fstest_utils.c

Simple Operating Systems （简称SOS）是一个可以运行在X86平台上（包括QEMU

/* Copyright (C) 2005  David Decotigny

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
   USA. 
*/

#include <libc.h>
#include <debug.h>

#include "fstest_utils.h"


/** Helper functions that dumps the contents of the current working
    directory of the process */
static void cwd_ls(int detailed, int recursive, int reclevel)
{
  char tab[256], *c;
  int i;
  struct dirent * dirent;
  DIR * here;

  here = opendir(".");
  if (! here)
    return;

  /* Build initial tabulation */
  if (recursive)
    {
      for (c = tab, i = 0 ; (i < reclevel) && (i < sizeof(tab)/2) ; i++)
	{
	  *c++ = ' ';
	  *c++ = ' ';
	}
      *c++ = '\0';
    }
  else
    *tab = '\0';

  while ((dirent = readdir(here)) != NULL)
    {
      char entrychar;
      char * entrysuffix;

      switch(dirent->type)
	{
	case S_IFREG: entrychar='-'; entrysuffix=""; break;
	case S_IFDIR: entrychar='d'; entrysuffix="/"; break;
	case S_IFLNK: entrychar='l'; entrysuffix="@"; break;
	default: entrychar='?'; entrysuffix="?!?"; break;
	}

      if (detailed)
	{
	  struct stat stat;
	  char target_name[SOS_FS_DIRENT_NAME_MAXLEN];
	  
	  if (lstat(dirent->name, & stat))
	    continue;

	  *target_name = '\0';
	  if (stat.st_type==S_IFLNK)
	    {
	      int fd = open(dirent->name, O_RDONLY | O_NOFOLLOW);
	      if (fd >= 0)
		{
		  int len = read(fd, target_name, sizeof(target_name) - 1);
		  if (len < 0)
		    *target_name='\0';
		  else
		    target_name[len] = '\0';
		  close(fd);
		}
	    }

	  bochs_printf("%s%c%c%c%c %lld %s%s%s%s (location=0x%llx)\n",
		       tab, entrychar,
		       (stat.st_access_rights&S_IRUSR)?'r':'-',
		       (stat.st_access_rights&S_IWUSR)?'w':'-',
		       (stat.st_access_rights&S_IXUSR)?'x':'-',
		       stat.st_size,
		       dirent->name,
		       entrysuffix,
		       (stat.st_type==S_IFLNK)?" -> ":"",
		       target_name,
		       stat.st_storage_location);
	}
      else
	  bochs_printf("%s%s%s\n",
		       tab, dirent->name, entrysuffix);

      /* Next iteration */
      if (recursive)
	{
	  int fd_here = dirfd(here);
	  if (chdir(dirent->name))
	    continue;
	  cwd_ls(detailed, recursive, reclevel+1);
	  if(fchdir(fd_here))
            {
		closedir(here);
	        return;
            }
	}
    }
  closedir(here);
}


void ls(const char * path, int detailed, int recursive)
{
  int fd_here = open(".", O_RDONLY | O_DIRECTORY);
  if (fd_here < 0)
    return;

  if (chdir(path))
    {
      close(fd_here);
      return;
    }

  bochs_printf("----------- Contents of %s:\n", path);
  cwd_ls(detailed, recursive, 1);
  bochs_printf("---------------------------\n");

  fchdir(fd_here);
  close(fd_here);
}