From owner-freebsd-bugs  Sat Mar 21 13:40:04 1998
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id NAA06411
          for freebsd-bugs-outgoing; Sat, 21 Mar 1998 13:40:04 -0800 (PST)
          (envelope-from owner-freebsd-bugs@FreeBSD.ORG)
Received: (from gnats@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id NAA06380;
          Sat, 21 Mar 1998 13:40:02 -0800 (PST)
          (envelope-from gnats)
Date: Sat, 21 Mar 1998 13:40:02 -0800 (PST)
Message-Id: <199803212140.NAA06380@hub.freebsd.org>
To: freebsd-bugs
Cc: 
From: Tor Egge <Tor.Egge@idi.ntnu.no>
Subject: Re: bin/6087: sh doesn't work properly on certain configuration scripts
Reply-To: Tor Egge <Tor.Egge@idi.ntnu.no>
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

The following reply was made to PR bin/6087; it has been noted by GNATS.

From: Tor Egge <Tor.Egge@idi.ntnu.no>
To: giffunip@asme.org
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: bin/6087: sh doesn't work properly on certain configuration scripts
Date: Sat, 21 Mar 1998 22:33:54 +0100

 ----Next_Part(Sat_Mar_21_22:32:09_1998)--
 Content-Type: Text/Plain; charset=us-ascii
 Content-Transfer-Encoding: 7bit
 
 
 ash removes quoting information during parsing, thus the evaluation
 pass is not able to differentiate between
 
 	""$foobar
 
 and
 	$foobar
 
 
 This breaks proper handling of word splitting.  When $foobar expands
 to a single space, bash misbehaves too, for a slightly different
 reason.
 
 bash and ksh93 seems to perform word splitting differently:
 
 	( IFS="beh"; foobar="ghi"; echo "abc"abc$foobar "def"def )
 
 bash gives	abca cg i defdef
 
 ksh93 gives	abcabcg i defdef
 
 bash seems to follow POSIX 1003.2 draft 11.2 while ksh93 seems to
 follow spec1170 for this example.
 
 I'm using some patches that changes the word splitting handling for
 ash in an attempt to follow spec 1170 while not being bug compatible
 with ksh93.  Thus your test script does not complain when run on 
 my development system.
 
 A slightly bigger test script is appended here. It reveals some
 of the other anomalies in bash and ksh93.
 
 - Tor Egge
 
 ----Next_Part(Sat_Mar_21_22:32:09_1998)--
 Content-Type: Text/Plain; charset=us-ascii
 Content-Transfer-Encoding: 7bit
 Content-Description: "sh-ifs-test"
 
 #!/bin/sh 
 
 echo "Tests of IFS handling and word splitting, v1.0 running"
 
 exec 2>&1
 
 if [ `echo -n | wc -l` = 0 ]
 then
   echo1="-n"
   echo2="--> "
   echo3=""
 else
   echo1=""
   echo2="--> \c"
   echo3="\c"
 fi
 
 echo '[OIFS="$IFS"]'
 OIFS="$IFS"
 
 # echo '[var="*"]'
 # var="*"
 # echo $echo1 '[echo $var]                 ' "$echo2"
 # echo $var
 # echo $echo1 '[echo "$var"]               ' "$echo2"
 # echo "$var"
 
 showargs() {
     XIFS="$IFS"
     IFS=" 	
 "
     for arg in "$@"
     do
       echo $echo1 "'$arg' $echo3"
     done
     echo
     IFS="$XIFS"
 }
 
 echo '[set abc "def ghi" jkl]'
 set abc "def ghi" jkl
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo 'set "" abc "def ghi" "" jkl ""'
 set "" abc "def ghi" "" jkl ""
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo '[IFS=""]'
 IFS=""
 
 echo 'set "" abc "def ghi" "" jkl ""'
 set "" abc "def ghi" "" jkl ""
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo '[unset IFS]'
 unset IFS
 
 echo 'set "" abc "def ghi" "" jkl ""'
 set "" abc "def ghi" "" jkl ""
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo '[IFS=":"]'
 IFS=":"
 
 echo 'set "" abc "def ghi" "" jkl ""'
 set "" abc "def ghi" "" jkl ""
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo '[IFS=":$OIFS"]'
 IFS=":$OIFS"
 
 echo 'set "" abc "def ghi" "" jkl ""'
 set "" abc "def ghi" "" jkl ""
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo '[IFS="$OIFS:"]'
 IFS="$OIFS:"
 
 echo 'set "" abc "def ghi" " : " jkl ""'
 set "" abc "def ghi" " : " jkl ""
 echo $echo1 '[showargs $*]               ' "$echo2"
 showargs $*
 echo $echo1 '[showargs "$*"]             ' "$echo2"
 showargs "$*"
 echo $echo1 '[showargs $@]               ' "$echo2"
 showargs $@
 echo $echo1 '[showargs "$@"]             ' "$echo2"
 showargs "$@"
 echo $echo1 '[showargs "xx$@yy"]         ' "$echo2"
 showargs "xx$@yy"
 echo $echo1 '[showargs "$@$@"]           ' "$echo2"
 showargs "$@$@"
 
