507 lines
18 KiB
C
507 lines
18 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2004,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/legacy_parse.h>
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struct legacy_command
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{
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const char *name;
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const char *map;
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unsigned argc;
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enum arg_type {
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TYPE_VERBATIM,
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TYPE_FORCE_OPTION,
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TYPE_NOAPM_OPTION,
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TYPE_TYPE_OR_NOMEM_OPTION,
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TYPE_FILE,
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TYPE_FILE_NO_CONSUME,
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TYPE_PARTITION,
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TYPE_BOOL,
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TYPE_INT,
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TYPE_REST_VERBATIM
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} argt[4];
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enum {
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FLAG_IGNORE_REST = 1
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} flags;
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const char *shortdesc;
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const char *longdesc;
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};
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struct legacy_command legacy_commands[] =
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{
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{"blocklist", "blocklist '%s'\n", 1, {TYPE_FILE}, 0, "FILE",
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"Print the blocklist notation of the file FILE."},
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{"boot", "boot\n", 0, {}, 0, 0,
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"Boot the OS/chain-loader which has been loaded."},
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/* bootp unsupported. */
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{"cat", "cat '%s'\n", 1, {TYPE_FILE}, 0, "FILE",
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"Print the contents of the file FILE."},
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{"chainloader", "chainloader %s '%s'\n", 2, {TYPE_FORCE_OPTION, TYPE_FILE},
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0, "[--force] FILE",
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"Load the chain-loader FILE. If --force is specified, then load it"
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" forcibly, whether the boot loader signature is present or not."},
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{"cmp", "cmp '%s' '%s'\n", 2, {TYPE_FILE, TYPE_FILE}, FLAG_IGNORE_REST,
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"FILE1 FILE2",
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"Compare the file FILE1 with the FILE2 and inform the different values"
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" if any."},
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{"color", "legacy_color '%s' '%s'\n", 2, {TYPE_VERBATIM, TYPE_VERBATIM},
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FLAG_IGNORE_REST, "NORMAL [HIGHLIGHT]",
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"Change the menu colors. The color NORMAL is used for most"
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" lines in the menu, and the color HIGHLIGHT is used to highlight the"
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" line where the cursor points. If you omit HIGHLIGHT, then the"
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" inverted color of NORMAL is used for the highlighted line."
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" The format of a color is \"FG/BG\". FG and BG are symbolic color names."
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" A symbolic color name must be one of these: black, blue, green,"
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" cyan, red, magenta, brown, light-gray, dark-gray, light-blue,"
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" light-green, light-cyan, light-red, light-magenta, yellow and white."
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" But only the first eight names can be used for BG. You can prefix"
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" \"blink-\" to FG if you want a blinking foreground color."},
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{"configfile", "legacy_configfile '%s'\n", 1, {TYPE_FILE}, 0, "FILE",
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"Load FILE as the configuration file."},
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{"debug",
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"if [ -z \"$debug\" ]; then set debug=all; else set debug=; fi\n",
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0, {}, 0, 0, "Turn on/off the debug mode."},
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{"default",
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"set default='%s'; if [ x\"$default\" = xsaved ]; then load_env; "
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"set default=\"$saved_entry\"; fi\n", 1, {TYPE_VERBATIM}, 0,
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"[NUM | `saved']",
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"Set the default entry to entry number NUM (if not specified, it is"
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" 0, the first entry) or the entry number saved by savedefault."},
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/* dhcp unsupported. */
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/* displayapm unsupported. */
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{"displaymem", "lsmmap\n", 0, {}, 0, 0,
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"Display what GRUB thinks the system address space map of the"
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" machine is, including all regions of physical RAM installed."},
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/* embed unsupported. */
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{"fallback", "set fallback='%s'\n", 1, {TYPE_VERBATIM}, 0, "NUM...",
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"Go into unattended boot mode: if the default boot entry has any"
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" errors, instead of waiting for the user to do anything, it"
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" immediately starts over using the NUM entry (same numbering as the"
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" `default' command). This obviously won't help if the machine"
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" was rebooted by a kernel that GRUB loaded."},
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{"find", "search -sf '%s'\n", 1, {TYPE_FILE}, 0, "FILENAME",
