commands/ls.c

   1 /* ls.c - command to list files and devices */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2003,2005,2007,2008,2009  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 #include <grub/i18n.h>
  34
  35 static const struct grub_arg_option options[] =
  36   {
  37     {"long", 'l', 0, N_("Show a long list with more detailed information."), 0, 0},
  38     {"human-readable", 'h', 0, N_("Print sizes in a human readable format."), 0, 0},
  39     {"all", 'a', 0, N_("List all files."), 0, 0},
  40     {0, 0, 0, 0, 0, 0}
  41   };
  42
  43 static const char grub_human_sizes[] = {' ', 'K', 'M', 'G', 'T'};
  44
  45 static grub_err_t
  46 grub_ls_list_devices (int longlist)
  47 {
  48   auto int grub_ls_print_devices (const char *name);
  49   int grub_ls_print_devices (const char *name)
  50     {
  51       if (longlist)
  52         grub_normal_print_device_info (name);
  53       else
  54         grub_printf ("(%s) ", name);
  55
  56       return 0;
  57     }
  58
  59   grub_device_iterate (grub_ls_print_devices);
  60   grub_xputs ("\n");
  61   grub_refresh ();
  62
  63   return 0;
  64 }
  65
  66 static grub_err_t
  67 grub_ls_list_files (char *dirname, int longlist, int all, int human)
  68 {
  69   char *device_name;
  70   grub_fs_t fs;
  71   const char *path;
  72   grub_device_t dev;
  73
  74   auto int print_files (const char *filename,
  75                         const struct grub_dirhook_info *info);
  76   auto int print_files_long (const char *filename,
  77                              const struct grub_dirhook_info *info);
  78
  79   int print_files (const char *filename, const struct grub_dirhook_info *info)
  80     {
  81       if (all || filename[0] != '.')
  82         grub_printf ("%s%s ", filename, info->dir ? "/" : "");
  83
  84       return 0;
  85     }
  86
  87   int print_files_long (const char *filename,
  88                         const struct grub_dirhook_info *info)
  89     {
  90       if ((! all) && (filename[0] == '.'))
  91         return 0;
  92
  93       if (! info->dir)
  94         {
  95           grub_file_t file;
  96           char *pathname;
  97
  98           if (dirname[grub_strlen (dirname) - 1] == '/')
  99             pathname = grub_xasprintf ("%s%s", dirname, filename);
 100           else
 101             pathname = grub_xasprintf ("%s/%s", dirname, filename);
 102
 103           if (!pathname)
 104             return 1;
 105
 106           /* XXX: For ext2fs symlinks are detected as files while they
 107              should be reported as directories.  */
 108           file = grub_file_open (pathname);
 109           if (! file)
 110             {
 111               grub_errno = 0;
 112               grub_free (pathname);
 113               return 0;
 114             }
 115
 116           if (! human)
 117             grub_printf ("%-12llu", (unsigned long long) file->size);
 118           else
 119             {
 120               grub_uint64_t fsize = file->size * 100ULL;
 121               int fsz = file->size;
 122               int units = 0;
 123               char buf[20];
 124
 125               while (fsz / 1024)
 126                 {
 127                   fsize = (fsize + 512) / 1024;
 128                   fsz /= 1024;
 129                   units++;
 130                 }
 131
 132               if (units)
 133                 {
 134                   grub_uint32_t whole, fraction;
 135
 136                   whole = grub_divmod64 (fsize, 100, &fraction);
 137                   grub_snprintf (buf, sizeof (buf),
 138                                  "%u.%02u%c", whole, fraction,
 139                                  grub_human_sizes[units]);
 140                   grub_printf ("%-12s", buf);
 141                 }
 142               else
