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bootctl.c
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <linux/magic.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <unistd.h>
#include "sd-id128.h"
#include "alloc-util.h"
#include "blkid-util.h"
#include "bootspec.h"
#include "copy.h"
#include "devnum-util.h"
#include "dirent-util.h"
#include "efi-api.h"
#include "efi-loader.h"
#include "efivars.h"
#include "env-file.h"
#include "env-util.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
#include "find-esp.h"
#include "fs-util.h"
#include "glyph-util.h"
#include "main-func.h"
#include "mkdir.h"
#include "os-util.h"
#include "pager.h"
#include "parse-argument.h"
#include "parse-util.h"
#include "pretty-print.h"
#include "random-util.h"
#include "rm-rf.h"
#include "stat-util.h"
#include "stdio-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "sync-util.h"
#include "terminal-util.h"
#include "tmpfile-util.h"
#include "tmpfile-util-label.h"
#include "tpm2-util.h"
#include "umask-util.h"
#include "utf8.h"
#include "util.h"
#include "verbs.h"
#include "virt.h"
static char *arg_esp_path = NULL;
static char *arg_xbootldr_path = NULL;
static bool arg_print_esp_path = false;
static bool arg_print_dollar_boot_path = false;
static bool arg_touch_variables = true;
static PagerFlags arg_pager_flags = 0;
static bool arg_graceful = false;
static int arg_make_entry_directory = false; /* tri-state: < 0 for automatic logic */
static sd_id128_t arg_machine_id = SD_ID128_NULL;
static char *arg_install_layout = NULL;
static enum {
ARG_ENTRY_TOKEN_MACHINE_ID,
ARG_ENTRY_TOKEN_OS_IMAGE_ID,
ARG_ENTRY_TOKEN_OS_ID,
ARG_ENTRY_TOKEN_LITERAL,
ARG_ENTRY_TOKEN_AUTO,
} arg_entry_token_type = ARG_ENTRY_TOKEN_AUTO;
static char *arg_entry_token = NULL;
static JsonFormatFlags arg_json_format_flags = JSON_FORMAT_OFF;
STATIC_DESTRUCTOR_REGISTER(arg_esp_path, freep);
STATIC_DESTRUCTOR_REGISTER(arg_xbootldr_path, freep);
STATIC_DESTRUCTOR_REGISTER(arg_install_layout, freep);
STATIC_DESTRUCTOR_REGISTER(arg_entry_token, freep);
static const char *arg_dollar_boot_path(void) {
/* $BOOT shall be the XBOOTLDR partition if it exists, and otherwise the ESP */
return arg_xbootldr_path ?: arg_esp_path;
}
static int acquire_esp(
bool unprivileged_mode,
bool graceful,
uint32_t *ret_part,
uint64_t *ret_pstart,
uint64_t *ret_psize,
sd_id128_t *ret_uuid,
dev_t *ret_devid) {
char *np;
int r;
/* Find the ESP, and log about errors. Note that find_esp_and_warn() will log in all error cases on
* its own, except for ENOKEY (which is good, we want to show our own message in that case,
* suggesting use of --esp-path=) and EACCESS (only when we request unprivileged mode; in this case
* we simply eat up the error here, so that --list and --status work too, without noise about
* this). */
r = find_esp_and_warn(arg_esp_path, unprivileged_mode, &np, ret_part, ret_pstart, ret_psize, ret_uuid, ret_devid);
if (r == -ENOKEY) {
if (graceful)
return log_info_errno(r, "Couldn't find EFI system partition, skipping.");
return log_error_errno(r,
"Couldn't find EFI system partition. It is recommended to mount it to /boot or /efi.\n"
"Alternatively, use --esp-path= to specify path to mount point.");
