cu_fgets(char **outbuf, size_t *outsize)
{
static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
static FILE *f; /* Current open file */
static char *s; /* Current pointer inside string */
static char string_ident[30];
size_t len;
char *p;
if (*outbuf == NULL)
*outsize = 0;
again:
switch (state) {
case ST_EOF:
if (script == NULL)
return (NULL);
linenum = 0;
switch (script->type) {
case CU_FILE:
if ((f = fopen(script->s, "r")) == NULL)
err(FATAL,
"%s: %s", script->s, strerror(errno));
fname = script->s;
state = ST_FILE;
goto again;
case CU_STRING:
if ((snprintf(string_ident,
sizeof(string_ident), "\"%s\"", script->s)) >=
(int)(sizeof(string_ident) - 1))
(void)strcpy(string_ident +
sizeof(string_ident) - 6, " ...\"");
fname = string_ident;
s = script->s;
state = ST_STRING;
goto again;
}
case ST_FILE:
if ((p = fgetln(f, &len)) != NULL) {
linenum++;
if (len >= *outsize) {
free(*outbuf);
*outsize = ROUNDLEN(len + 1);
*outbuf = xmalloc(*outsize);
}
memcpy(*outbuf, p, len);
(*outbuf)[len] = '\0';
if (linenum == 1 && p[0] == '#' && p[1] == 'n')
nflag = 1;
return (*outbuf);
}
script = script->next;
(void)fclose(f);
state = ST_EOF;
goto again;
case ST_STRING:
if (linenum == 0 && s[0] == '#' && s[1] == 'n')
nflag = 1;
p = *outbuf;
len = *outsize;
for (;;) {
if (len <= 1) {
*outbuf = xrealloc(*outbuf,
*outsize + _POSIX2_LINE_MAX);
p = *outbuf + *outsize - len;
len += _POSIX2_LINE_MAX;
*outsize += _POSIX2_LINE_MAX;
}
switch (*s) {
case '\0':
state = ST_EOF;
if (s == script->s) {
script = script->next;
goto again;
} else {
script = script->next;
*p = '\0';
linenum++;
return (*outbuf);
}
case '\n':
*p++ = '\n';
*p = '\0';
s++;
linenum++;
return (*outbuf);
default:
*p++ = *s++;
len--;
}
}
}
/* NOTREACHED */
return (NULL);
}
/*
* Like fgets, but go through the list of files chaining them together.
* Set len to the length of the line.
*/
int
mf_fgets(SPACE *sp, enum e_spflag spflag)
{
static FILE *f; /* Current open file */
size_t len;
char *p;
int c;
if (f == NULL)
/* Advance to first non-empty file */
for (;;) {
if (files == NULL) {
lastline = 1;
return (0);
}
if (files->fname == NULL) {
f = stdin;
fname = "stdin";
} else {
fname = files->fname;
if ((f = fopen(fname, "r")) == NULL)
err(FATAL, "%s: %s",
fname, strerror(errno));
}
if ((c = getc(f)) != EOF) {
(void)ungetc(c, f);
break;
}
(void)fclose(f);
files = files->next;
}
if (lastline) {
sp->len = 0;
return (0);
}
/*
* Use fgetln so that we can handle essentially infinite input data.
* Can't use the pointer into the stdio buffer as the process space
* because the ungetc() can cause it to move.
