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grub/normal/cmdline.c
okuji 0a74e62fde 2005-08-14 Yoshinori K. Okuji <okuji@enbug.org> 
* normal/menu.c (run_menu_entry):

        * normal/command.c (grub_command_execute): If INTERACTIVE is
        false and GRUB_COMMAND_FLAG_NO_ECHO is not specified, print
        CMDLINE. Disable the pager if INTERACTIVE is true.
        All callers are changed.

        * normal/main.c (grub_normal_execute): Read command.lst and fs.lst
        before reading a config file.
        * normal/main.c (read_config_file): Even if a command is not
        found, register it if it is within an entry.

        * util/grub-emu.c: Include sys/types.h and unistd.h.
        (options): Added --hold.
        (struct arguments): Added a new member "hold".
        (parse_opt): If KEY is 'H', set ARGS->HOLD to ARG or -1 if ARG is
        missing.
        (main): Initialize ARGS.HOLD to zero. Wait until ARGS.HOLD is
        cleared by a debugger, if it is not zero.

        * include/grub/normal.h (grub_command_execute): Add an argument
        INTERACTIVE.
2005-08-14 19:36:55 +00:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005 Free Software Foundation, Inc.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/normal.h>
#include <grub/misc.h>
#include <grub/term.h>
#include <grub/err.h>
#include <grub/types.h>
#include <grub/mm.h>
#include <grub/partition.h>
#include <grub/disk.h>
#include <grub/file.h>
#include <grub/env.h>
static char *kill_buf;
static int hist_size;
static char **hist_lines = 0;
static int hist_pos = 0;
static int hist_end = 0;
static int hist_used = 0;
grub_err_t
grub_set_history (int newsize)
{
char **old_hist_lines = hist_lines;
hist_lines = grub_malloc (sizeof (char *) * newsize);
/* Copy the old lines into the new buffer. */
if (old_hist_lines)
{
/* Remove the lines that don't fit in the new buffer. */
if (newsize < hist_used)
{
int i;
int delsize = hist_used - newsize;
hist_used = newsize;
for (i = 1; i <= delsize; i++)
{
int pos = hist_end - i;
if (pos < 0)
pos += hist_size;
grub_free (old_hist_lines[pos]);
}
hist_end -= delsize;
if (hist_end < 0)
hist_end += hist_size;
}
if (hist_pos < hist_end)
grub_memmove (hist_lines, old_hist_lines + hist_pos,
(hist_end - hist_pos) * sizeof (char *));
else if (hist_used)
{
/* Copy the older part. */
grub_memmove (hist_lines, old_hist_lines + hist_pos,
(hist_size - hist_pos) * sizeof (char *));
/* Copy the newer part. */
grub_memmove (hist_lines + hist_size - hist_pos, old_hist_lines,
hist_end * sizeof (char *));
}
}
grub_free (old_hist_lines);
hist_size = newsize;
hist_pos = 0;
hist_end = hist_used;
return 0;
}
/* Get the entry POS from the history where `0' is the newest
entry. */
static char *
grub_history_get (int pos)
{
pos = (hist_pos + pos) % hist_size;
return hist_lines[pos];
}
/* Insert a new history line S on the top of the history. */
static void
grub_history_add (char *s)
{
/* Remove the oldest entry in the history to make room for a new
entry. */
if (hist_used + 1 > hist_size)
{
hist_end--;
if (hist_end < 0)
hist_end = hist_size + hist_end;
grub_free (hist_lines[hist_end]);
}
else
hist_used++;
/* Move to the next position. */
hist_pos--;
if (hist_pos < 0)
hist_pos = hist_size + hist_pos;
/* Insert into history. */
hist_lines[hist_pos] = grub_strdup (s);
}
/* Replace the history entry on position POS with the string S. */
static void
grub_history_replace (int pos, char *s)
{
pos = (hist_pos + pos) % hist_size;
grub_free (hist_lines[pos]);
hist_lines[pos] = grub_strdup (s);
}
void
grub_cmdline_run (int nested)
{
grub_normal_init_page ();
grub_setcursor (1);
grub_printf ("\
[ Minimal BASH-like line editing is supported. For the first word, TAB\n\
lists possible command completions. Anywhere else TAB lists possible\n\
device/file completions.%s ]\n\n",
nested ? " ESC at any time exits." : "");
while (1)
{
static char cmdline[GRUB_MAX_CMDLINE];
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
cmdline[0] = '\0';
if (! grub_cmdline_get ("grub> ", cmdline, sizeof (cmdline), 0, 1)
&& nested)
return;
if (! *cmdline)
continue;
grub_command_execute (cmdline, 1);
}
}
/* Get a command-line. If ECHO_CHAR is not zero, echo it instead of input
