1 #!/usr/bin/ocamlrun /usr/bin/ocaml
7 #directory "+xml-light";;
8 #load "xml-light.cma";;
10 (* virt-p2v.ml is a script which performs a physical to
11 * virtual conversion of local disks.
13 * Copyright (C) 2007-2008 Red Hat Inc.
14 * Written by Richard W.M. Jones <rjones@redhat.com>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
36 type state = { greeting : bool;
37 remote_host : string option; remote_port : string option;
38 remote_directory : string option;
39 network : network option;
40 devices_to_send : string list option;
41 root_filesystem : partition option;
42 hypervisor : hypervisor option;
43 architecture : architecture option;
44 memory : int option; vcpus : int option;
45 mac_address : string option;
47 and network = Auto | Shell
48 and partition = Part of string * string (* eg. "hda", "1" *)
49 | LV of string * string (* eg. "VolGroup00", "LogVol00" *)
50 and hypervisor = Xen | QEMU | KVM
51 and architecture = I386 | X86_64 | IA64 | PPC | PPC64 | SPARC | SPARC64
52 | OtherArch of string | UnknownArch
54 (*----------------------------------------------------------------------*)
55 (* TO MAKE A CUSTOM virt-p2v SCRIPT, adjust the defaults in this section.
57 * If left as they are, then this will create a generic virt-p2v script
58 * which asks the user for each question. If you set the defaults here
59 * then you will get a custom virt-p2v which is partially or even fully
60 * automated and won't ask the user any questions.
62 * Note that 'None' means 'no default' (ie. ask the user) whereas
63 * 'Some foo' means use 'foo' as the answer.
66 (* If greeting is true, wait for keypress after boot and during
67 * final verification. Set to 'false' for less interactions.
71 (* Remote host and port. Set to 'Some "host"' and 'Some "port"',
77 (* Remote directory. Set to 'Some "path"' to set up a
78 * directory path, else ask the user.
80 remote_directory = None;
82 (* List of devices to send. Set to 'Some ["sda"; "sdb"]' for
83 * example to select /dev/sda and /dev/sdb.
85 devices_to_send = None;
87 (* The root filesystem containing /etc/fstab. Set to
88 * 'Some (Part ("sda", "3"))' or 'Some (LV ("VolGroup00", "LogVol00"))'
89 * for example, else ask user.
91 root_filesystem = None;
93 (* Network configuration: Set to 'Some Auto' (try to set it up
94 * automatically, or 'Some Shell' (give the user a shell).
98 (* Hypervisor: Set to 'Some Xen', 'Some QEMU' or 'Some KVM'. *)
101 (* Architecture: Set to 'Some X86_64' (or another architecture).
102 * If set to 'Some UnknownArch' then we try to autodetect the
103 * right architecture.
107 (* Memory: Set to 'Some nn' with nn in megabytes. If set to 'Some 0'
108 * then we use same amount of RAM as installed in the physical machine.
112 (* Virtual CPUs: Set to 'Some nn' where nn is the number of virtual CPUs.
113 * If set to 'Some 0' then we use the same as physical CPUs in the
118 (* MAC address: Set to 'Some "aa:bb:cc:dd:ee:ff"' where the string is
119 * the MAC address of the emulated network card. Set to 'Some ""' to
120 * choose a random MAC address.
124 (* END OF CUSTOM virt-p2v SCRIPT SECTION. *)
125 (*----------------------------------------------------------------------*)
127 (* General helper functions. *)
129 let sort_uniq ?(cmp = compare) xs = (* sort and uniq a list *)
130 let xs = List.sort ~cmp xs in
131 let rec loop = function
132 | [] -> [] | [x] -> [x]
133 | x1 :: x2 :: xs when x1 = x2 -> loop (x1 :: xs)
134 | x :: xs -> x :: loop xs
138 let input_all_lines chan =
139 let lines = ref [] in
141 while true do lines := input_line chan :: !lines done; []
143 End_of_file -> List.rev !lines
145 let dev_of_partition = function
146 | Part (dev, partnum) -> sprintf "/dev/%s%s" dev partnum
147 | LV (vg, lv) -> sprintf "/dev/%s/%s" vg lv
149 let string_of_architecture = function
156 | SPARC64 -> "sparc64"
157 | OtherArch arch -> arch
160 type dialog_status = Yes of string list | No | Help | Back | Error
162 type ask_result = Next of state | Prev | Ask_again
164 type nature = LinuxSwap
165 | LinuxRoot of architecture * linux_distro
166 | WindowsRoot (* Windows C: *)
167 | LinuxBoot (* Linux /boot *)
168 | NotRoot (* mountable, but not / or /boot *)
170 and linux_distro = RHEL of int * int
172 | Debian of int * int
175 let rec string_of_nature = function
176 | LinuxSwap -> "Linux swap"
177 | LinuxRoot (architecture, distro) ->
178 string_of_linux_distro distro ^ " " ^ string_of_architecture architecture
179 | WindowsRoot -> "Windows root"
180 | LinuxBoot -> "Linux /boot"
181 | NotRoot -> "Mountable non-root"
182 | UnknownNature -> "Unknown"
183 and string_of_linux_distro = function
184 | RHEL (a,b) -> sprintf "RHEL %d.%d" a b
185 | Fedora v -> sprintf "Fedora %d" v
186 | Debian (a,b) -> sprintf "Debian %d.%d" a b
187 | OtherLinux -> "Linux"
191 * Each function takes some common parameters (eg. ~title) and some
192 * dialog-specific parameters.
194 * Returns the exit status (Yes lines | No | Help | Back | Error).
196 let msgbox, yesno, inputbox, radiolist, checklist =
197 (* Internal function to actually run the "dialog" shell command. *)
198 let run_dialog cparams params =
199 let params = cparams @ params in
200 eprintf "dialog %s\n%!"
201 (String.concat " " (List.map (sprintf "%S") params));
203 (* 'dialog' writes its output/result to stderr, so we need to take
204 * special steps to capture that - in other words, manual pipe/fork.