*/
p = fgetln(f, &len);
if (ferror(f))
err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO));
cspace(sp, p, len, spflag);
linenum++;
/* Advance to next non-empty file */
while ((c = getc(f)) == EOF) {
(void)fclose(f);
files = files->next;
if (files == NULL) {
lastline = 1;
return (1);
}
if (files->fname == NULL) {
f = stdin;
fname = "stdin";
} else {
fname = files->fname;
if ((f = fopen(fname, "r")) == NULL)
err(FATAL, "%s: %s", fname, strerror(errno));
}
}
(void)ungetc(c, f);
return (1);
}
/*
* Add a compilation unit to the linked list
*/
static void
add_compunit(enum e_cut type, char *s)
{
struct s_compunit *cu;
cu = xmalloc(sizeof(struct s_compunit));
cu->type = type;
cu->s = s;
cu->next = NULL;
*cu_nextp = cu;
cu_nextp = &cu->next;
}
/*
* Add a file to the linked list
*/
static void
add_file(char *s)
{
struct s_flist *fp;
fp = xmalloc(sizeof(struct s_flist));
fp->next = NULL;
*fl_nextp = fp;
fp->fname = s;
fl_nextp = &fp->next;
}

164
usr.bin/sed/misc.c Normal file
View file

@ -0,0 +1,164 @@
/* $NetBSD: misc.c,v 1.11 2010/02/19 16:35:27 tnn Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: misc.c,v 1.11 2010/02/19 16:35:27 tnn Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <errno.h>
#include <regex.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "defs.h"
#include "extern.h"
/*
* malloc with result test
*/
void *
xmalloc(size_t size)
{
void *p;
if ((p = malloc(size)) == NULL)
err(FATAL, "%s", strerror(errno));
return (p);
}
/*
* realloc with result test
*/
void *
xrealloc(void *p, size_t size)
{
if (p == NULL) /* Compatibility hack. */
return (xmalloc(size));
if ((p = realloc(p, size)) == NULL)
err(FATAL, "%s", strerror(errno));
return (p);
}
/*
* Return a string for a regular expression error passed. This is a overkill,
* because of the silly semantics of regerror (we can never know the size of
* the buffer).
*/
char *
strregerror(int errcode, regex_t *preg)
{
char buf[1];
static char *oe;
size_t s;
if (oe != NULL)
free(oe);
s = regerror(errcode, preg, buf, 0);
oe = xmalloc(s);
(void)regerror(errcode, preg, oe, s);
return (oe);
}
/*
* Error reporting function
*/
void
err(int severity, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void)fprintf(stderr, "sed: ");
switch (severity) {
case WARNING:
case COMPILE:
(void)fprintf(stderr, "%lu: %s: ", linenum, fname);
}
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
if (severity == WARNING)
return;
exit(1);
/* NOTREACHED */
}

691
usr.bin/sed/process.c Normal file
View file

@ -0,0 +1,691 @@
/* $NetBSD: process.c,v 1.38 2009/04/13 07:29:55 lukem Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* This code is derived from software contributed to Berkeley by
* Diomidis Spinellis of Imperial College, University of London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)process.c 8.6 (Berkeley) 4/20/94";
#else
__RCSID("$NetBSD: process.c,v 1.38 2009/04/13 07:29:55 lukem Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <minix/termios.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "defs.h"
#include "extern.h"
static SPACE HS, PS, SS;
#define pd PS.deleted
#define ps PS.space
#define psl PS.len
#define hs HS.space
#define hsl HS.len
static inline int applies(struct s_command *);
static void flush_appends(void);
static void lputs(char *);
static inline int regexec_e(regex_t *, const char *, int, int, size_t);
static void regsub(SPACE *, char *, char *);
static int substitute(struct s_command *);
struct s_appends *appends; /* Array of pointers to strings to append. */
static int appendx; /* Index into appends array. */
int appendnum; /* Size of appends array. */
static int lastaddr; /* Set by applies if last address of a range. */
static int sdone; /* If any substitutes since last line input. */
/* Iov structure for 'w' commands. */
static regex_t *defpreg;
size_t maxnsub;
regmatch_t *match;
