| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <ftw.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 "dirent-util.h" |
| #include "efi-loader.h" |
| #include "efivars.h" |
| #include "env-util.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "fs-util.h" |
| #include "locale-util.h" |
| #include "main-func.h" |
| #include "mkdir.h" |
| #include "pager.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-util.h" |
| #include "strv.h" |
| #include "terminal-util.h" |
| #include "tmpfile-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_DESTRUCTOR_REGISTER(arg_esp_path, freep); |
| STATIC_DESTRUCTOR_REGISTER(arg_xbootldr_path, 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, |
| uint32_t *ret_part, |
| uint64_t *ret_pstart, |
| uint64_t *ret_psize, |
| sd_id128_t *ret_uuid) { |
| |
| 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); |
| if (r == -ENOKEY) |
| 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 1; |
| } |
| |
| static int acquire_xbootldr(bool unprivileged_mode, sd_id128_t *ret_uuid) { |
| char *np; |
| int r; |
| |
| r = find_xbootldr_and_warn(arg_xbootldr_path, unprivileged_mode, &np, ret_uuid); |
| if (r == -ENOKEY) { |
| log_debug_errno(r, "Didn't find an XBOOTLDR partition, using the ESP as $BOOT."); |
| if (ret_uuid) |
| *ret_uuid = SD_ID128_NULL; |
| arg_xbootldr_path = mfree(arg_xbootldr_path); |
| 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; |
| } |
| |
| /* 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) { |
| *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 = memmem(buf, st.st_size - 8, "#### LoaderInfo: ", 17); |
| if (!s) |
| goto finish; |
| s += 17; |
| |
| e = memmem(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; |
| struct dirent *de; |
| 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, i; |
| |
| 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 (i = 0; i < n_order; i++) |
| print_efi_option(order[i], true); |
| |
| /* print remaining entries */ |
| for (i = 0; i < n_options; i++) { |
| int j; |
| |
| for (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; |
| |
| path = path_join(root, p); |
| if (!path) |
| return log_oom(); |
| |
| if (access(path, F_OK) < 0) |
| return -errno; |
| |
| return 0; |
| } |
| |
| 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 int boot_entry_show(const BootEntry *e, bool show_as_default) { |
| 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(" title: %s%s%s" "%s%s%s\n", |
| ansi_highlight(), boot_entry_title(e), ansi_normal(), |
| ansi_highlight_green(), show_as_default ? " (default)" : "", ansi_normal()); |
| |
| 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->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); |
| |
| char **s; |
| 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); |
| |
| return -status; |
| } |
| |
| static int status_entries( |
| const char *esp_path, |
| sd_id128_t esp_partition_uuid, |
| const char *xbootldr_path, |
| sd_id128_t xbootldr_partition_uuid) { |
| |
| _cleanup_(boot_config_free) BootConfig config = {}; |
| sd_id128_t dollar_boot_partition_uuid; |
| const char *dollar_boot_path; |
| int r; |
| |
| 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"); |
| |
| r = boot_entries_load_config(esp_path, xbootldr_path, &config); |
| if (r < 0) |
| return r; |
| |
