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bootctl: add is-installed verb

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Fixes: #9428
This commit is contained in:
Lennart Poettering 2019-07-22 15:05:29 +02:00
parent 39867bb9fb
commit a2aa605d22
2 changed files with 58 additions and 9 deletions
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9
man/bootctl.xml
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@ -137,6 +137,15 @@
<citerefentry><refentrytitle>systemd-boot-system-token.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>is-installed</option></term>
<listitem><para>Checks whether <command>systemd-boot</command> is installed in the ESP. Note that a
single ESP might host multiple boot loaders; this hence checks whether
<command>systemd-boot</command> is one (of possibly many) installed boot loaders — and neither
whether it is the default nor whether it is registered in any EFI variables.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>list</option></term>

58
src/boot/bootctl.c
View File

@ -1051,6 +1051,7 @@ static int help(int argc, char *argv[], void *userdata) {
" update Update systemd-boot in the ESP and EFI variables\n"
" remove Remove systemd-boot from the ESP and EFI variables\n"
" random-seed Initialize random seed in ESP and EFI variables\n"
" is-installed Test whether systemd-boot is installed in the ESP\n"
"\nBoot Loader Entries Commands:\n"
" list List boot loader entries\n"
" set-default ID Set default boot loader entry\n"
@ -1602,6 +1603,44 @@ static int verb_remove(int argc, char *argv[], void *userdata) {
return r;
}
static int verb_is_installed(int argc, char *argv[], void *userdata) {
_cleanup_free_ char *p = NULL;
int r;
r = acquire_esp(false, NULL, NULL, NULL, NULL);
if (r < 0)
return r;
/* Tests whether systemd-boot is installed. It's not obvious what to use as check here: we could
* check EFI variables, we could check what binary /EFI/BOOT/BOOT*.EFI points to, or whether the
* loader entries directory exists. Here we opted to check whether /EFI/systemd/ is non-empty, which
* should be a suitable and very minimal check for a number of reasons:
*
* → The check is architecture independent (i.e. we check if any systemd-boot loader is installed, not a
* specific one.)
*
* → It doesn't assume we are the only boot loader (i.e doesn't check if we own the main
* /EFI/BOOT/BOOT*.EFI fallback binary.
*
* → It specifically checks for systemd-boot, not for other boot loaders (which a check for
* /boot/loader/entries would do). */
p = path_join(arg_esp_path, "/EFI/systemd/");
if (!p)
return log_oom();
r = dir_is_empty(p);
if (r > 0 || r == -ENOENT) {
puts("no");
return EXIT_FAILURE;
}
if (r < 0)
return log_error_errno(r, "Failed to detect whether systemd-boot is installed: %m");
puts("yes");
return EXIT_SUCCESS;
}
static int verb_set_default(int argc, char *argv[], void *userdata) {
const char *name;
int r;
@ -1667,15 +1706,16 @@ static int verb_random_seed(int argc, char *argv[], void *userdata) {
static int bootctl_main(int argc, char *argv[]) {
static const Verb verbs[] = {
{ "help", VERB_ANY, VERB_ANY, 0, help },
{ "status", VERB_ANY, 1, VERB_DEFAULT, verb_status },
{ "install", VERB_ANY, 1, 0, verb_install },
{ "update", VERB_ANY, 1, 0, verb_install },
{ "remove", VERB_ANY, 1, 0, verb_remove },
{ "random-seed", VERB_ANY, 1, 0, verb_random_seed },
{ "list", VERB_ANY, 1, 0, verb_list },
{ "set-default", 2, 2, 0, verb_set_default },
{ "set-oneshot", 2, 2, 0, verb_set_default },
{ "help", VERB_ANY, VERB_ANY, 0, help },
{ "status", VERB_ANY, 1, VERB_DEFAULT, verb_status },
{ "install", VERB_ANY, 1, 0, verb_install },
{ "update", VERB_ANY, 1, 0, verb_install },
{ "remove", VERB_ANY, 1, 0, verb_remove },
{ "random-seed", VERB_ANY, 1, 0, verb_random_seed },
{ "is-installed", VERB_ANY, 1, 0, verb_is_installed },
{ "list", VERB_ANY, 1, 0, verb_list },
{ "set-default", 2, 2, 0, verb_set_default },
{ "set-oneshot", 2, 2, 0, verb_set_default },
{}
};