static const char *do_hidden_menu(void)
{
int key;
int timeout_left, this_timeout;
clear_screen();
if (!setjmp(timeout_jump)) {
timeout_left = cm->timeout;
while (!cm->timeout || timeout_left) {
int tol = timeout_left / CLK_TCK;
print_timeout_message(tol, HIDDEN_ROW, cm->messages[MSG_AUTOBOOT]);
this_timeout = min(timeout_left, CLK_TCK);
key = mygetkey(this_timeout);
if (key != KEY_NONE)
return NULL; /* Key pressed */
timeout_left -= this_timeout;
}
}
/* Clear the message from the screen */
print_timeout_message(0, HIDDEN_ROW, "");
if (cm->ontimeout)
return cm->ontimeout;
else
return cm->menu_entries[cm->defentry]->cmdline; /* Default entry */
}
static const char *run_menu(void)
{
int key;
int done = 0;
volatile int entry = cm->curentry;
int prev_entry = -1;
volatile int top = cm->curtop;
int prev_top = -1;
int clear = 1, to_clear;
const char *cmdline = NULL;
volatile clock_t key_timeout, timeout_left, this_timeout;
const struct menu_entry *me;
bool hotkey = false;
/* Note: for both key_timeout and timeout == 0 means no limit */
timeout_left = key_timeout = cm->timeout;
/* If we're in shiftkey mode, exit immediately unless a shift key
is pressed */
if (shiftkey && !shift_is_held()) {
return cm->menu_entries[cm->defentry]->cmdline;
} else {
shiftkey = 0;
}
/* Do this before hiddenmenu handling, so we show the background */
prepare_screen_for_menu();
/* Handle hiddenmenu */
if (hiddenmenu) {
cmdline = do_hidden_menu();
if (cmdline)
return cmdline;
/* Otherwise display the menu now; the timeout has already been
cancelled, since the user pressed a key. */
hiddenmenu = 0;
key_timeout = 0;
}
/* Handle both local and global timeout */
if (setjmp(timeout_jump)) {
entry = cm->defentry;
if (top < 0 || top < entry - MENU_ROWS + 1)
top = max(0, entry - MENU_ROWS + 1);
else if (top > entry || top > max(0, cm->nentries - MENU_ROWS))
top = min(entry, max(0, cm->nentries - MENU_ROWS));
draw_menu(cm->ontimeout ? -1 : entry, top, 1);
cmdline =
cm->ontimeout ? cm->ontimeout : cm->menu_entries[entry]->cmdline;
done = 1;
}
while (!done) {
if (entry <= 0) {
entry = 0;
while (entry < cm->nentries && is_disabled(cm->menu_entries[entry]))
entry++;
}
if (entry >= cm->nentries - 1) {
entry = cm->nentries - 1;
while (entry > 0 && is_disabled(cm->menu_entries[entry]))
entry--;
}
me = cm->menu_entries[entry];
if (top < 0 || top < entry - MENU_ROWS + 1)
top = max(0, entry - MENU_ROWS + 1);
else if (top > entry || top > max(0, cm->nentries - MENU_ROWS))
top = min(entry, max(0, cm->nentries - MENU_ROWS));
/* Start with a clear screen */
if (clear) {
/* Clear and redraw whole screen */
/* Enable ASCII on G0 and DEC VT on G1; do it in this order
to avoid confusing the Linux console */
if (clear >= 2)
prepare_screen_for_menu();
clear_screen();
clear = 0;
prev_entry = prev_top = -1;
}
if (top != prev_top) {
draw_menu(entry, top, 1);
display_help(me->helptext);
} else if (entry != prev_entry) {
draw_row(prev_entry - top + 4 + VSHIFT, entry, top, 0, 0);
draw_row(entry - top + 4 + VSHIFT, entry, top, 0, 0);
display_help(me->helptext);
}
prev_entry = entry;
prev_top = top;
cm->curentry = entry;
cm->curtop = top;
/* Cursor movement cancels timeout */
if (entry != cm->defentry)
key_timeout = 0;
if (key_timeout) {
int tol = timeout_left / CLK_TCK;
print_timeout_message(tol, TIMEOUT_ROW, cm->messages[MSG_AUTOBOOT]);
to_clear = 1;
} else {
to_clear = 0;
}
if (hotkey && me->immediate) {
/* If the hotkey was flagged immediate, simulate pressing ENTER */
key = KEY_ENTER;
} else {
this_timeout = min(min(key_timeout, timeout_left),
(clock_t) CLK_TCK);
key = mygetkey(this_timeout);
if (key != KEY_NONE) {
timeout_left = key_timeout;
if (to_clear)
printf("\033[%d;1H\1#0\033[K", TIMEOUT_ROW);
}
}
hotkey = false;
switch (key) {
case KEY_NONE: /* Timeout */
/* This is somewhat hacky, but this at least lets the user
know what's going on, and still deals with "phantom inputs"
e.g. on serial ports.