#define OUT(s) { fwrite(s, sizeof(u_char), psl, stdout); }
void
process(void)
{
struct s_command *cp;
SPACE tspace;
size_t len, oldpsl;
char *p;
oldpsl = 0;
for (linenum = 0; mf_fgets(&PS, REPLACE);) {
pd = 0;
top:
cp = prog;
redirect:
while (cp != NULL) {
if (!applies(cp)) {
cp = cp->next;
continue;
}
switch (cp->code) {
case '{':
cp = cp->u.c;
goto redirect;
case 'a':
if (appendx >= appendnum) {
appends = xrealloc(appends,
sizeof(struct s_appends) *
(appendnum * 2));
appendnum *= 2;
}
appends[appendx].type = AP_STRING;
appends[appendx].s = cp->t;
appends[appendx].len = strlen(cp->t);
appendx++;
break;
case 'b':
cp = cp->u.c;
goto redirect;
case 'c':
pd = 1;
psl = 0;
if (cp->a2 == NULL || lastaddr)
(void)printf("%s", cp->t);
break;
case 'd':
pd = 1;
goto new;
case 'D':
if (psl == 0)
pd = 1;
if (pd)
goto new;
if ((p = memchr(ps, '\n', psl - 1)) == NULL) {
pd = 1;
goto new;
} else {
psl -= (p + 1) - ps;
memmove(ps, p + 1, psl);
goto top;
}
case 'g':
cspace(&PS, hs, hsl, REPLACE);
break;
case 'G':
if (hs == NULL)
cspace(&HS, "\n", 1, REPLACE);
cspace(&PS, hs, hsl, 0);
break;
case 'h':
cspace(&HS, ps, psl, REPLACE);
break;
case 'H':
cspace(&HS, ps, psl, 0);
break;
case 'i':
(void)printf("%s", cp->t);
break;
case 'l':
lputs(ps);
break;
case 'n':
if (!nflag && !pd)
OUT(ps)
flush_appends();
if (!mf_fgets(&PS, REPLACE))
exit(0);
pd = 0;
break;
case 'N':
flush_appends();
if (!mf_fgets(&PS, 0)) {
if (!nflag && !pd)
OUT(ps)
exit(0);
}
break;
case 'p':
if (pd)
break;
OUT(ps)
break;
case 'P':
if (pd)
break;
if ((p = memchr(ps, '\n', psl - 1)) != NULL) {
oldpsl = psl;
psl = (p + 1) - ps;
}
OUT(ps)
if (p != NULL)
psl = oldpsl;
break;
case 'q':
if (!nflag && !pd)
OUT(ps)
flush_appends();
exit(0);
case 'r':
if (appendx >= appendnum) {
appends = xrealloc(appends,
sizeof(struct s_appends) *
(appendnum * 2));
appendnum *= 2;
}
appends[appendx].type = AP_FILE;
appends[appendx].s = cp->t;
appends[appendx].len = strlen(cp->t);
appendx++;
break;
case 's':
sdone |= substitute(cp);
break;
case 't':
if (sdone) {
sdone = 0;
cp = cp->u.c;
goto redirect;
}
break;
case 'w':
if (pd)
break;
if (cp->u.fd == -1 && (cp->u.fd = open(cp->t,
O_WRONLY|O_APPEND|O_CREAT|O_TRUNC,
DEFFILEMODE)) == -1)
err(FATAL, "%s: %s",
cp->t, strerror(errno));
if ((size_t)write(cp->u.fd, ps, psl) != psl)
err(FATAL, "%s: %s",
cp->t, strerror(errno));
break;
case 'x':
if (hs == NULL)
cspace(&HS, "\n", 1, REPLACE);
tspace = PS;
PS = HS;
HS = tspace;
break;
case 'y':
if (pd)
break;
for (p = ps, len = psl; --len; ++p)
*p = cp->u.y[(int)*p];
break;
case ':':
case '}':
break;
case '=':
(void)printf("%lu\n", linenum);
}
cp = cp->next;
} /* for all cp */
new: if (!nflag && !pd)
OUT(ps)
flush_appends();
} /* for all lines */
}
/*
* TRUE if the address passed matches the current program state
* (lastline, linenumber, ps).
*/
#define MATCH(a) \
(a)->type == AT_RE ? regexec_e((a)->u.r, ps, 0, 1, psl) : \
(a)->type == AT_LINE ? linenum == (a)->u.l : lastline
/*
* Return TRUE if the command applies to the current line. Sets the inrange
* flag to process ranges. Interprets the non-select (``!'') flag.
*/
static inline int
applies(struct s_command *cp)
{
int r;
lastaddr = 0;
if (cp->a1 == NULL && cp->a2 == NULL)
r = 1;
else if (cp->a2) {
if (cp->inrange) {
if (MATCH(cp->a2)) {
cp->inrange = 0;
lastaddr = 1;
}
r = 1;
} else if (cp->a1 && MATCH(cp->a1)) {
/*
* If the second address is a number less than or
* equal to the line number first selected, only
* one line shall be selected.
* -- POSIX 1003.2
*/
if (cp->a2->type == AT_LINE &&
linenum >= cp->a2->u.l)
lastaddr = 1;
else
cp->inrange = 1;
r = 1;
} else
r = 0;
} else
r = MATCH(cp->a1);
return (cp->nonsel ? ! r : r);
}
/*
* substitute --
* Do substitutions in the pattern space. Currently, we build a
* copy of the new pattern space in the substitute space structure
* and then swap them.
