#include <unistd.h>

#include "bootspec.h"

#include "bootspec-fundamental.h"

#include "conf-files.h"

#include "dirent-util.h"

#include "efi-loader.h"

#include "env-file.h"

#include "fd-util.h"

#include "fileio.h"

#include "find-esp.h"

#include "path-util.h"

#include "pe-header.h"

#include "recurse-dir.h"

#include "sort-util.h"

#include "stat-util.h"

#include "strv.h"

#include "unaligned.h"

static void boot_entry_free(BootEntry *entry) {

assert(entry);

free(entry->id);

free(entry->id_old);

free(entry->path);

free(entry->root);

free(entry->title);

free(entry->show_title);

free(entry->sort_key);

free(entry->version);

free(entry->machine_id);

free(entry->architecture);

strv_free(entry->options);

free(entry->kernel);

free(entry->efi);

strv_free(entry->initrd);

free(entry->device_tree);

strv_free(entry->device_tree_overlay);

}

static int boot_entry_load_type1(

BootEntry *entry) {

_cleanup_(boot_entry_free) BootEntry tmp = {

.type = BOOT_ENTRY_CONF,

};

unsigned line = 1;

char *c;

int r;

assert(f);

assert(root);

assert(dir);

assert(id);

assert(entry);

/* Loads a Type #1 boot menu entry from the specified FILE* object */

if (!efi_loader_entry_name_valid(id))

return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid loader entry name: %s", id);

c = endswith_no_case(id, ".conf");

if (!c)

return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid loader entry file suffix: %s", id);

tmp.id = strdup(id);

if (!tmp.id)

return log_oom();

tmp.id_old = strndup(id, c - id); /* Without .conf suffix */

if (!tmp.id_old)

return log_oom();

tmp.path = path_join(dir, id);

if (!tmp.path)

return log_oom();

tmp.root = strdup(root);

if (!tmp.root)

return log_oom();

for (;;) {

_cleanup_free_ char *buf = NULL, *field = NULL;

const char *p;

r = read_line(f, LONG_LINE_MAX, &buf);

if (r == 0)

break;

if (r == -ENOBUFS)

return log_error_errno(r, "%s:%u: Line too long", tmp.path, line);

if (r < 0)

return log_error_errno(r, "%s:%u: Error while reading: %m", tmp.path, line);

line++;

if (IN_SET(*strstrip(buf), '#', '\0'))

continue;

p = buf;

r = extract_first_word(&p, &field, " \t", 0);

if (r < 0) {

log_error_errno(r, "Failed to parse config file %s line %u: %m", tmp.path, line);

continue;

}

if (r == 0) {

log_warning("%s:%u: Bad syntax", tmp.path, line);

continue;

}

if (streq(field, "title"))

r = free_and_strdup(&tmp.title, p);

else if (streq(field, "sort-key"))

r = free_and_strdup(&tmp.sort_key, p);

else if (streq(field, "version"))

r = free_and_strdup(&tmp.version, p);

else if (streq(field, "machine-id"))

r = free_and_strdup(&tmp.machine_id, p);

else if (streq(field, "architecture"))

r = free_and_strdup(&tmp.architecture, p);

else if (streq(field, "options"))

r = strv_extend(&tmp.options, p);

else if (streq(field, "linux"))

r = free_and_strdup(&tmp.kernel, p);

else if (streq(field, "efi"))

r = free_and_strdup(&tmp.efi, p);

else if (streq(field, "initrd"))

r = strv_extend(&tmp.initrd, p);

else if (streq(field, "devicetree"))

r = free_and_strdup(&tmp.device_tree, p);

else if (streq(field, "devicetree-overlay")) {

_cleanup_strv_free_ char **l = NULL;

l = strv_split(p, NULL);

if (!l)

return log_oom();

r = strv_extend_strv(&tmp.device_tree_overlay, l, false);

} else {

log_notice("%s:%u: Unknown line \"%s\", ignoring.", tmp.path, line, field);

continue;

}

if (r < 0)

return log_error_errno(r, "%s:%u: Error while reading: %m", tmp.path, line);

