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grub/grub-core/term/terminfo.c
Peter Jones d5a32255de misc: Make grub_strtol() "end" pointers have safer const qualifiers 
Currently the string functions grub_strtol(), grub_strtoul(), and
grub_strtoull() don't declare the "end" pointer in such a way as to
require the pointer itself or the character array to be immutable to the
implementation, nor does the C standard do so in its similar functions,
though it does require us not to change any of it.

The typical declarations of these functions follow this pattern:

long
strtol(const char * restrict nptr, char ** restrict endptr, int base);

Much of the reason for this is historic, and a discussion of that
follows below, after the explanation of this change.  (GRUB currently
does not include the "restrict" qualifiers, and we name the arguments a
bit differently.)

The implementation is semantically required to treat the character array
as immutable, but such accidental modifications aren't stopped by the
compiler, and the semantics for both the callers and the implementation
of these functions are sometimes also helped by adding that requirement.

This patch changes these declarations to follow this pattern instead:

long
strtol(const char * restrict nptr,
       const char ** const restrict endptr,
       int base);

This means that if any modification to these functions accidentally
introduces either an errant modification to the underlying character
array, or an accidental assignment to endptr rather than *endptr, the
compiler should generate an error.  (The two uses of "restrict" in this
case basically mean strtol() isn't allowed to modify the character array
by going through *endptr, and endptr isn't allowed to point inside the
array.)

It also means the typical use case changes to:

  char *s = ...;
  const char *end;
  long l;

  l = strtol(s, &end, 10);

Or even:

  const char *p = str;
  while (p && *p) {
	  long l = strtol(p, &p, 10);
	  ...
  }

This fixes 26 places where we discard our attempts at treating the data
safely by doing:

  const char *p = str;
  long l;

  l = strtol(p, (char **)&ptr, 10);

It also adds 5 places where we do:

  char *p = str;
  while (p && *p) {
	  long l = strtol(p, (const char ** const)&p, 10);
	  ...
	  /* more calls that need p not to be pointer-to-const */
  }

While moderately distasteful, this is a better problem to have.

With one minor exception, I have tested that all of this compiles
without relevant warnings or errors, and that /much/ of it behaves
correctly, with gcc 9 using 'gcc -W -Wall -Wextra'.  The one exception
is the changes in grub-core/osdep/aros/hostdisk.c , which I have no idea
how to build.

Because the C standard defined type-qualifiers in a way that can be
confusing, in the past there's been a slow but fairly regular stream of
churn within our patches, which add and remove the const qualifier in many
of the users of these functions.  This change should help avoid that in
the future, and in order to help ensure this, I've added an explanation
in misc.h so that when someone does get a compiler warning about a type
error, they have the fix at hand.

The reason we don't have "const" in these calls in the standard is
purely anachronistic: C78 (de facto) did not have type qualifiers in the
syntax, and the "const" type qualifier was added for C89 (I think; it
may have been later).  strtol() appears to date from 4.3BSD in 1986,
which means it could not be added to those functions in the standard
without breaking compatibility, which is usually avoided.

The syntax chosen for type qualifiers is what has led to the churn
regarding usage of const, and is especially confusing on string
functions due to the lack of a string type.  Quoting from C99, the
syntax is:

 declarator:
  pointer[opt] direct-declarator
 direct-declarator:
  identifier
  ( declarator )
  direct-declarator [ type-qualifier-list[opt] assignment-expression[opt] ]
  ...
  direct-declarator [ type-qualifier-list[opt] * ]
  ...
 pointer:
  * type-qualifier-list[opt]
  * type-qualifier-list[opt] pointer
 type-qualifier-list:
  type-qualifier
  type-qualifier-list type-qualifier
 ...
 type-qualifier:
  const
  restrict
  volatile