*/
static int
substitute(struct s_command *cp)
{
SPACE tspace;
regex_t *re;
size_t re_off, slen;
int lastempty, n;
char *s;
s = ps;
re = cp->u.s->re;
if (re == NULL) {
if (defpreg != NULL && (size_t)cp->u.s->maxbref > defpreg->re_nsub) {
linenum = cp->u.s->linenum;
err(COMPILE, "\\%d not defined in the RE",
cp->u.s->maxbref);
}
}
if (!regexec_e(re, s, 0, 0, psl))
return (0);
SS.len = 0; /* Clean substitute space. */
slen = psl;
n = cp->u.s->n;
lastempty = 1;
switch (n) {
case 0: /* Global */
do {
if (lastempty || match[0].rm_so != match[0].rm_eo) {
/* Locate start of replaced string. */
re_off = match[0].rm_so;
/* Copy leading retained string. */
cspace(&SS, s, re_off, APPEND);
/* Add in regular expression. */
regsub(&SS, s, cp->u.s->new);
}
/* Move past this match. */
if (match[0].rm_so != match[0].rm_eo) {
s += match[0].rm_eo;
slen -= match[0].rm_eo;
lastempty = 0;
} else {
if (match[0].rm_so == 0)
cspace(&SS,
s, match[0].rm_so + 1, APPEND);
else
cspace(&SS,
s + match[0].rm_so, 1, APPEND);
s += match[0].rm_so + 1;
slen -= match[0].rm_so + 1;
lastempty = 1;
}
} while (slen > 0 && regexec_e(re, s, REG_NOTBOL, 0, slen));
/* Copy trailing retained string. */
if (slen > 0)
cspace(&SS, s, slen, APPEND);
break;
default: /* Nth occurrence */
while (--n) {
s += match[0].rm_eo;
slen -= match[0].rm_eo;
if (!regexec_e(re, s, REG_NOTBOL, 0, slen))
return (0);
}
/* FALLTHROUGH */
case 1: /* 1st occurrence */
/* Locate start of replaced string. */
re_off = match[0].rm_so + (s - ps);
/* Copy leading retained string. */
cspace(&SS, ps, re_off, APPEND);
/* Add in regular expression. */
regsub(&SS, s, cp->u.s->new);
/* Copy trailing retained string. */
s += match[0].rm_eo;
slen -= match[0].rm_eo;
cspace(&SS, s, slen, APPEND);
break;
}
/*
* Swap the substitute space and the pattern space, and make sure
* that any leftover pointers into stdio memory get lost.
*/
tspace = PS;
PS = SS;
SS = tspace;
SS.space = SS.back;
/* Handle the 'p' flag. */
if (cp->u.s->p)
OUT(ps)
/* Handle the 'w' flag. */
if (cp->u.s->wfile && !pd) {
if (cp->u.s->wfd == -1 && (cp->u.s->wfd = open(cp->u.s->wfile,
O_WRONLY|O_APPEND|O_CREAT|O_TRUNC, DEFFILEMODE)) == -1)
err(FATAL, "%s: %s", cp->u.s->wfile, strerror(errno));
if ((size_t)write(cp->u.s->wfd, ps, psl) != psl)
err(FATAL, "%s: %s", cp->u.s->wfile, strerror(errno));
}
return (1);
}
/*
* Flush append requests. Always called before reading a line,
* therefore it also resets the substitution done (sdone) flag.
*/
static void
flush_appends(void)
{
FILE *f;
int count, i;
char buf[8 * 1024];
for (i = 0; i < appendx; i++)
switch (appends[i].type) {
case AP_STRING:
fwrite(appends[i].s, sizeof(char), appends[i].len,
stdout);
break;
case AP_FILE:
/*
* Read files probably shouldn't be cached. Since
* it's not an error to read a non-existent file,
* it's possible that another program is interacting
* with the sed script through the file system. It
* would be truly bizarre, but possible. It's probably
* not that big a performance win, anyhow.
