commands/ls.c

   1 /* ls.c - command to list files and devices */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2003,2005  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include <grub/types.h>
  22 #include <grub/misc.h>
  23 #include <grub/mm.h>
  24 #include <grub/err.h>
  25 #include <grub/dl.h>
  26 #include <grub/normal.h>
  27 #include <grub/arg.h>
  28 #include <grub/disk.h>
  29 #include <grub/device.h>
  30 #include <grub/term.h>
  31 #include <grub/partition.h>
  32 #include <grub/file.h>
  33
  34 static const struct grub_arg_option options[] =
  35   {
  36     {"long", 'l', 0, "show a long list with more detailed information", 0, 0},
  37     {"human-readable", 'h', 0, "print sizes in a human readable format", 0, 0},
  38     {"all", 'a', 0, "list all files", 0, 0},
  39     {0, 0, 0, 0, 0, 0}
  40   };
  41
  42 static const char grub_human_sizes[] = {' ', 'K', 'M', 'G', 'T'};
  43
  44 static grub_err_t
  45 grub_ls_list_devices (int longlist)
  46 {
  47   auto int grub_ls_print_devices (const char *name);
  48   int grub_ls_print_devices (const char *name)
  49     {
  50       if (longlist)
  51         grub_normal_print_device_info (name);
  52       else
  53         grub_printf ("(%s) ", name);
  54
  55       return 0;
  56     }
  57
  58   grub_device_iterate (grub_ls_print_devices);
  59   grub_putchar ('\n');
  60   grub_refresh ();
  61
  62   return 0;
  63 }
  64
  65 static grub_err_t
  66 grub_ls_list_files (char *dirname, int longlist, int all, int human)
  67 {
  68   char *device_name;
  69   grub_fs_t fs;
  70   const char *path;
  71   grub_device_t dev;
  72   auto int print_files (const char *filename, int dir);
  73   auto int print_files_long (const char *filename, int dir);
  74
  75   int print_files (const char *filename, int dir)
  76     {
  77       if (all || filename[0] != '.')
  78         grub_printf ("%s%s ", filename, dir ? "/" : "");
  79
  80       return 0;
  81     }
  82
  83   int print_files_long (const char *filename, int dir)
  84     {
  85       char pathname[grub_strlen (dirname) + grub_strlen (filename) + 1];
  86
  87       if ((! all) && (filename[0] == '.'))
  88         return 0;
  89
  90       if (! dir)
  91         {
  92           grub_file_t file;
  93
  94           if (dirname[grub_strlen (dirname) - 1] == '/')
  95             grub_sprintf (pathname, "%s%s", dirname, filename);
  96           else
  97             grub_sprintf (pathname, "%s/%s", dirname, filename);
  98
  99           /* XXX: For ext2fs symlinks are detected as files while they
 100              should be reported as directories.  */
 101           file = grub_file_open (pathname);
 102           if (! file)
 103             {
 104               grub_errno = 0;
 105               return 0;
 106             }
 107
 108           if (! human)
 109             grub_printf ("%-12d", file->size);
 110           else
 111             {
 112               float fsize = file->size;
 113               int fsz = file->size;
 114               int units = 0;
 115               char buf[20];
 116
 117               while (fsz / 1024)
 118                 {
 119                   fsize /= 1024;
 120                   fsz /= 1024;
 121                   units++;
 122                 }
 123
 124               if (units)
 125                 {
 126                   grub_sprintf (buf, "%0.2f%c", fsize, grub_human_sizes[units]);
 127                   grub_printf ("%-12s", buf);
 128                 }
 129               else
 130                 grub_printf ("%-12d", file->size);
 131
 132             }
 133           grub_file_close (file);
 134         }
 135       else
 136         grub_printf ("%-12s", "DIR");
 137
 138       grub_printf ("%s%s\n", filename, dir ? "/" : "");
 139
 140       return 0;
 141     }
 142
 143   device_name = grub_file_get_device_name (dirname);
 144   dev = grub_device_open (device_name);
 145   if (! dev)
 146     goto fail;
 147
 148   fs = grub_fs_probe (dev);
 149   path = grub_strchr (dirname, ')');
 150   if (! path)
 151     path = dirname;
 152   else
 153     path++;
 154
 155   if (! path && ! device_name)
 156     {
 157       grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
 158       goto fail;
 159     }
 160
 161   if (! *path)
 162     {
 163       if (grub_errno == GRUB_ERR_UNKNOWN_FS)
 164         grub_errno = GRUB_ERR_NONE;
 165
 166       grub_normal_print_device_info (device_name);
 167     }
 168   else if (fs)
 169     {
 170       if (longlist)
 171         (fs->dir) (dev, path, print_files_long);
 172       else
 173         (fs->dir) (dev, path, print_files);
 174
 175       if (grub_errno == GRUB_ERR_BAD_FILE_TYPE
 176           && path[grub_strlen (path) - 1] != '/')
 177         {
 178           /* PATH might be a regular file.  */
 179           char *p;
 180           grub_file_t file;
 181
 182           grub_errno = 0;
 183
 184           file = grub_file_open (dirname);
 185           if (! file)
 186             goto fail;
 187
 188           grub_file_close (file);
 189
 190           p = grub_strrchr (dirname, '/') + 1;
 191           dirname = grub_strndup (dirname, p - dirname);
 192           if (! dirname)
 193             goto fail;
 194
 195           all = 1;
 196           if (longlist)
 197             print_files_long (p, 0);
 198           else
 199             print_files (p, 0);
 200
 201           grub_free (dirname);
 202         }
 203
 204       if (grub_errno == GRUB_ERR_NONE)
 205         grub_putchar ('\n');
 206
 207       grub_refresh ();
 208     }
 209
 210  fail:
 211   if (dev)
 212     grub_device_close (dev);
 213
 214   grub_free (device_name);
 215
 216   return 0;
 217 }
 218
 219 static grub_err_t
 220 grub_cmd_ls (struct grub_arg_list *state, int argc, char **args)
 221 {
 222   if (argc == 0)
 223     grub_ls_list_devices (state[0].set);
 224   else
 225     grub_ls_list_files (args[0], state[0].set, state[2].set,
 226                         state[1].set);
 227
 228   return 0;
 229 }
 230
 231 GRUB_MOD_INIT(ls)
 232 {
 233   (void)mod;                    /* To stop warning. */
 234   grub_register_command ("ls", grub_cmd_ls, GRUB_COMMAND_FLAG_BOTH,
 235                          "ls [-l|-h|-a] [FILE]",
 236                          "List devices and files.", options);
 237 }
 238
 239 GRUB_MOD_FINI(ls)
 240 {
 241   grub_unregister_command ("ls");
 242 }