So the examples go like:

const char foo;			// immutable object
const char *foo;		// mutable pointer to object
char * const foo;		// immutable pointer to mutable object
const char * const foo;		// immutable pointer to immutable object
const char const * const foo; 	// XXX extra const keyword in the middle
const char * const * const foo; // immutable pointer to immutable
				//   pointer to immutable object
const char ** const foo;	// immutable pointer to mutable pointer
				//   to immutable object

Making const left-associative for * and right-associative for everything
else may not have been the best choice ever, but here we are, and the
inevitable result is people using trying to use const (as they should!),
putting it at the wrong place, fighting with the compiler for a bit, and
then either removing it or typecasting something in a bad way.  I won't
go into describing restrict, but its syntax has exactly the same issue
as with const.

Anyway, the last example above actually represents the *behavior* that's
required of strtol()-like functions, so that's our choice for the "end"
pointer.

Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2020-02-28 12:41:29 +01:00

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/* terminfo.c - simple terminfo module */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004,2005,2007 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/>.
*/
/*
* This file contains various functions dealing with different
* terminal capabilities. For example, vt52 and vt100.
*/
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/err.h>
#include <grub/dl.h>
#include <grub/term.h>
#include <grub/terminfo.h>
#include <grub/tparm.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
#include <grub/time.h>
#if defined(__powerpc__) && defined(GRUB_MACHINE_IEEE1275)
#include <grub/ieee1275/ieee1275.h>
#endif
GRUB_MOD_LICENSE ("GPLv3+");
#define ANSI_CSI 0x9b
#define ANSI_CSI_STR "\x9b"
static struct grub_term_output *terminfo_outputs;
/* Get current terminfo name. */
char *
grub_terminfo_get_current (struct grub_term_output *term)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
return data->name;
}
/* Free *PTR and set *PTR to NULL, to prevent double-free. */
static void
grub_terminfo_free (char **ptr)
{
grub_free (*ptr);
*ptr = 0;
}
static void
grub_terminfo_all_free (struct grub_term_output *term)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
/* Free previously allocated memory. */
grub_terminfo_free (&data->name);
grub_terminfo_free (&data->gotoxy);
grub_terminfo_free (&data->cls);
grub_terminfo_free (&data->reverse_video_on);
grub_terminfo_free (&data->reverse_video_off);
grub_terminfo_free (&data->cursor_on);
grub_terminfo_free (&data->cursor_off);
}
/* Set current terminfo type. */
grub_err_t
grub_terminfo_set_current (struct grub_term_output *term,
const char *str)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
/* TODO
* Lookup user specified terminfo type. If found, set term variables
* as appropriate. Otherwise return an error.
*
* How should this be done?
* a. A static table included in this module.