}

*entry = tmp;

tmp = (BootEntry) {};

return 0;

}

void boot_config_free(BootConfig *config) {

assert(config);

free(config->default_pattern);

free(config->timeout);

free(config->editor);

free(config->auto_entries);

free(config->auto_firmware);

free(config->console_mode);

free(config->random_seed_mode);

free(config->beep);

free(config->entry_oneshot);

free(config->entry_default);

free(config->entry_selected);

for (size_t i = 0; i < config->n_entries; i++)

boot_entry_free(config->entries + i);

free(config->entries);

set_free(config->inodes_seen);

}

static int boot_loader_read_conf(const char *path, BootConfig *config) {

_cleanup_fclose_ FILE *f = NULL;

unsigned line = 1;

int r;

assert(path);

assert(config);

f = fopen(path, "re");

if (!f) {

if (errno == ENOENT)

return 0;

return log_error_errno(errno, "Failed to open \"%s\": %m", path);

}

for (;;) {

_cleanup_free_ char *buf = NULL, *field = NULL;

const char *p;

r = read_line(f, LONG_LINE_MAX, &buf);

if (r == 0)

break;

if (r == -ENOBUFS)

return log_error_errno(r, "%s:%u: Line too long", path, line);

if (r < 0)

return log_error_errno(r, "%s:%u: Error while reading: %m", path, line);

line++;

if (IN_SET(*strstrip(buf), '#', '\0'))

continue;

p = buf;

r = extract_first_word(&p, &field, " \t", 0);

if (r < 0) {

log_error_errno(r, "Failed to parse config file %s line %u: %m", path, line);

continue;

}

if (r == 0) {

log_warning("%s:%u: Bad syntax", path, line);

continue;

}

if (streq(field, "default"))

r = free_and_strdup(&config->default_pattern, p);

else if (streq(field, "timeout"))

r = free_and_strdup(&config->timeout, p);

else if (streq(field, "editor"))

r = free_and_strdup(&config->editor, p);

else if (streq(field, "auto-entries"))

r = free_and_strdup(&config->auto_entries, p);

else if (streq(field, "auto-firmware"))

r = free_and_strdup(&config->auto_firmware, p);

else if (streq(field, "console-mode"))

r = free_and_strdup(&config->console_mode, p);

else if (streq(field, "random-seed-mode"))

r = free_and_strdup(&config->random_seed_mode, p);

else if (streq(field, "beep"))

r = free_and_strdup(&config->beep, p);

else {

log_notice("%s:%u: Unknown line \"%s\", ignoring.", path, line, field);

continue;

}

if (r < 0)

return log_error_errno(r, "%s:%u: Error while reading: %m", path, line);

}

return 1;

}

static int boot_entry_compare(const BootEntry *a, const BootEntry *b) {

int r;

assert(a);

assert(b);

r = CMP(!a->sort_key, !b->sort_key);

if (r != 0)

return r;

if (a->sort_key && b->sort_key) {

r = strcmp(a->sort_key, b->sort_key);

if (r != 0)

return r;

r = strcmp_ptr(a->machine_id, b->machine_id);

if (r != 0)

return r;

r = -strverscmp_improved(a->version, b->version);

if (r != 0)

return r;

}

return -strverscmp_improved(a->id, b->id);

}

static void inode_hash_func(const struct stat *q, struct siphash *state) {

siphash24_compress(&q->st_dev, sizeof(q->st_dev), state);

siphash24_compress(&q->st_ino, sizeof(q->st_ino), state);

}

static int inode_compare_func(const struct stat *a, const struct stat *b) {

int r;

r = CMP(a->st_dev, b->st_dev);

if (r != 0)

return r;

return CMP(a->st_ino, b->st_ino);

}

DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(inode_hash_ops, struct stat, inode_hash_func, inode_compare_func, free);

static int config_check_inode_relevant_and_unseen(BootConfig *config, int fd, const char *fname) {

_cleanup_free_ char *d = NULL;

struct stat st;

assert(config);

assert(fd >= 0);

assert(fname);

