Hi,

I have been trying to call SED from TCL using the exec function and it
behaves differently then if I called the same SED function from the
shell (command line).

I am trying to extract only certain lines from a file as follow:

sed -n '5,10p' $Filename

If I type this from the command line in ksh, I get what I expect, lines
5 to 10 are printed to standard output.

However, if I try to call that same function within TCL using exec,
nothing returns.

catch {exec ksh -c "sed '5,10p' $Filename"} content

I have tried not using -n on sed but then all the file gets printed to
standard output when called from command line with duplicates of lines
5 to 10. When I don't use the -n flag from withing TCL (with exec), all
the file is printed without duplicates of line 5 to 10.

Can someone help me with this? I don't understand what is happening
here?

Thank you,

lac

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