why calling cd shell command through system() or execvp() from a child process won't work?

问题

I understand that i am supposed to use chdir() but I just need an explanation as to why calling cd shell command through system or execvp() from a child process would not work? Thanks!!

回答1:

Because chdir only modifies the environment of the current process. It can't touch the environment of the parent.

See also the link posted by tripleee.

来源：https://stackoverflow.com/questions/7120493/why-calling-cd-shell-command-through-system-or-execvp-from-a-child-process-w