* - I do not like this idea.
* b. A table stored in the configuration directory.
* - Users must convert their terminfo settings if we have not already.
* c. Look for terminfo files in the configuration directory.
* - /usr/share/terminfo is 6.3M on my system.
* - /usr/share/terminfo is not on most users boot partition.
* + Copying the terminfo files you want to use to the grub
* configuration directory is easier then (b).
* d. Your idea here.
*/
grub_terminfo_all_free (term);
if (grub_strcmp ("vt100", str) == 0)
{
data->name = grub_strdup ("vt100");
data->gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
data->cls = grub_strdup ("\e[H\e[J");
data->reverse_video_on = grub_strdup ("\e[7m");
data->reverse_video_off = grub_strdup ("\e[m");
data->cursor_on = grub_strdup ("\e[?25h");
data->cursor_off = grub_strdup ("\e[?25l");
data->setcolor = NULL;
return grub_errno;
}
if (grub_strcmp ("vt100-color", str) == 0)
{
data->name = grub_strdup ("vt100-color");
data->gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
data->cls = grub_strdup ("\e[H\e[J");
data->reverse_video_on = grub_strdup ("\e[7m");
data->reverse_video_off = grub_strdup ("\e[m");
data->cursor_on = grub_strdup ("\e[?25h");
data->cursor_off = grub_strdup ("\e[?25l");
data->setcolor = grub_strdup ("\e[3%p1%dm\e[4%p2%dm");
return grub_errno;
}
if (grub_strcmp ("arc", str) == 0)
{
data->name = grub_strdup ("arc");
data->gotoxy = grub_strdup (ANSI_CSI_STR "%i%p1%d;%p2%dH");
data->cls = grub_strdup (ANSI_CSI_STR "2J");
data->reverse_video_on = grub_strdup (ANSI_CSI_STR "7m");
data->reverse_video_off = grub_strdup (ANSI_CSI_STR "0m");
data->cursor_on = 0;
data->cursor_off = 0;
data->setcolor = grub_strdup (ANSI_CSI_STR "3%p1%dm"
ANSI_CSI_STR "4%p2%dm");
return grub_errno;
}
if (grub_strcmp ("ieee1275", str) == 0
|| grub_strcmp ("ieee1275-nocursor", str) == 0)
{
data->name = grub_strdup ("ieee1275");
data->gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
/* Clear the screen. Using serial console, screen(1) only recognizes the
* ANSI escape sequence. Using video console, Apple Open Firmware
* (version 3.1.1) only recognizes the literal ^L. So use both. */
data->cls = grub_strdup (" \e[2J");
data->reverse_video_on = grub_strdup ("\e[7m");
data->reverse_video_off = grub_strdup ("\e[m");
if (grub_strcmp ("ieee1275", str) == 0)
{
data->cursor_on = grub_strdup ("\e[?25h");
data->cursor_off = grub_strdup ("\e[?25l");
}
else
{
data->cursor_on = 0;
data->cursor_off = 0;
}
data->setcolor = grub_strdup ("\e[3%p1%dm\e[4%p2%dm");
return grub_errno;
}
if (grub_strcmp ("dumb", str) == 0)
{
data->name = grub_strdup ("dumb");
data->gotoxy = NULL;
data->cls = NULL;
data->reverse_video_on = NULL;
data->reverse_video_off = NULL;
data->cursor_on = NULL;
data->cursor_off = NULL;
data->setcolor = NULL;
return grub_errno;
}
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("unknown terminfo type `%s'"),
str);
}
grub_err_t
grub_terminfo_output_register (struct grub_term_output *term,
const char *type)
{
grub_err_t err;
struct grub_terminfo_output_state *data;
err = grub_terminfo_set_current (term, type);
if (err)
return err;