}
if (r < 0)
return r;
free_and_replace(arg_esp_path, np);
log_debug("Using EFI System Partition at %s.", arg_esp_path);
return 0;
}
static int acquire_xbootldr(
bool unprivileged_mode,
sd_id128_t *ret_uuid,
dev_t *ret_devid) {
char *np;
int r;
r = find_xbootldr_and_warn(arg_xbootldr_path, unprivileged_mode, &np, ret_uuid, ret_devid);
if (r == -ENOKEY) {
log_debug_errno(r, "Didn't find an XBOOTLDR partition, using the ESP as $BOOT.");
arg_xbootldr_path = mfree(arg_xbootldr_path);
if (ret_uuid)
*ret_uuid = SD_ID128_NULL;
if (ret_devid)
*ret_devid = 0;
return 0;
}
if (r < 0)
return r;
free_and_replace(arg_xbootldr_path, np);
log_debug("Using XBOOTLDR partition at %s as $BOOT.", arg_xbootldr_path);
return 1;
}
static int load_etc_machine_id(void) {
int r;
r = sd_id128_get_machine(&arg_machine_id);
if (IN_SET(r, -ENOENT, -ENOMEDIUM)) /* Not set or empty */
return 0;
if (r < 0)
return log_error_errno(r, "Failed to get machine-id: %m");
log_debug("Loaded machine ID %s from /etc/machine-id.", SD_ID128_TO_STRING(arg_machine_id));
return 0;
}
static int load_etc_machine_info(void) {
/* systemd v250 added support to store the kernel-install layout setting and the machine ID to use
* for setting up the ESP in /etc/machine-info. The newer /etc/kernel/entry-token file, as well as
* the $layout field in /etc/kernel/install.conf are better replacements for this though, hence this
* has been deprecated and is only returned for compatibility. */
_cleanup_free_ char *s = NULL, *layout = NULL;
int r;
r = parse_env_file(NULL, "/etc/machine-info",
"KERNEL_INSTALL_LAYOUT", &layout,
"KERNEL_INSTALL_MACHINE_ID", &s);
if (r == -ENOENT)
return 0;
if (r < 0)
return log_error_errno(r, "Failed to parse /etc/machine-info: %m");
if (!isempty(s)) {
log_notice("Read $KERNEL_INSTALL_MACHINE_ID from /etc/machine-info. Please move it to /etc/kernel/entry-token.");
r = sd_id128_from_string(s, &arg_machine_id);
if (r < 0)
return log_error_errno(r, "Failed to parse KERNEL_INSTALL_MACHINE_ID=%s in /etc/machine-info: %m", s);
log_debug("Loaded KERNEL_INSTALL_MACHINE_ID=%s from KERNEL_INSTALL_MACHINE_ID in /etc/machine-info.",
SD_ID128_TO_STRING(arg_machine_id));
}
if (!isempty(layout)) {
log_notice("Read $KERNEL_INSTALL_LAYOUT from /etc/machine-info. Please move it to the layout= setting of /etc/kernel/install.conf.");
log_debug("KERNEL_INSTALL_LAYOUT=%s is specified in /etc/machine-info.", layout);
free_and_replace(arg_install_layout, layout);
}
return 0;
}
static int load_etc_kernel_install_conf(void) {
_cleanup_free_ char *layout = NULL;
int r;
r = parse_env_file(NULL, "/etc/kernel/install.conf",
"layout", &layout);
if (r == -ENOENT)
return 0;
if (r < 0)
return log_error_errno(r, "Failed to parse /etc/kernel/install.conf: %m");
if (!isempty(layout)) {
log_debug("layout=%s is specified in /etc/machine-info.", layout);
free_and_replace(arg_install_layout, layout);
}
return 0;
}
static int settle_entry_token(void) {
int r;
switch (arg_entry_token_type) {
case ARG_ENTRY_TOKEN_AUTO: {
_cleanup_free_ char *buf = NULL;
r = read_one_line_file("/etc/kernel/entry-token", &buf);
if (r < 0 && r != -ENOENT)