| 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(config.entries + config.default_entry, 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(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_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "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(EEXIST), |
| "Skipping \"%s\", since it's owned by another boot loader.", |
| to); |
| |
| if (compare_version(a, b) < 0) |
| return log_warning_errno(SYNTHETIC_ERRNO(ESTALE), "Skipping \"%s\", since a newer boot loader version exists 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_t) -1, 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); |
| |
| if (fsync(fd_to) < 0) { |
| (void) unlink_noerrno(t); |
| return log_error_errno(errno, "Failed to copy data from \"%s\" to \"%s\": %m", from, t); |
| } |
| |
| (void) fsync_directory_of_file(fd_to); |
| |
| 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) { |
| const char *const *i; |
| 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; |
| int r; |
| |
| p = strjoina(BOOTLIBDIR "/", name); |
| q = strjoina(esp_path, "/EFI/systemd/", name); |
| r = copy_file_with_version_check(p, q, force); |
| |
| e = startswith(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) { |
| struct dirent *de; |
| _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")) |
| continue; |
| |
| k = copy_one_file(esp_path, de->d_name, force); |
| 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)) |
| return false; |
| if (!streq_ptr(path, opath)) |
| return false; |
| |
| return true; |
| } |
| |
| static int find_slot(sd_id128_t uuid, const char *path, uint16_t *id) { |
| _cleanup_free_ uint16_t *options = NULL; |
| int n, i; |
| |
| n = efi_get_boot_options(&options); |
| if (n < 0) |
| return n; |
| |
| /* find already existing systemd-boot entry */ |
| for (i = 0; i < n; i++) |
| if (same_entry(options[i], uuid, path)) { |
| *id = options[i]; |
| return 1; |
| } |
| |
| /* find free slot in the sorted BootXXXX variable list */ |
| for (i = 0; i < n; i++) |
| if (i != options[i]) { |
| *id = i; |
| return 1; |
| } |
| |
| /* use the next one */ |
| if (i == 0xffff) |
| return -ENOSPC; |
| *id = i; |
| return 0; |
| } |
| |
| static int insert_into_order(uint16_t slot, bool first) { |
| _cleanup_free_ uint16_t *order = NULL; |
| uint16_t *t; |
| int n, i; |
| |
| n = efi_get_boot_order(&order); |
| if (n <= 0) |
| /* no entry, add us */ |
| return efi_set_boot_order(&slot, 1); |
| |
| /* are we the first and only one? */ |
| if (n == 1 && order[0] == slot) |
| return 0; |
| |
| /* are we already in the boot order? */ |
| for (i = 0; i < n; i++) { |
| if (order[i] != slot) |
| continue; |
| |
| /* we do not require to be the first one, all is fine */ |
| if (!first) |
| return 0; |
| |
| /* move us to the first slot */ |
| memmove(order + 1, order, i * sizeof(uint16_t)); |
| order[0] = slot; |
| return efi_set_boot_order(order, n); |
| } |
| |
| /* extend array */ |
| t = reallocarray(order, n + 1, sizeof(uint16_t)); |
| if (!t) |
| return -ENOMEM; |
| order = t; |
| |
| /* add us to the top or end of the list */ |
| if (first) { |
| memmove(order + 1, order, n * sizeof(uint16_t)); |
| order[0] = slot; |
| } else |
| order[n] = slot; |
| |
| return efi_set_boot_order(order, n + 1); |
| } |
| |
| static int remove_from_order(uint16_t slot) { |
| _cleanup_free_ uint16_t *order = NULL; |
