bug-bash
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: $$ not always returning the current PID


From: Chet Ramey
Subject: Re: $$ not always returning the current PID
Date: Mon, 25 Feb 2002 08:35:42 -0500

> 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    address@hidden    http://cnswww.cns.cwru.edu/~chet/



reply via email to

[Prev in Thread] Current Thread [Next in Thread]