libinstaller/syslxopt.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2010 Intel Corp. - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * syslxopt.c
  15  *
  16  * parse cmdline for extlinux and syslinux installer
  17  *
  18  */
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <stddef.h>
  22 #include <stdint.h>
  23 #include <string.h>
  24 #include <getopt.h>
  25 #include <sysexits.h>
  26 #include "../version.h"
  27 #include "syslxcom.h"
  28 #include "syslxopt.h"
  29
  30 /* These are the options we can set their values */
  31 struct sys_options opt = {
  32     .sectors = 0,
  33     .heads = 0,
  34     .raid_mode = 0,
  35     .stupid_mode = 0,
  36     .reset_adv = 0,
  37     .set_once = NULL,
  38     .update_only = -1,
  39     .directory = NULL,
  40     .device = NULL,
  41     .offset = 0,
  42     .menu_save = NULL,
  43     .install_mbr = 0,
  44     .activate_partition = 0,
  45     .force = 0,
  46     .bootsecfile = NULL,
  47 };
  48
  49 const struct option long_options[] = {
  50     {"force", 0, NULL, 'f'},    /* DOS/Win32/mtools only */
  51     {"install", 0, NULL, 'i'},
  52     {"directory", 1, NULL, 'd'},
  53     {"offset", 1, NULL, 't'},
  54     {"update", 0, NULL, 'U'},
  55     {"zipdrive", 0, NULL, 'z'},
  56     {"sectors", 1, NULL, 'S'},
  57     {"stupid", 0, NULL, 's'},
  58     {"heads", 1, NULL, 'H'},
  59     {"raid-mode", 0, NULL, 'r'},
  60     {"version", 0, NULL, 'v'},
  61     {"help", 0, NULL, 'h'},
  62     {"once", 1, NULL, OPT_ONCE},
  63     {"clear-once", 0, NULL, 'O'},
  64     {"reset-adv", 0, NULL, OPT_RESET_ADV},
  65     {"menu-save", 1, NULL, 'M'},
  66     {"mbr", 0, NULL, 'm'},      /* DOS/Win32 only */
  67     {"active", 0, NULL, 'a'},   /* DOS/Win32 only */
  68     {0, 0, 0, 0}
  69 };
  70
  71 const char short_options[] = "t:fid:UuzS:H:rvho:OM:ma";
  72
  73 void __attribute__ ((noreturn)) usage(int rv, enum syslinux_mode mode)
  74 {
  75     switch (mode) {
  76     case MODE_SYSLINUX:
  77         /* For unmounted fs installation (syslinux) */
  78         fprintf(stderr,
  79             "Usage: %s [options] device\n"
  80             "  --offset     -t  Offset of the file system on the device \n"
  81             "  --directory  -d  Directory for installation target\n",
  82             program);
  83         break;
  84
  85     case MODE_EXTLINUX:
  86         /* Mounted fs installation (extlinux) */
  87         /* Actually extlinux can also use -d to provide a directory too... */
  88         fprintf(stderr,
  89             "Usage: %s [options] directory\n",
  90             program);
  91         break;
  92
  93     case MODE_SYSLINUX_DOSWIN:
  94         /* For fs installation under Windows (syslinux.exe) */
  95         fprintf(stderr,
  96             "Usage: %s [options] <drive>: [bootsecfile]\n"
  97             "  --directory  -d  Directory for installation target\n",
  98             program);
  99         break;
 100     }
 101
 102     fprintf(stderr,
 103             "  --install    -i  Install over the current bootsector\n"
 104             "  --update     -U  Update a previous EXTLINUX installation\n"
 105             "  --zip        -z  Force zipdrive geometry (-H 64 -S 32)\n"
 106             "  --sectors=#  -S  Force the number of sectors per track\n"
 107             "  --heads=#    -H  Force number of heads\n"
 108             "  --stupid     -s  Slow, safe and stupid mode\n"
 109             "  --raid       -r  Fall back to the next device on boot failure\n"
 110             "  --once=...   %s  Execute a command once upon boot\n"
 111             "  --clear-once -O  Clear the boot-once command\n"
 112             "  --reset-adv      Reset auxilliary data\n",
 113             mode == MODE_SYSLINUX  ? "  " : "-o");
 114     /* Have to chop this roughly in half for the DOS installer for some reason */
 115     fprintf(stderr,
 116             "  --menu-save= -M  Set the label to select as default on the next boot\n"
 117             "  --mbr        -m  Install an MBR (DOS/Win32 installers only)\n"
 118             "  --active     -a  Mark partition as active (DOS/Win32 installers only)\n"
 119             "  --force      -f  Ignore precautions (DOS/Win32/mtools installers only)\n"
 120             "\n"
 121             "  Note: geometry is determined at boot time for devices which\n"
 122             "  are considered hard disks by the BIOS.  Unfortunately, this is\n"
 123             "  not possible for devices which are considered floppy disks,\n"
 124             "  which includes zipdisks and LS-120 superfloppies.\n"
 125             "\n"