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"Search for the filename FILENAME in all of partitions and print the list of"
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" the devices which contain the file."},
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/* fstest unsupported. */
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/* geometry unsupported. */
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{"halt", "halt %s\n", 1, {TYPE_NOAPM_OPTION}, 0, "[--no-apm]",
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"Halt your system. If APM is available on it, turn off the power using"
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" the APM BIOS, unless you specify the option `--no-apm'."},
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/* help unsupported. */ /* NUL_TERMINATE */
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/* hiddenmenu unsupported. */
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{"hide", "parttool '%s' hidden+\n", 1, {TYPE_PARTITION}, 0, "PARTITION",
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"Hide PARTITION by setting the \"hidden\" bit in"
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" its partition type code."},
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/* ifconfig unsupported. */
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/* impsprobe unsupported. */
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/* FIXME: dublicate multiboot filename. */
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{"initrd", "legacy_initrd '%s' %s\n", 2, {TYPE_FILE_NO_CONSUME,
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TYPE_REST_VERBATIM}, 0,
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"FILE [ARG ...]",
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"Load an initial ramdisk FILE for a Linux format boot image and set the"
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" appropriate parameters in the Linux setup area in memory."},
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/* install unsupported. */
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/* ioprobe unsupported. */
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/* FIXME: really support --no-mem-option. */
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/* FIXME: dublicate multiboot filename. */
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{"kernel", "legacy_kernel %s %s '%s' %s\n", 4, {TYPE_TYPE_OR_NOMEM_OPTION,
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TYPE_TYPE_OR_NOMEM_OPTION,
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TYPE_FILE_NO_CONSUME,
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TYPE_REST_VERBATIM}, 0,
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"[--no-mem-option] [--type=TYPE] FILE [ARG ...]",
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"Attempt to load the primary boot image from FILE. The rest of the"
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" line is passed verbatim as the \"kernel command line\". Any modules"
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" must be reloaded after using this command. The option --type is used"
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" to suggest what type of kernel to be loaded. TYPE must be either of"
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" \"netbsd\", \"freebsd\", \"openbsd\", \"linux\", \"biglinux\" and"
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" \"multiboot\". The option --no-mem-option tells GRUB not to pass a"
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" Linux's mem option automatically."},
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/* lock is unsupported. */
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{"makeactive", "parttool \"$root\" boot+\n", 0, {}, 0, 0,
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"Set the active partition on the root disk to GRUB's root device."
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" This command is limited to _primary_ PC partitions on a hard disk."},
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{"map", "drivemap '%s' '%s'\n", 2, {TYPE_PARTITION, TYPE_PARTITION},
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FLAG_IGNORE_REST, "TO_DRIVE FROM_DRIVE",
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"Map the drive FROM_DRIVE to the drive TO_DRIVE. This is necessary"
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" when you chain-load some operating systems, such as DOS, if such an"
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" OS resides at a non-first drive."},
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/* md5crypt unsupported. */
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{"module", "legacy_initrd '%s' %s\n", 1, {TYPE_FILE_NO_CONSUME,
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TYPE_REST_VERBATIM}, 0,
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"FILE [ARG ...]",
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"Load a boot module FILE for a Multiboot format boot image (no"
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" interpretation of the file contents is made, so users of this"
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" command must know what the kernel in question expects). The"
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" rest of the line is passed as the \"module command line\", like"
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" the `kernel' command."},
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/* modulenounzip unsupported. */
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/* FIXME: allow toggle. */
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{"pager", "set pager=%d\n", 1, {TYPE_BOOL}, 0, "[FLAG]",
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"Toggle pager mode with no argument. If FLAG is given and its value"
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" is `on', turn on the mode. If FLAG is `off', turn off the mode."},
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/* partnew unsupported. */
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{"parttype", "parttool '%s' type=%s\n", 2, {TYPE_PARTITION, TYPE_INT}, 0,
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"PART TYPE", "Change the type of the partition PART to TYPE."},
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/* password unsupported. */ /* NUL_TERMINATE */
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/* pause unsupported. */
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/* rarp unsupported. */
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{"read", "read_dword %s\n", 1, {TYPE_INT}, 0, "ADDR",
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"Read a 32-bit value from memory at address ADDR and"
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" display it in hex format."},
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{"reboot", "reboot\n", 0, {}, 0, 0, "Reboot your system."},
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/* FIXME: Support HDBIAS. */
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/* FIXME: Support printing. */
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{"root", "set root='%s'\n", 1, {TYPE_PARTITION}, 0, "[DEVICE [HDBIAS]]",