| int n, i; |
| |
| n = efi_get_boot_order(&order); |
| if (n <= 0) |
| return n; |
| |
| for (i = 0; i < n; i++) { |
| if (order[i] != slot) |
| continue; |
| |
| if (i + 1 < n) |
| memmove(order + i, order + i+1, (n - i) * sizeof(uint16_t)); |
| return efi_set_boot_order(order, n - 1); |
| } |
| |
| return 0; |
| } |
| |
| static int install_variables(const char *esp_path, |
| uint32_t part, uint64_t pstart, uint64_t psize, |
| sd_id128_t uuid, const char *path, |
| bool first) { |
| const char *p; |
| uint16_t slot; |
| int r; |
| |
| if (!is_efi_boot()) { |
| log_warning("Not booted with EFI, skipping EFI variable setup."); |
| return 0; |
| } |
| |
| p = prefix_roota(esp_path, path); |
| if (access(p, F_OK) < 0) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Cannot access \"%s\": %m", p); |
| } |
| |
| r = find_slot(uuid, path, &slot); |
| if (r < 0) |
| return log_error_errno(r, |
| r == -ENOENT ? |
| "Failed to access EFI variables. Is the \"efivarfs\" filesystem mounted?" : |
| "Failed to determine current boot order: %m"); |
| |
| if (first || r == 0) { |
| r = efi_add_boot_option(slot, "Linux Boot Manager", |
| part, pstart, psize, |
| uuid, path); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create EFI Boot variable entry: %m"); |
| |
| log_info("Created EFI boot entry \"Linux Boot Manager\"."); |
| } |
| |
| return insert_into_order(slot, first); |
| } |
| |
| static int remove_boot_efi(const char *esp_path) { |
| _cleanup_closedir_ DIR *d = NULL; |
| struct dirent *de; |
| const char *p; |
| int r, c = 0; |
| |
| p = prefix_roota(esp_path, "/EFI/BOOT"); |
| d = opendir(p); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open directory \"%s\": %m", p); |
| } |
| |
| FOREACH_DIRENT(de, d, break) { |
| _cleanup_close_ int fd = -1; |
| _cleanup_free_ char *v = NULL; |
| |
| if (!endswith_no_case(de->d_name, ".efi")) |
| continue; |
| |
| if (!startswith_no_case(de->d_name, "boot")) |
| 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 && startswith(v, "systemd-boot ")) { |
| r = unlinkat(dirfd(d), de->d_name, 0); |
| if (r < 0) |
| return log_error_errno(errno, "Failed to remove \"%s/%s\": %m", p, de->d_name); |
| |
| log_info("Removed \"%s/%s\".", p, de->d_name); |
| } |
| |
| c++; |
| } |
| |
| return c; |
| } |
| |
| static int rmdir_one(const char *prefix, const char *suffix) { |
| const char *p; |
| |
| p = prefix_roota(prefix, suffix); |
| if (rmdir(p) < 0) { |
| bool ignore = IN_SET(errno, ENOENT, ENOTEMPTY); |
| |
| log_full_errno(ignore ? LOG_DEBUG : LOG_ERR, errno, |
| "Failed to remove directory \"%s\": %m", p); |
| if (!ignore) |
| return -errno; |
| } else |
| log_info("Removed \"%s\".", p); |
| |
| return 0; |
| } |
| |
| static int remove_subdirs(const char *root, const char *const *subdirs) { |
| int r, q; |
| |
| /* We use recursion here to destroy the directories in reverse order. Which should be safe given how |
| * short the array is. */ |
| |
| if (!subdirs[0]) /* A the end of the list */ |
| return 0; |
| |
| r = remove_subdirs(root, subdirs + 1); |
| q = rmdir_one(root, subdirs[0]); |
| |
| return r < 0 ? r : q; |
| } |
| |
| static int remove_binaries(const char *esp_path) { |
| const char *p; |
| int r, q; |
| |
| p = prefix_roota(esp_path, "/EFI/systemd"); |
| r = rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL); |
| |
