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Diffstat (limited to 'libinstaller/syslxopt.c')
-rw-r--r-- | libinstaller/syslxopt.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/libinstaller/syslxopt.c b/libinstaller/syslxopt.c new file mode 100644 index 0000000..3fc5519 --- /dev/null +++ b/libinstaller/syslxopt.c @@ -0,0 +1,275 @@ +/* ----------------------------------------------------------------------- * + * + * 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; +} |