/* ----------------------------------------------------------------------- *
*
* Copyright 2010 Intel Corp. - All Rights Reserved
*
* 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, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* syslxopt.c
*
* parse cmdline for extlinux and syslinux installer
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <sysexits.h>
#include "version.h"
#include "syslxcom.h"
#include "syslxfs.h"
#include "syslxopt.h"
/* These are the options we can set their values */
struct sys_options opt = {
.sectors = 0,
.heads = 0,
.raid_mode = 0,
.stupid_mode = 0,
.reset_adv = 0,
.set_once = NULL,
.update_only = -1,
.directory = NULL,
.device = NULL,
.offset = 0,
.menu_save = NULL,
.install_mbr = 0,
.activate_partition = 0,
.force = 0,
.bootsecfile = NULL,
};
const struct option long_options[] = {
{"force", 0, NULL, 'f'}, /* DOS/Win32/mtools only */
{"install", 0, NULL, 'i'},
{"directory", 1, NULL, 'd'},
{"offset", 1, NULL, 't'},
{"update", 0, NULL, 'U'},
{"zipdrive", 0, NULL, 'z'},
{"sectors", 1, NULL, 'S'},
{"stupid", 0, NULL, 's'},
{"heads", 1, NULL, 'H'},
{"raid-mode", 0, NULL, 'r'},
{"version", 0, NULL, 'v'},
{"help", 0, NULL, 'h'},
{"once", 1, NULL, OPT_ONCE},
{"clear-once", 0, NULL, 'O'},
{"reset-adv", 0, NULL, OPT_RESET_ADV},
{"menu-save", 1, NULL, 'M'},
{"mbr", 0, NULL, 'm'}, /* DOS/Win32 only */
{"active", 0, NULL, 'a'}, /* DOS/Win32 only */
{"device", 1, NULL, OPT_DEVICE},
{NULL, 0, NULL, 0}
};
const char short_options[] = "t:fid:UuzsS:H:rvho:OM:ma";
void __attribute__ ((noreturn)) usage(int rv, enum syslinux_mode mode)
{
switch (mode) {
case MODE_SYSLINUX:
/* For unmounted fs installation (syslinux) */
fprintf(stderr,
"Usage: %s [options] device\n"
" --offset -t Offset of the file system on the device \n"
" --directory -d Directory for installation target\n",
program);
break;
case MODE_EXTLINUX:
/* Mounted fs installation (extlinux) */
/* Actually extlinux can also use -d to provide a directory too... */
fprintf(stderr,
"Usage: %s [options] directory\n"
" --device Force use of a specific block device (experts only)\n",
program);
break;
case MODE_SYSLINUX_DOSWIN:
/* For fs installation under Windows (syslinux.exe) */
fprintf(stderr,
"Usage: %s [options] <drive>: [bootsecfile]\n"
" --directory -d Directory for installation target\n",
program);
break;
}
fprintf(stderr,
" --install -i Install over the current bootsector\n"
" --update -U Update a previous installation\n"
" --zip -z Force zipdrive geometry (-H 64 -S 32)\n"
" --sectors=# -S Force the number of sectors per track\n"
" --heads=# -H Force number of heads\n"
" --stupid -s Slow, safe and stupid mode\n"
" --raid -r Fall back to the next device on boot failure\n"
" --once=... %s Execute a command once upon boot\n"
" --clear-once -O Clear the boot-once command\n"
" --reset-adv Reset auxilliary data\n",
mode == MODE_SYSLINUX ? " " : "-o");
/*
* Have to chop this roughly in half for the DOS installer due
* to limited output buffer size
*/
fprintf(stderr,
" --menu-save= -M Set the label to select as default on the next boot\n");
if (mode == MODE_SYSLINUX_DOSWIN)
fprintf(stderr,
" --mbr -m Install an MBR\n"
" --active -a Mark partition as active\n");
if (mode == MODE_SYSLINUX_DOSWIN || mode == MODE_SYSLINUX)
fprintf(stderr,
" --force -f Ignore precautions\n");
exit(rv);
}
void parse_options(int argc, char *argv[], enum syslinux_mode mode)
{
int o;
program = argv[0];
while ((o = getopt_long(argc, argv, short_options,
long_options, NULL)) != EOF) {
switch (o) {
case 'f':
opt.force = 1;
break;
case 'z':
opt.heads = 64;
opt.sectors = 32;
break;
case 'S':
opt.sectors = strtoul(optarg, NULL, 0);
if (opt.sectors < 1 || opt.sectors > 63) {
fprintf(stderr,
"%s: invalid number of sectors: %u (must be 1-63)\n",
program, opt.sectors);
exit(EX_USAGE);
}
break;
case 'H':
opt.heads = strtoul(optarg, NULL, 0);
if (opt.heads < 1 || opt.heads > 256) {
fprintf(stderr,
"%s: invalid number of heads: %u (must be 1-256)\n",
program, opt.heads);
exit(EX_USAGE);
}
break;
case 'r':
opt.raid_mode = 1;
break;
case 's':
opt.stupid_mode = 1;
break;
case 'i':
opt.update_only = 0;
break;
case 'u':
case 'U':
opt.update_only = 1;
break;
case 'h':
usage(0, mode);
break;
case 'o':
if (mode == MODE_SYSLINUX) {
fprintf(stderr, "%s: -o will change meaning in a future version, use -t or --offset\n", program);
goto opt_offset;
}
/* else fall through */
case OPT_ONCE:
opt.set_once = optarg;
break;
case 't':
opt_offset:
opt.offset = strtoul(optarg, NULL, 0);
break;
case 'O':
opt.set_once = "";
break;
case 'd':
opt.directory = optarg;
break;
case OPT_RESET_ADV:
opt.reset_adv = 1;
break;
case 'M':
opt.menu_save = optarg;
break;
case 'm':
opt.install_mbr = 1;
break;
case 'a':
opt.activate_partition = 1;
break;
case OPT_DEVICE:
if (mode != MODE_EXTLINUX)
usage(EX_USAGE, mode);
opt.device = optarg;
break;
case 'v':
fprintf(stderr,
"%s " VERSION_STR " Copyright 1994-" YEAR_STR
" H. Peter Anvin et al\n", program);
exit(0);
default:
fprintf(stderr, "%s: Unknown option: -%c\n", program, optopt);
usage(EX_USAGE, mode);
}
}
switch (mode) {
case MODE_SYSLINUX:
case MODE_SYSLINUX_DOSWIN:
opt.device = argv[optind++];
break;
case MODE_EXTLINUX:
if (!opt.directory)
opt.directory = argv[optind++];
break;
}
if (argv[optind] && (mode == MODE_SYSLINUX_DOSWIN))
/* Allow for the boot-sector argument */
opt.bootsecfile = argv[optind++];
if (argv[optind])
usage(EX_USAGE, mode); /* Excess arguments */
}
/*
* Make any user-specified ADV modifications in memory
*/
int modify_adv(void)
{
int rv = 0;
if (opt.reset_adv)
syslinux_reset_adv(syslinux_adv);
if (opt.set_once) {
if (syslinux_setadv(ADV_BOOTONCE, strlen(opt.set_once), opt.set_once)) {
fprintf(stderr, "%s: not enough space for boot-once command\n",
program);
rv = -1;
}
}
if (opt.menu_save) {
if (syslinux_setadv(ADV_MENUSAVE, strlen(opt.menu_save), opt.menu_save)) {
fprintf(stderr, "%s: not enough space for menu-save label\n",
program);
rv = -1;
}
}
return rv;
}