206 let rfd, wfd = pipe () in
208 | 0 -> (* child, runs dialog *)
210 dup2 wfd stderr; (* capture stderr to pipe *)
211 execvp "dialog" (Array.of_list ("dialog" :: params))
212 | pid -> (* parent *)
214 let chan = in_channel_of_descr rfd in
215 let result = input_all_lines chan in
217 eprintf "dialog result: %S\n%!" (String.concat "\n" result);
218 match snd (wait ()) with
219 | WEXITED 0 -> Yes result (* something selected / entered *)
220 | WEXITED 1 -> No (* cancel / no button *)
221 | WEXITED 2 -> Help (* help pressed *)
222 | WEXITED 3 -> Back (* back button *)
223 | WEXITED _ -> Error (* error or Esc *)
224 | WSIGNALED i -> failwith (sprintf "dialog: killed by signal %d" i)
225 | WSTOPPED i -> failwith (sprintf "dialog: stopped by signal %d" i)
228 (* Handle the common parameters. Note Continuation Passing Style. *)
229 let with_common cont ?(cancel=false) ?(backbutton=true) title =
230 let params = ["--title"; title] in
231 let params = if not cancel then "--nocancel" :: params else params in
233 if backbutton then "--extra-button" :: "--extra-label" :: "Back" :: params
238 (* Message box and yes/no box. *)
241 fun cparams text height width ->
243 [ "--msgbox"; text; string_of_int height; string_of_int width ]
247 fun cparams text height width ->
249 [ "--yesno"; text; string_of_int height; string_of_int width ]
252 (* Simple input box. *)
255 fun cparams text height width default ->
257 [ "--inputbox"; text; string_of_int height; string_of_int width;
261 (* Radio list and check list. *)
264 fun cparams text height width listheight items ->
265 let items = List.map (
267 | tag, item, true -> [ tag; item; "on" ]
268 | tag, item, false -> [ tag; item; "off" ]
270 let items = List.concat items in
271 let items = "--single-quoted" ::
272 "--radiolist" :: text ::
273 string_of_int height :: string_of_int width ::
274 string_of_int listheight :: items in
275 run_dialog cparams items
279 fun cparams text height width listheight items ->
280 let items = List.map (
282 | tag, item, true -> [ tag; item; "on" ]
283 | tag, item, false -> [ tag; item; "off" ]
285 let items = List.concat items in
286 let items = "--separate-output" ::
287 "--checklist" :: text ::
288 string_of_int height :: string_of_int width ::
289 string_of_int listheight :: items in
290 run_dialog cparams items
293 msgbox, yesno, inputbox, radiolist, checklist
295 (* Print failure dialog and exit. *)
296 let fail_dialog text =
297 let text = "\n" ^ text ^ "\n\nIf you want to report this error, there is a shell on [ALT] [F2], log in as root with no password.\n\nPlease provide the contents of /tmp/virt-p2v.log and output of the 'dmesg' command." in
298 ignore (msgbox "Error" text 17 50);
301 (* Shell-safe quoting function. In fact there's one in stdlib so use it. *)
302 let quote = Filename.quote
304 (* Run a shell command and check it returns 0. *)
306 eprintf "sh: %s\n%!" cmd;
307 if Sys.command cmd <> 0 then fail_dialog (sprintf "Command failed:\n\n%s" cmd)
310 eprintf "shfailok: %s\n%!" cmd;
311 ignore (Sys.command cmd)
313 let shwithstatus cmd =
314 eprintf "shwithstatus: %s\n%!" cmd;
317 (* Same as `cmd` in shell. Any error message will be in the logfile. *)
319 eprintf "shget: %s\n%!" cmd;
320 let chan = open_process_in cmd in
321 let lines = input_all_lines chan in
322 match close_process_in chan with
323 | WEXITED 0 -> Some lines (* command succeeded *)
324 | WEXITED _ -> None (* command failed *)
325 | WSIGNALED i -> failwith (sprintf "shget: command killed by signal %d" i)
326 | WSTOPPED i -> failwith (sprintf "shget: command stopped by signal %d" i)
328 (* Start an interactive shell. *)
330 shfailok "PS1='\\u@\\h:\\w\\$ ' bash"
332 (* Some true if is dir/file, Some false if not, None if not found. *)
334 try Some ((stat path).st_kind = S_DIR)
335 with Unix_error (ENOENT, "stat", _) -> None
337 try Some ((stat path).st_kind = S_REG)
338 with Unix_error (ENOENT, "stat", _) -> None
340 (* Useful regular expression. *)
341 let whitespace = Pcre.regexp "[ \t]+"
343 (* Generate a predictable safe name containing only letters, numbers
344 * and underscores. If passed a string with no letters or numbers,
345 * generates "_1", "_2", etc.
350 fun () -> incr i; "_" ^ string_of_int !i
353 let is_safe = function 'a'..'z'|'A'..'Z'|'0'..'9' -> true | _ -> false in
354 let name = String.copy name in
355 let have_safe = ref false in
356 for i = 0 to String.length name - 1 do
357 if not (is_safe name.[i]) then name.[i] <- '_' else have_safe := true
359 if !have_safe then name else next_anon ()
361 type block_device = string * int64 (* "hda" & size in bytes *)
363 (* Parse the output of 'lvs' to get list of LV names, sizes,
364 * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize).
367 let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in
371 shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size"
375 let lines = List.map (Pcre.split ~rex:whitespace) lines in
378 | [vg; lv; pvs; lvsize]
379 | [_; vg; lv; pvs; lvsize] ->
380 let pvs = String.nsplit pvs "," in
381 let pvs = List.filter_map (
384 let subs = Pcre.exec ~rex:devname pv in
385 Some (Pcre.get_substring subs 1)
388 eprintf "lvs: unexpected device name: %s\n%!" pv;
391 LV (vg, lv), pvs, lvsize
393 failwith ("lvs: unexpected output: " ^ String.concat "," line)
396 (* Get the partitions on a block device.