characters. If READLINE is non-zero, readline-like key bindings are
available. If ESC is pushed, return zero, otherwise return non-zero. */
/* FIXME: The dumb interface is not supported yet. */
int
grub_cmdline_get (const char *prompt, char cmdline[], unsigned max_len,
int echo_char, int readline)
{
unsigned xpos, ypos, ystart;
grub_size_t lpos, llen;
grub_size_t plen;
char buf[max_len];
int key;
int histpos = 0;
auto void cl_insert (const char *str);
auto void cl_delete (unsigned len);
auto void cl_print (int pos, int c);
auto void cl_set_pos (void);
void cl_set_pos (void)
{
xpos = (plen + lpos) % 79;
ypos = ystart + (plen + lpos) / 79;
grub_gotoxy (xpos, ypos);
}
void cl_print (int pos, int c)
{
char *p;
for (p = buf + pos; *p; p++)
{
if (xpos++ > 78)
{
grub_putchar ('\n');
xpos = 1;
if (ypos == (unsigned) (grub_getxy () & 0xFF))
ystart--;
else
ypos++;
}
if (c)
grub_putchar (c);
else
grub_putchar (*p);
}
}
void cl_insert (const char *str)
{
grub_size_t len = grub_strlen (str);
if (len + llen < max_len)
{
grub_memmove (buf + lpos + len, buf + lpos, llen - lpos + 1);
grub_memmove (buf + lpos, str, len);
llen += len;
lpos += len;
cl_print (lpos - len, echo_char);
cl_set_pos ();
}
}
void cl_delete (unsigned len)
{
if (lpos + len <= llen)
{
grub_size_t saved_lpos = lpos;
lpos = llen - len;
cl_set_pos ();
cl_print (lpos, ' ');
lpos = saved_lpos;
cl_set_pos ();
grub_memmove (buf + lpos, buf + lpos + len, llen - lpos + 1);
llen -= len;
cl_print (lpos, echo_char);
cl_set_pos ();
}
}
plen = grub_strlen (prompt);
lpos = llen = 0;
buf[0] = '\0';
if ((grub_getxy () >> 8) != 0)
grub_putchar ('\n');
grub_printf (prompt);
xpos = plen;
ystart = ypos = (grub_getxy () & 0xFF);
cl_insert (cmdline);
if (hist_used == 0)
grub_history_add (buf);
while ((key = GRUB_TERM_ASCII_CHAR (grub_getkey ())) != '\n' && key != '\r')
{
if (readline)
{
switch (key)
{
case 1: /* Ctrl-a */
lpos = 0;
cl_set_pos ();
break;
case 2: /* Ctrl-b */
if (lpos > 0)
{
lpos--;
cl_set_pos ();
}
break;
case 5: /* Ctrl-e */
lpos = llen;
cl_set_pos ();
break;
case 6: /* Ctrl-f */
if (lpos < llen)
{
lpos++;
cl_set_pos ();
}
break;
case 9: /* Ctrl-i or TAB */
{
char *insert;
int restore;
/* Backup the next character and make it 0 so it will
be easy to use string functions. */
char backup = buf[lpos];
buf[lpos] = '\0';
insert = grub_normal_do_completion (buf, &restore);
/* Restore the original string. */
buf[lpos] = backup;
if (restore)
{
/* Restore the prompt. */
grub_printf ("\n%s%s", prompt, buf);
xpos = plen;
ystart = ypos = (grub_getxy () & 0xFF);
}
if (insert)
{
cl_insert (insert);
grub_free (insert);
}
}
break;
case 11: /* Ctrl-k */
if (lpos < llen)
{
if (kill_buf)
grub_free (kill_buf);
kill_buf = grub_strdup (buf + lpos);
grub_errno = GRUB_ERR_NONE;
cl_delete (llen - lpos);
}
break;
case 14: /* Ctrl-n */
{
char *hist;
lpos = 0;
if (histpos > 0)
{
grub_history_replace (histpos, buf);
histpos--;
}
cl_delete (llen);
hist = grub_history_get (histpos);
cl_insert (hist);
break;
}
case 16: /* Ctrl-p */
{
char *hist;
lpos = 0;
if (histpos < hist_used - 1)
{
grub_history_replace (histpos, buf);
histpos++;
}
cl_delete (llen);
hist = grub_history_get (histpos);
cl_insert (hist);
}
break;
case 21: /* Ctrl-u */
if (lpos > 0)
{
grub_size_t n = lpos;
if (kill_buf)
grub_free (kill_buf);
kill_buf = grub_malloc (n + 1);
grub_errno = GRUB_ERR_NONE;
if (kill_buf)
{
grub_memcpy (kill_buf, buf, n);
kill_buf[n] = '\0';
}
lpos = 0;
cl_set_pos ();
cl_delete (n);
}
break;
case 25: /* Ctrl-y */
if (kill_buf)
cl_insert (kill_buf);
break;
}
}
switch (key)
{
case '\e':
return 0;
case '\b':
if (lpos > 0)
{
lpos--;
cl_set_pos ();
}
else
break;
/* fall through */
case 4: /* Ctrl-d */
if (lpos < llen)
cl_delete (1);
break;
default:
if (grub_isprint (key))
{
char str[2];
str[0] = key;
str[1] = '\0';
cl_insert (str);
}
break;
}
}
grub_putchar ('\n');
grub_refresh ();
/* If ECHO_CHAR is NUL, remove leading spaces. */
lpos = 0;
if (! echo_char)
while (buf[lpos] == ' ')
lpos++;
histpos = 0;
if (grub_strlen (buf) > 0)
{
grub_history_replace (histpos, buf);
grub_history_add ("");
}
grub_memcpy (cmdline, buf + lpos, llen - lpos + 1);
return 1;
}
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