data = (struct grub_terminfo_output_state *) term->data;
data->next = terminfo_outputs;
terminfo_outputs = term;
return GRUB_ERR_NONE;
}
grub_err_t
grub_terminfo_output_unregister (struct grub_term_output *term)
{
struct grub_term_output **ptr;
for (ptr = &terminfo_outputs; *ptr;
ptr = &((struct grub_terminfo_output_state *) (*ptr)->data)->next)
if (*ptr == term)
{
grub_terminfo_all_free (term);
*ptr = ((struct grub_terminfo_output_state *) (*ptr)->data)->next;
return GRUB_ERR_NONE;
}
return grub_error (GRUB_ERR_BUG, "terminal not found");
}
/* Wrapper for grub_putchar to write strings. */
static void
putstr (struct grub_term_output *term, const char *str)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
while (*str)
data->put (term, *str++);
}
struct grub_term_coordinate
grub_terminfo_getxy (struct grub_term_output *term)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
return data->pos;
}
void
grub_terminfo_gotoxy (struct grub_term_output *term,
struct grub_term_coordinate pos)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
if (pos.x > grub_term_width (term) || pos.y > grub_term_height (term))
{
grub_error (GRUB_ERR_BUG, "invalid point (%u,%u)", pos.x, pos.y);
return;
}
if (data->gotoxy)
putstr (term, grub_terminfo_tparm (data->gotoxy, pos.y, pos.x));
else
{
if ((pos.y == data->pos.y) && (pos.x == data->pos.x - 1))
data->put (term, '\b');
}
data->pos = pos;
}
/* Clear the screen. */
void
grub_terminfo_cls (struct grub_term_output *term)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
putstr (term, grub_terminfo_tparm (data->cls));
grub_terminfo_gotoxy (term, (struct grub_term_coordinate) { 0, 0 });
}
void
grub_terminfo_setcolorstate (struct grub_term_output *term,
const grub_term_color_state state)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
if (data->setcolor)
{
int fg;
int bg;
/* Map from VGA to terminal colors. */
const int colormap[8]
= { 0, /* Black. */
4, /* Blue. */
2, /* Green. */
6, /* Cyan. */
1, /* Red. */
5, /* Magenta. */
3, /* Yellow. */
7, /* White. */
};
switch (state)
{
case GRUB_TERM_COLOR_STANDARD:
case GRUB_TERM_COLOR_NORMAL:
fg = grub_term_normal_color & 0x0f;
bg = grub_term_normal_color >> 4;
break;
case GRUB_TERM_COLOR_HIGHLIGHT:
fg = grub_term_highlight_color & 0x0f;
bg = grub_term_highlight_color >> 4;
break;
default:
return;
}
putstr (term, grub_terminfo_tparm (data->setcolor, colormap[fg & 7],
colormap[bg & 7]));
return;
}
switch (state)
{
case GRUB_TERM_COLOR_STANDARD:
case GRUB_TERM_COLOR_NORMAL:
putstr (term, grub_terminfo_tparm (data->reverse_video_off));
break;
case GRUB_TERM_COLOR_HIGHLIGHT:
putstr (term, grub_terminfo_tparm (data->reverse_video_on));
break;
default:
break;
}
}
void
grub_terminfo_setcursor (struct grub_term_output *term, const int on)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
if (on)
putstr (term, grub_terminfo_tparm (data->cursor_on));
else
putstr (term, grub_terminfo_tparm (data->cursor_off));
}
/* The terminfo version of putchar. */
void
grub_terminfo_putchar (struct grub_term_output *term,
const struct grub_unicode_glyph *c)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