397 * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")]
399 let get_partitions dev =
400 let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in
401 let devdir = "/sys/block/" ^ dev in
402 let parts = Sys.readdir devdir in
403 let parts = Array.to_list parts in
404 let parts = List.filter (
405 fun name -> Some true = is_dir (devdir ^ "/" ^ name)
407 let parts = List.filter_map (
410 let subs = Pcre.exec ~rex part in
411 Some (Part (dev, Pcre.get_substring subs 1))
417 (* Generate snapshot device name from device name. *)
418 let snapshot_name dev =
419 "snap" ^ (safe_name dev)
421 (* Perform a device-mapper snapshot with ramdisk overlay. *)
423 let next_free_ram_disk =
425 fun () -> incr i; "/dev/ram" ^ string_of_int !i
427 fun origin_dev snapshot_dev ->
428 let ramdisk = next_free_ram_disk () in
430 let cmd = "blockdev --getsz " ^ quote ("/dev/" ^ origin_dev) in
431 let lines = shget cmd in
433 | Some (sectors::_) -> Int64.of_string sectors
435 fail_dialog (sprintf "Snapshot failed - unable to read the size in sectors of block device %s" origin_dev) in
437 (* Create the snapshot origin device. Called, eg. snap_sda1_org *)
438 sh (sprintf "dmsetup create %s_org --table='0 %Ld snapshot-origin /dev/%s'"
439 snapshot_dev sectors origin_dev);
440 (* Create the snapshot. *)
441 sh (sprintf "dmsetup create %s --table='0 %Ld snapshot /dev/mapper/%s_org %s n 64'"
442 snapshot_dev sectors snapshot_dev ramdisk)
444 (* Try to perform automatic network configuration, assuming a Fedora or RHEL-
445 * like root filesystem mounted on /mnt/root.
447 let auto_network state =
448 (* Fedora gives an error if this file doesn't exist. *)
449 sh "touch /etc/resolv.conf";
451 chdir "/etc/sysconfig";
453 sh "mv network network.saved";
454 sh "mv networking networking.saved";
455 sh "mv network-scripts network-scripts.saved";
457 (* Originally I symlinked these, but that causes dhclient to
458 * keep open /mnt/root (as its cwd is in network-scripts subdir).
459 * So now we will copy them recursively instead.
461 sh "cp -r /mnt/root/etc/sysconfig/network .";
462 sh "cp -r /mnt/root/etc/sysconfig/networking .";
463 sh "cp -r /mnt/root/etc/sysconfig/network-scripts .";
465 let status = shwithstatus "/etc/init.d/network start" in
467 sh "rm -rf network networking network-scripts";
468 sh "mv network.saved network";
469 sh "mv networking.saved networking";
470 sh "mv network-scripts.saved network-scripts";
474 (* Try to ping the remote host to see if this worked. *)
475 shfailok ("ping -c 3 " ^ Option.map_default quote "" state.remote_host);
477 if state.greeting then (
478 printf "\n\nDid automatic network configuration work?\n";
479 printf "Hint: If not sure, there is a shell on console [ALT] [F2]\n";
481 let line = read_line () in
482 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
485 (* Non-interactive: return the status of /etc/init.d/network start. *)
488 (* Map local device names to remote devices names. At the moment we
489 * just change sd* to hd* (as device names appear under fullvirt). In
490 * future, lots of complex possibilities.
492 let remote_of_origin_dev =
493 let devsd = Pcre.regexp "^sd([[:alpha:]]+[[:digit:]]*)$" in
494 let devsd_subst = Pcre.subst "hd$1" in
496 Pcre.replace ~rex:devsd ~itempl:devsd_subst dev
498 (* Rewrite /mnt/root/etc/fstab. *)
499 let rewrite_fstab state devices_to_send =
500 let filename = "/mnt/root/etc/fstab" in
501 if is_file filename = Some true then (
502 sh ("cp " ^ quote filename ^ " " ^ quote (filename ^ ".p2vsaved"));
504 let chan = open_in filename in
505 let lines = input_all_lines chan in
507 let lines = List.map (Pcre.split ~rex:whitespace) lines in
508 let lines = List.map (
510 | dev :: rest when String.starts_with dev "/dev/" ->
511 let dev = String.sub dev 5 (String.length dev - 5) in
512 let dev = remote_of_origin_dev dev in
513 let dev = "/dev/" ^ dev in
518 let chan = open_out filename in
521 | [dev; mountpoint; fstype; options; freq; passno] ->
522 fprintf chan "%-23s %-23s %-7s %-15s %s %s\n"
523 dev mountpoint fstype options freq passno
525 output_string chan (String.concat " " line)
530 (* Main entry point. *)
531 let rec main ttyname =
532 (* Running from an init script. We don't have much of a
533 * login environment, so set one up.
537 ["/usr/sbin"; "/sbin"; "/usr/local/bin"; "/usr/kerberos/bin";
538 "/usr/bin"; "/bin"]);
539 putenv "HOME" "/root";
540 putenv "LOGNAME" "root";
542 (* We can safely write in /tmp (it's a synthetic live CD directory). *)
545 (* Set up logging to /tmp/virt-p2v.log. *)
546 let fd = openfile "virt-p2v.log" [ O_WRONLY; O_APPEND; O_CREAT ] 0o644 in
550 (* Log the start up time. *)
551 eprintf "\n\n**************************************************\n\n";
552 let tm = localtime (time ()) in
553 eprintf "virt-p2v-ng starting up at %04d-%02d-%02d %02d:%02d:%02d\n\n%!"
554 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min tm.tm_sec;
556 (* Connect stdin/stdout to the tty. *)
560 let fd = openfile ("/dev/" ^ ttyname) [ O_RDWR ] 0 in
564 printf "virt-p2v.ml starting up ...\n%!";
566 (* Check that the environment is a sane-looking live CD. If not, bail. *)
567 if is_dir "/mnt/root" <> Some true then
569 "You should only run this script from the live CD or a USB key.";
571 printf "virt-p2v.ml detecting hard drives (this may take some time) ...\n%!";
573 (* Search for all non-removable block devices. Do this early and bail
574 * if we can't find anything. This is a list of strings, like "hda".
576 let all_block_devices : block_device list =
577 let rex = Pcre.regexp "^[hs]d" in
578 let devices = Array.to_list (Sys.readdir "/sys/block") in
579 let devices = List.sort devices in
580 let devices = List.filter (fun d -> Pcre.pmatch ~rex d) devices in
581 eprintf "all_block_devices: block devices: %s\n%!"
582 (String.concat "; " devices);
583 (* Run blockdev --getsize64 on each, and reject any where this fails
584 * (probably removable devices).
586 let devices = List.filter_map (
588 let cmd = "blockdev --getsize64 " ^ quote ("/dev/" ^ d) in
589 let lines = shget cmd in
591 | Some (blksize::_) -> Some (d, Int64.of_string blksize)
592 | Some [] | None -> None
594 eprintf "all_block_devices: non-removable block devices: %s\n%!"
