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-rw-r--r--grub-core/commands/i386/pc/sendkey.c387
1 files changed, 387 insertions, 0 deletions
diff --git a/grub-core/commands/i386/pc/sendkey.c b/grub-core/commands/i386/pc/sendkey.c
new file mode 100644
index 0000000..26d9acd
--- /dev/null
+++ b/grub-core/commands/i386/pc/sendkey.c
@@ -0,0 +1,387 @@
+/* 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 <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/extcmd.h>
+#include <grub/cpu/io.h>
+#include <grub/loader.h>
+#include <grub/i18n.h>
+
+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;
+}
+
+/* Helper for grub_cmd_sendkey. */
+static int
+find_key_code (char *key)
+{
+ unsigned i;
+
+ for (i = 0; i < ARRAY_SIZE(keysym_table); 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;
+}
+
+/* Helper for grub_cmd_sendkey. */
+static int
+find_ascii_code (char *key)
+{
+ unsigned i;
+
+ for (i = 0; i < ARRAY_SIZE(keysym_table); 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;
+}
+
+static grub_err_t
+grub_cmd_sendkey (grub_extcmd_context_t ctxt, int argc, char **args)
+{
+ struct grub_arg_list *state = ctxt->state;
+
+ 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 < ARRAY_SIZE(simple_flag_offsets); i++)
+ grub_sendkey_set_simple_flag (simple_flag_offsets[i],
+ grub_sendkey_parse_op(state[i]));
+ }
+
+ /* Set noled. */
+ noled = (state[ARRAY_SIZE(simple_flag_offsets)].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 sequence"), 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-05 05:15:23 +0000