 126             "  The -z option is useful for USB devices which are considered\n"
 127             "  hard disks by some BIOSes and zipdrives by other BIOSes.");
 128
 129     exit(rv);
 130 }
 131
 132 void parse_options(int argc, char *argv[], enum syslinux_mode mode)
 133 {
 134     int o;
 135
 136     program = argv[0];
 137     while ((o = getopt_long(argc, argv, short_options,
 138                             long_options, NULL)) != EOF) {
 139         switch (o) {
 140         case 'f':
 141             opt.force = 1;
 142             break;
 143         case 'z':
 144             opt.heads = 64;
 145             opt.sectors = 32;
 146             break;
 147         case 'S':
 148             opt.sectors = strtoul(optarg, NULL, 0);
 149             if (opt.sectors < 1 || opt.sectors > 63) {
 150                 fprintf(stderr,
 151                         "%s: invalid number of sectors: %u (must be 1-63)\n",
 152                         program, opt.sectors);
 153                 exit(EX_USAGE);
 154             }
 155             break;
 156         case 'H':
 157             opt.heads = strtoul(optarg, NULL, 0);
 158             if (opt.heads < 1 || opt.heads > 256) {
 159                 fprintf(stderr,
 160                         "%s: invalid number of heads: %u (must be 1-256)\n",
 161                         program, opt.heads);
 162                 exit(EX_USAGE);
 163             }
 164             break;
 165         case 'r':
 166             opt.raid_mode = 1;
 167             break;
 168         case 's':
 169             opt.stupid_mode = 1;
 170             break;
 171         case 'i':
 172             opt.update_only = 0;
 173             break;
 174         case 'u':
 175         case 'U':
 176             opt.update_only = 1;
 177             break;
 178         case 'h':
 179             usage(0, mode);
 180             break;
 181         case 'o':
 182             if (mode == MODE_SYSLINUX) {
 183                 fprintf(stderr, "%s: -o will change meaning in a future version, use -t or --offset\n", program);
 184                 goto opt_offset;
 185             }
 186             /* else fall through */
 187         case OPT_ONCE:
 188             opt.set_once = optarg;
 189             break;
 190         case 't':
 191         opt_offset:
 192             opt.offset = strtoul(optarg, NULL, 0);
 193             break;
 194         case 'O':
 195             opt.set_once = "";
 196             break;
 197         case 'd':
 198             opt.directory = optarg;
 199             break;
 200         case OPT_RESET_ADV:
 201             opt.reset_adv = 1;
 202             break;
 203         case 'M':
 204             opt.menu_save = optarg;
 205             break;
 206         case 'm':
 207             opt.install_mbr = 1;
 208             break;
 209         case 'a':
 210             opt.activate_partition = 1;
 211             break;
 212         case 'v':
 213             fprintf(stderr,
 214                     "%s " VERSION_STR "  Copyright 1994-" YEAR_STR
 215                     " H. Peter Anvin et al\n", program);
 216             exit(0);
 217         default:
 218             fprintf(stderr, "%s: Unknown option: -%c\n", program, optopt);
 219             usage(EX_USAGE, mode);
 220         }
 221     }
 222
 223     switch (mode) {
 224     case MODE_SYSLINUX:
 225     case MODE_SYSLINUX_DOSWIN:
 226         opt.device = argv[optind++];
 227         break;
 228     case MODE_EXTLINUX:
 229         if (!opt.directory)
 230             opt.directory = argv[optind++];
 231         break;
 232     }
 233
 234     if (argv[optind] && (mode == MODE_SYSLINUX_DOSWIN))
 235         /* Allow for the boot-sector argument */
 236         opt.bootsecfile = argv[optind++];
 237     if (argv[optind])
 238         usage(EX_USAGE, mode);  /* Excess arguments */
 239 }
 240
 241 /*
 242  * Make any user-specified ADV modifications in memory
 243  */
 244 int modify_adv(void)
 245 {
 246     int rv = 0;
 247
 248     if (opt.reset_adv)
 249         syslinux_reset_adv(syslinux_adv);
 250
 251     if (opt.set_once) {
 252         if (syslinux_setadv(ADV_BOOTONCE, strlen(opt.set_once), opt.set_once)) {
 253             fprintf(stderr, "%s: not enough space for boot-once command\n",
 254                     program);
 255             rv = -1;
 256         }
 257     }
 258     if (opt.menu_save) {
 259         if (syslinux_setadv(ADV_MENUSAVE, strlen(opt.menu_save), opt.menu_save)) {
 260             fprintf(stderr, "%s: not enough space for menu-save label\n",
 261                     program);
 262             rv = -1;
 263         }
 264     }
 265
 266     return rv;
 267 }