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/* echo.c - Command to display a line of text */
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007 Free Software Foundation, Inc.
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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#include <grub/misc.h>
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#include <grub/extcmd.h>
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#include <grub/i18n.h>
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static const struct grub_arg_option options[] =
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{0, 'n', 0, N_("Do not output the trailing newline."), 0, 0},
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{0, 'e', 0, N_("Enable interpretation of backslash escapes."), 0, 0},
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grub_cmd_echo (grub_extcmd_context_t ctxt, int argc, char **args)
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struct grub_arg_list *state = ctxt->state;
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/* Check if `-n' was used. */
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for (i = 0; i < argc; i++)
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/* In case `-e' is used, parse backslashes. */
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if (*arg == '\\' && state[1].set)
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/* This was not an escaped character, or escaping is not
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grub_printf ("%c", *arg);
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/* If another argument follows, insert a space. */
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static grub_extcmd_t cmd;
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cmd = grub_register_extcmd ("echo", grub_cmd_echo,
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GRUB_COMMAND_ACCEPT_DASH
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| GRUB_COMMAND_OPTIONS_AT_START,
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N_("[-e|-n] STRING"), N_("Display a line of text."),
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grub_unregister_extcmd (cmd);