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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <uchar.h>
#include <unistd.h>
#include "bootctl.h"
#include "bootctl-set-efivar.h"
#include "efivars.h"
#include "efi-loader.h"
#include "stdio-util.h"
#include "utf8.h"
#include "virt.h"
static int parse_timeout(const char *arg1, char16_t **ret_timeout, size_t *ret_timeout_size) {
char utf8[DECIMAL_STR_MAX(usec_t)];
char16_t *encoded;
usec_t timeout;
bool menu_disabled = false;
int r;
assert(arg1);
assert(ret_timeout);
assert(ret_timeout_size);
assert_cc(STRLEN("menu-disabled") < ELEMENTSOF(utf8));
/* Note: Since there is no way to query if the bootloader supports the string tokens, we explicitly
* set their numerical value(s) instead. This means that some of the sd-boot internal ABI has leaked
* although the ship has sailed and the side-effects are self-contained.
*/
if (streq(arg1, "menu-force"))
timeout = USEC_INFINITY;
else if (streq(arg1, "menu-hidden"))
timeout = 0;
else if (streq(arg1, "menu-disabled")) {
uint64_t loader_features = 0;
(void) efi_loader_get_features(&loader_features);
if (!(loader_features & EFI_LOADER_FEATURE_MENU_DISABLE)) {
if (!arg_graceful)
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Loader does not support 'menu-disabled': %m");
log_warning("Loader does not support 'menu-disabled', setting anyway.");
}
menu_disabled = true;
} else {
r = parse_time(arg1, &timeout, USEC_PER_SEC);
if (r < 0)
return log_error_errno(r, "Failed to parse timeout '%s': %m", arg1);
if (timeout != USEC_INFINITY && timeout > UINT32_MAX * USEC_PER_SEC)
log_warning("Timeout is too long and will be treated as 'menu-force' instead.");
}
if (menu_disabled)
xsprintf(utf8, "menu-disabled");
else
xsprintf(utf8, USEC_FMT, MIN(timeout / USEC_PER_SEC, UINT32_MAX));
encoded = utf8_to_utf16(utf8, SIZE_MAX);
if (!encoded)
return log_oom();
*ret_timeout = encoded;
*ret_timeout_size = char16_strlen(encoded) * 2 + 2;
return 0;
}
static int parse_loader_entry_target_arg(const char *arg1, char16_t **ret_target, size_t *ret_target_size) {
char16_t *encoded = NULL;
int r;
assert(arg1);
assert(ret_target);
assert(ret_target_size);
if (streq(arg1, "@current")) {
r = efi_get_variable(EFI_LOADER_VARIABLE(LoaderEntrySelected), NULL, (void *) ret_target, ret_target_size);
if (r < 0)
return log_error_errno(r, "Failed to get EFI variable 'LoaderEntrySelected': %m");
} else if (streq(arg1, "@oneshot")) {
r = efi_get_variable(EFI_LOADER_VARIABLE(LoaderEntryOneShot), NULL, (void *) ret_target, ret_target_size);
if (r < 0)
return log_error_errno(r, "Failed to get EFI variable 'LoaderEntryOneShot': %m");
} else if (streq(arg1, "@default")) {
r = efi_get_variable(EFI_LOADER_VARIABLE(LoaderEntryDefault), NULL, (void *) ret_target, ret_target_size);
if (r < 0)
return log_error_errno(r, "Failed to get EFI variable 'LoaderEntryDefault': %m");
} else if (arg1[0] == '@' && !streq(arg1, "@saved"))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unsupported special entry identifier: %s", arg1);
else {
encoded = utf8_to_utf16(arg1, SIZE_MAX);
if (!encoded)
return log_oom();
*ret_target = encoded;
*ret_target_size = char16_strlen(encoded) * 2 + 2;
}
return 0;
}
int verb_set_efivar(int argc, char *argv[], void *userdata) {
int r;
if (arg_root)
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"Acting on %s, skipping EFI variable setup.",
arg_image ? "image" : "root directory");
if (!is_efi_boot())
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"Not booted with UEFI.");
if (access(EFIVAR_PATH(EFI_LOADER_VARIABLE(LoaderInfo)), F_OK) < 0) {
if (errno == ENOENT) {
log_error_errno(errno, "Not booted with a supported boot loader.");
return -EOPNOTSUPP;
}
return log_error_errno(errno, "Failed to detect whether boot loader supports '%s' operation: %m", argv[0]);
}
if (detect_container() > 0)
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"'%s' operation not supported in a container.",
argv[0]);
if (!arg_touch_variables)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"'%s' operation cannot be combined with --no-variables.",
argv[0]);
const char *variable;
int (* arg_parser)(const char *, char16_t **, size_t *);
if (streq(argv[0], "set-default")) {
variable = EFI_LOADER_VARIABLE(LoaderEntryDefault);
arg_parser = parse_loader_entry_target_arg;
} else if (streq(argv[0], "set-oneshot")) {
variable = EFI_LOADER_VARIABLE(LoaderEntryOneShot);
arg_parser = parse_loader_entry_target_arg;
} else if (streq(argv[0], "set-timeout")) {
variable = EFI_LOADER_VARIABLE(LoaderConfigTimeout);
arg_parser = parse_timeout;
} else if (streq(argv[0], "set-timeout-oneshot")) {
variable = EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot);
arg_parser = parse_timeout;
} else
assert_not_reached();
if (isempty(argv[1])) {
r = efi_set_variable(variable, NULL, 0);
if (r < 0 && r != -ENOENT)
return log_error_errno(r, "Failed to remove EFI variable '%s': %m", variable);
} else {
_cleanup_free_ char16_t *value = NULL;
size_t value_size = 0;
r = arg_parser(argv[1], &value, &value_size);
if (r < 0)
return r;
r = efi_set_variable(variable, value, value_size);
if (r < 0)
return log_error_errno(r, "Failed to update EFI variable '%s': %m", variable);
}
return 0;
}
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