The readlink system call retrieves the target of a symbolic link.
Unusually, readlink does not NUL-terminate the target path
that it fills into the buffer. It does, however, return the number of characters in the target path, so NUL-terminating the string is simple.
The small http://siber.cankaya.edu.tr/SystemsProgramming/cfiles/print-symlink.c program in Fig. 7 prints the target of the symbolic link specified on its command line.