596 (List.map (fun (d, b) -> sprintf "%s [%Ld]" d b) devices));
598 fail_dialog "No non-removable block devices (hard disks, etc.) could be found on this machine.";
601 (* Search for partitions and LVs (anything that could contain a
602 * filesystem directly). We refer to these generically as
605 let all_partitions : partition list =
608 let lvs = get_lvs () in
609 let pvs = List.map (fun (_, pvs, _) -> pvs) lvs in
610 let pvs = List.concat pvs in
611 let pvs = sort_uniq pvs in
612 eprintf "all_partitions: PVs: %s\n%!" (String.concat "; " pvs);
613 let lvs = List.map (fun (lvname, _, _) -> lvname) lvs in
614 eprintf "all_partitions: LVs: %s\n%!"
615 (String.concat "; " (List.map dev_of_partition lvs));
618 (* Partitions (eg. "sda1", "sda2"). *)
620 let parts = List.map fst all_block_devices in
621 let parts = List.map get_partitions parts in
622 let parts = List.concat parts in
623 eprintf "all_partitions: all partitions: %s\n%!"
624 (String.concat "; " (List.map dev_of_partition parts));
626 (* Remove any partitions which are PVs. *)
627 let parts = List.filter (
629 | Part (dev, partnum) -> not (List.mem (dev ^ partnum) pvs)
630 | LV _ -> assert false
633 eprintf "all_partitions: partitions after removing PVs: %s\n%!"
634 (String.concat "; " (List.map dev_of_partition parts));
636 (* Concatenate LVs & Parts *)
639 (* Try to determine the nature of each partition.
640 * Root? Swap? Architecture? etc.
642 let all_partitions : (partition * nature) list =
643 (* Output of 'file' command for Linux swap file. *)
644 let swap = Pcre.regexp "Linux.*swap.*file" in
645 (* Contents of /etc/redhat-release. *)
646 let rhel = Pcre.regexp "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)\\.(\\d+)" in
647 let fedora = Pcre.regexp "Fedora.*release (\\d+)\\.(\\d+)" in
648 (* Contents of /etc/debian_version. *)
649 let debian = Pcre.regexp "^(\\d+)\\.(\\d+)" in
650 (* Output of 'file' on certain executables. *)
651 let i386 = Pcre.regexp ", Intel 80386," in
652 let x86_64 = Pcre.regexp ", x86-64," in
653 let itanic = Pcre.regexp ", IA-64," in
655 (* Examine the filesystem mounted on 'mnt' to determine the
656 * operating system, and, if Linux, the distro.
659 if is_dir (mnt ^ "/Windows") = Some true &&
660 is_file (mnt ^ "/autoexec.bat") = Some true then
662 else if is_dir (mnt ^ "/etc") = Some true &&
663 is_dir (mnt ^ "/sbin") = Some true &&
664 is_dir (mnt ^ "/var") = Some true then (
665 if is_file (mnt ^ "/etc/redhat-release") = Some true then (
666 let chan = open_in (mnt ^ "/etc/redhat-release") in
667 let lines = input_all_lines chan in
671 | [] -> (* empty /etc/redhat-release ...? *)
672 LinuxRoot (UnknownArch, OtherLinux)
675 let subs = Pcre.exec ~rex:rhel line in
676 let major = int_of_string (Pcre.get_substring subs 1) in
677 let minor = int_of_string (Pcre.get_substring subs 2) in
678 LinuxRoot (UnknownArch, RHEL (major, minor))
680 Not_found | Failure "int_of_string" ->
682 let subs = Pcre.exec ~rex:fedora line in
683 let version = int_of_string (Pcre.get_substring subs 1) in
684 LinuxRoot (UnknownArch, Fedora version)
686 Not_found | Failure "int_of_string" ->
687 LinuxRoot (UnknownArch, OtherLinux)
689 else if is_file (mnt ^ "/etc/debian_version") = Some true then (
690 let chan = open_in (mnt ^ "/etc/debian_version") in
691 let lines = input_all_lines chan in
695 | [] -> (* empty /etc/debian_version ...? *)
696 LinuxRoot (UnknownArch, OtherLinux)
699 let subs = Pcre.exec ~rex:debian line in
700 let major = int_of_string (Pcre.get_substring subs 1) in
701 let minor = int_of_string (Pcre.get_substring subs 2) in
702 LinuxRoot (UnknownArch, Debian (major, minor))
704 Not_found | Failure "int_of_string" ->
705 LinuxRoot (UnknownArch, OtherLinux)
708 LinuxRoot (UnknownArch, OtherLinux)
709 ) else if is_dir (mnt ^ "/grub") = Some true &&
710 is_file (mnt ^ "/grub/stage1") = Some true then (
713 NotRoot (* mountable, but not a root filesystem *)
716 (* Examine the Linux root filesystem mounted on 'mnt' to
717 * determine the architecture. We do this by looking at some
718 * well-known binaries that we expect to be there.
720 let detect_architecture mnt =
721 let cmd = "file -bL " ^ quote (mnt ^ "/sbin/init") in
723 | Some (str::_) when Pcre.pmatch ~rex:i386 str -> I386
724 | Some (str::_) when Pcre.pmatch ~rex:x86_64 str -> X86_64
725 | Some (str::_) when Pcre.pmatch ~rex:itanic str -> IA64
731 let dev = dev_of_partition part in (* Get /dev device. *)
734 (* Use 'file' command to detect if it is swap. *)
735 let cmd = "file -sbL " ^ quote dev in
737 | Some (str::_) when Pcre.pmatch ~rex:swap str -> LinuxSwap
739 (* Blindly try to mount the device. *)
740 let cmd = "mount -o ro " ^ quote dev ^ " /mnt/root" in
741 match shwithstatus cmd with
743 let os = detect_os "/mnt/root" in
746 | LinuxRoot (UnknownArch, distro) ->
747 let architecture = detect_architecture "/mnt/root" in
748 LinuxRoot (architecture, distro)
750 sh "umount /mnt/root";
753 | _ -> UnknownNature (* not mountable *)
757 eprintf "partition detection: %s is %s\n%!"