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"Set the current \"root device\" to the device DEVICE, then"
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" attempt to mount it to get the partition size (for passing the"
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" partition descriptor in `ES:ESI', used by some chain-loaded"
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" bootloaders), the BSD drive-type (for booting BSD kernels using"
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" their native boot format), and correctly determine "
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" the PC partition where a BSD sub-partition is located. The"
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" optional HDBIAS parameter is a number to tell a BSD kernel"
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" how many BIOS drive numbers are on controllers before the current"
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" one. For example, if there is an IDE disk and a SCSI disk, and your"
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" FreeBSD root partition is on the SCSI disk, then use a `1' for HDBIAS."},
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{"rootnoverify", "set root='%s'\n", 1, {TYPE_PARTITION}, 0,
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"[DEVICE [HDBIAS]]",
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"Similar to `root', but don't attempt to mount the partition. This"
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" is useful for when an OS is outside of the area of the disk that"
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" GRUB can read, but setting the correct root device is still"
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" desired. Note that the items mentioned in `root' which"
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" derived from attempting the mount will NOT work correctly."},
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/* FIXME: support arguments. */
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{"savedefault", "saved_entry=${chosen}; save_env saved_entry\n", 0, {}, 0,
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"[NUM | `fallback']",
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"Save the current entry as the default boot entry if no argument is"
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" specified. If a number is specified, this number is saved. If"
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" `fallback' is used, next fallback entry is saved."},
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{"serial", "serial %s\n", 1, {TYPE_REST_VERBATIM}, 0,
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"[--unit=UNIT] [--port=PORT] [--speed=SPEED] [--word=WORD] "
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"[--parity=PARITY] [--stop=STOP] [--device=DEV]",
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"Initialize a serial device. UNIT is a digit that specifies which serial"
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" device is used (e.g. 0 == COM1). If you need to specify the port number,"
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" set it by --port. SPEED is the DTE-DTE speed. WORD is the word length,"
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" PARITY is the type of parity, which is one of `no', `odd' and `even'."
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" STOP is the length of stop bit(s). The option --device can be used only"
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" in the grub shell, which specifies the file name of a tty device. The"
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" default values are COM1, 9600, 8N1."},
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/* setkey unsupported. */ /* NUL_TERMINATE */
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/* setup unsupported. */
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/* terminal unsupported. */ /* NUL_TERMINATE */
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/* terminfo unsupported. */ /* NUL_TERMINATE */
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{"testload", "cat '%s'\n", 1, {TYPE_FILE}, 0, "FILE",
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"Read the entire contents of FILE in several different ways and"
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" compares them, to test the filesystem code. "
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" If this test succeeds, then a good next"
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" step is to try loading a kernel."},
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/* testvbe unsupported. */
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/* tftpserver unsupported. */
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{"timeout", "set timeout=%s\n", 1, {TYPE_INT}, 0, "SEC",
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"Set a timeout, in SEC seconds, before automatically booting the"
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" default entry (normally the first entry defined)."},
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/* title is handled separately. */
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{"unhide", "parttool '%s' hidden-\n", 1, {TYPE_PARTITION}, 0, "PARTITION",
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"Unhide PARTITION by clearing the \"hidden\" bit in its"
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" partition type code."},
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/* uppermem unsupported. */
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{"uuid", "search -u '%s'\n", 1, {TYPE_VERBATIM}, 0, "UUID",
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"Find root by UUID"},
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/* vbeprobe unsupported. */
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};
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char *
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grub_legacy_escape (const char *in, grub_size_t len)
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{
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const char *ptr;
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char *ret, *outptr;
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int overhead = 0;
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for (ptr = in; ptr < in + len && *ptr; ptr++)
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if (*ptr == '\'' || *ptr == '\\')
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overhead++;
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ret = grub_malloc (ptr - in + overhead);
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if (!ret)
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return NULL;
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outptr = ret;
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for (ptr = in; ptr < in + len && *ptr; ptr++)
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{
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if (*ptr == '\'' || *ptr == '\\')
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*outptr++ = '\\';
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*outptr++ = *ptr;
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}