*/
if ((f = fopen(appends[i].s, "r")) == NULL)
break;
while ((count =
fread(buf, sizeof(char), sizeof(buf), f)) > 0)
(void)fwrite(buf, sizeof(char), count, stdout);
(void)fclose(f);
break;
}
if (ferror(stdout))
err(FATAL, "stdout: %s", strerror(errno ? errno : EIO));
appendx = sdone = 0;
}
static void
lputs(char *s)
{
int count;
const char *escapes, *p;
#ifndef HAVE_NBTOOL_CONFIG_H
struct winsize win;
#endif
static int termwidth = -1;
if (termwidth == -1) {
if ((p = getenv("COLUMNS")) != NULL)
termwidth = atoi(p);
#ifndef HAVE_NBTOOL_CONFIG_H
else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
win.ws_col > 0)
termwidth = win.ws_col;
#endif
else
termwidth = 60;
}
for (count = 0; *s; ++s) {
if (count >= termwidth) {
(void)printf("\\\n");
count = 0;
}
if (isascii((unsigned char)*s) && isprint((unsigned char)*s) &&
*s != '\\') {
(void)putchar(*s);
count++;
} else {
escapes = "\\\a\b\f\n\r\t\v";
(void)putchar('\\');
if ((p = strchr(escapes, *s)) != NULL) {
(void)putchar("\\abfnrtv"[p - escapes]);
count += 2;
} else {
(void)printf("%03o", *(u_char *)s);
count += 4;
}
}
}
(void)putchar('$');
(void)putchar('\n');
if (ferror(stdout))
err(FATAL, "stdout: %s", strerror(errno ? errno : EIO));
}
static inline int
regexec_e(regex_t *preg, const char *string, int eflags, int nomatch, size_t slen)
{
int eval;
#ifndef REG_STARTEND
char *buf;
#endif
if (preg == NULL) {
if (defpreg == NULL)
err(FATAL, "first RE may not be empty");
} else
defpreg = preg;
/* Set anchors, discounting trailing newline (if any). */
if (slen > 0 && string[slen - 1] == '\n')
slen--;
#ifndef REG_STARTEND
if ((buf = malloc(slen + 1)) == NULL)
err(1, NULL);
(void)memcpy(buf, string, slen);
buf[slen] = '\0';
eval = regexec(defpreg, buf,
nomatch ? 0 : maxnsub + 1, match, eflags);
free(buf);
#else
match[0].rm_so = 0;
match[0].rm_eo = slen;
eval = regexec(defpreg, string,
nomatch ? 0 : maxnsub + 1, match, eflags | REG_STARTEND);
#endif
switch(eval) {
case 0:
return (1);
case REG_NOMATCH:
return (0);
}
err(FATAL, "RE error: %s", strregerror(eval, defpreg));
/* NOTREACHED */
return (0);
}
/*
* regsub - perform substitutions after a regexp match
* Based on a routine by Henry Spencer
*/
static void
regsub(SPACE *sp, char *string, char *src)
{
int len, no;
char c, *dst;
#define NEEDSP(reqlen) \
if (sp->len + (reqlen) + 1 >= sp->blen) { \
size_t newlen = sp->blen + (reqlen) + 1024; \
sp->space = sp->back = xrealloc(sp->back, newlen); \
sp->blen = newlen; \
dst = sp->space + sp->len; \
}
dst = sp->space + sp->len;
while ((c = *src++) != '\0') {
if (c == '&')
no = 0;
else if (c == '\\' && isdigit((unsigned char)*src))
no = *src++ - '0';
else
no = -1;
if (no < 0) { /* Ordinary character. */
if (c == '\\' && (*src == '\\' || *src == '&'))
c = *src++;
NEEDSP(1);
*dst++ = c;
++sp->len;
} else if (match[no].rm_so != -1 && match[no].rm_eo != -1) {
len = match[no].rm_eo - match[no].rm_so;
NEEDSP(len);
memmove(dst, string + match[no].rm_so, len);
dst += len;
sp->len += len;
}
}
NEEDSP(1);
*dst = '\0';
}
/*
* aspace --
* Append the source space to the destination space, allocating new
* space as necessary.