758 dev (string_of_nature nature);
764 printf "virt-p2v.ml finished detecting hard drives\n%!";
767 let ask_greeting state =
768 ignore (msgbox "virt-p2v" "\nWelcome to virt-p2v, a live CD for migrating a physical machine to a virtualized host.\n\nTo continue press the Return key.\n\nTo get a shell you can use [ALT] [F2] and log in as root with no password.\n\nExtra information is logged in /tmp/virt-p2v.log but this file disappears when the machine reboots." 18 50);
772 let ask_hostname state =
774 inputbox "Remote host" "Remote host" 10 50
775 (Option.default "" state.remote_host)
777 | Yes [] -> Ask_again
778 | Yes (hostname::_) -> Next { state with remote_host = Some hostname }
779 | No | Help | Error -> Ask_again
785 inputbox "Remote port" "Remote port" 10 50
786 (Option.default "22" state.remote_port)
788 | Yes ([]|""::_) -> Next { state with remote_port = Some "22" }
789 | Yes (port::_) -> Next { state with remote_port = Some port }
790 | No | Help | Error -> Ask_again
794 let ask_directory state =
795 let default_dir = "/var/lib/xen/images" in
797 inputbox "Remote directory" "Remote directory" 10 50
798 (Option.default default_dir state.remote_directory)
800 | Yes ([]|""::_) -> Next { state with remote_directory = Some default_dir }
801 | Yes (dir::_) -> Next { state with remote_directory = Some dir }
802 | No | Help | Error -> Ask_again
806 let ask_network state =
808 radiolist "Network configuration" "Network configuration" 10 50 2 [
809 "auto", "Automatic configuration", state.network = Some Auto;
810 "sh", "Configure from the shell", state.network = Some Shell;
813 | Yes ("auto"::_) -> Next { state with network = Some Auto }
814 | Yes ("sh"::_) -> Next { state with network = Some Shell }
815 | Yes _ | No | Help | Error -> Ask_again
819 let ask_devices state =
820 let selected_devices = Option.default [] state.devices_to_send in
821 let devices = List.map (
822 fun (dev, blksize) ->
824 sprintf "/dev/%s (%.3f GB)" dev
825 ((Int64.to_float blksize) /. (1024.*.1024.*.1024.)),
826 List.mem dev selected_devices)
827 ) all_block_devices in
829 checklist "Devices" "Pick devices to send" 15 50 8 devices
831 | Yes [] | No | Help | Error -> Ask_again
832 | Yes devices -> Next { state with devices_to_send = Some devices }
837 let parts = List.mapi (
838 fun i (part, nature) ->
841 | LinuxSwap -> " (Linux swap)"
842 | LinuxRoot (_, RHEL (a,b)) -> sprintf " (RHEL %d.%d root)" a b
843 | LinuxRoot (_, Fedora v) -> sprintf " (Fedora %d root)" v
844 | LinuxRoot (_, Debian (a,b)) -> sprintf " (Debian %d.%d root)" a b
845 | LinuxRoot (_, OtherLinux) -> sprintf " (Linux root)"
846 | WindowsRoot -> " (Windows C:)"
847 | LinuxBoot -> " (Linux /boot)"
848 | NotRoot -> " (filesystem)"
849 | UnknownNature -> "" in
851 dev_of_partition part ^ descr,
852 Some part = state.root_filesystem)
855 radiolist "Root device"
856 "Pick partition containing the root (/) filesystem" 18 70 9
860 let (part, _) = List.nth all_partitions (int_of_string i) in
861 Next { state with root_filesystem = Some part }
862 | Yes [] | No | Help | Error -> Ask_again
866 let ask_hypervisor state =
868 radiolist "Hypervisor"
869 "Choose hypervisor / virtualization system"
871 "xen", "Xen", state.hypervisor = Some Xen;
872 "qemu", "QEMU", state.hypervisor = Some QEMU;
873 "kvm", "KVM", state.hypervisor = Some KVM;
874 "other", "Other", state.hypervisor = None
877 | Yes ("xen"::_) -> Next { state with hypervisor = Some Xen }
878 | Yes ("qemu"::_) -> Next { state with hypervisor = Some QEMU }
879 | Yes ("kvm"::_) -> Next { state with hypervisor = Some KVM }
880 | Yes _ -> Next { state with hypervisor = None }
881 | No | Help | Error -> Ask_again
885 let ask_architecture state =
887 radiolist "Architecture" "Machine architecture" 16 50 8 [
888 "i386", "i386 and up (32 bit)", state.architecture = Some I386;
889 "x86_64", "x86-64 (64 bit)", state.architecture = Some X86_64;
890 "ia64", "Itanium IA64", state.architecture = Some IA64;
891 "ppc", "PowerPC (32 bit)", state.architecture = Some PPC;
892 "ppc64", "PowerPC (64 bit)", state.architecture = Some PPC64;
893 "sparc", "SPARC (32 bit)", state.architecture = Some SPARC;
894 "sparc64", "SPARC (64 bit)", state.architecture = Some SPARC64;
895 "auto", "Auto-detect",
896 state.architecture = None || state.architecture = Some UnknownArch;
899 | Yes ("i386" :: _) -> Next { state with architecture = Some I386 }
900 | Yes ("x86_64" :: _) -> Next { state with architecture = Some X86_64 }
901 | Yes ("ia64" :: _) -> Next { state with architecture = Some IA64 }
902 | Yes ("ppc" :: _) -> Next { state with architecture = Some PPC }
903 | Yes ("ppc64" :: _) -> Next { state with architecture = Some PPC64 }
904 | Yes ("sparc" :: _) -> Next { state with architecture = Some SPARC }
905 | Yes ("sparc64" :: _) -> Next { state with architecture = Some SPARC64 }
906 | Yes _ -> Next { state with architecture = Some UnknownArch }
907 | No | Help | Error -> Ask_again
911 let ask_memory state =
913 inputbox "Memory" "Memory (MB). Leave blank to use same as physical server."
915 (Option.map_default string_of_int "" state.memory)
917 | Yes (""::_ | []) -> Next { state with memory = Some 0 }
919 let mem = try int_of_string mem with Failure "int_of_string" -> -1 in
920 if mem < 0 || (mem > 0 && mem < 64) then Ask_again
921 else Next { state with memory = Some mem }
922 | No | Help | Error -> Ask_again
926 let ask_vcpus state =
928 inputbox "VCPUs" "Virtual CPUs. Leave blank to use same as physical server."
