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Old 04-21-2004, 08:34 PM   #1
liguorir
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Registered: May 2003
Posts: 256

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Question ksh->Tcl conversion guidelines


I'm trying to determine the syntax change rules necessary for executing ksh commands as Tcl 'exec' commands.

Here's some conversion rules that I have proven, if anyone has any more info ( in any fashion ) , please advise.

-----------------------------------------------------------------
Rule: Remove "
-----------------------------------------------------------------
ksh: cat *.passwd 2>/dev/null | cut -d":" -f1 | sort | uniq
tcl: exec cat *.passwd 2>/dev/null | cut -d: -f1 | sort | uniq
-----------------------------------------------------------------

-----------------------------------------------------------------
Rule: Replace '(..$1..)' with "{..\$1..}"
-----------------------------------------------------------------
ksh: ps -eaf | awk '(print $1}' | grep $1 2>&1
tcl: exec ps -eaf | awk "{print \$1}" | grep $user_login_to_test
-----------------------------------------------------------------

-----------------------------------------------------------------
Rule: Replace "..." with {...}
-----------------------------------------------------------------
ksh: grep "^$(user_login:" /etc/passwd /etc/shadow 2>&1
tcl: exec grep {^$user_login:} /etc/passwd /etc/shadow
-----------------------------------------------------------------

-----------------------------------------------------------------
Rule: Replace '...' with "..." or {...}
-----------------------------------------------------------------
ksh: grep 'Version' user.tcl
tcl: exec grep {Version} user.tcl
tcl: exec grep "Version" user.tcl
-----------------------------------------------------------------




Last edited by liguorir; 04-21-2004 at 09:46 PM.
 
Old 04-21-2004, 09:32 PM   #2
liguorir
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Registered: May 2003
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Question ksh -> Tcl Conversion Notes

------------------------
ksh -> Tcl
------------------------
' ' --> " " or { }

{ } --> " "

" " --> { }

( ) --> { }

"$1" --> "\$1"

{$2} -->

[ ] --> [ ]


Is this right?

Please advise.

Last edited by liguorir; 04-21-2004 at 09:34 PM.
 
Old 04-21-2004, 11:10 PM   #3
cetialphav
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Registered: Sep 2003
Location: Raleigh, NC, USA
Distribution: Fedora
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Most of these rules don't really look right to me. In fact, some of them are just totally broken. To get the best results with the least amount of work, try something like this:

Code:
exec sh -c {your commands here}
So do this:

Code:
cat *.passwd 2>/dev/null | cut -d":" -f1 | sort | uniq

exec sh -c {cat *.passwd 2>/dev/null | cut -d":" -f1 | sort | uniq}
The only thing to remember then is that {} is used for quoting so you have to be careful if you have to pass one of those characters in the shell command.
 
  


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