Does a parent bash script remember the cd history from a child bash script?

Question

Example:

mainscript.sh

cd /mnt/something
./buildscripts/000-script.sh

000-script.sh

cd /mnt/otherthing
mkdir something
exit

Answer 1

Yes the executed process will not change the working directory of the parent process.

Example:

• caller.sh

  #!/bin/bash
  echo -n "Caller 1 " ; pwd
  ./callee.sh
  echo -n "Caller 2 " ; pwd
  

• callee.sh

  #!/bin/bash
  echo -n "Callee 1 " ; pwd
  cd /tmp
  echo -n "Callee 2 " ; pwd
  exit
  

Calling caller.sh will produce

Caller 1 /Users/corti/tmp
Callee 1 /Users/corti/tmp
Callee 2 /tmp
Caller 2 /Users/corti/tmp

As you see when printing Caller 2 the parent process has still the same working directory

Answer 2

The "child" is not remembering anything. This is just a basic concept that processes are started from their current working directory (cwd). If you look at /proc/* on a Linux-system you can see that entry for every process.