| q = remove_boot_efi(esp_path); |
| if (q < 0 && r == 0) |
| r = q; |
| |
| return r; |
| } |
| |
| static int remove_file(const char *root, const char *file) { |
| const char *p; |
| |
| assert(root); |
| assert(file); |
| |
| p = prefix_roota(root, file); |
| if (unlink(p) < 0) { |
| log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno, |
| "Failed to unlink file \"%s\": %m", p); |
| |
| return errno == ENOENT ? 0 : -errno; |
| } |
| |
| log_info("Removed \"%s\".", p); |
| return 1; |
| } |
| |
| static int remove_variables(sd_id128_t uuid, const char *path, bool in_order) { |
| uint16_t slot; |
| int r; |
| |
| if (!is_efi_boot()) |
| return 0; |
| |
| r = find_slot(uuid, path, &slot); |
| if (r != 1) |
| return 0; |
| |
| r = efi_remove_boot_option(slot); |
| if (r < 0) |
| return r; |
| |
| if (in_order) |
| return remove_from_order(slot); |
| |
| return 0; |
| } |
| |
| static int remove_loader_variables(void) { |
| const char *p; |
| int r = 0; |
| |
| /* Remove all persistent loader variables we define */ |
| |
| FOREACH_STRING(p, |
| "LoaderConfigTimeout", |
| "LoaderConfigTimeoutOneShot", |
| "LoaderEntryDefault", |
| "LoaderEntryOneShot", |
| "LoaderSystemToken") { |
| |
| int q; |
| |
| q = efi_set_variable(EFI_VENDOR_LOADER, p, NULL, 0); |
| if (q == -ENOENT) |
| continue; |
| if (q < 0) { |
| log_warning_errno(q, "Failed to remove %s variable: %m", p); |
| if (r >= 0) |
| r = q; |
| } else |
| log_info("Removed EFI variable %s.", p); |
| } |
| |
| return r; |
| } |
| |
| static int install_loader_config(const char *esp_path) { |
| _cleanup_(unlink_and_freep) char *t = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| _cleanup_close_ int fd = -1; |
| const char *p; |
| int r; |
| |
| p = prefix_roota(esp_path, "/loader/loader.conf"); |
| if (access(p, F_OK) >= 0) /* Silently skip creation if the file already exists (early check) */ |
| return 0; |
| |
| fd = open_tmpfile_linkable(p, O_WRONLY|O_CLOEXEC, &t); |
| if (fd < 0) |
| return log_error_errno(fd, "Failed to open \"%s\" for writing: %m", p); |
| |
| f = take_fdopen(&fd, "w"); |
| if (!f) |
| return log_oom(); |
| |
| fprintf(f, "#timeout 3\n" |
| "#console-mode keep\n"); |
| |
| r = fflush_sync_and_check(f); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write \"%s\": %m", p); |
| |
| r = link_tmpfile(fileno(f), t, p); |
| if (r == -EEXIST) |
| return 0; /* Silently skip creation if the file exists now (recheck) */ |
| if (r < 0) |
| return log_error_errno(r, "Failed to move \"%s\" into place: %m", p); |
| |
| t = mfree(t); |
| return 1; |
| } |
| |
| static int help(int argc, char *argv[], void *userdata) { |
| _cleanup_free_ char *link = NULL; |
| int r; |
| |
| r = terminal_urlify_man("bootctl", "1", &link); |
| if (r < 0) |
| return log_oom(); |
| |
| printf("%1$s [OPTIONS...] COMMAND ...\n" |
| "\n%5$sControl EFI firmware boot settings and manage boot loader.%6$s\n" |
| "\n%3$sGeneric EFI Firmware/Boot Loader Commands:%4$s\n" |
| " status Show status of installed boot loader and EFI variables\n" |
| " reboot-to-firmware [BOOL]\n" |
| " Query or set reboot-to-firmware EFI flag\n" |
| " systemd-efi-options [STRING]\n" |
| " Query or set system options string in EFI variable\n" |
| "\n%3$sBoot Loader Specification Commands:%4$s\n" |
| " list List boot loader entries\n" |
| " set-default ID Set default boot loader entry\n" |