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*outptr++ = 0;
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return ret;
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}
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static char *
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adjust_file (const char *in, grub_size_t len)
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{
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const char *comma, *ptr, *rest;
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char *ret, *outptr;
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int overhead = 0;
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int part;
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if (in[0] != '(')
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return grub_legacy_escape (in, len);
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for (ptr = in + 1; ptr < in + len && *ptr && *ptr != ')'
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&& *ptr != ','; ptr++)
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if (*ptr == '\'' || *ptr == '\\')
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overhead++;
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comma = ptr;
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if (*comma != ',')
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return grub_legacy_escape (in, len);
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part = grub_strtoull (comma + 1, (char **) &rest, 0);
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for (ptr = rest; ptr < in + len && *ptr; ptr++)
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if (*ptr == '\'' || *ptr == '\\')
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overhead++;
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/* 30 is enough for any number. */
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ret = grub_malloc (ptr - in + overhead + 30);
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if (!ret)
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return NULL;
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outptr = ret;
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for (ptr = in; ptr < in + len && ptr <= comma; ptr++)
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{
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if (*ptr == '\'' || *ptr == '\\')
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*outptr++ = '\\';
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*outptr++ = *ptr;
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}
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grub_snprintf (outptr, 30, "%d", part + 1);
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while (*outptr)
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outptr++;
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for (ptr = rest; ptr < in + len; ptr++)
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{
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if (*ptr == '\'' || *ptr == '\\')
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*outptr++ = '\\';
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*outptr++ = *ptr;
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}
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*outptr = 0;
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return ret;
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}
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static int
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check_option (const char *a, char *b, grub_size_t len)
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{
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if (grub_strlen (b) != len)
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return 0;
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return grub_strncmp (a, b, len) == 0;
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}
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static int
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is_option (enum arg_type opt, const char *curarg, grub_size_t len)
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{
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switch (opt)
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{
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case TYPE_NOAPM_OPTION:
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return check_option (curarg, "--no-apm", len);
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case TYPE_FORCE_OPTION:
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return check_option (curarg, "--force", len);
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case TYPE_TYPE_OR_NOMEM_OPTION:
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return check_option (curarg, "--type=netbsd", len)
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|| check_option (curarg, "--type=freebsd", len)
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|| check_option (curarg, "--type=openbsd", len)
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|| check_option (curarg, "--type=linux", len)
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|| check_option (curarg, "--type=biglinux", len)
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|| check_option (curarg, "--type=multiboot", len)
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|| check_option (curarg, "--no-mem-option", len);
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default:
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return 0;
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}
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}
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char *
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grub_legacy_parse (const char *buf, char **entryname)
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{
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const char *ptr;
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const char *cmdname;
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unsigned i, cmdnum;
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for (ptr = buf; *ptr && grub_isspace (*ptr); ptr++);
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if (!*ptr || *ptr == '#')
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return grub_strdup (buf);
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cmdname = ptr;
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for (ptr = buf; *ptr && !grub_isspace (*ptr) && *ptr != '='; ptr++);
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if (entryname && grub_strncmp ("title", cmdname, ptr - cmdname) == 0
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&& ptr - cmdname == sizeof ("title") - 1)
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{
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const char *ptr2;
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for (; grub_isspace (*ptr) || *ptr == '='; ptr++);
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ptr2 = ptr + grub_strlen (ptr);
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while (ptr2 > ptr && grub_isspace (*(ptr2 - 1)))
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ptr2--;
