commands/ls.c

   1 /* ls.c - command to list files and devices */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2003,2005,2007  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/normal.h>
  26 #include <grub/arg.h>
  27 #include <grub/disk.h>
  28 #include <grub/device.h>
  29 #include <grub/term.h>
  30 #include <grub/partition.h>
  31 #include <grub/file.h>
  32
  33 static const struct grub_arg_option options[] =
  34   {
  35     {"long", 'l', 0, "show a long list with more detailed information", 0, 0},
  36     {"human-readable", 'h', 0, "print sizes in a human readable format", 0, 0},
  37     {"all", 'a', 0, "list all files", 0, 0},
  38     {0, 0, 0, 0, 0, 0}
  39   };
  40
  41 static const char grub_human_sizes[] = {' ', 'K', 'M', 'G', 'T'};
  42
  43 static grub_err_t
  44 grub_ls_list_devices (int longlist)
  45 {
  46   auto int grub_ls_print_devices (const char *name);
  47   int grub_ls_print_devices (const char *name)
  48     {
  49       if (longlist)
  50         grub_normal_print_device_info (name);
  51       else
  52         grub_printf ("(%s) ", name);
  53
  54       return 0;
  55     }
  56
  57   grub_device_iterate (grub_ls_print_devices);
  58   grub_putchar ('\n');
  59   grub_refresh ();
  60
  61   return 0;
  62 }
  63
  64 static grub_err_t
  65 grub_ls_list_files (char *dirname, int longlist, int all, int human)
  66 {
  67   char *device_name;
  68   grub_fs_t fs;
  69   const char *path;
  70   grub_device_t dev;
  71   auto int print_files (const char *filename, int dir);
  72   auto int print_files_long (const char *filename, int dir);
  73
  74   int print_files (const char *filename, int dir)
  75     {
  76       if (all || filename[0] != '.')
  77         grub_printf ("%s%s ", filename, dir ? "/" : "");
  78
  79       return 0;
  80     }
  81
  82   int print_files_long (const char *filename, int dir)
  83     {
  84       char pathname[grub_strlen (dirname) + grub_strlen (filename) + 1];
  85
  86       if ((! all) && (filename[0] == '.'))
  87         return 0;
  88
  89       if (! dir)
  90         {
  91           grub_file_t file;
  92
  93           if (dirname[grub_strlen (dirname) - 1] == '/')
  94             grub_sprintf (pathname, "%s%s", dirname, filename);
  95           else
  96             grub_sprintf (pathname, "%s/%s", dirname, filename);
  97
  98           /* XXX: For ext2fs symlinks are detected as files while they
  99              should be reported as directories.  */
 100           file = grub_file_open (pathname);
 101           if (! file)
 102             {
 103               grub_errno = 0;
 104               return 0;
 105             }
 106
 107           if (! human)
 108             grub_printf ("%-12llu", (unsigned long long) file->size);
 109           else
 110             {
 111               grub_uint64_t fsize = file->size * 100ULL;
 112               int fsz = file->size;
 113               int units = 0;
 114               char buf[20];
 115
 116               while (fsz / 1024)
 117                 {
 118                   fsize = (fsize + 512) / 1024;
 119                   fsz /= 1024;
 120                   units++;
 121                 }
 122
 123               if (units)
 124                 {
 125                   grub_uint32_t whole, fraction;
 126
 127                   whole = grub_divmod64 (fsize, 100, &fraction);
 128                   grub_sprintf (buf, "%u.%02u%c", whole, fraction,
 129                                 grub_human_sizes[units]);
 130                   grub_printf ("%-12s", buf);
 131                 }
 132               else
 133                 grub_printf ("%-12llu", (unsigned long long) file->size);
 134
 135             }
 136           grub_file_close (file);
 137         }
 138       else
 139         grub_printf ("%-12s", "DIR");
 140
 141       grub_printf ("%s%s\n", filename, dir ? "/" : "");
 142
 143       return 0;
 144     }
 145
 146   device_name = grub_file_get_device_name (dirname);
 147   dev = grub_device_open (device_name);
 148   if (! dev)
 149     goto fail;
 150
 151   fs = grub_fs_probe (dev);
 152   path = grub_strchr (dirname, ')');
 153   if (! path)
 154     path = dirname;
 155   else
 156     path++;
 157
 158   if (! path && ! device_name)
 159     {
 160       grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
 161       goto fail;
 162     }
 163
 164   if (! *path)
 165     {
 166       if (grub_errno == GRUB_ERR_UNKNOWN_FS)
 167         grub_errno = GRUB_ERR_NONE;
 168
 169       grub_normal_print_device_info (device_name);
 170     }
 171   else if (fs)
 172     {
 173       if (longlist)
 174         (fs->dir) (dev, path, print_files_long);
 175       else
 176         (fs->dir) (dev, path, print_files);
 177
 178       if (grub_errno == GRUB_ERR_BAD_FILE_TYPE
 179           && path[grub_strlen (path) - 1] != '/')
 180         {
 181           /* PATH might be a regular file.  */
 182           char *p;
 183           grub_file_t file;
 184
 185           grub_errno = 0;
 186
 187           file = grub_file_open (dirname);
 188           if (! file)
 189             goto fail;
 190
 191           grub_file_close (file);
 192
 193           p = grub_strrchr (dirname, '/') + 1;
 194           dirname = grub_strndup (dirname, p - dirname);
 195           if (! dirname)
 196             goto fail;
 197
 198           all = 1;
 199           if (longlist)
 200             print_files_long (p, 0);
 201           else
 202             print_files (p, 0);
 203
 204           grub_free (dirname);
 205         }
 206
 207       if (grub_errno == GRUB_ERR_NONE)
 208         grub_putchar ('\n');
 209
 210       grub_refresh ();
 211     }
 212
 213  fail:
 214   if (dev)
 215     grub_device_close (dev);
 216
 217   grub_free (device_name);
 218
 219   return 0;
 220 }
 221
 222 static grub_err_t
 223 grub_cmd_ls (struct grub_arg_list *state, int argc, char **args)
 224 {
 225   if (argc == 0)
 226     grub_ls_list_devices (state[0].set);
 227   else
 228     grub_ls_list_files (args[0], state[0].set, state[2].set,
 229                         state[1].set);
 230
 231   return 0;
 232 }
 233
 234 GRUB_MOD_INIT(ls)
 235 {
 236   (void)mod;                    /* To stop warning. */
 237   grub_register_command ("ls", grub_cmd_ls, GRUB_COMMAND_FLAG_BOTH,
 238                          "ls [-l|-h|-a] [FILE]",
 239                          "List devices and files.", options);
 240 }
 241
 242 GRUB_MOD_FINI(ls)
 243 {
 244   grub_unregister_command ("ls");
 245 }