'ls' command implementation for Linux/Unix in C

This program simulates the simple list directory 'ls' command in Unix. It uses the inbuilt system calls to create this functionality.

#include <sys/types.h>
#include <sys/dir.h>
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>

#define FALSE 0
#define TRUE !FALSE

extern  int alphasort(); //Inbuilt sorting function

char pathname[MAXPATHLEN];

void die(char *msg)
{
  perror(msg);
  exit(0);
}

int file_select(struct direct *entry)
{
    if ((strcmp(entry->d_name, ".") == 0) || (strcmp(entry->d_name, "..") == 0))
        return (FALSE);
    else
        return (TRUE);
}

int main()
{
    int count,i;
    struct direct **files;

    if(!getcwd(pathname, sizeof(pathname)))
        die("Error getting pathname\n");

    printf("Current Working Directory = %s\n",pathname);
    count = scandir(pathname, &files, file_select, alphasort);

    /* If no files found, make a non-selectable menu item */
    if(count <= 0)
      die("No files in this directory\n");
    
    printf("Number of files = %d\n",count);
    for (i=1; i<count+1; ++i)
        printf("%s  ",files[i-1]->d_name);
    printf("\n"); /* flush buffer */
}