commands/ls.c

   1 /* ls.c - command to list files and devices */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2003,2005,2007,2008  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 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/types.h>
  21 #include <grub/misc.h>
  22 #include <grub/mm.h>
  23 #include <grub/err.h>
  24 #include <grub/dl.h>
  25 #include <grub/disk.h>
  26 #include <grub/device.h>
  27 #include <grub/term.h>
  28 #include <grub/partition.h>
  29 #include <grub/file.h>
  30 #include <grub/normal.h>
  31 #include <grub/extcmd.h>
  32 #include <grub/datetime.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
  73   auto int print_files (const char *filename,
  74                         const struct grub_dirhook_info *info);
  75   auto int print_files_long (const char *filename,
  76                              const struct grub_dirhook_info *info);
  77
  78   int print_files (const char *filename, const struct grub_dirhook_info *info)
  79     {
  80       if (all || filename[0] != '.')
  81         grub_printf ("%s%s ", filename, info->dir ? "/" : "");
  82
  83       return 0;
  84     }
  85
  86   int print_files_long (const char *filename,
  87                         const struct grub_dirhook_info *info)
  88     {
  89       char pathname[grub_strlen (dirname) + grub_strlen (filename) + 1];
  90
  91       if ((! all) && (filename[0] == '.'))
  92         return 0;
  93
  94       if (! info->dir)
  95         {
  96           grub_file_t file;
  97
  98           if (dirname[grub_strlen (dirname) - 1] == '/')
  99             grub_sprintf (pathname, "%s%s", dirname, filename);
 100           else
 101             grub_sprintf (pathname, "%s/%s", dirname, filename);
 102
 103           /* XXX: For ext2fs symlinks are detected as files while they
 104              should be reported as directories.  */
 105           file = grub_file_open (pathname);
 106           if (! file)
 107             {
 108               grub_errno = 0;
 109               return 0;
 110             }
 111
 112           if (! human)
 113             grub_printf ("%-12llu", (unsigned long long) file->size);
 114           else
 115             {
 116               grub_uint64_t fsize = file->size * 100ULL;
 117               int fsz = file->size;
 118               int units = 0;
 119               char buf[20];
 120
 121               while (fsz / 1024)
 122                 {
 123                   fsize = (fsize + 512) / 1024;
 124                   fsz /= 1024;
 125                   units++;
 126                 }
 127
 128               if (units)
 129                 {
 130                   grub_uint32_t whole, fraction;
 131
 132                   whole = grub_divmod64 (fsize, 100, &fraction);
 133                   grub_sprintf (buf, "%u.%02u%c", whole, fraction,
 134                                 grub_human_sizes[units]);
 135                   grub_printf ("%-12s", buf);
 136                 }
 137               else
 138                 grub_printf ("%-12llu", (unsigned long long) file->size);
 139
 140             }
 141           grub_file_close (file);
 142         }
 143       else
 144         grub_printf ("%-12s", "DIR");
 145
 146       if (info->mtimeset)
 147         {
 148           struct grub_datetime datetime;
 149           grub_unixtime2datetime (info->mtime, &datetime);
 150           if (human)
 151             grub_printf (" %d-%02d-%02d %02d:%02d:%02d %-11s ",
 152                          datetime.year, datetime.month, datetime.day,
 153                          datetime.hour, datetime.minute,
 154                          datetime.second,
 155                          grub_get_weekday_name (&datetime));
 156           else
 157             grub_printf (" %04d%02d%02d%02d%02d%02d ",
 158                          datetime.year, datetime.month,
 159                          datetime.day, datetime.hour,
 160                          datetime.minute, datetime.second);
 161         }
 162       grub_printf ("%s%s\n", filename, info->dir ? "/" : "");
 163
 164       return 0;
 165     }
 166
 167   device_name = grub_file_get_device_name (dirname);
 168   dev = grub_device_open (device_name);
 169   if (! dev)
 170     goto fail;
 171
 172   fs = grub_fs_probe (dev);
 173   path = grub_strchr (dirname, ')');
 174   if (! path)
 175     path = dirname;
 176   else
 177     path++;
 178
 179   if (! path && ! device_name)
 180     {
 181       grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
 182       goto fail;
 183     }
 184
 185   if (! *path)
 186     {
 187       if (grub_errno == GRUB_ERR_UNKNOWN_FS)
 188         grub_errno = GRUB_ERR_NONE;
 189
 190       grub_normal_print_device_info (device_name);
 191     }
 192   else if (fs)
 193     {
 194       if (longlist)
 195         (fs->dir) (dev, path, print_files_long);
 196       else
 197         (fs->dir) (dev, path, print_files);
 198
 199       if (grub_errno == GRUB_ERR_BAD_FILE_TYPE
 200           && path[grub_strlen (path) - 1] != '/')
 201         {
 202           /* PATH might be a regular file.  */
 203           char *p;
 204           grub_file_t file;
 205           struct grub_dirhook_info info;
 206           grub_errno = 0;
 207
 208           file = grub_file_open (dirname);
 209           if (! file)
 210             goto fail;
 211
 212           grub_file_close (file);
 213
 214           p = grub_strrchr (dirname, '/') + 1;
 215           dirname = grub_strndup (dirname, p - dirname);
 216           if (! dirname)
 217             goto fail;
 218
 219           all = 1;
 220           grub_memset (&info, 0, sizeof (info));
 221           if (longlist)
 222             print_files_long (p, &info);
 223           else
 224             print_files (p, &info);
 225
 226           grub_free (dirname);
 227         }
 228
 229       if (grub_errno == GRUB_ERR_NONE)
 230         grub_putchar ('\n');
 231
 232       grub_refresh ();
 233     }
 234
 235  fail:
 236   if (dev)
 237     grub_device_close (dev);
 238
 239   grub_free (device_name);
 240
 241   return 0;
 242 }
 243
 244 static grub_err_t
 245 grub_cmd_ls (grub_extcmd_t cmd, int argc, char **args)
 246 {
 247   struct grub_arg_list *state = cmd->state;
 248
 249   if (argc == 0)
 250     grub_ls_list_devices (state[0].set);
 251   else
 252     grub_ls_list_files (args[0], state[0].set, state[2].set,
 253                         state[1].set);
 254
 255   return 0;
 256 }
 257
 258 static grub_extcmd_t cmd;
 259
 260 GRUB_MOD_INIT(ls)
 261 {
 262   cmd = grub_register_extcmd ("ls", grub_cmd_ls, GRUB_COMMAND_FLAG_BOTH,
 263                               "ls [-l|-h|-a] [FILE]",
 264                               "List devices and files.", options);
 265 }
 266
 267 GRUB_MOD_FINI(ls)
 268 {
 269   grub_unregister_extcmd (cmd);
 270 }