NAME
getcwd - get current working directory pathname
SYNOPSIS
#include <unistd.h>
char *getcwd(char *pathname, size_t len)
DESCRIPTION
Getcwd copies the absolute pathname of the current working
directory to pathname and returns a pointer to the result.
Pathname is a character array of length len.
DIAGNOSTICS
Getcwd returns a null pointer and sets errno if an error
occurs. The error will reflect the system call errors that
may occur if the path to the current directory is searched
upwards to the root directory. The error ERANGE is returned
if the result does not fit within len bytes.