[cs631apue] Does $$ represents the shell's pid or the current process's pid?
Shicong Huang
shuang14 at stevens.edu
Thu Dec 17 22:02:18 EST 2015
Hi professor,
The instruction said "$$ The current process ID.". But it seems bash always
treats $$ as the process id of itself. Consider the following commands:
bash$ ls -l | echo $$
bash$ echo $$
They all print the shell's process id.
So, what should we do?
Thanks!
Shicong Huang
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