Running a command after a pipe causes Broken Pipe error

[motoslide]

I'm sure this is a simple one, but I'm having a problem where I'm trying to run a command inside a script which is only executed after a pipe. For example, here's the script (minimized to isolate the problem):

who -m | tr -s " " | cut -f5 -d" "|sed 's/(//g'|sed 's/)//g' > $HOME/MYIP

If I run the script, I get my IP address stored in a text file. But, if I run the script like this:
$ echo "TEST" | myscript
I get an empty file in $HOME/MYIP.

To see the actual problem, I get a Broken pipe error on this command:
$ echo "TEST" | who -m

This works in /bin/sh, but not in /bin/bash.

Thanks in advance!

-Rick

"Proof that there is intelligent life in Oregon. Well, Life anyway.

 

[motoslide]

Oops. I believe I've misjudged the problem. It has nothing to do with /bin/sh or /bin/bash. This is more related to differences in the "who" implementation between flavors of *NIX.

I'll need a different means to determine the Client IP address.


"Proof that there is intelligent life in Oregon. Well, Life anyway.