return log_error_errno(r, "Failed to read /etc/kernel/entry-token: %m");
if (!isempty(buf)) {
free_and_replace(arg_entry_token, buf);
arg_entry_token_type = ARG_ENTRY_TOKEN_LITERAL;
} else if (sd_id128_is_null(arg_machine_id)) {
_cleanup_free_ char *id = NULL, *image_id = NULL;
r = parse_os_release(NULL,
"IMAGE_ID", &image_id,
"ID", &id);
if (r < 0)
return log_error_errno(r, "Failed to load /etc/os-release: %m");
if (!isempty(image_id)) {
free_and_replace(arg_entry_token, image_id);
arg_entry_token_type = ARG_ENTRY_TOKEN_OS_IMAGE_ID;
} else if (!isempty(id)) {
free_and_replace(arg_entry_token, id);
arg_entry_token_type = ARG_ENTRY_TOKEN_OS_ID;
} else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No machine ID set, and /etc/os-release carries no ID=/IMAGE_ID= fields.");
} else {
r = free_and_strdup_warn(&arg_entry_token, SD_ID128_TO_STRING(arg_machine_id));
if (r < 0)
return r;
arg_entry_token_type = ARG_ENTRY_TOKEN_MACHINE_ID;
}
break;
}
case ARG_ENTRY_TOKEN_MACHINE_ID:
if (sd_id128_is_null(arg_machine_id))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No machine ID set.");
r = free_and_strdup_warn(&arg_entry_token, SD_ID128_TO_STRING(arg_machine_id));
if (r < 0)
return r;
break;
case ARG_ENTRY_TOKEN_OS_IMAGE_ID: {
_cleanup_free_ char *buf = NULL;
r = parse_os_release(NULL, "IMAGE_ID", &buf);
if (r < 0)
return log_error_errno(r, "Failed to load /etc/os-release: %m");
if (isempty(buf))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "IMAGE_ID= field not set in /etc/os-release.");
free_and_replace(arg_entry_token, buf);
break;
}
case ARG_ENTRY_TOKEN_OS_ID: {
_cleanup_free_ char *buf = NULL;
r = parse_os_release(NULL, "ID", &buf);
if (r < 0)
return log_error_errno(r, "Failed to load /etc/os-release: %m");
if (isempty(buf))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "ID= field not set in /etc/os-release.");
free_and_replace(arg_entry_token, buf);
break;
}
case ARG_ENTRY_TOKEN_LITERAL:
assert(!isempty(arg_entry_token)); /* already filled in by command line parser */
break;
}
if (isempty(arg_entry_token) || !string_is_safe(arg_entry_token))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected entry token not valid: %s", arg_entry_token);
log_debug("Using entry token: %s", arg_entry_token);
return 0;
}
static bool use_boot_loader_spec_type1(void) {
/* If the layout is not specified, or if it is set explicitly to "bls" we assume Boot Loader
* Specification Type #1 is the chosen format for our boot loader entries */
return !arg_install_layout || streq(arg_install_layout, "bls");
}
static int settle_make_entry_directory(void) {
int r;
r = load_etc_machine_id();
if (r < 0)
return r;
r = load_etc_machine_info();
if (r < 0)
return r;
r = load_etc_kernel_install_conf();
if (r < 0)
return r;
r = settle_entry_token();
if (r < 0)
return r;
bool layout_type1 = use_boot_loader_spec_type1();
if (arg_make_entry_directory < 0) { /* Automatic mode */
if (layout_type1) {
if (arg_entry_token == ARG_ENTRY_TOKEN_MACHINE_ID) {
r = path_is_temporary_fs("/etc/machine-id");
if (r < 0)
return log_debug_errno(r, "Couldn't determine whether /etc/machine-id is on a temporary file system: %m");
arg_make_entry_directory = r == 0;
} else