Warning: a timeout will boot the default entry without any
password! */
if (key_timeout) {
if (timeout_left <= this_timeout)
longjmp(timeout_jump, 1);
timeout_left -= this_timeout;
}
break;
case KEY_CTRL('L'):
clear = 1;
break;
case KEY_ENTER:
case KEY_CTRL('J'):
key_timeout = 0; /* Cancels timeout */
if (me->passwd) {
clear = 1;
done = ask_passwd(me->passwd);
} else {
done = 1;
}
cmdline = NULL;
if (done) {
switch (me->action) {
case MA_CMD:
cmdline = me->cmdline;
break;
case MA_SUBMENU:
case MA_GOTO:
case MA_EXIT:
done = 0;
clear = 2;
cm = me->submenu;
entry = cm->curentry;
top = cm->curtop;
break;
case MA_QUIT:
/* Quit menu system */
done = 1;
clear = 1;
draw_row(entry - top + 4 + VSHIFT, -1, top, 0, 0);
break;
case MA_HELP:
key = show_message_file(me->cmdline, me->background);
/* If the exit was an F-key, display that help screen */
show_fkey(key);
done = 0;
clear = 1;
break;
default:
done = 0;
break;
}
}
if (done && !me->passwd) {
/* Only save a new default if we don't have a password... */
if (me->save && me->label) {
syslinux_setadv(ADV_MENUSAVE, strlen(me->label), me->label);
syslinux_adv_write();
}
}
break;
case KEY_UP:
case KEY_CTRL('P'):
while (entry > 0) {
entry--;
if (entry < top)
top -= MENU_ROWS;
if (!is_disabled(cm->menu_entries[entry]))
break;
}
break;
case KEY_DOWN:
case KEY_CTRL('N'):
while (entry < cm->nentries - 1) {
entry++;
if (entry >= top + MENU_ROWS)
top += MENU_ROWS;
if (!is_disabled(cm->menu_entries[entry]))
break;
}
break;
case KEY_PGUP:
case KEY_LEFT:
case KEY_CTRL('B'):
case '<':
entry -= MENU_ROWS;
top -= MENU_ROWS;
while (entry > 0 && is_disabled(cm->menu_entries[entry])) {
entry--;
if (entry < top)
top -= MENU_ROWS;
}
break;
case KEY_PGDN:
case KEY_RIGHT:
case KEY_CTRL('F'):
case '>':
case ' ':
entry += MENU_ROWS;
top += MENU_ROWS;
while (entry < cm->nentries - 1
&& is_disabled(cm->menu_entries[entry])) {
entry++;
if (entry >= top + MENU_ROWS)
top += MENU_ROWS;
}
break;
case '-':
while (entry > 0) {
entry--;
top--;
if (!is_disabled(cm->menu_entries[entry]))
break;
}
break;
case '+':
while (entry < cm->nentries - 1) {
entry++;
top++;
if (!is_disabled(cm->menu_entries[entry]))
break;
}
break;
case KEY_CTRL('A'):
case KEY_HOME:
top = entry = 0;
break;
case KEY_CTRL('E'):
case KEY_END:
entry = cm->nentries - 1;
top = max(0, cm->nentries - MENU_ROWS);
break;
case KEY_F1:
case KEY_F2:
case KEY_F3:
case KEY_F4:
case KEY_F5:
case KEY_F6:
case KEY_F7:
case KEY_F8:
case KEY_F9:
case KEY_F10:
case KEY_F11:
case KEY_F12:
show_fkey(key);
clear = 1;
break;
case KEY_TAB:
if (cm->allowedit && me->action == MA_CMD) {
int ok = 1;
key_timeout = 0; /* Cancels timeout */
draw_row(entry - top + 4 + VSHIFT, -1, top, 0, 0);
if (cm->menu_master_passwd) {
ok = ask_passwd(NULL);
clear_screen();
draw_menu(-1, top, 0);
} else {
/* Erase [Tab] message and help text */
printf("\033[%d;1H\1#0\033[K", TABMSG_ROW);
display_help(NULL);
}
if (ok) {
cmdline = edit_cmdline(me->cmdline, top);
done = !!cmdline;
clear = 1; /* In case we hit [Esc] and done is null */
} else {
draw_row(entry - top + 4 + VSHIFT, entry, top, 0, 0);
}
}
break;
case KEY_CTRL('C'): /* Ctrl-C */
case KEY_ESC: /* Esc */
if (cm->parent) {
cm = cm->parent;
clear = 2;
entry = cm->curentry;
top = cm->curtop;
} else if (cm->allowedit) {
done = 1;
clear = 1;
key_timeout = 0;
draw_row(entry - top + 4 + VSHIFT, -1, top, 0, 0);
if (cm->menu_master_passwd)
done = ask_passwd(NULL);
}
break;
default:
if (key > 0 && key < 0xFF) {
key &= ~0x20; /* Upper case */
if (cm->menu_hotkeys[key]) {
key_timeout = 0;
entry = cm->menu_hotkeys[key]->entry;
/* Should we commit at this point? */
hotkey = true;
}
}
break;
}
}
printf("\033[?25h"); /* Show cursor */
/* Return the label name so localboot and ipappend work */
return cmdline;
}