| " set-oneshot ID Set default boot loader entry, for next boot only\n" |
| "\n%3$ssystemd-boot Commands:%4$s\n" |
| " install Install systemd-boot to the ESP and EFI variables\n" |
| " update Update systemd-boot in the ESP and EFI variables\n" |
| " remove Remove systemd-boot from the ESP and EFI variables\n" |
| " is-installed Test whether systemd-boot is installed in the ESP\n" |
| " random-seed Initialize random seed in ESP and EFI variables\n" |
| "\n%3$sOptions:%4$s\n" |
| " -h --help Show this help\n" |
| " --version Print version\n" |
| " --esp-path=PATH Path to the EFI System Partition (ESP)\n" |
| " --boot-path=PATH Path to the $BOOT partition\n" |
| " -p --print-esp-path Print path to the EFI System Partition\n" |
| " -x --print-boot-path Print path to the $BOOT partition\n" |
| " --no-variables Don't touch EFI variables\n" |
| " --no-pager Do not pipe output into a pager\n" |
| " --graceful Don't fail when the ESP cannot be found or EFI\n" |
| " variables cannot be written\n" |
| "\nSee the %2$s for details.\n" |
| , program_invocation_short_name |
| , link |
| , ansi_underline(), ansi_normal() |
| , ansi_highlight(), ansi_normal() |
| ); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| enum { |
| ARG_ESP_PATH = 0x100, |
| ARG_BOOT_PATH, |
| ARG_VERSION, |
| ARG_NO_VARIABLES, |
| ARG_NO_PAGER, |
| ARG_GRACEFUL, |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "esp-path", required_argument, NULL, ARG_ESP_PATH }, |
| { "path", required_argument, NULL, ARG_ESP_PATH }, /* Compatibility alias */ |
| { "boot-path", required_argument, NULL, ARG_BOOT_PATH }, |
| { "print-esp-path", no_argument, NULL, 'p' }, |
| { "print-path", no_argument, NULL, 'p' }, /* Compatibility alias */ |
| { "print-boot-path", no_argument, NULL, 'x' }, |
| { "no-variables", no_argument, NULL, ARG_NO_VARIABLES }, |
| { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
| { "graceful", no_argument, NULL, ARG_GRACEFUL }, |
| {} |
| }; |
| |
| int c, r; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "hpx", options, NULL)) >= 0) |
| switch (c) { |
| |
| case 'h': |
| help(0, NULL, NULL); |
| return 0; |
| |
| case ARG_VERSION: |
| return version(); |
| |
| case ARG_ESP_PATH: |
| r = free_and_strdup(&arg_esp_path, optarg); |
| if (r < 0) |
| return log_oom(); |
| break; |
| |
| case ARG_BOOT_PATH: |
| r = free_and_strdup(&arg_xbootldr_path, optarg); |
| if (r < 0) |
| return log_oom(); |
| break; |
| |
| case 'p': |
| if (arg_print_dollar_boot_path) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "--print-boot-path/-x cannot be combined with --print-esp-path/-p"); |
| arg_print_esp_path = true; |
| break; |
| |
| case 'x': |
| if (arg_print_esp_path) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "--print-boot-path/-x cannot be combined with --print-esp-path/-p"); |
| arg_print_dollar_boot_path = true; |
| break; |
| |
| case ARG_NO_VARIABLES: |
| arg_touch_variables = false; |
| break; |
| |
| case ARG_NO_PAGER: |
| arg_pager_flags |= PAGER_DISABLE; |
| break; |
| |
| case ARG_GRACEFUL: |
| arg_graceful = true; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached("Unknown option"); |
| } |
| |
| return 1; |
| } |
| |
| static void read_loader_efi_var(const char *name, char **var) { |
| int r; |
| |
| r = efi_get_variable_string(EFI_VENDOR_LOADER, name, var); |
| if (r < 0 && r != -ENOENT) |