arg_make_entry_directory = true;
} else
arg_make_entry_directory = false;
}
if (arg_make_entry_directory > 0 && !layout_type1)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"KERNEL_INSTALL_LAYOUT=%s is configured, but Boot Loader Specification Type #1 entry directory creation was requested.",
arg_install_layout);
return 0;
}
/* search for "#### LoaderInfo: systemd-boot 218 ####" string inside the binary */
static int get_file_version(int fd, char **v) {
struct stat st;
char *buf;
const char *s, *e;
char *x = NULL;
int r;
assert(fd >= 0);
assert(v);
if (fstat(fd, &st) < 0)
return log_error_errno(errno, "Failed to stat EFI binary: %m");
r = stat_verify_regular(&st);
if (r < 0)
return log_error_errno(r, "EFI binary is not a regular file: %m");
if (st.st_size < 27 || file_offset_beyond_memory_size(st.st_size)) {
*v = NULL;
return 0;
}
buf = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (buf == MAP_FAILED)
return log_error_errno(errno, "Failed to memory map EFI binary: %m");
s = mempmem_safe(buf, st.st_size - 8, "#### LoaderInfo: ", 17);
if (!s)
goto finish;
e = memmem_safe(s, st.st_size - (s - buf), " ####", 5);
if (!e || e - s < 3) {
r = log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Malformed version string.");
goto finish;
}
x = strndup(s, e - s);
if (!x) {
r = log_oom();
goto finish;
}
r = 1;
finish:
(void) munmap(buf, st.st_size);
*v = x;
return r;
}
static int enumerate_binaries(const char *esp_path, const char *path, const char *prefix) {
_cleanup_closedir_ DIR *d = NULL;
const char *p;
int c = 0, r;
assert(esp_path);
assert(path);
p = prefix_roota(esp_path, path);
d = opendir(p);
if (!d) {
if (errno == ENOENT)
return 0;
return log_error_errno(errno, "Failed to read \"%s\": %m", p);
}
FOREACH_DIRENT(de, d, break) {
_cleanup_free_ char *v = NULL;
_cleanup_close_ int fd = -1;
if (!endswith_no_case(de->d_name, ".efi"))
continue;
if (prefix && !startswith_no_case(de->d_name, prefix))
continue;
fd = openat(dirfd(d), de->d_name, O_RDONLY|O_CLOEXEC);
if (fd < 0)
return log_error_errno(errno, "Failed to open \"%s/%s\" for reading: %m", p, de->d_name);
r = get_file_version(fd, &v);
if (r < 0)
return r;
if (r > 0)
printf(" File: %s/%s/%s (%s%s%s)\n", special_glyph(SPECIAL_GLYPH_TREE_RIGHT), path, de->d_name, ansi_highlight(), v, ansi_normal());
else
printf(" File: %s/%s/%s\n", special_glyph(SPECIAL_GLYPH_TREE_RIGHT), path, de->d_name);
c++;
}
return c;
}
static int status_binaries(const char *esp_path, sd_id128_t partition) {
int r;
printf("Available Boot Loaders on ESP:\n");
if (!esp_path) {
printf(" ESP: Cannot find or access mount point of ESP.\n\n");
return -ENOENT;
}
printf(" ESP: %s", esp_path);
if (!sd_id128_is_null(partition))
printf(" (/dev/disk/by-partuuid/" SD_ID128_UUID_FORMAT_STR ")", SD_ID128_FORMAT_VAL(partition));
printf("\n");
r = enumerate_binaries(esp_path, "EFI/systemd", NULL);
if (r < 0)
goto finish;
if (r == 0)
log_info("systemd-boot not installed in ESP.");
r = enumerate_binaries(esp_path, "EFI/BOOT", "boot");
if (r < 0)
goto finish;
if (r == 0)
log_info("No default/fallback boot loader installed in ESP.");
r = 0;
finish:
printf("\n");
return r;
}
static int print_efi_option(uint16_t id, bool in_order) {