/* Keep track of the cursor. */
switch (c->base)
{
case '\a':
break;
case '\b':
case 127:
if (data->pos.x > 0)
data->pos.x--;
break;
case '\n':
if (data->pos.y < grub_term_height (term) - 1)
data->pos.y++;
break;
case '\r':
data->pos.x = 0;
break;
default:
if ((int) data->pos.x + c->estimated_width >= (int) grub_term_width (term) + 1)
{
data->pos.x = 0;
if (data->pos.y < grub_term_height (term) - 1)
data->pos.y++;
data->put (term, '\r');
data->put (term, '\n');
}
data->pos.x += c->estimated_width;
break;
}
data->put (term, c->base);
}
struct grub_term_coordinate
grub_terminfo_getwh (struct grub_term_output *term)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) term->data;
return data->size;
}
static void
grub_terminfo_readkey (struct grub_term_input *term, int *keys, int *len,
int (*readkey) (struct grub_term_input *term))
{
int c;
#define CONTINUE_READ \
{ \
grub_uint64_t start; \
/* On 9600 we have to wait up to 12 milliseconds. */ \
start = grub_get_time_ms (); \
do \
c = readkey (term); \
while (c == -1 && grub_get_time_ms () - start < 100); \
if (c == -1) \
return; \
\
keys[*len] = c; \
(*len)++; \
}
c = readkey (term);
if (c < 0)
{
*len = 0;
return;
}
*len = 1;
keys[0] = c;
if (c != ANSI_CSI && c != GRUB_TERM_ESC)
{
/* Backspace: Ctrl-h. */
if (c == 0x7f)
c = GRUB_TERM_BACKSPACE;
if (c < 0x20 && c != GRUB_TERM_TAB && c!= GRUB_TERM_BACKSPACE && c != '\n' && c != '\r')
c = GRUB_TERM_CTRL | (c - 1 + 'a');
*len = 1;
keys[0] = c;
return;
}
{
static struct
{
char key;
unsigned ascii;
}
three_code_table[] =
{
{'4', GRUB_TERM_KEY_DC},
{'A', GRUB_TERM_KEY_UP},
{'B', GRUB_TERM_KEY_DOWN},
{'C', GRUB_TERM_KEY_RIGHT},
{'D', GRUB_TERM_KEY_LEFT},
{'F', GRUB_TERM_KEY_END},
{'H', GRUB_TERM_KEY_HOME},
{'K', GRUB_TERM_KEY_END},
{'P', GRUB_TERM_KEY_DC},
{'?', GRUB_TERM_KEY_PPAGE},
{'/', GRUB_TERM_KEY_NPAGE},
{'@', GRUB_TERM_KEY_INSERT},
};
static unsigned four_code_table[] =
{
[1] = GRUB_TERM_KEY_HOME,
[3] = GRUB_TERM_KEY_DC,
[5] = GRUB_TERM_KEY_PPAGE,
[6] = GRUB_TERM_KEY_NPAGE,
[7] = GRUB_TERM_KEY_HOME,
[8] = GRUB_TERM_KEY_END,
[17] = GRUB_TERM_KEY_F6,
[18] = GRUB_TERM_KEY_F7,
[19] = GRUB_TERM_KEY_F8,
[20] = GRUB_TERM_KEY_F9,
[21] = GRUB_TERM_KEY_F10,
[23] = GRUB_TERM_KEY_F11,
[24] = GRUB_TERM_KEY_F12,
};
char fx_key[] =
{ 'P', 'Q', 'w', 'x', 't', 'u',
'q', 'r', 'p', 'M', 'A', 'B', 'H', 'F' };
unsigned fx_code[] =
{ GRUB_TERM_KEY_F1, GRUB_TERM_KEY_F2, GRUB_TERM_KEY_F3,
GRUB_TERM_KEY_F4, GRUB_TERM_KEY_F5, GRUB_TERM_KEY_F6,
GRUB_TERM_KEY_F7, GRUB_TERM_KEY_F8, GRUB_TERM_KEY_F9,
GRUB_TERM_KEY_F10, GRUB_TERM_KEY_F11, GRUB_TERM_KEY_F12,
GRUB_TERM_KEY_HOME, GRUB_TERM_KEY_END };
unsigned i;
if (c == GRUB_TERM_ESC)
{
CONTINUE_READ;
if (c == 'O')
{
CONTINUE_READ;
for (i = 0; i < ARRAY_SIZE (fx_key); i++)
if (fx_key[i] == c)
{
keys[0] = fx_code[i];
*len = 1;
return;
}
}
if (c != '[')
return;
}
CONTINUE_READ;
for (i = 0; i < ARRAY_SIZE (three_code_table); i++)
if (three_code_table[i].key == c)
{
keys[0] = three_code_table[i].ascii;
*len = 1;
return;
}
switch (c)
{
case '[':
CONTINUE_READ;
if (c >= 'A' && c <= 'E')
{
keys[0] = GRUB_TERM_KEY_F1 + c - 'A';
*len = 1;