 143                 grub_printf ("%-12llu", (unsigned long long) file->size);
 144
 145             }
 146           grub_file_close (file);
 147           grub_free (pathname);
 148         }
 149       else
 150         grub_printf ("%-12s", "DIR");
 151
 152       if (info->mtimeset)
 153         {
 154           struct grub_datetime datetime;
 155           grub_unixtime2datetime (info->mtime, &datetime);
 156           if (human)
 157             grub_printf (" %d-%02d-%02d %02d:%02d:%02d %-11s ",
 158                          datetime.year, datetime.month, datetime.day,
 159                          datetime.hour, datetime.minute,
 160                          datetime.second,
 161                          grub_get_weekday_name (&datetime));
 162           else
 163             grub_printf (" %04d%02d%02d%02d%02d%02d ",
 164                          datetime.year, datetime.month,
 165                          datetime.day, datetime.hour,
 166                          datetime.minute, datetime.second);
 167         }
 168       grub_printf ("%s%s\n", filename, info->dir ? "/" : "");
 169
 170       return 0;
 171     }
 172
 173   device_name = grub_file_get_device_name (dirname);
 174   dev = grub_device_open (device_name);
 175   if (! dev)
 176     goto fail;
 177
 178   fs = grub_fs_probe (dev);
 179   path = grub_strchr (dirname, ')');
 180   if (! path)
 181     path = dirname;
 182   else
 183     path++;
 184
 185   if (! path && ! device_name)
 186     {
 187       grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
 188       goto fail;
 189     }
 190
 191   if (! *path)
 192     {
 193       if (grub_errno == GRUB_ERR_UNKNOWN_FS)
 194         grub_errno = GRUB_ERR_NONE;
 195
 196       grub_normal_print_device_info (device_name);
 197     }
 198   else if (fs)
 199     {
 200       if (longlist)
 201         (fs->dir) (dev, path, print_files_long);
 202       else
 203         (fs->dir) (dev, path, print_files);
 204
 205       if (grub_errno == GRUB_ERR_BAD_FILE_TYPE
 206           && path[grub_strlen (path) - 1] != '/')
 207         {
 208           /* PATH might be a regular file.  */
 209           char *p;
 210           grub_file_t file;
 211           struct grub_dirhook_info info;
 212           grub_errno = 0;
 213
 214           file = grub_file_open (dirname);
 215           if (! file)
 216             goto fail;
 217
 218           grub_file_close (file);
 219
 220           p = grub_strrchr (dirname, '/') + 1;
 221           dirname = grub_strndup (dirname, p - dirname);
 222           if (! dirname)
 223             goto fail;
 224
 225           all = 1;
 226           grub_memset (&info, 0, sizeof (info));
 227           if (longlist)
 228             print_files_long (p, &info);
 229           else
 230             print_files (p, &info);
 231
 232           grub_free (dirname);
 233         }
 234
 235       if (grub_errno == GRUB_ERR_NONE)
 236         grub_xputs ("\n");
 237
 238       grub_refresh ();
 239     }
 240
 241  fail:
 242   if (dev)
 243     grub_device_close (dev);
 244
 245   grub_free (device_name);
 246
 247   return 0;
 248 }
 249
 250 static grub_err_t
 251 grub_cmd_ls (grub_extcmd_t cmd, int argc, char **args)
 252 {
 253   struct grub_arg_list *state = cmd->state;
 254
 255   if (argc == 0)
 256     grub_ls_list_devices (state[0].set);
 257   else
 258     grub_ls_list_files (args[0], state[0].set, state[2].set,
 259                         state[1].set);
 260
 261   return 0;
 262 }
 263
 264 static grub_extcmd_t cmd;
 265
 266 GRUB_MOD_INIT(ls)
 267 {
 268   cmd = grub_register_extcmd ("ls", grub_cmd_ls, GRUB_COMMAND_FLAG_BOTH,
 269                               N_("[-l|-h|-a] [FILE]"),
 270                               N_("List devices and files."), options);
 271 }
 272
 273 GRUB_MOD_FINI(ls)
 274 {
 275   grub_unregister_extcmd (cmd);
 276 }