vbatts
/
elilo
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
elilo/choosers/simple.c

412 lines
9.9 KiB
C
Raw Blame History

/*
* Copyright (C) 2001-2003 Hewlett-Packard Co.
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
*
* This file is part of the ELILO, the EFI Linux boot loader.
*
* ELILO 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, or (at your option)
* any later version.
*
* ELILO 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 ELILO; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Please check out the elilo.txt for complete documentation on how
* to use this program.
*/
#include <efi.h>
#include <efilib.h>
#include "elilo.h"
#include "vars.h"
/* static is ugly but does the job here! */
static CHAR16 **alt_argv;
static VOID
display_label_info(CHAR16 *name)
{
CHAR16 *desc;
CHAR16 initrd_name[CMDLINE_MAXLEN];
CHAR16 options_tmp[CMDLINE_MAXLEN];
CHAR16 options[CMDLINE_MAXLEN];
CHAR16 kname[FILENAME_MAXLEN];
desc = find_description(name);
if (desc) {
Print(L"desc : %s\n", desc);
}
initrd_name[0] = options_tmp[0] = kname[0] = CHAR_NULL;
if (find_label(name, kname, options_tmp, initrd_name) == -1) {
StrCpy(kname, name);
Print(L"\n");
}
subst_vars(options_tmp, options, CMDLINE_MAXLEN);
Print(L"cmdline: %s %s\n", kname, options);
if (initrd_name[0]) Print(L"initrd : %s\n", initrd_name);
}
static VOID
print_infos(int force)
{
CHAR16 *config_file;
CHAR16 dpath[FILENAME_MAXLEN];
CHAR16 *boot_dev_name;
UINT8 is_abs;
boot_dev_name = fops_bootdev_name();
config_file = get_config_file();
fops_getdefault_path(dpath, FILENAME_MAXLEN);
if (force || elilo_opt.verbose > 0)
Print(L"default file path: %s:%s\n", boot_dev_name, dpath);
is_abs = config_file && (config_file[0] == CHAR_BACKSLASH || config_file[0] == CHAR_SLASH) ? 1 : 0;
if (force || elilo_opt.verbose > 0)
Print(L"config file : %s%s\n", config_file && is_abs == 0 ? dpath : L"", config_file ? config_file : L"none used");
if (alt_argv) {
CHAR16 **p = alt_argv;
Print(L"found alternate default choice :");
while (*p) Print(L" %s", *p++);
Print(L"\n");
}
}
static VOID
print_help(int force)
{
if (force || elilo_opt.verbose > 0)
Print(L"command list (must be first character):\n=:print device list, %%:print variable list, &:print paths, ?:help\nTAB:print label information\n");
}
/*
* interactively select a kernel image and options.
* The kernel can be an actual filename or a label in the config file
* Return:
* -1: if unsucessful
* 0: otherwise
*/
static INTN
select_kernel(CHAR16 *buffer, INTN size)
{
#define CHAR_CTRL_C L'\003' /* Unicode CTRL-C */
#define CHAR_CTRL_D L'\004' /* Unicode CTRL-D */
#define CHAR_CTRL_U L'\025' /* Unicode CTRL-U */
//#define CHAR_TAB L'\t'
SIMPLE_INPUT_INTERFACE *ip = systab->ConIn;
EFI_INPUT_KEY key;
EFI_STATUS status;
INTN pos = 0, ret;
INT8 first_time = 1;
/*
* let's give some help first
*/
print_help(0);
print_infos(0);
reprint:
buffer[pos] = CHAR_NULL;
Print(L"\nELILO boot: %s", buffer);
/*
* autoboot with default choice after timeout expires
*/
if (first_time && (ret=wait_timeout(elilo_opt.timeout)) != 1) {
return ret == -1 ? -1: 0;
}
first_time = 0;
for (;;) {
while ((status=ip->ReadKeyStroke(ip, &key)) == EFI_NOT_READY);
