chdir() & multithreading in C

Question

Is it possible to use chdir() or some other command to change the directory in a thread without affecting the cwd of the other threads ? I'm using pthread.h.

*I'm trying to write a server program that handles multiple client connections and requests. One of the available commands to the client is the 'cd' command.

Answer 1

No, as mentioned by others the current working directory is a per-process property, not per-thread. You can "emulate" a per-thread (or per client, or however you structure your application) current working directory by storing a file descriptor for the "per-thread CWD" and the using the various *at() syscalls specified in POSIX 2008 (openat() etc.) to manipulate paths relative to that directory fd.