 echo $echo1 '[showargs "" ab "" cd ef]   ' "$echo2"
 showargs "" ab "" cd ef
 
 echo '[A=""]'
 A=""
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo $echo1 '[showargs ${A}""]           ' "$echo2"
 showargs ${A}""
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ""${A}]           ' "$echo2"
 showargs ""${A}
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 
 echo '[A=" "]'
 A=" "
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo $echo1 '[showargs ${A}""]           ' "$echo2"
 showargs ${A}""
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ""${A}]           ' "$echo2"
 showargs ""${A}
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 
 echo '[A="  "]'
 A="  "
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo $echo1 '[showargs ${A}""]           ' "$echo2"
 showargs ${A}""
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ""${A}]           ' "$echo2"
 showargs ""${A}
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 
 echo '[A=":"]'
 A=":"
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo $echo1 '[showargs ${A}""]           ' "$echo2"
 showargs ${A}""
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ""${A}]           ' "$echo2"
 showargs ""${A}
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 echo '[A="X:"]'
 A="X:"
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo '[A="X :"]'
 A="X :"
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo '[A="X : "]'
 A="X : "
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo '[A="X: "]'
 A="X: "
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 
 echo '[A="::"]'
 A="::"
 echo $echo1 '[showargs ${A}]             ' "$echo2"
 showargs ${A}
 echo $echo1 '[showargs ${A}""]           ' "$echo2"
 showargs ${A}""
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ""${A}]           ' "$echo2"
 showargs ""${A}
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 
 echo '[A="ab:c:"]'
 A="ab:c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="ab:  c:"]'
 A="ab:  c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="ab : c:"]'
 A="ab : c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="ab   c:"]'
 A="ab   c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="a   b:c:"]'
 A="a   b:c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="a:b:c:"]'
 A="a:b:c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="a  :b:c:"]'
 A="a  :b:c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="a : b:c:"]'
 A="a : b:c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="a:  b:c:"]'
 A="a:  b:c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo '[A="a:  b c:"]'
 A="a:  b c:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 
 echo '[A="a b  c  d    e"]'
 A="a b  c  d    e"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 
 echo $echo1 '[showargs "$A"]             ' "$echo2"
 showargs "$A"
 
 echo '[A="   a b  c  d    e   "]'
 A="   a b  c  d    e   "
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 
 echo '[A=":a b  c  d  ::  e:"]'
 A=":a b  c  d  ::  e:"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo $echo1 '[echo $A]                   ' "$echo2"
 echo $A
 echo '[A=":a b  c  d  ::  f::"]'
 A=":a b  c  d  ::  f::"
 echo $echo1 '[showargs $A]               ' "$echo2"
 showargs $A
 echo $echo1 '[echo $A]                   ' "$echo2"
 echo $A
 
 echo '[A=":"]'
 A=":"
 echo $echo1 '[showargs X${A}Y${A}X]      ' "$echo2"
 showargs X${A}Y${A}X
 echo $echo1 '[showargs X${A}${A}X]       ' "$echo2"
 showargs X${A}${A}X
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 echo $echo1 '[showargs X${A}${A}]        ' "$echo2"
 showargs X${A}${A}
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ${A}${A}X]        ' "$echo2"
 showargs ${A}${A}X
 
 echo '[A="::"]'
 A="::"
 echo $echo1 '[showargs X${A}Y${A}X]      ' "$echo2"
 showargs X${A}Y${A}X
 echo $echo1 '[showargs X${A}${A}X]       ' "$echo2"
 showargs X${A}${A}X
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 echo $echo1 '[showargs X${A}${A}]        ' "$echo2"
 showargs X${A}${A}
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ${A}${A}X]        ' "$echo2"
 showargs ${A}${A}X
 
 echo '[A=" ::"]'
 A=" ::"
 echo $echo1 '[showargs X${A}Y${A}X]      ' "$echo2"
 showargs X${A}Y${A}X
 echo $echo1 '[showargs X${A}${A}X]       ' "$echo2"
 showargs X${A}${A}X
 echo $echo1 '[showargs X${A}]            ' "$echo2"
 showargs X${A}
 echo $echo1 '[showargs X${A}${A}]        ' "$echo2"
 showargs X${A}${A}
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 echo $echo1 '[showargs ${A}${A}X]        ' "$echo2"
 showargs ${A}${A}X
 
 echo '[A="ab     "]'
 A="ab     "
 echo 'B="     cde"]'
 B="     cde"
 
 echo $echo1 '[showargs $A$B]             ' "$echo2"
 showargs $A$B
 
 echo '[A="ab     :"]'
 A="ab     :"
 echo '[B="     cde"]'
 B="     cde"
 
 echo $echo1 '[showargs $A$B]             ' "$echo2"
 showargs $A$B
 
 echo $echo1 '[showargs ${A}X]            ' "$echo2"
 showargs ${A}X
 
 echo $echo1 '[echo "a:b:c"]              ' "$echo2"
 echo "a:b:c"
 
