104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/* 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/extcmd.h>
|
||
#include <grub/i18n.h>
|
||
|
||
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_t cmd, int argc, char **args)
|
||
{
|
||
struct grub_arg_list *state = cmd->state;
|
||
int dos = 0;
|
||
grub_file_t file;
|
||
char buf[GRUB_DISK_SECTOR_SIZE];
|
||
grub_ssize_t size;
|
||
int key = 0;
|
||
|
||
if (state[0].set)
|
||
dos = 1;
|
||
|
||
if (argc != 1)
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
|
||
|
||
file = grub_gzfile_open (args[0], 1);
|
||
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++)
|
||
{
|
||
unsigned char c = buf[i];
|
||
|
||
if ((grub_isprint (c) || grub_isspace (c)) && c != '\r')
|
||
grub_printf ("%c", c);
|
||
else if (dos && c == '\r' && i + 1 < size && buf[i + 1] == '\n')
|
||
{
|
||
grub_printf ("\n");
|
||
i++;
|
||
}
|
||
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_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, GRUB_COMMAND_FLAG_BOTH,
|
||
N_("FILE"), N_("Show the contents of a file."),
|
||
options);
|
||
}
|
||
|
||
GRUB_MOD_FINI(cat)
|
||
{
|
||
grub_unregister_extcmd (cmd);
|
||
}
|