/* sendkey.c - fake keystroke. */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2009 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include GRUB_MOD_LICENSE ("GPLv2+"); static char sendkey[0x20]; /* Length of sendkey. */ static int keylen = 0; static int noled = 0; static const struct grub_arg_option options[] = { {"num", 'n', 0, N_("set numlock mode"), "[on|off]", ARG_TYPE_STRING}, {"caps", 'c', 0, N_("set capslock mode"), "[on|off]", ARG_TYPE_STRING}, {"scroll", 's', 0, N_("set scrolllock mode"), "[on|off]", ARG_TYPE_STRING}, {"insert", 0, 0, N_("set insert mode"), "[on|off]", ARG_TYPE_STRING}, {"pause", 0, 0, N_("set pause mode"), "[on|off]", ARG_TYPE_STRING}, {"left-shift", 0, 0, N_("press left shift"), "[on|off]", ARG_TYPE_STRING}, {"right-shift", 0, 0, N_("press right shift"), "[on|off]", ARG_TYPE_STRING}, {"sysrq", 0, 0, N_("press SysRq"), "[on|off]", ARG_TYPE_STRING}, {"numkey", 0, 0, N_("press NumLock key"), "[on|off]", ARG_TYPE_STRING}, {"capskey", 0, 0, N_("press CapsLock key"), "[on|off]", ARG_TYPE_STRING}, {"scrollkey", 0, 0, N_("press ScrollLock key"), "[on|off]", ARG_TYPE_STRING}, {"insertkey", 0, 0, N_("press Insert key"), "[on|off]", ARG_TYPE_STRING}, {"left-alt", 0, 0, N_("press left alt"), "[on|off]", ARG_TYPE_STRING}, {"right-alt", 0, 0, N_("press right alt"), "[on|off]", ARG_TYPE_STRING}, {"left-ctrl", 0, 0, N_("press left ctrl"), "[on|off]", ARG_TYPE_STRING}, {"right-ctrl", 0, 0, N_("press right ctrl"), "[on|off]", ARG_TYPE_STRING}, {"no-led", 0, 0, N_("don't update LED state"), 0, 0}, {0, 0, 0, 0, 0, 0} }; static int simple_flag_offsets[] = {5, 6, 4, 7, 11, 1, 0, 10, 13, 14, 12, 15, 9, 3, 8, 2}; static grub_uint32_t andmask = 0xffffffff, ormask = 0; struct keysym { const char *unshifted_name; /* the name in unshifted state */ const char *shifted_name; /* the name in shifted state */ unsigned char unshifted_ascii; /* the ascii code in unshifted state */ unsigned char shifted_ascii; /* the ascii code in shifted state */ unsigned char keycode; /* keyboard scancode */ }; /* The table for key symbols. If the "shifted" member of an entry is NULL, the entry does not have shifted state. Copied from GRUB Legacy setkey fuction */ static struct keysym keysym_table[] = { {"escape", 0, 0x1b, 0, 0x01}, {"1", "exclam", '1', '!', 0x02}, {"2", "at", '2', '@', 0x03}, {"3", "numbersign", '3', '#', 0x04}, {"4", "dollar", '4', '$', 0x05}, {"5", "percent", '5', '%', 0x06}, {"6", "caret", '6', '^', 0x07}, {"7", "ampersand", '7', '&', 0x08}, {"8", "asterisk", '8', '*', 0x09}, {"9", "parenleft", '9', '(', 0x0a}, {"0", "parenright", '0', ')', 0x0b}, {"minus", "underscore", '-', '_', 0x0c}, {"equal", "plus", '=', '+', 0x0d}, {"backspace", 0, '\b', 0, 0x0e}, {"tab", 0, '\t', 0, 0x0f}, {"q", "Q", 'q', 'Q', 0x10}, {"w", "W", 'w', 'W', 0x11}, {"e", "E", 'e', 'E', 0x12}, {"r", "R", 'r', 'R', 0x13}, {"t", "T", 't', 'T', 0x14}, {"y", "Y", 'y', 'Y', 0x15}, {"u", "U", 'u', 'U', 0x16}, {"i", "I", 'i', 'I', 0x17}, {"o", "O", 'o', 'O', 0x18}, {"p", "P", 'p', 'P', 0x19}, {"bracketleft", "braceleft", '[', '{', 0x1a}, {"bracketright", "braceright", ']', '}', 0x1b}, {"enter", 