if (EFI_ERROR(status)) {
ERR_PRT((L"select_kernel readkey: %r", status));
return -1;
}
switch (key.UnicodeChar) {
case CHAR_TAB:
Print(L"\n");
if (pos == 0) {
print_label_list();
Print(L"(or a kernel file name: [[dev_name:/]path/]kernel_image cmdline options)\n");
} else {
buffer[pos] = CHAR_NULL;
display_label_info(buffer);
}
goto reprint;
case L'%':
if (pos>0) goto normal_char;
Print(L"\n");
print_vars();
goto reprint;
case L'?':
if (pos>0) goto normal_char;
Print(L"\n");
print_help(1);
goto reprint;
case L'&':
if (pos>0) goto normal_char;
Print(L"\n");
print_infos(1);
goto reprint;
case L'=':
if (pos>0) goto normal_char;
Print(L"\n");
print_devices();
goto reprint;
case CHAR_BACKSPACE:
if (pos == 0) break;
pos--;
Print(L"\b \b");
break;
case CHAR_CTRL_U: /* clear line */
while (pos) {
Print(L"\b \b");
pos--;
}
break;
case CHAR_CTRL_C: /* kill line */
pos = 0;
goto reprint;
case CHAR_LINEFEED:
case CHAR_CARRIAGE_RETURN:
buffer[pos] = CHAR_NULL;
Print(L"\n");
return 0;
default:
normal_char:
if (key.UnicodeChar == CHAR_CTRL_D || key.ScanCode == 0x17 ) {
Print(L"\nGiving up then...\n");
return -1;
}
if (key.UnicodeChar == CHAR_NULL) break;
if (pos > size-1) break;
buffer[pos++] = key.UnicodeChar;
/* Write the character out */
Print(L"%c", key.UnicodeChar);
}
}
return 0;
}
static VOID
display_message(VOID)
{
fops_fd_t fd;
EFI_STATUS status;
INTN len, i;
CHAR16 *filename;
CHAR8 buf[256];
if ((filename = get_message_filename(0)) == NULL) return;
if (*filename == CHAR_NULL) return;
VERB_PRT(3, Print(L"opening message file %s\n", filename));
status = fops_open(filename, &fd);
if (EFI_ERROR(status)) {
VERB_PRT(3, Print(L"message file %s not found\n", filename));
return;
}
len = 256;
Print(L"\n");
while ((status = fops_read(fd, buf, &len)) == EFI_SUCCESS) {
/* XXX: ugly ! */
for (i=0; i < len; i++) {
Print(L"%c", (CHAR16)buf[i]);
}
if (len < 256) break;
}
fops_close(fd);
}
static INTN
simple_choose(CHAR16 **argv, INTN argc, INTN index, CHAR16 *kname, CHAR16 *cmdline)
{
# define BOOT_IMG_STR L"BOOT_IMAGE="
CHAR16 buffer[CMDLINE_MAXLEN];
CHAR16 alt_buffer[CMDLINE_MAXLEN];
CHAR16 initrd_name[CMDLINE_MAXLEN];
CHAR16 args[CMDLINE_MAXLEN];
CHAR16 devname[CMDLINE_MAXLEN];
CHAR16 dpath[FILENAME_MAXLEN];
CHAR16 *slash_pos, *colon_pos, *backslash_pos;
UINTN len;
INTN ret;
buffer[0] = alt_buffer[0] = CHAR_NULL;
display_message();
restart:
initrd_name[0] = kname[0] = cmdline[0] = args[0] = CHAR_NULL;
/* reset per image loader options */
Memset(&elilo_opt.img_opt, 0, sizeof(elilo_opt.img_opt));
/*
* check for alternate kernel image and params in EFI variable
*/
if (elilo_opt.alt_check && alternate_kernel(alt_buffer, sizeof(alt_buffer)) == 0) {
argc = argify(alt_buffer,sizeof(alt_buffer), argv);
alt_argv = argv;
index = 0;
args[0] = initrd_name[0] = 0;
/*
* don't check twice because the variable is deleted after
* first access
*/
elilo_opt.alt_check = 0;
}
if (elilo_opt.prompt) {
ret = select_kernel(buffer, sizeof(buffer));
if (ret == -1) return -1;
argc = argify(buffer,sizeof(buffer), argv);
index = 0;
}
/*
* if we found an alternate choice and the user
* did not force it manually, then use the alternate
* option.