| log_warning_errno(r, "Failed to read EFI variable %s: %m", name); |
| } |
| |
| static void print_yes_no_line(bool first, bool good, const char *name) { |
| printf("%s%s%s%s %s\n", |
| first ? " Features: " : " ", |
| good ? ansi_highlight_green() : ansi_highlight_red(), |
| good ? special_glyph(SPECIAL_GLYPH_CHECK_MARK) : special_glyph(SPECIAL_GLYPH_CROSS_MARK), |
| ansi_normal(), |
| name); |
| } |
| |
| static int verb_status(int argc, char *argv[], void *userdata) { |
| sd_id128_t esp_uuid = SD_ID128_NULL, xbootldr_uuid = SD_ID128_NULL; |
| int r, k; |
| |
| r = acquire_esp(geteuid() != 0, NULL, NULL, NULL, &esp_uuid); |
| if (arg_print_esp_path) { |
| if (r == -EACCES) /* If we couldn't acquire the ESP path, log about access errors (which is the only |
| * error the find_esp_and_warn() won't log on its own) */ |
| return log_error_errno(r, "Failed to determine ESP location: %m"); |
| if (r < 0) |
| return r; |
| |
| puts(arg_esp_path); |
| } |
| |
| r = acquire_xbootldr(geteuid() != 0, &xbootldr_uuid); |
| if (arg_print_dollar_boot_path) { |
| if (r == -EACCES) |
| return log_error_errno(r, "Failed to determine XBOOTLDR location: %m"); |
| if (r < 0) |
| return r; |
| |
| const char *path = arg_dollar_boot_path(); |
| if (!path) |
| return log_error_errno(SYNTHETIC_ERRNO(EACCES), "Failed to determine XBOOTLDR location: %m"); |
| |
| puts(path); |
| } |
| |
| if (arg_print_esp_path || arg_print_dollar_boot_path) |
| return 0; |
| |
| r = 0; /* If we couldn't determine the path, then don't consider that a problem from here on, just show what we |
| * can show */ |
| |
| (void) pager_open(arg_pager_flags); |
| |
| if (is_efi_boot()) { |
| static const struct { |
| uint64_t flag; |
| const char *name; |
| } flags[] = { |
| { EFI_LOADER_FEATURE_BOOT_COUNTING, "Boot counting" }, |
| { EFI_LOADER_FEATURE_CONFIG_TIMEOUT, "Menu timeout control" }, |
| { EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT, "One-shot menu timeout control" }, |
| { EFI_LOADER_FEATURE_ENTRY_DEFAULT, "Default entry control" }, |
| { EFI_LOADER_FEATURE_ENTRY_ONESHOT, "One-shot entry control" }, |
| { EFI_LOADER_FEATURE_XBOOTLDR, "Support for XBOOTLDR partition" }, |
| { EFI_LOADER_FEATURE_RANDOM_SEED, "Support for passing random seed to OS" }, |
| }; |
| |
| _cleanup_free_ char *fw_type = NULL, *fw_info = NULL, *loader = NULL, *loader_path = NULL, *stub = NULL; |
| sd_id128_t loader_part_uuid = SD_ID128_NULL; |
| uint64_t loader_features = 0; |
| size_t i; |
| |
| read_loader_efi_var("LoaderFirmwareType", &fw_type); |
| read_loader_efi_var("LoaderFirmwareInfo", &fw_info); |
| read_loader_efi_var("LoaderInfo", &loader); |
| read_loader_efi_var("StubInfo", &stub); |
| read_loader_efi_var("LoaderImageIdentifier", &loader_path); |
| (void) efi_loader_get_features(&loader_features); |
| |
| if (loader_path) |
| efi_tilt_backslashes(loader_path); |
| |
| k = efi_loader_get_device_part_uuid(&loader_part_uuid); |
| if (k < 0 && k != -ENOENT) |
| r = log_warning_errno(k, "Failed to read EFI variable LoaderDevicePartUUID: %m"); |
| |
| printf("System:\n"); |
| printf(" Firmware: %s%s (%s)%s\n", ansi_highlight(), strna(fw_type), strna(fw_info), ansi_normal()); |
| printf(" Secure Boot: %sd\n", enable_disable(is_efi_secure_boot())); |
| printf(" Setup Mode: %s\n", is_efi_secure_boot_setup_mode() ? "setup" : "user"); |
| |
