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This command allows users to cheaply inject configuration files in the
initramfs stage without having to regenerate the whole initramfs (or
even a new OSTree commit). This will be useful for configuring services
involved in bringing up the root block device.
```
$ echo 'hello world' > /etc/foobar
$ rpm-ostree ex initramfs-etc --track /etc/foobar
Staging deployment... done
Run "systemctl reboot" to start a reboot
$ rpm-ostree status
State: idle
Deployments:
ostree://fedora:fedora/x86_64/coreos/testing-devel
Version: 32.20200716.dev.1 (2020-07-16T02:47:29Z)
Commit: 9a817d75bef81b955179be6e602d1e6ae350645b6323231a62ba2ee6e5b9644b
GPGSignature: (unsigned)
InitramfsEtc: /etc/foobar
● ostree://fedora:fedora/x86_64/coreos/testing-devel
Version: 32.20200716.dev.1 (2020-07-16T02:47:29Z)
Commit: 9a817d75bef81b955179be6e602d1e6ae350645b6323231a62ba2ee6e5b9644b
GPGSignature: (unsigned)
$ reboot
(boot into rd.break)
sh-5.0# cat /etc/foobar
hello world
```
See the libostree side of this at:
ostreedev/ostree#2155
Lots more discussions in:
coreos/fedora-coreos-tracker#94- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- | ||
| * | ||
| * Copyright (C) 2020 Jonathan Lebon <jonathan@jlebon.com> | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published | ||
| * by the Free Software Foundation; either version 2 of the licence or (at | ||
| * your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General | ||
| * Public License along with this library; if not, write to the | ||
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, | ||
| * Boston, MA 02111-1307, USA. | ||
| */ | ||
|
|
||
| #include "config.h" | ||
|
|
||
| #include <string.h> | ||
| #include <glib-unix.h> | ||
|
|
||
| #include "rpmostree-ex-builtins.h" | ||
| #include "rpmostree-libbuiltin.h" | ||
| #include "rpmostree-dbus-helpers.h" | ||
|
|
||
| #include <libglnx.h> | ||
|
|
||
| static char *opt_osname; | ||
| static gboolean opt_force_sync; | ||
| static char **opt_track; | ||
| static char **opt_untrack; | ||
| static gboolean opt_untrack_all; | ||
| static gboolean opt_reboot; | ||
| static gboolean opt_lock_finalization; | ||
| static gboolean opt_unchanged_exit_77; | ||
|
|
||
| static GOptionEntry option_entries[] = { | ||
| { "os", 0, 0, G_OPTION_ARG_STRING, &opt_osname, "Operate on provided OSNAME", "OSNAME" }, | ||
| { "force-sync", 0, 0, G_OPTION_ARG_NONE, &opt_force_sync, "Deploy a new tree with the latest tracked /etc files", NULL }, | ||
| { "track", 0, 0, G_OPTION_ARG_STRING_ARRAY, &opt_track, "Track root /etc file", "FILE" }, | ||
| { "untrack", 0, 0, G_OPTION_ARG_STRING_ARRAY, &opt_untrack, "Untrack root /etc file", "FILE" }, | ||
| { "untrack-all", 0, 0, G_OPTION_ARG_NONE, &opt_untrack_all, "Untrack all root /etc files", NULL }, | ||
| { "reboot", 'r', 0, G_OPTION_ARG_NONE, &opt_reboot, "Initiate a reboot after operation is complete", NULL }, | ||
| { "lock-finalization", 0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, &opt_lock_finalization, "Prevent automatic deployment finalization on shutdown", NULL }, | ||
| { "unchanged-exit-77", 0, 0, G_OPTION_ARG_NONE, &opt_unchanged_exit_77, "If no new deployment made, exit 77", NULL }, | ||
|
|
||
| { NULL } | ||
| }; | ||
|
|
||
| gboolean | ||
| rpmostree_ex_builtin_initramfs_etc (int argc, | ||