*/
if (alt_buffer[0] && buffer[0] == CHAR_NULL) {
StrCpy(buffer, alt_buffer);
}
/*
* First search for matching label in the config file
* if options were specified on command line, they take
* precedence over the ones in the config file
*
* if no match is found, the args and initrd arguments may
* still be modified by global options in the config file.
*/
ret = find_label(argv[index], kname, args, initrd_name);
/*
* not found, so assume first argument is kernel name and
* not label name
*/
if (ret == -1) {
if (argv[index])
StrCpy(kname, argv[index]);
else
StrCpy(kname, elilo_opt.default_kernel);
}
/*
* no matter what happened for kname, if user specified
* additional options, they override the ones in the
* config file
*/
if (argc > 1+index) {
/*StrCpy(args, argv[++index]);*/
while (++index < argc) {
StrCat(args, L" ");
StrCat(args, argv[index]);
}
}
/*
* if initrd specified on command line, it overrides
* the one defined in config file, if any
*/
if (elilo_opt.initrd[0] == CHAR_NULL && initrd_name[0] != CHAR_NULL) {
StrCpy(elilo_opt.initrd, initrd_name);
}
VERB_PRT(1, { Print(L"kernel is '%s'\n", kname);
Print(L"arguments are '%s'\n", args);
if (elilo_opt.initrd[0]) Print(L"initrd is '%s'\n", elilo_opt.initrd);
});
if (elilo_opt.prompt == 0) {
/* minimal printing */
Print(L"ELILO\n");
ret = wait_timeout(elilo_opt.delay);
if (ret != 0) {
elilo_opt.prompt = 1;
elilo_opt.initrd[0] = CHAR_NULL;
elilo_opt.timeout = ELILO_TIMEOUT_INFINITY;
goto restart;
}
}
/*
* add the device name, if not already specified,
* so that we know where we came from
*/
slash_pos = StrChr(kname, L'/');
backslash_pos = StrChr(kname, L'\\');
colon_pos = StrChr(kname, L':');
if (backslash_pos && backslash_pos < slash_pos) slash_pos = backslash_pos;
if (colon_pos == NULL || (slash_pos && (slash_pos < colon_pos))) {
StrCpy(devname, fops_bootdev_name());
StrCat(devname, L":");
/* the default path is always terminated with a separator */
if (kname[0] != L'/' && kname[0] != L'\\') {
fops_getdefault_path(dpath,FILENAME_MAXLEN);
StrCat(devname, dpath);
}
} else {
devname[0] = CHAR_NULL;
}
/*
* create final argument list to the kernel
*/
len = StrLen(BOOT_IMG_STR) /* BOOT_IMAGE= */
+StrLen(devname) /* device name */
+StrLen(kname) /* kernel name */
+1 /* space */
+StrLen(args); /* args length */
if (len >= CMDLINE_MAXLEN-1) {
ERR_PRT((L" arguments list too long cannot fit BOOT_IMAGE\n"));
return -1;
}
StrCpy(cmdline, L"BOOT_IMAGE=");
StrCat(cmdline, devname);
StrCat(cmdline, kname);
StrCat(cmdline, L" ");
StrCat(cmdline, args);
return 0;
}
static INTN
simple_probe(EFI_HANDLE dev)
{
/* this chooser always work */
return 0;
}
chooser_t simple_chooser={
L"simple",
simple_probe,
simple_choose
};
Reference in New Issue View Git Blame Copy Permalink