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kill, slay, broke: dont pollute environment, use $user

--- a/rc/bin/broke

+++ b/rc/bin/broke

@@ -1,8 +1,8 @@

 #!/bin/rc

-U=`{cat /dev/user}

+rfork e

 if(~ $#* 1){

-	U=$1

+	user=$1

 }

-ps | sed -n '/^'$U' .* Broken/s%[^ ]*  *%~>/proc/%

+ps | sed -n '/^'$user' .* Broken/s%[^ ]*  *%~>/proc/%

 s%  *.* (.*)%/ctl # \1%

 s%~%echo kill%p'

--- a/rc/bin/kill

+++ b/rc/bin/kill

@@ -1,8 +1,7 @@

 #!/bin/rc

 rfork e

-U=`{cat /dev/user}

 for(i){

-	ps | sed -n '/^'$U' .* '$i'$/s%[^ ]*  *%~>/proc/%

+	ps | sed -n '/^'$user' .* '$i'$/s%[^ ]*  *%~>/proc/%

 	s%  *.* (.*)%/note} # \1%

 	s%~%@{echo kill%p'

 }

--- a/rc/bin/slay

+++ b/rc/bin/slay

@@ -1,7 +1,7 @@

 #!/bin/rc

-U=`{cat /dev/user}

+rfork e

 for(i){

-	ps | sed -n '/^'$U' .* '$i'$/s%[^ ]*  *%~>/proc/%

+	ps | sed -n '/^'$user' .* '$i'$/s%[^ ]*  *%~>/proc/%

 	s%  *.* (.*)%/ctl} # \1%

 	s%~%@{echo kill%p'

 }

-- 

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