*/
void
cspace(SPACE *sp, const char *p, size_t len, enum e_spflag spflag)
{
size_t tlen;
/* Make sure SPACE has enough memory and ramp up quickly. */
tlen = sp->len + len + 1;
if (tlen > sp->blen) {
size_t newlen = tlen + 1024;
sp->space = sp->back = xrealloc(sp->back, newlen);
sp->blen = newlen;
}
if (spflag == REPLACE)
sp->len = 0;
memmove(sp->space + sp->len, p, len);
sp->space[sp->len += len] = '\0';
}
/*
* Close all cached opened files and report any errors
*/
void
cfclose(struct s_command *cp, struct s_command *end)
{
for (; cp != end; cp = cp->next)
switch(cp->code) {
case 's':
if (cp->u.s->wfd != -1 && close(cp->u.s->wfd))
err(FATAL,
"%s: %s", cp->u.s->wfile, strerror(errno));
cp->u.s->wfd = -1;
break;
case 'w':
if (cp->u.fd != -1 && close(cp->u.fd))
err(FATAL, "%s: %s", cp->t, strerror(errno));
cp->u.fd = -1;
break;
case '{':
cfclose(cp->u.c, cp->next);
break;
}
}

518
usr.bin/sed/sed.1 Normal file
View file

@ -0,0 +1,518 @@
.\" $NetBSD: sed.1,v 1.27 2008/09/21 16:46:01 wiz Exp $
.\"
.\" Copyright (c) 1992, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)sed.1 8.2 (Berkeley) 12/30/93
.\"
.Dd September 21, 2008
.Dt SED 1
.Os
.Sh NAME
.Nm sed
.Nd stream editor
.Sh SYNOPSIS
.Nm
.Op Fl aEnr
.Ar command
.Op Ar file ...
.Nm
.Op Fl aEnr
.Op Fl e Ar command
.Op Fl f Ar command_file
.Op Ar file ...
.Sh DESCRIPTION
The
.Nm
utility reads the specified files, or the standard input if no files
are specified, modifying the input as specified by a list of commands.
The input is then written to the standard output.
.Pp
A single command may be specified as the first argument to
.Nm .
Multiple commands may be specified by using the
.Fl e
or
.Fl f
options.
All commands are applied to the input in the order they are specified
regardless of their origin.
.Pp
The following options are available:
.Bl -tag -width indent
.It Fl a
The files listed as parameters for the
.Dq w
functions are created (or truncated) before any processing begins,
by default.
The
.Fl a
option causes
.Nm
to delay opening each file until a command containing the related
.Dq w
function is applied to a line of input.
.It Fl E
Enables the use of extended regular expressions instead of the
usual basic regular expression syntax.
.It Fl e Ar command
Append the editing commands specified by the
.Ar command
argument
to the list of commands.
.It Fl f Ar command_file
Append the editing commands found in the file
.Ar command_file
to the list of commands.
The editing commands should each be listed on a separate line.
.It Fl n
By default, each line of input is echoed to the standard output after
all of the commands have been applied to it.
The
.Fl n
option suppresses this behavior.
.It Fl r
Identical to
.Fl E ,
present for compatibility with GNU sed.
.El
.Pp
The form of a
.Nm
command is as follows:
.sp
.Dl [address[,address]]function[arguments]
.sp
Whitespace may be inserted before the first address and the function
portions of the command.
.Pp
Normally,
.Nm
cyclically copies a line of input, not including its terminating newline
character, into a
.Em "pattern space" ,
(unless there is something left after a
.Dq D
function),
applies all of the commands with addresses that select that pattern space,
copies the pattern space to the standard output, appending a newline, and
deletes the pattern space.
.Pp
Some of the functions use a
.Em "hold space"
to save all or part of the pattern space for subsequent retrieval.
.Sh SED ADDRESSES
An address is not required, but if specified must be a number (that counts
input lines
cumulatively across input files), a dollar
.Po
.Dq $
.Pc
character that addresses the last line of input, or a context address
(which consists of a regular expression preceded and followed by a
delimiter).
.Pp
A command line with no addresses selects every pattern space.
.Pp
A command line with one address selects all of the pattern spaces
that match the address.
.Pp
A command line with two addresses selects the inclusive range from
the first pattern space that matches the first address through the next
pattern space that matches the second.
(If the second address is a number less than or equal to the line number
first selected, only that line is selected.)
Starting at the first line following the selected range,
.Nm
starts looking again for the first address.
.Pp
Editing commands can be applied to non-selected pattern spaces by use
of the exclamation character
.Pq Dq \&!
function.
