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https://github.com/libguestfs/libguestfs.git
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107 lines
3.3 KiB
OCaml
107 lines
3.3 KiB
OCaml
(* virt-sysprep
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* Copyright (C) 2012 Red Hat Inc.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Printf
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open Common_utils
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open Sysprep_operation
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open Common_gettext.Gettext
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module G = Guestfs
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let hostname = ref "localhost.localdomain"
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let hostname_perform g root =
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let typ = g#inspect_get_type root in
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let distro = g#inspect_get_distro root in
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let major_version = g#inspect_get_major_version root in
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(* Replace <key>=... entry in file. The code assumes it's a small,
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* plain text file.
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*)
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let replace_line_in_file filename key value =
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let content =
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if g#is_file filename then (
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let lines = Array.to_list (g#read_lines filename) in
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let lines = List.filter (
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fun line -> not (string_prefix line (key ^ "="))
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) lines in
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let lines = lines @ [sprintf "%s=%s" key value] in
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String.concat "\n" lines ^ "\n"
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) else (
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sprintf "%s=%s\n" key value
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) in
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g#write filename content
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in
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let update_etc_hostname () =
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g#write "/etc/hostname" !hostname
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in
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let update_etc_machine_info () =
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replace_line_in_file "/etc/machine-info" "PRETTY_HOSTNAME" !hostname
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in
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match typ, distro, major_version with
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(* Fedora 18 (hence RHEL 7+) changed to using /etc/hostname
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* (RHBZ#881953, RHBZ#858696). We may also need to modify
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* /etc/machine-info (RHBZ#890027).
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*)
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| "linux", "fedora", v when v >= 18 ->
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update_etc_hostname ();
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update_etc_machine_info ();
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[ `Created_files ]
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| "linux", ("rhel"|"centos"|"scientificlinux"|"redhat-based"), v when v >= 7 ->
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update_etc_hostname ();
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update_etc_machine_info ();
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[ `Created_files ]
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| "linux", ("debian"|"ubuntu"), _ ->
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update_etc_hostname ();
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[ `Created_files ]
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| "linux", ("fedora"|"rhel"|"centos"|"scientificlinux"|"redhat-based"), _ ->
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replace_line_in_file "/etc/sysconfig/network" "HOSTNAME" !hostname;
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[ `Created_files ]
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| "linux", ("opensuse"|"sles"|"suse-based"), _ ->
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g#write "/etc/HOSTNAME" !hostname;
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[ `Created_files ]
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| _ -> []
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let hostname_op = {
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name = "hostname";
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enabled_by_default = true;
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heading = s_"Change the hostname of the guest";
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pod_description = Some (s_"\
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This operation changes the hostname of the guest to the value
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given in the I<--hostname> parameter.
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If the I<--hostname> parameter is not given, then the hostname is changed
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to C<localhost.localdomain>.");
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extra_args = [
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("--hostname", Arg.Set_string hostname, s_"hostname" ^ " " ^ s_"New hostname"),
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s_"\
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Change the hostname. If not given, defaults to C<localhost.localdomain>."
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];
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perform_on_filesystems = Some hostname_perform;
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perform_on_devices = None;
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}
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let () = register_operation hostname_op
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