_cleanup_free_ char *title = NULL;
_cleanup_free_ char *path = NULL;
sd_id128_t partition;
bool active;
int r;
r = efi_get_boot_option(id, &title, &partition, &path, &active);
if (r < 0)
return r;
/* print only configured entries with partition information */
if (!path || sd_id128_is_null(partition))
return 0;
efi_tilt_backslashes(path);
printf(" Title: %s%s%s\n", ansi_highlight(), strna(title), ansi_normal());
printf(" ID: 0x%04X\n", id);
printf(" Status: %sactive%s\n", active ? "" : "in", in_order ? ", boot-order" : "");
printf(" Partition: /dev/disk/by-partuuid/" SD_ID128_UUID_FORMAT_STR "\n",
SD_ID128_FORMAT_VAL(partition));
printf(" File: %s%s\n", special_glyph(SPECIAL_GLYPH_TREE_RIGHT), path);
printf("\n");
return 0;
}
static int status_variables(void) {
_cleanup_free_ uint16_t *options = NULL, *order = NULL;
int n_options, n_order;
n_options = efi_get_boot_options(&options);
if (n_options == -ENOENT)
return log_error_errno(n_options,
"Failed to access EFI variables, efivarfs"
" needs to be available at /sys/firmware/efi/efivars/.");
if (n_options < 0)
return log_error_errno(n_options, "Failed to read EFI boot entries: %m");
n_order = efi_get_boot_order(&order);
if (n_order == -ENOENT)
n_order = 0;
else if (n_order < 0)
return log_error_errno(n_order, "Failed to read EFI boot order: %m");
/* print entries in BootOrder first */
printf("Boot Loaders Listed in EFI Variables:\n");
for (int i = 0; i < n_order; i++)
print_efi_option(order[i], true);
/* print remaining entries */
for (int i = 0; i < n_options; i++) {
for (int j = 0; j < n_order; j++)
if (options[i] == order[j])
goto next_option;
print_efi_option(options[i], false);
next_option:
continue;
}
return 0;
}
static int boot_entry_file_check(const char *root, const char *p) {
_cleanup_free_ char *path = NULL;
path = path_join(root, p);
if (!path)
return log_oom();
return RET_NERRNO(access(path, F_OK));
}
static void boot_entry_file_list(const char *field, const char *root, const char *p, int *ret_status) {
int status = boot_entry_file_check(root, p);
printf("%13s%s ", strempty(field), field ? ":" : " ");
if (status < 0) {
errno = -status;
printf("%s%s%s (%m)\n", ansi_highlight_red(), p, ansi_normal());
} else
printf("%s\n", p);
if (*ret_status == 0 && status < 0)
*ret_status = status;
}
static const char* const boot_entry_type_table[_BOOT_ENTRY_TYPE_MAX] = {
[BOOT_ENTRY_CONF] = "Boot Loader Specification Type #1 (.conf)",
[BOOT_ENTRY_UNIFIED] = "Boot Loader Specification Type #2 (.efi)",
[BOOT_ENTRY_LOADER] = "Reported by Boot Loader",
[BOOT_ENTRY_LOADER_AUTO] = "Automatic",
};
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(boot_entry_type, BootEntryType);
static int boot_config_load_and_select(
BootConfig *config,
const char *esp_path,
dev_t esp_devid,
const char *xbootldr_path,
dev_t xbootldr_devid) {
_cleanup_strv_free_ char **efi_entries = NULL;
int r;
/* If XBOOTLDR and ESP actually refer to the same block device, suppress XBOOTLDR, since it would
* find the same entries twice. */
bool same = esp_path && xbootldr_path && devnum_set_and_equal(esp_devid, xbootldr_devid);
r = boot_config_load(config, esp_path, same ? NULL : xbootldr_path);
