| /* cat.c - command to show the contents of a file */ |
| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2003,2005,2007,2008 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 <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <grub/dl.h> |
| #include <grub/file.h> |
| #include <grub/disk.h> |
| #include <grub/term.h> |
| #include <grub/misc.h> |
| #include <grub/gzio.h> |
| #include <grub/command.h> |
| |
| static grub_err_t |
| grub_cmd_cat (grub_command_t cmd __attribute__ ((unused)), |
| int argc, char **args) |
| |
| { |
| grub_file_t file; |
| char buf[GRUB_DISK_SECTOR_SIZE]; |
| grub_ssize_t size; |
| int key = 0; |
| |
| if (argc != 1) |
| return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required"); |
| |
| file = grub_gzfile_open (args[0], 1); |
| if (! file) |
| return 0; |
| |
| while ((size = grub_file_read (file, buf, sizeof (buf))) > 0 |
| && key != GRUB_TERM_ESC) |
| { |
| int i; |
| |
| for (i = 0; i < size; i++) |
| { |
| unsigned char c = buf[i]; |
| |
| if ((grub_isprint (c) || grub_isspace (c)) && c != '\r') |
| grub_putchar (c); |
| else |
| { |
| grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); |
| grub_printf ("<%x>", (int) c); |
| grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); |
| } |
| } |
| |
| while (grub_checkkey () >= 0 && |
| (key = GRUB_TERM_ASCII_CHAR (grub_getkey ())) != GRUB_TERM_ESC) |
| ; |
| } |
| |
| grub_putchar ('\n'); |
| grub_refresh (); |
| grub_file_close (file); |
| |
| return 0; |
| } |
| |
| static grub_command_t cmd; |
| |
| GRUB_MOD_INIT(cat) |
| { |
| cmd = grub_register_command_p1 ("cat", grub_cmd_cat, |
| "cat FILE", "Show the contents of a file."); |
| } |
| |
| GRUB_MOD_FINI(cat) |
| { |
| grub_unregister_command (cmd); |
| } |