.Sh SED REGULAR EXPRESSIONS
The
.Nm
regular expressions are basic regular expressions (BRE's, see
.Xr re_format 7
for more information).
In addition,
.Nm
has the following two additions to BRE's:
.sp
.Bl -enum -compact
.It
In a context address, any character other than a backslash
.Po
.Dq \e
.Pc
or newline character may be used to delimit the regular expression
by prefixing the first use of that delimiter with a backslash.
Also, putting a backslash character before the delimiting character
causes the character to be treated literally.
For example, in the context address \exabc\exdefx, the RE delimiter
is an
.Dq x
and the second
.Dq x
stands for itself, so that the regular expression is
.Dq abcxdef .
.sp
.It
The escape sequence \en matches a newline character embedded in the
pattern space.
You can't, however, use a literal newline character in an address or
in the substitute command.
.El
.Pp
One special feature of
.Nm
regular expressions is that they can default to the last regular
expression used.
If a regular expression is empty, i.e. just the delimiter characters
are specified, the last regular expression encountered is used instead.
The last regular expression is defined as the last regular expression
used as part of an address or substitute command, and at run-time, not
compile-time.
For example, the command
.Dq /abc/s//XXX/
will substitute
.Dq XXX
for the pattern
.Dq abc .
.Sh SED FUNCTIONS
In the following list of commands, the maximum number of permissible
addresses for each command is indicated by [0addr], [1addr], or [2addr],
representing zero, one, or two addresses.
.Pp
The argument
.Em text
consists of one or more lines.
To embed a newline in the text, precede it with a backslash.
Other backslashes in text are deleted and the following character
taken literally.
.Pp
The
.Dq r
and
.Dq w
functions take an optional file parameter, which should be separated
from the function letter by white space.
Each file given as an argument to
.Nm
is created (or its contents truncated) before any input processing begins.
.Pp
The
.Dq b ,
.Dq r ,
.Dq s ,
.Dq t ,
.Dq w ,
.Dq y ,
.Dq \&! ,
and
.Dq \&:
functions all accept additional arguments.
The following synopses indicate which arguments have to be separated from
the function letters by white space characters.
.Pp
Two of the functions take a function-list.
This is a list of
.Nm
functions separated by newlines, as follows:
.Bd -literal -offset indent
{ function
function
...
function
}
.Ed
.Pp
The
.Dq {
can be preceded by white space and can be followed by white space.
The function can be preceded by white space.
The terminating
.Dq }
must be preceded by a newline (and optionally white space).
.sp
.Bl -tag -width "XXXXXX" -compact
.It [2addr] function-list
Execute function-list only when the pattern space is selected.
.sp
.It [1addr]a\e
.It text
.br
Write
.Em text
to standard output immediately before each attempt to read a line of input,
whether by executing the
.Dq N
function or by beginning a new cycle.
.sp
.It [2addr]b[label]
Branch to the
.Dq \&:
function with the specified label.
If the label is not specified, branch to the end of the script.
.sp
.It [2addr]c\e
.It text
.br
Delete the pattern space.
With 0 or 1 address or at the end of a 2-address range,
.Em text
is written to the standard output.
.sp
.It [2addr]d
Delete the pattern space and start the next cycle.
.sp
.It [2addr]D
Delete the initial segment of the pattern space through the first
newline character and start the next cycle.
.sp
.It [2addr]g
Replace the contents of the pattern space with the contents of the
hold space.
.sp
.It [2addr]G
Append a newline character followed by the contents of the hold space
to the pattern space.
.sp
.It [2addr]h
Replace the contents of the hold space with the contents of the
pattern space.
.sp
.It [2addr]H
Append a newline character followed by the contents of the pattern space
to the hold space.
.sp
.It [1addr]i\e
.It text
.br
Write
.Em text
to the standard output.
.sp
.It [2addr]l
(The letter ell.)
Write the pattern space to the standard output in a visually unambiguous
form.
This form is as follows:
.sp
.Bl -tag -width "carriage-returnXX" -offset indent -compact
.It backslash
\e\e
.It alert
\ea
.It form-feed
\ef
.It newline
\en
.It carriage-return
\er
.It tab
\et
.It vertical tab
\ev
.El
.Pp
Nonprintable characters are written as three-digit octal numbers (with a
preceding backslash) for each byte in the character (most significant byte
first).
