Parsing filename and directories out of given path in C

Sample code for how to parse directory structure and path names for a given path string in C. I will use this for the webpage retreiver project I am working on.

#include <string.h>
#include <stddef.h>
#include <libgen.h>
#include <stdio.h>

/* This program parses the path given in the argument into directories
* and filename, creates the directory structure and creates an
* empty file as well */
int
main (int argc, char **argv)
{
const char delimiters[] = "/\\"; /* File delimiters */
char *token, *oldtoken, *cp;
const char program_directory = getcwd (NULL, 0);  /* Program directory */

/* Create copy of path string */
cp = malloc (strlen (argv[1]));
strcpy (cp, argv[1]);

/* Split string into tokens */
token = strtok (cp, delimiters);

printf ("Directory = ");

/* While token is not NULL */
while (1)
{
oldtoken = malloc (strlen (token));
strcpy (oldtoken, token); /* Copy current token */
token = strtok (NULL, delimiters); /* Go to the next token */
/* If nexxt token is NULL, it is the last part and assumed to
* be a filename */
if (token == NULL)
 {
   printf ("\nFilename = %s\n", oldtoken);
   /* Create an empty file of that name */
   FILE *fp;
   fp = fopen (oldtoken, "w");
   fclose (fp);
   break;
 }
/* Otherwise it is a directory */
else
 {
   printf ("%s ", oldtoken);
   mkdir (oldtoken, 0755); /* Create the directory */
   chdir (oldtoken); /* Go there */
 }
 free (oldtoken);
}
printf ("\n");
/* Free any memory elements */
free (cp);
oldtoken = NULL;

chdir (program_directory);
}