Re: $$ not always returning the current PID

[Chet Ramey]

> Lectori Salutem,
> 
> During the write of a bash shell script I encountered the following problem,
> i really don't know if i should call it a bug.
> 
> The script which demonstrates the problem is:
> ---------------------------------------------
> #!/bin/bash
> 
> echo_pid() { echo "(Inner script) ${$}"; }
> 
> echo "Outer script: ${$}"
> echo_pid &
> echo "Outer script: ${!}"
> ---------------------------------------------

In a subshell, $$ expands to the same thing as in the parent shell.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet)

Chet Ramey, CWRU    chet@po.CWRU.Edu    http://cnswww.cns.cwru.edu/~chet/