if (r < 0)
return r;
r = efi_loader_get_entries(&efi_entries);
if (r == -ENOENT || ERRNO_IS_NOT_SUPPORTED(r))
log_debug_errno(r, "Boot loader reported no entries.");
else if (r < 0)
log_warning_errno(r, "Failed to determine entries reported by boot loader, ignoring: %m");
else
(void) boot_config_augment_from_loader(config, efi_entries, /* only_auto= */ false);
return boot_config_select_special_entries(config);
}
static int boot_entry_show(
const BootEntry *e,
bool show_as_default,
bool show_as_selected,
bool show_reported) {
int status = 0;
/* Returns 0 on success, negative on processing error, and positive if something is wrong with the
boot entry itself. */
assert(e);
printf(" type: %s\n",
boot_entry_type_to_string(e->type));
printf(" title: %s%s%s",
ansi_highlight(), boot_entry_title(e), ansi_normal());
if (show_as_default)
printf(" %s(default)%s",
ansi_highlight_green(), ansi_normal());
if (show_as_selected)
printf(" %s(selected)%s",
ansi_highlight_magenta(), ansi_normal());
if (show_reported) {
if (e->type == BOOT_ENTRY_LOADER)
printf(" %s(reported/absent)%s",
ansi_highlight_red(), ansi_normal());
else if (!e->reported_by_loader && e->type != BOOT_ENTRY_LOADER_AUTO)
printf(" %s(not reported/new)%s",
ansi_highlight_green(), ansi_normal());
}
putchar('\n');
if (e->id)
printf(" id: %s\n", e->id);
if (e->path) {
_cleanup_free_ char *link = NULL;
/* Let's urlify the link to make it easy to view in an editor, but only if it is a text
* file. Unified images are binary ELFs, and EFI variables are not pure text either. */
if (e->type == BOOT_ENTRY_CONF)
(void) terminal_urlify_path(e->path, NULL, &link);
printf(" source: %s\n", link ?: e->path);
}
if (e->sort_key)
printf(" sort-key: %s\n", e->sort_key);
if (e->version)
printf(" version: %s\n", e->version);
if (e->machine_id)
printf(" machine-id: %s\n", e->machine_id);
if (e->architecture)
printf(" architecture: %s\n", e->architecture);
if (e->kernel)
boot_entry_file_list("linux", e->root, e->kernel, &status);
STRV_FOREACH(s, e->initrd)
boot_entry_file_list(s == e->initrd ? "initrd" : NULL,
e->root,
*s,
&status);
if (!strv_isempty(e->options)) {
_cleanup_free_ char *t = NULL, *t2 = NULL;
_cleanup_strv_free_ char **ts = NULL;
t = strv_join(e->options, " ");
if (!t)
return log_oom();
ts = strv_split_newlines(t);
if (!ts)
return log_oom();
t2 = strv_join(ts, "\n ");
if (!t2)
return log_oom();
printf(" options: %s\n", t2);
}
if (e->device_tree)
boot_entry_file_list("devicetree", e->root, e->device_tree, &status);
STRV_FOREACH(s, e->device_tree_overlay)
boot_entry_file_list(s == e->device_tree_overlay ? "devicetree-overlay" : NULL,
e->root,
*s,
&status);
return -status;
}
static int status_entries(
const BootConfig *config,
const char *esp_path,
sd_id128_t esp_partition_uuid,
const char *xbootldr_path,
sd_id128_t xbootldr_partition_uuid) {
sd_id128_t dollar_boot_partition_uuid;
const char *dollar_boot_path;
int r;
assert(config);
assert(esp_path || xbootldr_path);
if (xbootldr_path) {
dollar_boot_path = xbootldr_path;
dollar_boot_partition_uuid = xbootldr_partition_uuid;
} else {
dollar_boot_path = esp_path;
dollar_boot_partition_uuid = esp_partition_uuid;
}
