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/* 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);
}
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