Go back to Previous Directory in Linux using a C program

Question

I am in the directory /home/destination I need to go back to the /home directory. Any ideas on how to implement this using a C-program?

Answer 1

If you'd like to go level up chdir(".."); will do the work. But if you'd like to have behaviour like cd - then you should use this code:

char *prev;
prev = getcwd(prev, 0); /*POSIX.1-2001: will malloc enough memory*/
/*fail if prev is NULL, do something*/
chdir(prev);
free(prev);