930 (Option.map_default string_of_int "" state.vcpus)
932 | Yes (""::_ | []) -> Next { state with vcpus = Some 0 }
935 try int_of_string vcpus with Failure "int_of_string" -> -1 in
936 if vcpus < 0 then Ask_again
937 else Next { state with vcpus = Some vcpus }
938 | No | Help | Error -> Ask_again
942 let ask_mac_address state =
944 inputbox "MAC address"
945 "Network MAC address. Leave blank to use a random address." 10 50
946 (Option.default "" state.mac_address)
948 | Yes (""::_ | []) -> Next { state with mac_address = Some "" }
949 | Yes (mac :: _) -> Next { state with mac_address = Some mac }
950 | No | Help | Error -> Ask_again
954 let ask_verify state =
956 yesno "Verify and proceed"
957 (sprintf "\nPlease verify the settings below and click [OK] to proceed, or the [Back] button to return to a previous step.
969 (Option.default "" state.remote_host)
970 (Option.default "" state.remote_port)
971 (Option.default "" state.remote_directory)
972 (match state.network with
973 | Some Auto -> "Auto-configure" | Some Shell -> "Shell"
975 (String.concat "," (Option.default [] state.devices_to_send))
976 (Option.map_default dev_of_partition "" state.root_filesystem)
977 (match state.hypervisor with
978 | Some Xen -> "Xen" | Some QEMU -> "QEMU" | Some KVM -> "KVM"
979 | None -> "Other / not set")
980 (match state.architecture with
981 | Some UnknownArch -> "Auto-detect"
982 | Some arch -> string_of_architecture arch | None -> "")
983 (match state.memory with
984 | Some 0 -> "Same as physical"
985 | Some mem -> string_of_int mem ^ " MB" | None -> "")
986 (match state.vcpus with
987 | Some 0 -> "Same as physical"
988 | Some vcpus -> string_of_int vcpus | None -> "")
989 (match state.mac_address with
990 | Some "" -> "Random" | Some mac -> mac | None -> "")
994 | Yes _ -> Next state
996 | No | Help | Error -> Ask_again
999 (* This is the list of dialogs, in order. The user can go forwards or
1000 * backwards through them. The second parameter in each pair is
1001 * false if we need to skip this dialog (info already supplied in
1002 * 'defaults' above).
1005 ask_greeting, (* Initial greeting. *)
1007 ask_hostname, (* Hostname. *)
1008 defaults.remote_host = None;
1009 ask_port, (* Port number. *)
1010 defaults.remote_port = None;
1011 ask_directory, (* Remote directory. *)
1012 defaults.remote_directory = None;
1013 ask_network, (* Network configuration. *)
1014 defaults.network = None;
1015 ask_devices, (* Block devices to send. *)
1016 defaults.devices_to_send = None;
1017 ask_root, (* Root filesystem. *)
1018 defaults.root_filesystem = None;
1019 ask_hypervisor, (* Hypervisor. *)
1020 defaults.hypervisor = None;
1021 ask_architecture, (* Architecture. *)
1022 defaults.architecture = None;
1023 ask_memory, (* Memory. *)
1024 defaults.memory = None;
1025 ask_vcpus, (* VCPUs. *)
1026 defaults.vcpus = None;
1027 ask_mac_address, (* MAC address. *)
1028 defaults.mac_address = None;
1029 ask_verify, (* Verify settings. *)
1033 (* Loop through the dialogs until we reach the end. *)
1034 let rec loop posn state =
1035 eprintf "dialog loop: posn = %d\n%!" posn;
1036 if posn >= Array.length dlgs then state (* Finished all dialogs. *)
1038 let dlg, no_skip = dlgs.(posn) in
1039 let skip = not no_skip in
1041 (* Skip this dialog and move straight to the next one. *)
1045 match dlg state with
1046 | Next new_state -> loop (posn+1) new_state (* Forwards. *)
1047 | Prev -> loop (posn-1) state (* Backwards / back button. *)
1048 | Ask_again -> loop posn state (* Repeat the question. *)
1052 let state = loop 0 defaults in
1054 eprintf "finished dialog loop\n%!";
1056 (* Switch LVM config. *)
1058 putenv "LVM_SYSTEM_DIR" "/etc/lvm.new"; (* see lvm(8) *)
1059 sh "rm -f /etc/lvm/cache/.cache";
1060 sh "rm -f /etc/lvm.new/cache/.cache";
1062 (* Snapshot the block devices to send. *)
1063 let devices_to_send = Option.get state.devices_to_send in
1064 let devices_to_send =
1067 let snapshot_dev = snapshot_name origin_dev in
1068 snapshot origin_dev snapshot_dev;
1069 (origin_dev, snapshot_dev)
1070 ) devices_to_send in
1072 (* Run kpartx on the snapshots. *)
1074 fun (origin, snapshot) ->
1075 shfailok ("kpartx -a " ^ quote ("/dev/mapper/" ^ snapshot))
1078 (* Rescan for LVs. *)
1082 (* Mount the root filesystem under /mnt/root. *)
1083 let root_filesystem = Option.get state.root_filesystem in
1084 (match root_filesystem with
1085 | Part (dev, partnum) ->
1086 let dev = dev ^ partnum in
1087 let snapshot_dev = snapshot_name dev in
1088 sh ("mount " ^ quote ("/dev/mapper/" ^ snapshot_dev) ^ " /mnt/root")
1091 (* The LV will be backed by a snapshot device, so just mount
1094 sh ("mount " ^ quote ("/dev/" ^ vg ^ "/" ^ lv) ^ " /mnt/root")
1097 (* See if we can do network configuration. *)
1098 let network = Option.get state.network in
1101 printf "Network configuration.\n\n";
1102 printf "Please configure the network from this shell.\n\n";
1103 printf "When you have finished, exit the shell with ^D or exit.\n\n%!";
1108 "Trying network auto-configuration from root filesystem ...\n\n%!";
1109 if not (auto_network state) then (
1110 printf "\nAuto-configuration failed. Starting a shell.\n\n";
1111 printf "Please configure the network from this shell.\n\n";
1112 printf "When you have finished, exit the shell with ^D or exit.\n\n";
1117 (* Work out what devices will be called at the remote end. *)
1118 let devices_to_send = List.map (
1119 fun (origin_dev, snapshot_dev) ->
1120 let remote_dev = remote_of_origin_dev origin_dev in
1121 (origin_dev, snapshot_dev, remote_dev)
1122 ) devices_to_send in
1124 (* Modify files on the root filesystem. *)
1125 rewrite_fstab state devices_to_send;
1126 (* XXX Other files to rewrite? *)
1128 (* XXX Autodetect architecture of root filesystem by looking for /bin/ls. *)
1129 let system_architecture = X86_64 in
1131 (* XXX Autodetect system memory. *)
1132 let system_memory = 256 in
1134 (* XXX Autodetect system # pCPUs. *)
1135 let system_nr_cpus = 1 in
1137 (* Unmount the root filesystem and sync disks. *)
1138 sh "umount /mnt/root";
1139 sh "sync"; (* Ugh, should be in stdlib. *)
1141 (* Disable screen blanking on console. *)
1142 sh "setterm -blank 0";
1144 let remote_host = Option.get state.remote_host in
1145 let remote_port = Option.get state.remote_port in
1146 let remote_directory = Option.get state.remote_directory in
1148 (* Functions to connect and disconnect from the remote system. *)
1149 let do_connect remote_name _ =
1150 let cmd = sprintf "ssh -C -p %s %s \"cat > %s/%s\""
1151 (quote remote_port) (quote remote_host)
1152 (quote remote_directory) (quote remote_name) in
1153 eprintf "connect: %s\n%!" cmd;
1154 let chan = open_process_out cmd in
1155 descr_of_out_channel chan, chan
1157 let do_disconnect (_, chan) =
1158 match close_process_out chan with
1159 | WEXITED 0 -> () (* OK *)
1160 | WEXITED i -> failwith (sprintf "ssh: exited with error code %d" i)
1161 | WSIGNALED i -> failwith (sprintf "ssh: killed by signal %d" i)
1162 | WSTOPPED i -> failwith (sprintf "ssh: stopped by signal %d" i)
1165 (* XXX This is using the hostname derived from network configuration
1166 * above. We might want to ask the user to choose.
