/*-
 * Copyright (c) 2002-2018 The UbixOS Project.
 * All rights reserved.
 *
 * This was developed by Christopher W. Olsen for the UbixOS Project.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1) Redistributions of source code must retain the above copyright notice, this list of
 *    conditions, the following disclaimer and the list of authors.
 * 2) Redistributions in binary form must reproduce the above copyright notice, this list of
 *    conditions, the following disclaimer and the list of authors in the documentation and/or
 *    other materials provided with the distribution.
 * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to
 *    endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>


#define permRead    0x8
#define permWrite   0x4
#define permExecute 0x2
#define permHidden  0x1


//UbixFS Directory Entry
struct directoryEntry {
  uint32_t  startCluster;   //Starting Cluster Of File
  uint32_t  size;           //Size Of File
  uint32_t  creationDate;  //Date Created
  uint32_t  lastModified;  //Date Last Modified
  uint32_t  uid;           //UID Of Owner
  uint32_t  gid;           //GID Of Owner
  uint16_t attributes;    //Files Attributes
  uint16_t permissions;   //Files Permissions
  char   fileName[256]; //File Name
  };

#define typeFile      1
#define typeContainer 2
#define typeDirectory 4
#define typeDeleted   8

int main(int argc,char **argv) {
  int i = 0x0,x = 0x0,tmpPerms = 0x0;
  char *pwd       = 0x0;
  char *permsData = 0x0;
  FILE *fd;
  struct directoryEntry *dirEntry = 0x0;

  unsigned int *segbase = 0x0;

  __asm __volatile("movl %%gs:0, %0" : "=r" (segbase));

  printf("Segbase: 0x%X - 0x%X\n", segbase, &segbase);

  printf("argc: %i - %i\n", argc, argv[0]);
  exit(0);

  pwd       = (char *)malloc(256);
  permsData = (char *)malloc(13);

  if (argv == 0x0) {
      getcwd(pwd,256);
printf("PWD1: %s\n", pwd);
    if ((fd = fopen(pwd,"rb")) == 0x0) {
      printf("Error: Reading Directory\n");
      exit(1);
      }
    }
  else if (argv[1] == 0x0) {
    getcwd(pwd,256);
printf("PWD2: %s\n", pwd);
    if ((fd = fopen(pwd,"rb")) == 0x0) {
      printf("Error: Reading Directory\n");
      exit(1);
      }
    }
  else {
    getcwd(pwd,256);
printf("PWD3: %s\n", pwd);
    fd = fopen(argv[1],"rb");
    if (fd->fd == 0x0) {
      printf("Error: Reading Directory\n");
      exit(1);
      }    
    }
  dirEntry = (struct directoryEntry *)malloc(fd->size);
  fread(dirEntry,fd->size,1,fd);
  pwd[0] = '/';
  for (i=0;i<(fd->size/sizeof(struct directoryEntry));i++) {
printf("[fN: %s]", dirEntry[i].fileName);
    if ((dirEntry[i].fileName[0] > 0) && (dirEntry[i].fileName[0] != '/')) {
      for (x=0;x<12;x++) {
        permsData[x] = '-';
        }
      if ((dirEntry[i].attributes & typeDeleted) == typeDeleted) {
        permsData[0] = 'd';
        goto next;
        }
      else if ((dirEntry[i].attributes & typeFile) == typeFile) {
        permsData[0] = 'F';
        }
      else if ((dirEntry[i].attributes & typeDirectory) == typeDirectory) {
        permsData[0] = 'D';
        }
      else if ((dirEntry[i].attributes & typeContainer) == typeContainer) {
        permsData[0] = '@';
        }
      else {
        permsData[0] = 'U';
        }
      tmpPerms = ((dirEntry[i].permissions & 0xF00) >> 8);
      if ((tmpPerms & permRead) == permRead) permsData[1] = 'R';
      if ((tmpPerms & permWrite) == permWrite) permsData[2] = 'W';
      if ((tmpPerms & permExecute) == permExecute) permsData[3] = 'E';
      if ((tmpPerms & permHidden) == permHidden) permsData[4] = 'H';
      tmpPerms = ((dirEntry[i].permissions & 0x0F0) >> 4);
      if ((tmpPerms & permRead) == permRead) permsData[5] = 'R';
      if ((tmpPerms & permWrite) == permWrite) permsData[6] = 'W';
      if ((tmpPerms & permExecute) == permExecute) permsData[7] = 'E';
      if ((tmpPerms & permHidden) == permHidden) permsData[8] = 'H';
      tmpPerms = ((dirEntry[i].permissions & 0x00F) >> 0);
      if ((tmpPerms & permRead) == permRead) permsData[9] = 'R';
      if ((tmpPerms & permWrite) == permWrite) permsData[10] = 'W';
      if ((tmpPerms & permExecute) == permExecute) permsData[11] = 'E';
      if ((tmpPerms & permHidden) == permHidden) permsData[12] = 'H';       
      printf("%s %i %i %i %s\n",permsData,(int)dirEntry[i].uid,(int)dirEntry[i].gid,(int)dirEntry[i].size,dirEntry[i].fileName);
      next:
      asm("nop");
      }
    }
  if (fclose(fd) != 0x0) {
    printf("Error Closing Directory\n");
    }
  return(0);
  }