Go back to Previous Directory in Linux using a C program

问题

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?

回答1:

A program can only change its own environment. Thus, the program can chdir but it will not change the current directory of the parent. That's why cd can't be implemented as an external command.

回答2:

You can use the chdir function for this:

chdir(".."); /* change current working directory, go one level up */

回答3:

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);

来源：https://stackoverflow.com/questions/7089834/go-back-to-previous-directory-in-linux-using-a-c-program