printf("Boot Loader Entries:\n"
" $BOOT: %s", dollar_boot_path);
if (!sd_id128_is_null(dollar_boot_partition_uuid))
printf(" (/dev/disk/by-partuuid/" SD_ID128_UUID_FORMAT_STR ")",
SD_ID128_FORMAT_VAL(dollar_boot_partition_uuid));
printf("\n\n");
if (config->default_entry < 0)
printf("%zu entries, no entry could be determined as default.\n", config->n_entries);
else {
printf("Default Boot Loader Entry:\n");
r = boot_entry_show(
boot_config_default_entry(config),
/* show_as_default= */ false,
/* show_as_selected= */ false,
/* show_discovered= */ false);
if (r > 0)
/* < 0 is already logged by the function itself, let's just emit an extra warning if
the default entry is broken */
printf("\nWARNING: default boot entry is broken\n");
}
return 0;
}
static int compare_product(const char *a, const char *b) {
size_t x, y;
assert(a);
assert(b);
x = strcspn(a, " ");
y = strcspn(b, " ");
if (x != y)
return x < y ? -1 : x > y ? 1 : 0;
return strncmp(a, b, x);
}
static int compare_version(const char *a, const char *b) {
assert(a);
assert(b);
a += strcspn(a, " ");
a += strspn(a, " ");
b += strcspn(b, " ");
b += strspn(b, " ");
return strverscmp_improved(a, b);
}
static int version_check(int fd_from, const char *from, int fd_to, const char *to) {
_cleanup_free_ char *a = NULL, *b = NULL;
int r;
assert(fd_from >= 0);
assert(from);
assert(fd_to >= 0);
assert(to);
r = get_file_version(fd_from, &a);
if (r < 0)
return r;
if (r == 0)
return log_notice_errno(SYNTHETIC_ERRNO(EREMOTE),
"Source file \"%s\" does not carry version information!",
from);
r = get_file_version(fd_to, &b);
if (r < 0)
return r;
if (r == 0 || compare_product(a, b) != 0)
return log_notice_errno(SYNTHETIC_ERRNO(EREMOTE),
"Skipping \"%s\", since it's owned by another boot loader.",
to);
r = compare_version(a, b);
if (r < 0)
return log_warning_errno(SYNTHETIC_ERRNO(ESTALE), "Skipping \"%s\", since newer boot loader version in place already.", to);
else if (r == 0)
return log_info_errno(SYNTHETIC_ERRNO(ESTALE), "Skipping \"%s\", since same boot loader version in place already.", to);
return 0;
}
static int copy_file_with_version_check(const char *from, const char *to, bool force) {
_cleanup_close_ int fd_from = -1, fd_to = -1;
_cleanup_free_ char *t = NULL;
int r;
fd_from = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd_from < 0)
return log_error_errno(errno, "Failed to open \"%s\" for reading: %m", from);
if (!force) {
fd_to = open(to, O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd_to < 0) {
if (errno != ENOENT)
return log_error_errno(errno, "Failed to open \"%s\" for reading: %m", to);
} else {
r = version_check(fd_from, from, fd_to, to);
if (r < 0)
return r;
if (lseek(fd_from, 0, SEEK_SET) == (off_t) -1)
return log_error_errno(errno, "Failed to seek in \"%s\": %m", from);
fd_to = safe_close(fd_to);
}
}
r = tempfn_random(to, NULL, &t);
if (r < 0)
return log_oom();
RUN_WITH_UMASK(0000) {
fd_to = open(t, O_WRONLY|O_CREAT|O_CLOEXEC|O_EXCL|O_NOFOLLOW, 0644);
if (fd_to < 0)
return log_error_errno(errno, "Failed to open \"%s\" for writing: %m", t);
}
r = copy_bytes(fd_from, fd_to, UINT64_MAX, COPY_REFLINK);
if (r < 0) {
(void) unlink(t);