 echo $echo1 '[echo "a:b\:c"]             ' "$echo2"
 echo "a:b\:c"
 
 echo $echo1 '[echo a:b:c]                ' "$echo2"
 echo a:b:c
 
 echo $echo1 '[echo a:b\:c]               ' "$echo2"
 echo a:b\:c
 
 echo $echo1 '[echo a:b:c":d:e:f"]        ' "$echo2"
 echo a:b:c":d:e:f"
 
 echo $echo1 '[echo a:b\:c":d:e\:f"]      ' "$echo2"
 echo a:b\:c":d:e\:f"
 
 echo '[var="val:val2\:val3"]'
 var="val:val2\:val3"
 
 echo '[xvar=":val:val2\:val3"]'
 xvar=":val:val2\:val3"
 
 echo $echo1 '[echo $novar:b:c]           ' "$echo2"
 echo $novar:b:c
 
 echo $echo1 '[echo $xvar]                ' "$echo2"
 echo $xvar
 
 echo $echo1 '[echo "$var:b:c"]           ' "$echo2"
 echo "$var:b:c"
 
 echo $echo1 '[echo "$var:b\:c"]          ' "$echo2"
 echo "$var:b\:c"
 
 echo $echo1 '[echo $var:b:c]             ' "$echo2"
 echo $var:b:c
 
 echo $echo1 '[echo $var:b\:c]            ' "$echo2"
 echo $var:b\:c
 
 echo $echo1 '[echo $var:b:c":$var:e:f"]  ' "$echo2"
 echo $var:b:c":$var:e:f"
 
 echo $echo1 '[echo $var:b\:c":$var:e\:f"]' "$echo2"
 echo $var:b\:c":$var:e\:f"
 
 echo $echo1 '[echo $var:`echo '\''h:i'\''`]    ' "$echo2"
 echo $var:`echo 'h:i'`
 
 echo $echo1 '[echo $var:"`echo '\''h:i'\''`"]  ' "$echo2"
 echo $var:"`echo 'h:i'`"
 
 echo '[IFS="${OIFS}a"]'
 IFS="${OIFS}a"
 echo '[HOME="harmless"]'
 HOME="/harmless"
 
 echo $echo1 '[echo ~]                    ' "$echo2"
 echo ~
 
 echo $echo1 '[echo ~/$var]               ' "$echo2"
 echo ~/$var
 
 echo $echo1 '[echo ~root]                ' "$echo2"
 echo ~root
 
 echo $echo1 '[echo ~roo'\''t'\'']              ' "$echo2"
 echo ~roo't'
 
 echo $echo1 '[echo ~roo"t"]              ' "$echo2"
 echo ~roo"t"
 
 echo $echo1 '[echo ~root\/]              ' "$echo2"
 echo ~root\/
 
 echo $echo1 '[echo \~root]               ' "$echo2"
 echo \~root
 
 echo $echo1 '[echo "~"root]              ' "$echo2"
 echo "~"root
 
 echo $echo1 '[echo var:bad:bad]          ' "$echo2"
 echo var:bad:bad
 
 echo $echo1 '[echo $var:bad:bad]         ' "$echo2"
 echo $var:bad:bad
 
 echo $echo1 '[echo $var:bad:"bad"]       ' "$echo2"
 echo $var:bad:"bad"
 
 echo $echo1 '[echo $var:bad:'\''bad'\'']       ' "$echo2"
 echo $var:bad:'bad'
 
 if [ ! `echo "$((4+4))"` = 8 ]
 then
    echo "Extended syntax not supported."	
    exit 0
 fi
 
 echo '[IFS="${OIFS}:"]'
 IFS="${OIFS}:"
 echo $echo1 '[echo $var:$(echo '\''f:g'\'')]   ' "$echo2"
 echo $var:$(echo 'f:g')
 
 echo $echo1 '[echo $var:"$(echo '\''f:g'\'')"] ' "$echo2"
 echo $var:"$(echo 'f:g')"
 
 echo $echo1 '[echo $var:$((4+4))]        ' "$echo2"
 echo $var:$((4+4))
 
 echo '[IFS="${OIFS}6"]'
 IFS="${OIFS}6"
 echo $echo1 '[echo 262144:$((13*13))]    ' "$echo2"
 echo 262144:$((13*13))
 
 echo $echo1 '[echo 262144":$((13*13))"]  ' "$echo2"
 echo 262144":$((13*13))"
 
 # No shells seems to support this construct, due to separate passes
 # for parsing and evaluation:
 # 		echo "$((4+`echo '4))'`"
 # If parsing was performed during evaluation, the result could be
 # "$((4+`echo '4))'`"   (initial state)
 # "$((4+`echo '4))'`"   (after tilde expansion)
 # "$((4+`echo '4))'`"   (after parameter expansion)
 # "$((4+4))"		(after command substitution)
 # "8"			(after arithmetic expansion)
 # "8"			(after field splitting)
 # "8"			(after pathname expansion)
 # 8			(after quote removal)
 
 
 ----Next_Part(Sat_Mar_21_22:32:09_1998)----

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message