return;
}
return;
case 'O':
CONTINUE_READ;
for (i = 0; i < ARRAY_SIZE (fx_key); i++)
if (fx_key[i] == c)
{
keys[0] = fx_code[i];
*len = 1;
return;
}
return;
case '0':
{
int num = 0;
CONTINUE_READ;
if (c != '0' && c != '1')
return;
num = (c - '0') * 10;
CONTINUE_READ;
if (c < '0' || c > '9')
return;
num += (c - '0');
if (num == 0 || num > 12)
return;
CONTINUE_READ;
if (c != 'q')
return;
keys[0] = fx_code[num - 1];
*len = 1;
return;
}
case '1' ... '9':
{
unsigned val = c - '0';
CONTINUE_READ;
if (c >= '0' && c <= '9')
{
val = val * 10 + (c - '0');
CONTINUE_READ;
}
if (c != '~')
return;
if (val >= ARRAY_SIZE (four_code_table)
|| four_code_table[val] == 0)
return;
keys[0] = four_code_table[val];
*len = 1;
return;
}
default:
return;
}
}
#undef CONTINUE_READ
}
/* The terminfo version of getkey. */
int
grub_terminfo_getkey (struct grub_term_input *termi)
{
struct grub_terminfo_input_state *data
= (struct grub_terminfo_input_state *) (termi->data);
if (data->npending)
{
int ret;
data->npending--;
ret = data->input_buf[0];
grub_memmove (data->input_buf, data->input_buf + 1, data->npending
* sizeof (data->input_buf[0]));
return ret;
}
grub_terminfo_readkey (termi, data->input_buf,
&data->npending, data->readkey);
#if defined(__powerpc__) && defined(GRUB_MACHINE_IEEE1275)
if (data->npending == 1 && data->input_buf[0] == GRUB_TERM_ESC
&& grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_BROKEN_REPEAT)
&& grub_get_time_ms () - data->last_key_time < 1000
&& (data->last_key & GRUB_TERM_EXTENDED))
{
data->npending = 0;
data->last_key_time = grub_get_time_ms ();
return data->last_key;
}
#endif
if (data->npending)
{
int ret;
data->npending--;
ret = data->input_buf[0];
#if defined(__powerpc__) && defined(GRUB_MACHINE_IEEE1275)
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_BROKEN_REPEAT))
{
data->last_key = ret;
data->last_key_time = grub_get_time_ms ();
}
#endif
grub_memmove (data->input_buf, data->input_buf + 1, data->npending
* sizeof (data->input_buf[0]));
return ret;
}
return GRUB_TERM_NO_KEY;
}
grub_err_t
grub_terminfo_input_init (struct grub_term_input *termi)
{
struct grub_terminfo_input_state *data
= (struct grub_terminfo_input_state *) (termi->data);
data->npending = 0;
return GRUB_ERR_NONE;
}
grub_err_t
grub_terminfo_output_init (struct grub_term_output *term)
{
grub_terminfo_cls (term);
return GRUB_ERR_NONE;
}
/* GRUB Command. */
static grub_err_t
print_terminfo (void)
{
const char *encoding_names[(GRUB_TERM_CODE_TYPE_MASK
>> GRUB_TERM_CODE_TYPE_SHIFT) + 1]
= {
/* VGA and glyph descriptor types are just for completeness,
they are not used on terminfo terminals.
*/
[GRUB_TERM_CODE_TYPE_ASCII >> GRUB_TERM_CODE_TYPE_SHIFT] = _("ASCII"),
[GRUB_TERM_CODE_TYPE_CP437 >> GRUB_TERM_CODE_TYPE_SHIFT] = "CP-437",
[GRUB_TERM_CODE_TYPE_UTF8_LOGICAL >> GRUB_TERM_CODE_TYPE_SHIFT]
= _("UTF-8"),
[GRUB_TERM_CODE_TYPE_UTF8_VISUAL >> GRUB_TERM_CODE_TYPE_SHIFT]
/* TRANSLATORS: visually ordered UTF-8 is a non-compliant encoding
based on UTF-8 with right-to-left languages written in reverse.
Used on some terminals. Normal UTF-8 is refered as
"logically-ordered UTF-8" by opposition. */
