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Here are a few pointers...

A common block is supposed to be that, common...so, if you only specify one of them, there is typically no need for it, in the first place.

What makes a common block...

I just found something somewhere else...don't quite understand it, but here it is


trap 'kill $!; exit 1' INT QUIT TERM

if [[ -t 0 ]] ; then
$cmd $*
else
tee...

Hhhmmm...that is not exactly what I am asking.

Let's say that the short script you show above is named "prog"...can you type

prog < infile > outfile

at the command line and works? I don't...

Say I have a single bin directory with Linux and SunOS executables, like this:

bin/myprog_lnx
bin/myprog_sun

Assume these programs read from stdin and write to stdout and, thus, are meant to...