Call awk command in Tcl

Because ' is not an operator that TCL can recognize, it is not possible to use the awk command with the exec awk '/pattern/{do_something} ' file in Tcl, even before ' plus/No. "Can be identified by the Bource shell and other shells, but because the exec awk command is explained in Tcl.

If you want to execute awk commands in Tcl, there are two ways to do it: First, "replace", but take into account the need to used/escape some of the TCL's special characters, and the second is to use {} instead of '. such as statements

EXEC awk '/{print/' blah/'/} ' Temp.fil

Should be written as:

exec awk "/somepattern/{print/$0}" Somefile

Or

exec awk {/somepattern/{print $}} somefile