/* So, here's the thing: because of the mess around /efi/ vs. /boot/ vs. /boot/efi/ it might be that

if (fstat(fd, &st) < 0)

return log_error_errno(errno, "Failed to stat('%s'): %m", fname);

if (!S_ISREG(st.st_mode)) {

log_debug("File '%s' is not a reguar file, ignoring.", fname);

return false;

}

if (set_contains(config->inodes_seen, &st)) {

log_debug("Inode '%s' already seen before, ignoring.", fname);

return false;

}

d = memdup(&st, sizeof(st));

if (!d)

return log_oom();

if (set_ensure_put(&config->inodes_seen, &inode_hash_ops, d) < 0)

return log_oom();

TAKE_PTR(d);

return true;

}

static int boot_entries_find_type1(

BootConfig *config,

const char *root,

const char *dir) {

_cleanup_free_ DirectoryEntries *dentries = NULL;

_cleanup_close_ int dir_fd = -1;

int r;

assert(config);

assert(root);

assert(dir);

dir_fd = open(dir, O_DIRECTORY|O_CLOEXEC);

if (dir_fd < 0) {

if (errno == ENOENT)

return 0;

return log_error_errno(errno, "Failed to open '%s': %m", dir);

}

r = readdir_all(dir_fd, RECURSE_DIR_IGNORE_DOT, &dentries);

if (r < 0)

return log_error_errno(r, "Failed to read directory '%s': %m", dir);

for (size_t i = 0; i < dentries->n_entries; i++) {

const struct dirent *de = dentries->entries[i];

_cleanup_fclose_ FILE *f = NULL;

if (!dirent_is_file(de))

continue;

if (!endswith_no_case(de->d_name, ".conf"))

continue;

r = xfopenat(dir_fd, de->d_name, "re", 0, &f);

if (r < 0) {

log_warning_errno(r, "Failed to open %s/%s, ignoring: %m", dir, de->d_name);

continue;

}

r = config_check_inode_relevant_and_unseen(config, fileno(f), de->d_name);

if (r < 0)

return r;

if (r == 0) /* inode already seen or otherwise not relevant */

continue;

if (!GREEDY_REALLOC0(config->entries, config->n_entries + 1))

return log_oom();

r = boot_entry_load_type1(f, root, dir, de->d_name, config->entries + config->n_entries);

if (r < 0)

continue;

config->n_entries++;

}

return 0;

}

static int boot_entry_load_unified(

BootEntry *ret) {

_cleanup_free_ char *os_pretty_name = NULL, *os_image_id = NULL, *os_name = NULL, *os_id = NULL,

*os_image_version = NULL, *os_version = NULL, *os_version_id = NULL, *os_build_id = NULL;

_cleanup_(boot_entry_free) BootEntry tmp = {

.type = BOOT_ENTRY_UNIFIED,

};

const char *k, *good_name, *good_version, *good_sort_key;

_cleanup_fclose_ FILE *f = NULL;

int r;

assert(root);

assert(path);

assert(osrelease);

k = path_startswith(path, root);

if (!k)

return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path is not below root: %s", path);

f = fmemopen_unlocked((void*) osrelease, strlen(osrelease), "r");

if (!f)

return log_error_errno(errno, "Failed to open os-release buffer: %m");

r = parse_env_file(f, "os-release",

"PRETTY_NAME", &os_pretty_name,

"IMAGE_ID", &os_image_id,

"NAME", &os_name,

"ID", &os_id,

"IMAGE_VERSION", &os_image_version,

"VERSION", &os_version,

"VERSION_ID", &os_version_id,

"BUILD_ID", &os_build_id);

if (r < 0)

return log_error_errno(r, "Failed to parse os-release data from unified kernel image %s: %m", path);

if (!bootspec_pick_name_version_sort_key(

os_pretty_name,

os_image_id,

os_name,

os_id,

os_image_version,

os_version,

os_version_id,

os_build_id,

&good_name,

&good_version,

&good_sort_key))