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*entryname = grub_strndup (ptr, ptr2 - ptr);
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return NULL;
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}
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if (grub_strncmp ("lock", cmdname, ptr - cmdname) == 0
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&& ptr - cmdname == sizeof ("lock") - 1)
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{
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/* FIXME */
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}
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for (cmdnum = 0; cmdnum < ARRAY_SIZE (legacy_commands); cmdnum++)
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if (grub_strncmp (legacy_commands[cmdnum].name, cmdname, ptr - cmdname) == 0
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&& legacy_commands[cmdnum].name[ptr - cmdname] == 0)
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break;
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if (cmdnum == ARRAY_SIZE (legacy_commands))
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return grub_xasprintf ("# Unsupported legacy command: %s\n", buf);
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for (; grub_isspace (*ptr) || *ptr == '='; ptr++);
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char *args[ARRAY_SIZE (legacy_commands[0].argt)];
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grub_memset (args, 0, sizeof (args));
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{
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unsigned j = 0;
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int hold_arg = 0;
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for (i = 0; i < legacy_commands[cmdnum].argc; i++)
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{
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const char *curarg;
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grub_size_t curarglen;
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if (hold_arg)
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{
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ptr = curarg;
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hold_arg = 0;
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}
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for (; grub_isspace (*ptr); ptr++);
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curarg = ptr;
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for (; *ptr && !grub_isspace (*ptr); ptr++);
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if (i != legacy_commands[cmdnum].argc - 1
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|| (legacy_commands[cmdnum].flags & FLAG_IGNORE_REST))
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curarglen = ptr - curarg;
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else
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{
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curarglen = grub_strlen (curarg);
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while (curarglen > 0 && grub_isspace (curarg[curarglen - 1]))
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curarglen--;
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}
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if (*ptr)
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ptr++;
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switch (legacy_commands[cmdnum].argt[i])
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{
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case TYPE_FILE_NO_CONSUME:
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hold_arg = 1;
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case TYPE_PARTITION:
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case TYPE_FILE:
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args[j++] = adjust_file (curarg, curarglen);
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break;
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case TYPE_REST_VERBATIM:
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{
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char *outptr, *outptr0;
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int overhead = 3;
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ptr = curarg;
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while (*ptr)
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{
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for (; *ptr && grub_isspace (*ptr); ptr++);
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for (; *ptr && !grub_isspace (*ptr); ptr++)
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if (*ptr == '\\' || *ptr == '\'')
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overhead++;
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if (*ptr)
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ptr++;
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overhead += 3;
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}
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outptr0 = args[j++] = grub_malloc (overhead + (ptr - curarg));
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if (!outptr0)
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return NULL;
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ptr = curarg;
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outptr = outptr0;
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while (*ptr)
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{
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|
for (; *ptr && grub_isspace (*ptr); ptr++);
|
|
if (outptr != outptr0)
|
|
*outptr++ = ' ';
|
|
*outptr++ = '\'';
|
|
for (; *ptr && !grub_isspace (*ptr); ptr++)
|
|
{
|
|
if (*ptr == '\\' || *ptr == '\'')
|
|
*outptr++ = '\\';
|
|
*outptr++ = *ptr;
|
|
}
|
|
*outptr++ = '\'';
|
|
if (*ptr)
|
|
ptr++;
|
|
}
|
|
*outptr++ = 0;
|
|
}
|
|
break;
|
|
|
|
case TYPE_VERBATIM:
|
|
args[j++] = grub_legacy_escape (curarg, curarglen);
|
|
break;
|
|
case TYPE_FORCE_OPTION:
|
|
case TYPE_NOAPM_OPTION:
|
|
case TYPE_TYPE_OR_NOMEM_OPTION:
|
|
if (is_option (legacy_commands[cmdnum].argt[i], curarg, curarglen))
|
|
{
|
|
args[j++] = grub_strndup (curarg, curarglen);
|
|
break;
|
|
}
|
|
args[j++] = "";
|
|
hold_arg = 1;
|
|
break;
|
|
case TYPE_INT:
|
|
{
|
|
const char *brk;
|
|
int base = 10;
|
|
brk = curarg;
|
|
if (curarglen < 1)
|
|
args[j++] = grub_strdup ("0");
|
|
if (brk[0] == '0' && brk[1] == 'x')
|
|
base = 16;
|
|
else if (brk[0] == '0')
|
|
base = 8;
|
|
for (; *brk && brk < curarg + curarglen; brk++)
|
|
{
|
|
if (base == 8 && (*brk == '8' || *brk == '9'))
|
|
break;
|
|
if (grub_isdigit (*brk))
|
|
continue;
|
|
if (base != 16)
|
|
break;
|
|
if (!(*brk >= 'a' && *brk <= 'f')
|
|
&& !(*brk >= 'A' && *brk <= 'F'))
|
|
break;
|
|
}
|
|
if (brk == curarg)
|
|
args[j++] = grub_strdup ("0");
|
|
else
|
|
args[j++] = grub_strndup (curarg, brk - curarg);
|
|
}
|
|
break;
|
|
case TYPE_BOOL:
|
|
if (curarglen == 2 && curarg[0] == 'o' && curarg[1] == 'n')
|
|
args[j++] = grub_strdup ("1");
|
|
else
|
|
args[j++] = grub_strdup ("0");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return grub_xasprintf (legacy_commands[cmdnum].map, args[0], args[1], args[2],
|
|
args[3]);
|
|
}
|