ksh->Tcl

liguorir · 04-21-2004, 08:34 PM

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
-----------------------------------------------------------------

liguorir · 04-21-2004, 09:32 PM

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

{ } --> " "

" " --> { }

( ) --> { }

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

{$2} -->

[ ] --> [ ]

Is this right?

Please advise.

cetialphav · 04-21-2004, 11:10 PM

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.