1168 let hostname = safe_name (gethostname ()) in
1170 let date = sprintf "%04d%02d%02d%02d%02d"
1171 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min in
1172 "p2v-" ^ hostname ^ "-" ^ date in
1174 (* Work out what the image filenames will be at the remote end. *)
1175 let devices_to_send = List.map (
1176 fun (origin_dev, snapshot_dev, remote_dev) ->
1177 let remote_name = basename ^ "-" ^ remote_dev ^ ".img" in
1178 (origin_dev, snapshot_dev, remote_dev, remote_name)
1179 ) devices_to_send in
1181 (* Write a configuration file. Not sure if this is any better than
1182 * just 'sprintf-ing' bits of XML text together, but at least we will
1183 * always get well-formed XML.
1185 * XXX For some of the stuff here we really should do a
1186 * virConnectGetCapabilities call to the remote host first.
1188 * XXX There is a case for using virt-install to generate this XML.
1189 * When we start to incorporate libvirt access & storage API this
1190 * needs to be rethought.
1192 let conf_filename = basename ^ ".conf" in
1195 match state.architecture with
1196 | Some UnknownArch | None -> system_architecture
1197 | Some arch -> arch in
1199 match state.memory with
1200 | Some 0 | None -> system_memory
1201 | Some memory -> memory in
1203 match state.vcpus with
1204 | Some 0 | None -> system_nr_cpus
1207 match state.mac_address with
1210 List.map (sprintf "%02x") (
1211 List.map (fun _ -> Random.int 256) [0;0;0]
1213 String.concat ":" ("00"::"16"::"3e"::random)
1214 | Some mac -> mac in
1217 (* Shortcut to make "<name>value</name>". *)
1218 let leaf name value = Xml.Element (name, [], [Xml.PCData value]) in
1219 (* ... and the _other_ sort of leaf (god I hate XML). *)
1220 let tleaf name attribs = Xml.Element (name, attribs, []) in
1222 (* Standard stuff for every domain. *)
1223 let name = leaf "name" hostname in
1224 let memory = leaf "memory" (string_of_int (memory * 1024)) in
1225 let vcpu = leaf "vcpu" (string_of_int vcpus) in
1227 (* Top-level stuff which differs for each HV type (isn't this supposed
1228 * to be portable ...)
1231 match state.hypervisor with
1233 [Xml.Element ("os", [],
1235 leaf "loader" "/usr/lib/xen/boot/hvmloader";
1236 tleaf "boot" ["dev", "hd"]]);
1237 Xml.Element ("features", [],
1241 tleaf "clock" ["sync", "localtime"]]
1243 [Xml.Element ("os", [], [leaf "type" "hvm"]);
1244 tleaf "clock" ["sync", "localtime"]]
1246 [Xml.Element ("os", [],
1247 [Xml.Element ("type",
1249 string_of_architecture architecture;
1251 [Xml.PCData "hvm"]);
1252 tleaf "boot" ["dev", "hd"]])]
1256 (* <devices> section. *)
1259 match state.hypervisor with
1261 [leaf "emulator" "/usr/lib64/xen/bin/qemu-dm"] (* XXX lib64? *)
1263 [leaf "emulator" "/usr/bin/qemu"]
1265 [leaf "emulator" "/usr/bin/qemu-kvm"]
1269 Xml.Element ("interface", ["type", "user"],
1270 [tleaf "mac" ["address", mac_address]]) in
1271 (* XXX should have an option for Xen bridging:
1273 "interface", ["type","bridge"],
1274 [tleaf "source" ["bridge","xenbr0"];
1275 tleaf "mac" ["address",mac_address];
1276 tleaf "script" ["path","vif-bridge"]])*)
1277 let graphics = tleaf "graphics" ["type", "vnc"] in
1279 let disks = List.map (
1280 fun (_, _, remote_dev, remote_name) ->
1282 "disk", ["type", "file";
1284 [tleaf "source" ["file", remote_directory ^ "/" ^ remote_name];
1285 tleaf "target" ["dev", remote_dev]]
1287 ) devices_to_send in
1291 emulator @ interface :: graphics :: disks
1294 (* Put it all together in <domain type='foo'>. *)
1297 (match state.hypervisor with
1298 | Some Xen -> ["type", "xen"]
1299 | Some QEMU -> ["type", "qemu"]
1300 | Some KVM -> ["type", "kvm"]
1302 name :: memory :: vcpu :: extras @ [devices]
1305 let xml = Xml.to_string_fmt xml in
1306 let xml_len = String.length xml in
1307 eprintf "length of configuration file is %d bytes\n%!" xml_len;
1309 let (sock,_) as conn = do_connect conf_filename (Int64.of_int xml_len) in
1310 (* In OCaml this actually loops calling write(2) *)
1311 ignore (write sock xml 0 xml_len);
1314 (* Send the device snapshots to the remote host. *)
1315 (* XXX This code should be made more robust against both network
1316 * errors and local I/O errors. Also should allow the user several
1317 * attempts to connect, or let them go back to the dialog stage.