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Missing fields in os-release data from unified kernel image %s, refusing.", path);

r = path_extract_filename(path, &tmp.id);

if (r < 0)

return log_error_errno(r, "Failed to extract file name from '%s': %m", path);

if (!efi_loader_entry_name_valid(tmp.id))

return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid loader entry name: %s", tmp.id);

if (os_id && os_version_id) {

tmp.id_old = strjoin(os_id, "-", os_version_id);

if (!tmp.id_old)

return log_oom();

}

tmp.path = strdup(path);

if (!tmp.path)

return log_oom();

tmp.root = strdup(root);

if (!tmp.root)

return log_oom();

tmp.kernel = strdup(skip_leading_chars(k, "/"));

if (!tmp.kernel)

return log_oom();

tmp.options = strv_new(skip_leading_chars(cmdline, WHITESPACE));

if (!tmp.options)

return log_oom();

delete_trailing_chars(tmp.options[0], WHITESPACE);

tmp.title = strdup(good_name);

if (!tmp.title)

return log_oom();

tmp.sort_key = strdup(good_sort_key);

if (!tmp.sort_key)

return log_oom();

tmp.version = strdup(good_version);

if (!tmp.version)

return log_oom();

*ret = tmp;

tmp = (BootEntry) {};

return 0;

}

#define PE_SECTION_SIZE_MAX (4U*1024U*1024U)

static int find_sections(

int fd,

char **ret_osrelease,

char **ret_cmdline) {

_cleanup_free_ struct PeSectionHeader *sections = NULL;

_cleanup_free_ char *osrelease = NULL, *cmdline = NULL;

ssize_t n;

struct DosFileHeader dos;

n = pread(fd, &dos, sizeof(dos), 0);

if (n < 0)

return log_error_errno(errno, "Failed read DOS header: %m");

if (n != sizeof(dos))

return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading DOS header, refusing.");

if (dos.Magic[0] != 'M' || dos.Magic[1] != 'Z')

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "DOS executable magic missing, refusing.");

uint64_t start = unaligned_read_le32(&dos.ExeHeader);

struct PeHeader pe;

n = pread(fd, &pe, sizeof(pe), start);

if (n < 0)

return log_error_errno(errno, "Failed to read PE header: %m");

if (n != sizeof(pe))

return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading PE header, refusing.");

if (pe.Magic[0] != 'P' || pe.Magic[1] != 'E' || pe.Magic[2] != 0 || pe.Magic[3] != 0)

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "PE executable magic missing, refusing.");

size_t n_sections = unaligned_read_le16(&pe.FileHeader.NumberOfSections);

if (n_sections > 96)

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "PE header has too many sections, refusing.");

sections = new(struct PeSectionHeader, n_sections);

if (!sections)

return log_oom();

n = pread(fd, sections,

n_sections * sizeof(struct PeSectionHeader),

start + sizeof(pe) + unaligned_read_le16(&pe.FileHeader.SizeOfOptionalHeader));

if (n < 0)

return log_error_errno(errno, "Failed to read section data: %m");

if ((size_t) n != n_sections * sizeof(struct PeSectionHeader))

return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading sections, refusing.");

for (size_t i = 0; i < n_sections; i++) {

_cleanup_free_ char *k = NULL;

uint32_t offset, size;

char **b;

if (strneq((char*) sections[i].Name, ".osrel", sizeof(sections[i].Name)))

b = &osrelease;

else if (strneq((char*) sections[i].Name, ".cmdline", sizeof(sections[i].Name)))

b = &cmdline;

else

continue;

if (*b)

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Duplicate section %s, refusing.", sections[i].Name);

offset = unaligned_read_le32(&sections[i].PointerToRawData);

size = unaligned_read_le32(&sections[i].VirtualSize);

if (size > PE_SECTION_SIZE_MAX)

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Section %s too large, refusing.", sections[i].Name);

k = new(char, size+1);

if (!k)

return log_oom();

n = pread(fd, k, size, offset);

if (n < 0)

return log_error_errno(errno, "Failed to read section payload: %m");

if ((size_t) n != size)

return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading section payload, refusing:");

