/* sleep.c - Command to wait a specified number of seconds. */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2006,2007,2008 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 . */ #include #include #include #include #include #include #include static const struct grub_arg_option options[] = { {"verbose", 'v', 0, N_("Verbose countdown."), 0, 0}, {"interruptible", 'i', 0, N_("Interruptible with ESC."), 0, 0}, {0, 0, 0, 0, 0, 0} }; static grub_uint16_t *pos; static void do_print (int n) { grub_term_restore_pos (pos); /* NOTE: Do not remove the trailing space characters. They are required to clear the line. */ grub_printf ("%d ", n); } /* Based on grub_millisleep() from kern/generic/millisleep.c. */ static int grub_interruptible_millisleep (grub_uint32_t ms) { grub_uint64_t start; start = grub_get_time_ms (); while (grub_get_time_ms () - start < ms) if (grub_checkkey () >= 0 && GRUB_TERM_ASCII_CHAR (grub_getkey ()) == GRUB_TERM_ESC) return 1; return 0; } static grub_err_t grub_cmd_sleep (grub_extcmd_context_t ctxt, int argc, char **args) { struct grub_arg_list *state = ctxt->state; int n; if (argc != 1) return grub_error (GRUB_ERR_BAD_ARGUMENT, "missing operand"); n = grub_strtoul (args[0], 0, 10); if (n == 0) { /* Either `0' or broken input. */ return 0; } pos = grub_term_save_pos (); for (; n; n--) { if (state[0].set) do_print (n); if (state[1].set) { if (grub_interruptible_millisleep (1000)) return 1; } else grub_millisleep (1000); } if (state[0].set) do_print (0); return 0; } static grub_extcmd_t cmd; GRUB_MOD_INIT(sleep) { cmd = grub_register_extcmd ("sleep", grub_cmd_sleep, GRUB_COMMAND_FLAG_BOTH, N_("NUMBER_OF_SECONDS"), N_("Wait for a specified number of seconds."), options); } GRUB_MOD_FINI(sleep) { grub_unregister_extcmd (cmd); }