Long lines are folded, with the point of folding indicated by displaying
a backslash followed by a newline.
The end of each line is marked with a
.Dq $ .
.sp
.It [2addr]n
Write the pattern space to the standard output if the default output has
not been suppressed, and replace the pattern space with the next line of
input. (Does not begin a new cycle.)
.sp
.It [2addr]N
Append the next line of input to the pattern space, using an embedded
newline character to separate the appended material from the original
contents.
Note that the current line number changes.
.sp
.It [2addr]p
Write the pattern space to standard output.
.sp
.It [2addr]P
Write the pattern space, up to the first newline character to the
standard output.
.sp
.It [1addr]q
Branch to the end of the script and quit without starting a new cycle.
.sp
.It [1addr]r file
Copy the contents of
.Em file
to the standard output immediately before the next attempt to read a
line of input.
If
.Em file
cannot be read for any reason, it is silently ignored and no error
condition is set.
.sp
.It [2addr]s/regular expression/replacement/flags
Substitute the replacement string for the first instance of the regular
expression in the pattern space.
Any character other than backslash or newline can be used instead of
a slash to delimit the RE and the replacement.
Within the RE and the replacement, the RE delimiter itself can be used as
a literal character if it is preceded by a backslash.
.Pp
An ampersand
.Po
.Dq \*[Am]
.Pc
appearing in the replacement is replaced by the string matching the RE.
The special meaning of
.Dq \*[Am]
in this context can be suppressed by preceding it by a backslash.
The string
.Dq \e# ,
where
.Dq #
is a digit, is replaced by the text matched
by the corresponding backreference expression (see
.Xr re_format 7 ) .
.Pp
A line can be split by substituting a newline character into it.
To specify a newline character in the replacement string, precede it with
a backslash.
.Pp
The value of
.Em flags
in the substitute function is zero or more of the following:
.Bl -tag -width "XXXXXX" -offset indent
.It "0 ... 9"
Make the substitution only for the N'th occurrence of the regular
expression in the pattern space.
.It g
Make the substitution for all non-overlapping matches of the
regular expression, not just the first one.
.It p
Write the pattern space to standard output if a replacement was made.
If the replacement string is identical to that which it replaces, it
is still considered to have been a replacement.
.It w Em file
Append the pattern space to
.Em file
if a replacement was made.
If the replacement string is identical to that which it replaces, it
is still considered to have been a replacement.
.El
.sp
.It [2addr]t [label]
Branch to the
.Dq \&:
function bearing the label if any substitutions have been made since the
most recent reading of an input line or execution of a
.Dq t
function.
If no label is specified, branch to the end of the script.
.sp
.It [2addr]w Em file
Append the pattern space to the
.Em file .
.sp
.It [2addr]x
Swap the contents of the pattern and hold spaces.
.sp
.It [2addr]y/string1/string2/
Replace all occurrences of characters in
.Em string1
in the pattern space with the corresponding characters from
.Em string2 .
Any character other than a backslash or newline can be used instead of
a slash to delimit the strings.
Within
.Em string1
and
.Em string2 ,
a backslash followed by any character other than a newline is that literal
character, and a backslash followed by an ``n'' is replaced by a newline
character.
.sp
.It [2addr]!function
.It [2addr]!function-list
Apply the function or function-list only to the lines that are
.Em not
selected by the address(es).
.sp
.It [0addr]:label
This function does nothing; it bears a label to which the
.Dq b
and
.Dq t
commands may branch.
.sp
.It [1addr]=
Write the line number to the standard output followed by a newline
character.
.sp
.It [0addr]
Empty lines are ignored.
.sp
.It [0addr]#
The
.Dq #
and the remainder of the line are ignored (treated as a comment), with
the single exception that if the first two characters in the file are
.Dq #n ,
the default output is suppressed.
This is the same as specifying the
.Fl n
option on the command line.
.El
.Pp
The
.Nm
utility exits 0 on success and \*[Gt]0 if an error occurs.
.Sh SEE ALSO
.Xr awk 1 ,
.Xr ed 1 ,
.Xr grep 1 ,
.Xr regex 3 ,
.Xr re_format 7
.Sh STANDARDS
The
.Nm
function is expected to be a superset of the
.St -p1003.2
specification.
.Sh HISTORY
A
.Nm
command appeared in
.At v7 .