/* keystatus.c - Command to check key modifier status. */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2009 Free Software Foundation, Inc. * * GRUB 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 3 of the License, or * (at your option) any later version. * * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. */ #include <grub/dl.h> #include <grub/misc.h> #include <grub/extcmd.h> #include <grub/term.h> #include <grub/i18n.h> static const struct grub_arg_option options[] = { {"shift", 's', 0, N_("Check Shift key."), 0, 0}, {"ctrl", 'c', 0, N_("Check Control key."), 0, 0}, {"alt", 'a', 0, N_("Check Alt key."), 0, 0}, {0, 0, 0, 0, 0, 0} }; #define grub_cur_term_input grub_term_get_current_input () static grub_err_t grub_cmd_keystatus (grub_extcmd_t cmd, int argc __attribute__ ((unused)), char **args __attribute__ ((unused))) { struct grub_arg_list *state = cmd->state; int expect_mods = 0; int mods; if (state[0].set) expect_mods |= GRUB_TERM_STATUS_SHIFT; if (state[1].set) expect_mods |= GRUB_TERM_STATUS_CTRL; if (state[2].set) expect_mods |= GRUB_TERM_STATUS_ALT; grub_dprintf ("keystatus", "expect_mods: %d\n", expect_mods); /* Without arguments, just check whether getkeystatus is supported at all. */ if (expect_mods == 0) { grub_term_input_t term; int nterms = 0; FOR_ACTIVE_TERM_INPUTS (term) if (!term->getkeystatus) return grub_error (GRUB_ERR_TEST_FAILURE, "false"); else nterms++; if (!nterms) return grub_error (GRUB_ERR_TEST_FAILURE, "false"); return 0; } mods = grub_getkeystatus (); grub_dprintf ("keystatus", "mods: %d\n", mods); if (mods >= 0 && (mods & expect_mods) != 0) return 0; else return grub_error (GRUB_ERR_TEST_FAILURE, "false"); } static grub_extcmd_t cmd; GRUB_MOD_INIT(keystatus) { cmd = grub_register_extcmd ("keystatus", grub_cmd_keystatus, GRUB_COMMAND_FLAG_BOTH, N_("[--shift] [--ctrl] [--alt]"), N_("Check key modifier status."), options); } GRUB_MOD_FINI(keystatus) { grub_unregister_extcmd (cmd); }