src/patches/grub-0.90-append.patch

   1 --- grub-0.90/stage2/stage2.c.append    Thu Dec 20 08:20:48 2001
   2 +++ grub-0.90/stage2/stage2.c   Thu Dec 20 17:01:20 2001
   3 @@ -500,7 +500,8 @@
   4           if (config_entries)
   5             printf ("\
   6        Press enter to boot the selected OS, \'e\' to edit the\n\
   7 -      commands before booting, or \'c\' for a command-line.");
   8 +      commands before booting, \'a\' to modify the kernel arguments\n\
   9 +      before booting, or \'c\' for a command-line.");
  10           else
  11             printf ("\
  12        Press \'b\' to boot, \'e\' to edit the selected command in the\n\
  13 @@ -787,6 +788,98 @@
  14                   enter_cmdline (heap, 0);
  15                   goto restart;
  16                 }
  17 +             if (config_entries && c == 'a')
  18 +               {
  19 +                 int new_num_entries = 0, i = 0, j;
  20 +                 int needs_padding, amount;
  21 +                 char *new_heap;
  22 +                 char * entries;
  23 +                 char * entry_copy;
  24 +                 char * append_line;
  25 +                 char * start;
  26 +
  27 +                 entry_copy = new_heap = heap;
  28 +                 cur_entry = get_entry (config_entries, first_entry + entryno,
  29 +                                        1);
  30 +
  31 +                 do
  32 +                   {
  33 +                     while ((*(new_heap++) = cur_entry[i++]) != 0);
  34 +                     new_num_entries++;
  35 +                   }
  36 +                 while (config_entries && cur_entry[i]);
  37 +
  38 +                 /* this only needs to be done if config_entries is non-NULL,
  39 +                    but it doesn't hurt to do it always */
  40 +                 *(new_heap++) = 0;
  41 +
  42 +                 new_heap = heap + NEW_HEAPSIZE + 1;
  43 +
  44 +                 entries = entry_copy;
  45 +                 while (*entries)
  46 +                   {
  47 +                     if ((strstr(entries, "kernel") == entries) &&
  48 +                         isspace(entries[6]))
  49 +                         break;
  50 +
  51 +                     while (*entries) entries++;
  52 +                     entries++;
  53 +                   }
  54 +
  55 +                 if (!*entries)
  56 +                     goto restart;
  57 +
  58 +                 start = entries + 6;
  59 +
  60 +                 /* skip the white space */
  61 +                 while (*start && isspace(*start)) start++;
  62 +                 /* skip the kernel name */
  63 +                 while (*start && !isspace(*start)) start++;
  64 +
  65 +                 /* skip the white space */
  66 +                 needs_padding = (!*start || !isspace(*start));
  67 +                 while (*start && isspace(*start)) start++;
  68 +
  69 +                 append_line = new_heap;
  70 +                 grub_strcpy(append_line, start);
  71 +
  72 +                 cls();
  73 +                 print_cmdline_message (CMDLINE_EDIT_MODE);
  74 +
  75 +                 if (get_cmdline(PACKAGE " append> ",
  76 +                                   append_line, NEW_HEAPSIZE + 1,
  77 +                                   0, 1))
  78 +                     goto restart;
  79 +
  80 +                 /* have new args; append_line points to the
  81 +                    new args and start points to the old
  82 +                    args */
  83 +
  84 +                 i = grub_strlen(start);
  85 +                 j = grub_strlen(append_line);
  86 +
  87 +                 if (i > (j + needs_padding))
  88 +                     amount = i;
  89 +                 else
  90 +                     amount = j + needs_padding;
  91 +
  92 +                 /* align rest of commands properly */
  93 +                 memmove (start + j + needs_padding, start + i,
  94 +                      ((int) append_line) - ((int) start) - (amount));
  95 +
  96 +                 if (needs_padding)
  97 +                     *start = ' ';
  98 +
  99 +                 /* copy command to correct area */
 100 +                 memmove (start + needs_padding, append_line, j);
 101 +
 102 +                 /* set up this entry to boot */
 103 +                 config_entries = NULL;
 104 +                 cur_entry = entry_copy;
 105 +                 heap = new_heap;
 106 +
 107 +                 break;
 108 +               }
 109  #ifdef GRUB_UTIL
 110               if (c == 'q')
 111                 {