return log_error_errno(r, "Failed to copy data from \"%s\" to \"%s\": %m", from, t);
}
(void) copy_times(fd_from, fd_to, 0);
r = fsync_full(fd_to);
if (r < 0) {
(void) unlink_noerrno(t);
return log_error_errno(r, "Failed to copy data from \"%s\" to \"%s\": %m", from, t);
}
if (renameat(AT_FDCWD, t, AT_FDCWD, to) < 0) {
(void) unlink_noerrno(t);
return log_error_errno(errno, "Failed to rename \"%s\" to \"%s\": %m", t, to);
}
log_info("Copied \"%s\" to \"%s\".", from, to);
return 0;
}
static int mkdir_one(const char *prefix, const char *suffix) {
_cleanup_free_ char *p = NULL;
p = path_join(prefix, suffix);
if (mkdir(p, 0700) < 0) {
if (errno != EEXIST)
return log_error_errno(errno, "Failed to create \"%s\": %m", p);
} else
log_info("Created \"%s\".", p);
return 0;
}
static const char *const esp_subdirs[] = {
/* The directories to place in the ESP */
"EFI",
"EFI/systemd",
"EFI/BOOT",
"loader",
NULL
};
static const char *const dollar_boot_subdirs[] = {
/* The directories to place in the XBOOTLDR partition or the ESP, depending what exists */
"loader",
"loader/entries", /* Type #1 entries */
"EFI",
"EFI/Linux", /* Type #2 entries */
NULL
};
static int create_subdirs(const char *root, const char * const *subdirs) {
int r;
STRV_FOREACH(i, subdirs) {
r = mkdir_one(root, *i);
if (r < 0)
return r;
}
return 0;
}
static int copy_one_file(const char *esp_path, const char *name, bool force) {
const char *e;
char *p, *q, *dest_name, *s;
int r;
dest_name = strdupa_safe(name);
s = endswith_no_case(dest_name, ".signed");
if (s)
*s = 0;
p = strjoina(BOOTLIBDIR "/", name);
q = strjoina(esp_path, "/EFI/systemd/", dest_name);
r = copy_file_with_version_check(p, q, force);
e = startswith(dest_name, "systemd-boot");
if (e) {
int k;
char *v;
/* Create the EFI default boot loader name (specified for removable devices) */
v = strjoina(esp_path, "/EFI/BOOT/BOOT", e);
ascii_strupper(strrchr(v, '/') + 1);
k = copy_file_with_version_check(p, v, force);
if (k < 0 && r == 0)
r = k;
}
return r;
}
static int install_binaries(const char *esp_path, bool force) {
_cleanup_closedir_ DIR *d = NULL;
int r = 0;
d = opendir(BOOTLIBDIR);
if (!d)
return log_error_errno(errno, "Failed to open \""BOOTLIBDIR"\": %m");
FOREACH_DIRENT(de, d, return log_error_errno(errno, "Failed to read \""BOOTLIBDIR"\": %m")) {
int k;
if (!endswith_no_case(de->d_name, ".efi") && !endswith_no_case(de->d_name, ".efi.signed"))
continue;
/* skip the .efi file, if there's a .signed version of it */
if (endswith_no_case(de->d_name, ".efi")) {
_cleanup_free_ const char *s = strjoin(de->d_name, ".signed");
if (!s)
return log_oom();
if (faccessat(dirfd(d), s, F_OK, 0) >= 0)
continue;
}
k = copy_one_file(esp_path, de->d_name, force);
/* Don't propagate an error code if no update necessary, installed version already equal or
* newer version, or other boot loader in place. */
if (arg_graceful && IN_SET(k, -ESTALE, -EREMOTE))
continue;
if (k < 0 && r == 0)
r = k;
}
return r;
}
static bool same_entry(uint16_t id, sd_id128_t uuid, const char *path) {
_cleanup_free_ char *opath = NULL;
sd_id128_t ouuid;
int r;
r = efi_get_boot_option(id, NULL, &ouuid, &opath, NULL);
if (r < 0)
return false;
if (!sd_id128_equal(uuid, ouuid))