How does a Linux/Unix Bash script know its own PID?
I have a script in Bash called Script.sh, and it needs to know its own PID (i.e. I need to get PID inside the Script.sh )
Any idea how to do this ?
The variable $$ contains the PID.
use $BASHPID or $$
See the [manual][1] for more information, including differences between the two.
TL;DRTFM
-
$$Expands to the process ID of the shell.- In a
()subshell, it expands to the process ID of the invoking shell, not the subshell.
- In a
-
$BASHPIDExpands to the process ID of the current Bash process (new to bash 4).- In a
()subshell, it expands to the process ID of the subshell [1]: http://www.gnu.org/software/bash/manual/bashref.html#Bash-Variables
- In a