diff options
Diffstat (limited to 'grub-core/commands/cat.c')
| -rw-r--r-- | grub-core/commands/cat.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/grub-core/commands/cat.c b/grub-core/commands/cat.c new file mode 100644 index 0000000..ba5f006 --- /dev/null +++ b/grub-core/commands/cat.c @@ -0,0 +1,170 @@ +/* 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/extcmd.h> +#include <grub/i18n.h> +#include <grub/charset.h> + +GRUB_MOD_LICENSE ("GPLv3+"); + +static const struct grub_arg_option options[] = + { + {"dos", -1, 0, N_("Accept DOS-style CR/NL line endings."), 0, 0}, + {0, 0, 0, 0, 0, 0} + }; + +static grub_err_t +grub_cmd_cat (grub_extcmd_context_t ctxt, int argc, char **args) +{ + struct grub_arg_list *state = ctxt->state; + int dos = 0; + grub_file_t file; + unsigned char buf[GRUB_DISK_SECTOR_SIZE]; + grub_ssize_t size; + int key = GRUB_TERM_NO_KEY; + grub_uint32_t code = 0; + int count = 0; + unsigned char utbuf[GRUB_MAX_UTF8_PER_CODEPOINT + 1]; + int utcount = 0; + int is_0d = 0; + int j; + + if (state[0].set) + dos = 1; + + if (argc != 1) + return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected")); + + file = grub_file_open (args[0], GRUB_FILE_TYPE_CAT); + if (! file) + return grub_errno; + + while ((size = grub_file_read (file, buf, sizeof (buf))) > 0 + && key != GRUB_TERM_ESC) + { + int i; + + for (i = 0; i < size; i++) + { + utbuf[utcount++] = buf[i]; + + if (is_0d && buf[i] != '\n') + { + grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); + grub_printf ("<%x>", (int) '\r'); + grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); + } + + is_0d = 0; + + if (!grub_utf8_process (buf[i], &code, &count)) + { + grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); + for (j = 0; j < utcount - 1; j++) + grub_printf ("<%x>", (unsigned int) utbuf[j]); + code = 0; + count = 0; + if (utcount == 1 || !grub_utf8_process (buf[i], &code, &count)) + { + grub_printf ("<%x>", (unsigned int) buf[i]); + code = 0; + count = 0; + utcount = 0; + grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); + continue; + } + grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); + utcount = 1; + } + if (count) + continue; + + if ((code >= 0xa1 || grub_isprint (code) + || grub_isspace (code)) && code != '\r') + { + grub_printf ("%C", code); + count = 0; + code = 0; + utcount = 0; + continue; + } + + if (dos && code == '\r') + { + is_0d = 1; + count = 0; + code = 0; + utcount = 0; + continue; + } + + grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); + for (j = 0; j < utcount; j++) + grub_printf ("<%x>", (unsigned int) utbuf[j]); + grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); + count = 0; + code = 0; + utcount = 0; + } + + do + key = grub_getkey_noblock (); + while (key != GRUB_TERM_ESC && key != GRUB_TERM_NO_KEY); + } + + if (is_0d) + { + grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); + grub_printf ("<%x>", (unsigned int) '\r'); + grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); + } + + if (utcount) + { + grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); + for (j = 0; j < utcount; j++) + grub_printf ("<%x>", (unsigned int) utbuf[j]); + grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); + } + + grub_xputs ("\n"); + grub_refresh (); + grub_file_close (file); + + return 0; +} + +static grub_extcmd_t cmd; + +GRUB_MOD_INIT(cat) +{ + cmd = grub_register_extcmd ("cat", grub_cmd_cat, 0, + N_("FILE"), N_("Show the contents of a file."), + options); +} + +GRUB_MOD_FINI(cat) +{ + grub_unregister_extcmd (cmd); +} |