/* Allow one trailing NUL byte, but nothing more. */

if (size > 0 && memchr(k, 0, size - 1))

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Section contains embedded NUL byte: %m");

k[size] = 0;

*b = TAKE_PTR(k);

}

if (!osrelease)

return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Image lacks .osrel section, refusing.");

if (ret_osrelease)

*ret_osrelease = TAKE_PTR(osrelease);

if (ret_cmdline)

*ret_cmdline = TAKE_PTR(cmdline);

return 0;

}

static int boot_entries_find_unified(

BootConfig *config,

const char *root,

const char *dir) {

_cleanup_(closedirp) DIR *d = NULL;

int r;

assert(config);

assert(dir);

d = opendir(dir);

if (!d) {

if (errno == ENOENT)

return 0;

return log_error_errno(errno, "Failed to open %s: %m", dir);

}

FOREACH_DIRENT(de, d, return log_error_errno(errno, "Failed to read %s: %m", dir)) {

_cleanup_free_ char *j = NULL, *osrelease = NULL, *cmdline = NULL;

_cleanup_close_ int fd = -1;

if (!dirent_is_file(de))

continue;

if (!endswith_no_case(de->d_name, ".efi"))

continue;

if (!GREEDY_REALLOC0(config->entries, config->n_entries + 1))

return log_oom();

fd = openat(dirfd(d), de->d_name, O_RDONLY|O_CLOEXEC|O_NONBLOCK);

if (fd < 0) {

log_warning_errno(errno, "Failed to open %s/%s, ignoring: %m", dir, de->d_name);

continue;

}

r = config_check_inode_relevant_and_unseen(config, fd, de->d_name);

if (r < 0)

return r;

if (r == 0) /* inode already seen or otherwise not relevant */

continue;

if (find_sections(fd, &osrelease, &cmdline) < 0)

continue;

j = path_join(dir, de->d_name);

if (!j)

return log_oom();

r = boot_entry_load_unified(root, j, osrelease, cmdline, config->entries + config->n_entries);

if (r < 0)

continue;

config->n_entries++;

}

return 0;

}

static bool find_nonunique(const BootEntry *entries, size_t n_entries, bool arr[]) {

bool non_unique = false;

assert(entries || n_entries == 0);

assert(arr || n_entries == 0);

for (size_t i = 0; i < n_entries; i++)

arr[i] = false;

for (size_t i = 0; i < n_entries; i++)

for (size_t j = 0; j < n_entries; j++)

if (i != j && streq(boot_entry_title(entries + i),

boot_entry_title(entries + j)))

non_unique = arr[i] = arr[j] = true;

return non_unique;

}

static int boot_entries_uniquify(BootEntry *entries, size_t n_entries) {

_cleanup_free_ bool *arr = NULL;

char *s;

assert(entries || n_entries == 0);

if (n_entries == 0)

return 0;

arr = new(bool, n_entries);

if (!arr)

return -ENOMEM;

/* Find _all_ non-unique titles */

if (!find_nonunique(entries, n_entries, arr))

return 0;

/* Add version to non-unique titles */

for (size_t i = 0; i < n_entries; i++)

if (arr[i] && entries[i].version) {

if (asprintf(&s, "%s (%s)", boot_entry_title(entries + i), entries[i].version) < 0)

return -ENOMEM;

free_and_replace(entries[i].show_title, s);

}

if (!find_nonunique(entries, n_entries, arr))

return 0;

/* Add machine-id to non-unique titles */

for (size_t i = 0; i < n_entries; i++)

if (arr[i] && entries[i].machine_id) {

if (asprintf(&s, "%s (%s)", boot_entry_title(entries + i), entries[i].machine_id) < 0)

return -ENOMEM;

free_and_replace(entries[i].show_title, s);

}

if (!find_nonunique(entries, n_entries, arr))

return 0;

/* Add file name to non-unique titles */

for (size_t i = 0; i < n_entries; i++)

if (arr[i]) {

if (asprintf(&s, "%s (%s)", boot_entry_title(entries + i), entries[i].id) < 0)

return -ENOMEM;

free_and_replace(entries[i].show_title, s);