0, '\r', 0, 0x1c}, {"control", 0, 0, 0, 0x1d}, {"a", "A", 'a', 'A', 0x1e}, {"s", "S", 's', 'S', 0x1f}, {"d", "D", 'd', 'D', 0x20}, {"f", "F", 'f', 'F', 0x21}, {"g", "G", 'g', 'G', 0x22}, {"h", "H", 'h', 'H', 0x23}, {"j", "J", 'j', 'J', 0x24}, {"k", "K", 'k', 'K', 0x25}, {"l", "L", 'l', 'L', 0x26}, {"semicolon", "colon", ';', ':', 0x27}, {"quote", "doublequote", '\'', '"', 0x28}, {"backquote", "tilde", '`', '~', 0x29}, {"shift", 0, 0, 0, 0x2a}, {"backslash", "bar", '\\', '|', 0x2b}, {"z", "Z", 'z', 'Z', 0x2c}, {"x", "X", 'x', 'X', 0x2d}, {"c", "C", 'c', 'C', 0x2e}, {"v", "V", 'v', 'V', 0x2f}, {"b", "B", 'b', 'B', 0x30}, {"n", "N", 'n', 'N', 0x31}, {"m", "M", 'm', 'M', 0x32}, {"comma", "less", ',', '<', 0x33}, {"period", "greater", '.', '>', 0x34}, {"slash", "question", '/', '?', 0x35}, {"rshift", 0, 0, 0, 0x36}, {"numasterisk", 0, '*', 0, 0x37}, {"alt", 0, 0, 0, 0x38}, {"space", 0, ' ', 0, 0x39}, {"capslock", 0, 0, 0, 0x3a}, {"F1", 0, 0, 0, 0x3b}, {"F2", 0, 0, 0, 0x3c}, {"F3", 0, 0, 0, 0x3d}, {"F4", 0, 0, 0, 0x3e}, {"F5", 0, 0, 0, 0x3f}, {"F6", 0, 0, 0, 0x40}, {"F7", 0, 0, 0, 0x41}, {"F8", 0, 0, 0, 0x42}, {"F9", 0, 0, 0, 0x43}, {"F10", 0, 0, 0, 0x44}, {"num7", "numhome", '7', 0, 0x47}, {"num8", "numup", '8', 0, 0x48}, {"num9", "numpgup", '9', 0, 0x49}, {"numminus", 0, '-', 0, 0x4a}, {"num4", "numleft", '4', 0, 0x4b}, {"num5", "numcenter", '5', 0, 0x4c}, {"num6", "numright", '6', 0, 0x4d}, {"numplus", 0, '-', 0, 0x4e}, {"num1", "numend", '1', 0, 0x4f}, {"num2", "numdown", '2', 0, 0x50}, {"num3", "numpgdown", '3', 0, 0x51}, {"num0", "numinsert", '0', 0, 0x52}, {"numperiod", "numdelete", 0, 0x7f, 0x53}, {"F11", 0, 0, 0, 0x57}, {"F12", 0, 0, 0, 0x58}, {"numenter", 0, '\r', 0, 0xe0}, {"numslash", 0, '/', 0, 0xe0}, {"delete", 0, 0x7f, 0, 0xe0}, {"insert", 0, 0xe0, 0, 0x52}, {"home", 0, 0xe0, 0, 0x47}, {"end", 0, 0xe0, 0, 0x4f}, {"pgdown", 0, 0xe0, 0, 0x51}, {"pgup", 0, 0xe0, 0, 0x49}, {"down", 0, 0xe0, 0, 0x50}, {"up", 0, 0xe0, 0, 0x48}, {"left", 0, 0xe0, 0, 0x4b}, {"right", 0, 0xe0, 0, 0x4d} }; /* Set a simple flag in flags variable OUTOFFSET - offset of flag in FLAGS, OP - action id */ static void grub_sendkey_set_simple_flag (int outoffset, int op) { if (op == 2) { andmask |= (1 << outoffset); ormask &= ~(1 << outoffset); } else { andmask &= (~(1 << outoffset)); if (op == 1) ormask |= (1 << outoffset); else ormask &= ~(1 << outoffset); } } static int grub_sendkey_parse_op (struct grub_arg_list state) { if (! state.set) return 2; if (grub_strcmp (state.arg, "off") == 0 || grub_strcmp (state.arg, "0") == 0 || grub_strcmp (state.arg, "unpress") == 0) return 0; if (grub_strcmp (state.arg, "on") == 0 || grub_strcmp (state.arg, "1") == 0 || grub_strcmp (state.arg, "press") == 0) return 1; return 2; } static grub_uint32_t oldflags; static grub_err_t grub_sendkey_postboot (void) { /* For convention: pointer to flags. */ grub_uint32_t *flags = (grub_uint32_t *) 0x417; *flags = oldflags; *((char *) 0x41a) = 0x1e; *((char *) 0x41c) = 0x1e; return GRUB_ERR_NONE; } /* Set keyboard buffer to our sendkey */ static grub_err_t grub_sendkey_preboot (int noret __attribute__ ((unused))) { /* For convention: pointer to flags. */ grub_uint32_t *flags = (grub_uint32_t *) 0x417; oldflags = *flags; /* Set the sendkey. */ *((char *) 0x41a) = 0x1e; *((char *) 0x41c) = keylen + 0x1e; grub_memcpy ((char *) 0x41e, sendkey, 0x20); /* Transform "any ctrl" to "right ctrl" flag. */ if (*flags & (1 << 8)) *flags &= ~(1 << 2); /* Transform "any alt" to "right alt" flag. */ if (*flags & (1 << 9)) *flags &= ~(1 << 3); *flags = (*flags & andmask) | ormask; /* Transform "right ctrl" to "any ctrl" flag. */ if (*flags & (1 << 8)) *flags |= (1 << 2); /* Transform "right alt" to "any alt" flag. */ if (*flags & (1 << 9)) *flags |= (1 << 3); /* Write new LED state */ if (!noled) { int value = 0; int failed; /* Try 5 times */ for (failed = 0; failed < 5; failed++) { value = 0; /* Send command change LEDs */ grub_outb (0xed, 0x60); /* Wait */ do value = grub_inb (0x60); while ((value != 0xfa) && (value != 0xfe)); if (value == 0xfa) { /* Set new LEDs*/ grub_outb ((*flags >> 4) & 7, 0x60); break; } } } return GRUB_ERR_NONE; } static grub_err_t grub_cmd_sendkey (grub_extcmd_context_t ctxt, int argc, char **args) { struct grub_arg_list *state = ctxt->state; auto int find_key_code (char *key); auto int find_ascii_code (char *key); int find_key_code (char *key) { unsigned i; for (i = 0; i < sizeof (keysym_table) / sizeof (keysym_table[0]); i++) { if (keysym_table[i].unshifted_name && grub_strcmp (key, keysym_table[i].unshifted_name) == 0) return keysym_table[i].keycode; else if (keysym_table[i].shifted_name && grub_strcmp (key, keysym_table[i].shifted_name) == 0) return keysym_table[i].keycode; } return 0; } int find_ascii_code (char *key) { unsigned i; for (i = 0; i < sizeof (keysym_table) / sizeof (keysym_table[0]); i++) { if (keysym_table[i].unshifted_name && grub_strcmp (key, keysym_table[i].unshifted_name) == 0) return keysym_table[i].unshifted_ascii; else if (keysym_table[i].shifted_name && grub_strcmp (key, keysym_table[i].shifted_name) == 0) return keysym_table[i].shifted_ascii; } return 0; } andmask = 0xffffffff; ormask = 0; { int i; keylen = 0; for (i = 0; i < argc && keylen < 0x20; i++) { int key_code; key_code = find_key_code (args[i]); if (key_code) { sendkey[keylen++] = find_ascii_code (args[i]); sendkey[keylen++] = key_code; } } } { unsigned i; for (i = 0; i < sizeof (simple_flag_offsets) / sizeof (simple_flag_offsets[0]); i++) grub_sendkey_set_simple_flag (simple_flag_offsets[i], grub_sendkey_parse_op(state[i])); } /* Set noled. */ noled = (state[sizeof (simple_flag_offsets) / sizeof (simple_flag_offsets[0])].set); return GRUB_ERR_NONE; } static grub_extcmd_t cmd; static struct grub_preboot *preboot_hook; GRUB_MOD_INIT (sendkey) { cmd = grub_register_extcmd ("sendkey", grub_cmd_sendkey, 0, N_("[KEYSTROKE1] [KEYSTROKE2] ..."), /* TRANSLATORS: It can emulate multiple keypresses. */ N_("Emulate a keystroke"), options); preboot_hook = grub_loader_register_preboot_hook (grub_sendkey_preboot, grub_sendkey_postboot, GRUB_LOADER_PREBOOT_HOOK_PRIO_CONSOLE); } GRUB_MOD_FINI (sendkey) { grub_unregister_extcmd (cmd); grub_loader_unregister_preboot_hook (preboot_hook); }