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CHDIR(2) System Calls Manual CHDIR(2) NAME chdir, chroot - change working or root directory SYNOPSIS int chdir(dirname) char *dirname; int chroot(dirname) char *dirname; DESCRIPTION Chdir changes the working directory of the invoking process to dirname; chroot changes its root directory. The root directory is the starting point when searching for pathnames beginning with The working directory is the starting point for path- names that don't. The root directory normally points to the system root. Login(8) initially sets the working directory as specified in the password file. After chroot, it is impossible to name a file outside the subtree rooted at the current root, provided that the current directory is lo- cated within the subtree and there are no links pointing outside the subtree (except for the entry in the root directory). Chroot may only be used by the super-user. SEE ALSO sh(1), passwd(5) DIAGNOSTICS EACCES, EFAULT, EIO, ELOOP, ENOENT, ENOTDIR, EPERM (chroot only) BUGS Using chroot, it is quite easy to fool set-userid programs about the contents of the password file (for example). CHDIR(2)