}

return 0;

}

static int boot_config_find(const BootConfig *config, const char *id) {

assert(config);

if (!id)

return -1;

for (size_t i = 0; i < config->n_entries; i++)

if (fnmatch(id, config->entries[i].id, FNM_CASEFOLD) == 0)

return i;

return -1;

}

static int boot_entries_select_default(const BootConfig *config) {

int i;

assert(config);

assert(config->entries || config->n_entries == 0);

if (config->n_entries == 0) {

log_debug("Found no default boot entry :(");

return -1; /* -1 means "no default" */

}

if (config->entry_oneshot) {

i = boot_config_find(config, config->entry_oneshot);

if (i >= 0) {

log_debug("Found default: id \"%s\" is matched by LoaderEntryOneShot",

config->entries[i].id);

return i;

}

}

if (config->entry_default) {

i = boot_config_find(config, config->entry_default);

if (i >= 0) {

log_debug("Found default: id \"%s\" is matched by LoaderEntryDefault",

config->entries[i].id);

return i;

}

}

if (config->default_pattern) {

i = boot_config_find(config, config->default_pattern);

if (i >= 0) {

log_debug("Found default: id \"%s\" is matched by pattern \"%s\"",

config->entries[i].id, config->default_pattern);

return i;

}

}

log_debug("Found default: first entry \"%s\"", config->entries[0].id);

return 0;

}

static int boot_entries_select_selected(const BootConfig *config) {

assert(config);

assert(config->entries || config->n_entries == 0);

if (!config->entry_selected || config->n_entries == 0)

return -1;

return boot_config_find(config, config->entry_selected);

}

static int boot_load_efi_entry_pointers(BootConfig *config) {

int r;

assert(config);

if (!is_efi_boot())

return 0;

/* Loads the three "pointers" to boot loader entries from their EFI variables */

r = efi_get_variable_string(EFI_LOADER_VARIABLE(LoaderEntryOneShot), &config->entry_oneshot);

if (r == -ENOMEM)

return log_oom();

if (r < 0 && !IN_SET(r, -ENOENT, -ENODATA))

log_warning_errno(r, "Failed to read EFI variable \"LoaderEntryOneShot\", ignoring: %m");

r = efi_get_variable_string(EFI_LOADER_VARIABLE(LoaderEntryDefault), &config->entry_default);

if (r == -ENOMEM)

return log_oom();

if (r < 0 && !IN_SET(r, -ENOENT, -ENODATA))

log_warning_errno(r, "Failed to read EFI variable \"LoaderEntryDefault\", ignoring: %m");

r = efi_get_variable_string(EFI_LOADER_VARIABLE(LoaderEntrySelected), &config->entry_selected);

if (r == -ENOMEM)

return log_oom();

if (r < 0 && !IN_SET(r, -ENOENT, -ENODATA))

log_warning_errno(r, "Failed to read EFI variable \"LoaderEntrySelected\", ignoring: %m");

return 1;

}

int boot_config_select_special_entries(BootConfig *config) {

int r;

assert(config);

r = boot_load_efi_entry_pointers(config);

if (r < 0)

return r;

config->default_entry = boot_entries_select_default(config);

config->selected_entry = boot_entries_select_selected(config);

return 0;

}

int boot_config_load(

BootConfig *config,

const char *esp_path,

const char *xbootldr_path) {

const char *p;

int r;

assert(config);

if (esp_path) {

p = strjoina(esp_path, "/loader/loader.conf");

r = boot_loader_read_conf(p, config);

if (r < 0)

return r;

p = strjoina(esp_path, "/loader/entries");

r = boot_entries_find_type1(config, esp_path, p);

if (r < 0)

return r;

p = strjoina(esp_path, "/EFI/Linux/");

r = boot_entries_find_unified(config, esp_path, p);

if (r < 0)

return r;

}

if (xbootldr_path) {

p = strjoina(xbootldr_path, "/loader/entries");

r = boot_entries_find_type1(config, xbootldr_path, p);

if (r < 0)

return r;

p = strjoina(xbootldr_path, "/EFI/Linux/");

r = boot_entries_find_unified(config, xbootldr_path, p);

if (r < 0)

return r;