= _("visually-ordered UTF-8"),
[GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS >> GRUB_TERM_CODE_TYPE_SHIFT]
= "Glyph descriptors",
_("Unknown encoding"), _("Unknown encoding"), _("Unknown encoding")
};
struct grub_term_output *cur;
grub_puts_ (N_("Current terminfo types:"));
for (cur = terminfo_outputs; cur;
cur = ((struct grub_terminfo_output_state *) cur->data)->next)
grub_printf ("%s: %s\t%s\t%dx%d\n", cur->name,
grub_terminfo_get_current(cur),
encoding_names[(cur->flags & GRUB_TERM_CODE_TYPE_MASK)
>> GRUB_TERM_CODE_TYPE_SHIFT],
((struct grub_terminfo_output_state *) cur->data)->pos.x,
((struct grub_terminfo_output_state *) cur->data)->pos.y);
return GRUB_ERR_NONE;
}
static const struct grub_arg_option options[] =
{
{"ascii", 'a', 0, N_("Terminal is ASCII-only [default]."), 0, ARG_TYPE_NONE},
{"utf8", 'u', 0, N_("Terminal is logical-ordered UTF-8."), 0, ARG_TYPE_NONE},
{"visual-utf8", 'v', 0, N_("Terminal is visually-ordered UTF-8."), 0,
ARG_TYPE_NONE},
{"geometry", 'g', 0, N_("Terminal has specified geometry."),
/* TRANSLATORS: "x" has to be entered in, like an identifier, so please don't
use better Unicode codepoints. */
N_("WIDTHxHEIGHT."), ARG_TYPE_STRING},
{0, 0, 0, 0, 0, 0}
};
enum
{
OPTION_ASCII,
OPTION_UTF8,
OPTION_VISUAL_UTF8,
OPTION_GEOMETRY
};
static grub_err_t
grub_cmd_terminfo (grub_extcmd_context_t ctxt, int argc, char **args)
{
struct grub_term_output *cur;
int encoding = GRUB_TERM_CODE_TYPE_ASCII;
struct grub_arg_list *state = ctxt->state;
int w = 0, h = 0;
if (argc == 0)
return print_terminfo ();
if (state[OPTION_ASCII].set)
encoding = GRUB_TERM_CODE_TYPE_ASCII;
if (state[OPTION_UTF8].set)
encoding = GRUB_TERM_CODE_TYPE_UTF8_LOGICAL;
if (state[OPTION_VISUAL_UTF8].set)
encoding = GRUB_TERM_CODE_TYPE_UTF8_VISUAL;
if (state[OPTION_GEOMETRY].set)
{
const char *ptr = state[OPTION_GEOMETRY].arg;
w = grub_strtoul (ptr, &ptr, 0);
if (grub_errno)
return grub_errno;
if (*ptr != 'x')
return grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("incorrect terminal dimensions specification"));
ptr++;
h = grub_strtoul (ptr, &ptr, 0);
if (grub_errno)
return grub_errno;
}
for (cur = terminfo_outputs; cur;
cur = ((struct grub_terminfo_output_state *) cur->data)->next)
if (grub_strcmp (args[0], cur->name) == 0
|| (grub_strcmp (args[0], "ofconsole") == 0
&& grub_strcmp ("console", cur->name) == 0))
{
cur->flags = (cur->flags & ~GRUB_TERM_CODE_TYPE_MASK) | encoding;
if (w && h)
{
struct grub_terminfo_output_state *data
= (struct grub_terminfo_output_state *) cur->data;
data->size.x = w;
data->size.y = h;
}
if (argc == 1)
return GRUB_ERR_NONE;
return grub_terminfo_set_current (cur, args[1]);
}
return grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("terminal %s isn't found or it's not handled by terminfo"),
args[0]);
}
static grub_extcmd_t cmd;
GRUB_MOD_INIT(terminfo)
{
cmd = grub_register_extcmd ("terminfo", grub_cmd_terminfo, 0,
N_("[[-a|-u|-v] [-g WxH] TERM [TYPE]]"),
N_("Set terminfo type of TERM to TYPE.\n"),
options);
}
GRUB_MOD_FINI(terminfo)
{
grub_unregister_extcmd (cmd);
}
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