| char **argv, | ||
| RpmOstreeCommandInvocation *invocation, | ||
| GCancellable *cancellable, | ||
| GError **error) | ||
| { | ||
| g_autoptr(GOptionContext) context = g_option_context_new (""); | ||
|
|
||
| _cleanup_peer_ GPid peer_pid = 0; | ||
| glnx_unref_object RPMOSTreeSysroot *sysroot_proxy = NULL; | ||
| if (!rpmostree_option_context_parse (context, | ||
| option_entries, | ||
| &argc, &argv, | ||
| invocation, | ||
| cancellable, | ||
| NULL, NULL, | ||
| &sysroot_proxy, | ||
| &peer_pid, | ||
| NULL, | ||
| error)) | ||
| return FALSE; | ||
|
|
||
| glnx_unref_object RPMOSTreeOS *os_proxy = NULL; | ||
| if (!rpmostree_load_os_proxy (sysroot_proxy, opt_osname, | ||
| cancellable, &os_proxy, error)) | ||
| return FALSE; | ||
|
|
||
| g_autoptr(GVariant) previous_deployment = rpmostree_os_dup_default_deployment (os_proxy); | ||
|
|
||
| if (!(opt_track || opt_untrack || opt_untrack_all || opt_force_sync)) | ||
| { | ||
| if (opt_reboot) | ||
| return glnx_throw (error, "Cannot use ---reboot without --track, --untrack, --untrack-all, or --force-sync"); | ||
|
|
||
| g_autofree char **files = NULL; | ||
| g_autoptr(GVariant) deployments = rpmostree_sysroot_dup_deployments (sysroot_proxy); | ||
| if (g_variant_n_children (deployments) > 0) | ||
| { | ||
| g_autoptr(GVariant) pending = g_variant_get_child_value (deployments, 0); | ||
| g_auto(GVariantDict) dict; | ||
| g_variant_dict_init (&dict, pending); | ||
|
|
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| g_variant_dict_lookup (&dict, "initramfs-etc", "^a&s", &files); | ||
| } | ||
|
|
||
| if (!files || !*files) | ||
| g_print ("No tracked files.\n"); | ||
| else | ||
| { | ||
| g_print ("Tracked files:\n"); | ||
| for (char **it = files; it && *it; it++) | ||
| g_print (" %s\n", *it); | ||
| } | ||
|
|
||
| return TRUE; /* note early return */ | ||
| } | ||
|
|
||
| char *empty_strv[] = {NULL}; | ||
| if (!opt_track) | ||
| opt_track = empty_strv; | ||
| if (!opt_untrack) | ||
| opt_untrack = empty_strv; | ||
|
|
||
| GVariantDict dict; | ||
| g_variant_dict_init (&dict, NULL); | ||
| g_variant_dict_insert (&dict, "reboot", "b", opt_reboot); | ||
| g_variant_dict_insert (&dict, "initiating-command-line", "s", invocation->command_line); | ||
| g_variant_dict_insert (&dict, "lock-finalization", "b", opt_lock_finalization); | ||
| g_autoptr(GVariant) options = g_variant_ref_sink (g_variant_dict_end (&dict)); | ||
|
|
||
| g_autofree char *transaction_address = NULL; | ||
| if (!rpmostree_os_call_initramfs_etc_sync (os_proxy, | ||
| (const char *const*)opt_track, | ||
| (const char *const*)opt_untrack, | ||
| opt_untrack_all, | ||
| opt_force_sync, | ||
| options, | ||
| &transaction_address, | ||
| cancellable, | ||
| error)) | ||
| return FALSE; | ||
|
|
||
| if (!rpmostree_transaction_get_response_sync (sysroot_proxy, | ||
| transaction_address, | ||
| cancellable, | ||
| error)) | ||
| return FALSE; | ||
|
|
||
| if (!opt_reboot) | ||
| { | ||
| if (!rpmostree_has_new_default_deployment (os_proxy, previous_deployment)) | ||
| { | ||
| if (opt_unchanged_exit_77) | ||
| invocation->exit_code = RPM_OSTREE_EXIT_UNCHANGED; | ||
| return TRUE; | ||
| } | ||
|
|
||
| g_print ("Run \"systemctl reboot\" to start a reboot\n"); | ||
| } | ||
|
|
||
| return TRUE; | ||
| } |
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