}

typesafe_qsort(config->entries, config->n_entries, boot_entry_compare);

r = boot_entries_uniquify(config->entries, config->n_entries);

if (r < 0)

return log_error_errno(r, "Failed to uniquify boot entries: %m");

return 0;

}

int boot_config_load_auto(

BootConfig *config,

const char *override_esp_path,

const char *override_xbootldr_path) {

_cleanup_free_ char *esp_where = NULL, *xbootldr_where = NULL;

dev_t esp_devid = 0, xbootldr_devid = 0;

int r;

assert(config);

/* This function is similar to boot_entries_load_config(), however we automatically search for the

if (!override_esp_path && !override_xbootldr_path) {

if (access("/run/boot-loader-entries/", F_OK) >= 0)

return boot_config_load(config, "/run/boot-loader-entries/", NULL);

if (errno != ENOENT)

return log_error_errno(errno,

"Failed to determine whether /run/boot-loader-entries/ exists: %m");

}

r = find_esp_and_warn(override_esp_path, /* unprivileged_mode= */ false, &esp_where, NULL, NULL, NULL, NULL, &esp_devid);

if (r < 0) /* we don't log about ENOKEY here, but propagate it, leaving it to the caller to log */

return r;

r = find_xbootldr_and_warn(override_xbootldr_path, /* unprivileged_mode= */ false, &xbootldr_where, NULL, &xbootldr_devid);

if (r < 0 && r != -ENOKEY)

return r; /* It's fine if the XBOOTLDR partition doesn't exist, hence we ignore ENOKEY here */

/* If both paths actually refer to the same inode, suppress the xbootldr path */

if (esp_where && xbootldr_where && devid_set_and_equal(esp_devid, xbootldr_devid))

xbootldr_where = mfree(xbootldr_where);

return boot_config_load(config, esp_where, xbootldr_where);

}

int boot_config_augment_from_loader(

BootConfig *config,

char **found_by_loader,

bool only_auto) {

static const char *const title_table[] = {

/* Pretty names for a few well-known automatically discovered entries. */

"auto-osx", "macOS",

"auto-windows", "Windows Boot Manager",

"auto-efi-shell", "EFI Shell",

"auto-efi-default", "EFI Default Loader",

"auto-reboot-to-firmware-setup", "Reboot Into Firmware Interface",

};

assert(config);

/* Let's add the entries discovered by the boot loader to the end of our list, unless they are

STRV_FOREACH(i, found_by_loader) {

BootEntry *existing;

_cleanup_free_ char *c = NULL, *t = NULL, *p = NULL;

existing = boot_config_find_entry(config, *i);

if (existing) {

existing->reported_by_loader = true;

continue;

}

if (only_auto && !startswith(*i, "auto-"))

continue;

c = strdup(*i);

if (!c)

return log_oom();

STRV_FOREACH_PAIR(a, b, (char**) title_table)

if (streq(*a, *i)) {

t = strdup(*b);

if (!t)

return log_oom();

break;

}

p = strdup(EFIVAR_PATH(EFI_LOADER_VARIABLE(LoaderEntries)));

if (!p)

return log_oom();

if (!GREEDY_REALLOC0(config->entries, config->n_entries + 1))

return log_oom();

config->entries[config->n_entries++] = (BootEntry) {

.type = startswith(*i, "auto-") ? BOOT_ENTRY_LOADER_AUTO : BOOT_ENTRY_LOADER,

.id = TAKE_PTR(c),

.title = TAKE_PTR(t),

.path = TAKE_PTR(p),

.reported_by_loader = true,

};

}

return 0;

}

BootEntry* boot_config_find_entry(BootConfig *config, const char *id) {

assert(config);

assert(id);

for (size_t j = 0; j < config->n_entries; j++)

if (streq_ptr(config->entries[j].id, id) ||

streq_ptr(config->entries[j].id_old, id))

return config->entries + j;

return NULL;

}