1320 fun (origin_dev, snapshot_dev, remote_dev, remote_name) ->
1321 eprintf "sending %s as %s\n%!" origin_dev remote_name;
1324 try List.assoc origin_dev all_block_devices
1325 with Not_found -> assert false (* internal error *) in
1327 printf "Sending /dev/%s (%.3f GB) to remote machine\n%!" origin_dev
1328 ((Int64.to_float size) /. (1024.*.1024.*.1024.));
1330 (* Open the snapshot device. *)
1331 let fd = openfile ("/dev/mapper/" ^ snapshot_dev) [O_RDONLY] 0 in
1334 let (sock,_) as conn = do_connect remote_name size in
1336 (* Copy the data. *)
1337 let bufsize = 1024 * 1024 in
1338 let buffer = String.create bufsize in
1339 let start = gettimeofday () in
1341 let rec copy bytes_sent last_printed_at =
1342 let n = read fd buffer 0 bufsize in
1344 ignore (write sock buffer 0 n);
1346 let bytes_sent = Int64.add bytes_sent (Int64.of_int n) in
1347 let last_printed_at =
1348 let now = gettimeofday () in
1349 (* Print progress once per second. *)
1350 if now -. last_printed_at > 1. then (
1351 let elapsed = Int64.to_float bytes_sent /. Int64.to_float size in
1352 let secs_elapsed = now -. start in
1353 printf "%.0f%%" (100. *. elapsed);
1354 (* After 60 seconds has elapsed, start printing estimates. *)
1355 if secs_elapsed >= 60. then (
1356 let remaining = 1. -. elapsed in
1357 let secs_remaining = (remaining /. elapsed) *. secs_elapsed in
1358 if secs_remaining > 120. then
1359 printf " (about %.0f minutes remaining) "
1360 (secs_remaining /. 60.)
1362 printf " (about %.0f seconds remaining) "
1368 else last_printed_at in
1370 copy bytes_sent last_printed_at
1379 (* Clean up and reboot. *)
1381 msgbox "virt-p2v completed"
1382 (sprintf "\nThe physical to virtual migration is complete.\n\nPlease verify the disk image(s) and configuration file on the remote host, and then start up the virtual machine by doing:\n\ncd %s\nvirsh define %s\n\nWhen you press [OK] this machine will reboot."
1383 remote_directory conf_filename)
1392 eprintf "usage: virt-p2v [ttyname]\n%!";
1395 (* Make sure that exceptions from 'main' get printed out on stdout
1396 * as well as stderr, since stderr is probably redirected to the
1397 * logfile, and so not visible to the user.
1399 let handle_exn f arg =
1401 with exn -> print_endline (Printexc.to_string exn); raise exn
1403 (* If the ISO image has an attachment then it could be a new version
1404 * of virt-p2v.ml (this script). Get the attachment and run it
1405 * instead. Useful mainly for testing, in conjunction with the
1406 * 'make update' target in the virt-p2v Makefile.
1408 let magic = "ISOATTACHMENT002"
1409 let magiclen = String.length magic (* = 16 bytes *)
1410 let trailerlen = magiclen + 8 + 8 (* magic + file start + true size *)
1412 let int64_of_string str =
1414 let add offs shift =
1417 (Int64.shift_left (Int64.of_int (Char.code str.[offs])) shift) !i
1419 add 0 56; add 1 48; add 2 40; add 3 32;
1420 add 4 24; add 5 16; add 6 8; add 7 0;
1423 let update ttyname =
1424 let cdrom = "/dev/cdrom" in
1425 let output = "/tmp/virt-p2v.ml" in
1428 let fd = openfile cdrom [O_RDONLY] 0 in
1429 ignore (LargeFile.lseek fd (Int64.of_int ~-trailerlen) SEEK_END);
1430 let buf = String.create magiclen in
1431 if read fd buf 0 magiclen <> magiclen || buf <> magic then (
1436 (* Read the size. *)
1437 let buf = String.create 8 in
1438 if read fd buf 0 8 <> 8 then
1439 failwith "cannot read attachment offset";
1440 let offset = int64_of_string buf in
1441 let buf = String.create 8 in
1442 if read fd buf 0 8 <> 8 then
1443 failwith "cannot read attachment size";
1444 let size = Int64.to_int (int64_of_string buf) in
1446 (* Seek to beginning of the attachment. *)
1447 ignore (LargeFile.lseek fd offset SEEK_SET);
1449 (* Copy out the attachment. *)
1450 let fd2 = openfile output [O_WRONLY; O_CREAT; O_TRUNC] 0o755 in
1451 let bufsize = 4 * 1024 in
1452 let buffer = String.create bufsize in
1453 let rec copy remaining =
1454 if remaining > 0 then (
1455 let n = min remaining bufsize in
1456 let n = read fd buffer 0 n in
1457 if n = 0 then failwith "corrupted or partial attachment";
1458 ignore (write fd2 buffer 0 n);
1459 copy (remaining - n)
1467 (* Run updated virt-p2v script. *)
1468 execv output [| output; ttyname |]
1470 Unix_error _ | Exit ->
1471 (* Some error, or no attachment, so keep running this script. *)
1472 handle_exn main (Some ttyname)
1474 (* Test harness for the Makefile. The Makefile invokes this script as
1475 * 'virt-p2v.ml --test' just to check it compiles. When it is running
1476 * from the actual live CD, there is a single parameter which is the
1477 * tty name (so usually 'virt-p2v.ml tty1').
1480 match Array.to_list Sys.argv with
1481 | [ _; "--test" ] -> () (* Makefile test - do nothing. *)
1482 | [ _; "--update"; ttyname ] -> (* Test for update and run. *)
1484 | [ _; ("--help"|"-help"|"-?"|"-h") ] -> usage ();
1485 | [ _; ttyname ] -> (* Run main with ttyname. *)
1486 handle_exn main (Some ttyname)
1487 | [ _ ] -> (* Interactive - no ttyname. *)
1488 handle_exn main None
1491 (* This file must end with a newline *)