| k = efi_get_reboot_to_firmware(); |
| if (k > 0) |
| printf(" Boot into FW: %sactive%s\n", ansi_highlight_yellow(), ansi_normal()); |
| else if (k == 0) |
| printf(" Boot into FW: supported\n"); |
| else if (k == -EOPNOTSUPP) |
| printf(" Boot into FW: not supported\n"); |
| else { |
| errno = -k; |
| printf(" Boot into FW: %sfailed%s (%m)\n", ansi_highlight_red(), ansi_normal()); |
| } |
| printf("\n"); |
| |
| printf("Current Boot Loader:\n"); |
| printf(" Product: %s%s%s\n", ansi_highlight(), strna(loader), ansi_normal()); |
| |
| for (i = 0; i < ELEMENTSOF(flags); i++) |
| print_yes_no_line(i == 0, FLAGS_SET(loader_features, flags[i].flag), flags[i].name); |
| |
| sd_id128_t bootloader_esp_uuid; |
| bool have_bootloader_esp_uuid = efi_loader_get_device_part_uuid(&bootloader_esp_uuid) >= 0; |
| |
| print_yes_no_line(false, have_bootloader_esp_uuid, "Boot loader sets ESP partition information"); |
| if (have_bootloader_esp_uuid && !sd_id128_equal(esp_uuid, bootloader_esp_uuid)) |
| printf("WARNING: The boot loader reports different ESP UUID then detected!\n"); |
| |
| if (stub) |
| printf(" Stub: %s\n", stub); |
| if (!sd_id128_is_null(loader_part_uuid)) |
| printf(" ESP: /dev/disk/by-partuuid/" SD_ID128_UUID_FORMAT_STR "\n", |
| SD_ID128_FORMAT_VAL(loader_part_uuid)); |
| else |
| printf(" ESP: n/a\n"); |
| printf(" File: %s%s\n", special_glyph(SPECIAL_GLYPH_TREE_RIGHT), strna(loader_path)); |
| printf("\n"); |
| |
| printf("Random Seed:\n"); |
| printf(" Passed to OS: %s\n", yes_no(access("/sys/firmware/efi/efivars/LoaderRandomSeed-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f", F_OK) >= 0)); |
| printf(" System Token: %s\n", access("/sys/firmware/efi/efivars/LoaderSystemToken-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f", F_OK) >= 0 ? "set" : "not set"); |
| |
| if (arg_esp_path) { |
| _cleanup_free_ char *p = NULL; |
| |
| p = path_join(arg_esp_path, "/loader/random-seed"); |
| if (!p) |
| return log_oom(); |
| |
| printf(" Exists: %s\n", yes_no(access(p, F_OK) >= 0)); |
| } |
| |
| printf("\n"); |
| } else |
| printf("System:\n Not booted with EFI\n\n"); |
| |
| if (arg_esp_path) { |
| k = status_binaries(arg_esp_path, esp_uuid); |
| if (k < 0) |
| r = k; |
| } |
| |
| if (is_efi_boot()) { |
| k = status_variables(); |
| if (k < 0) |
| r = k; |
| } |
| |
| if (arg_esp_path || arg_xbootldr_path) { |
| k = status_entries(arg_esp_path, esp_uuid, arg_xbootldr_path, xbootldr_uuid); |
| if (k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int verb_list(int argc, char *argv[], void *userdata) { |
| _cleanup_(boot_config_free) BootConfig config = {}; |
| _cleanup_strv_free_ char **efi_entries = NULL; |
| int r; |
| |
| /* If we lack privileges we invoke find_esp_and_warn() in "unprivileged mode" here, which does two things: turn |
| * off logging about access errors and turn off potentially privileged device probing. Here we're interested in |
| * the latter but not the former, hence request the mode, and log about EACCES. */ |
| |
| r = acquire_esp(geteuid() != 0, NULL, NULL, NULL, NULL); |
| if (r == -EACCES) /* We really need the ESP path for this call, hence also log about access errors */ |
| return log_error_errno(r, "Failed to determine ESP: %m"); |
| if (r < 0) |
| return r; |
| |
| r = acquire_xbootldr(geteuid() != 0, NULL); |
| if (r == -EACCES) |
| return log_error_errno(r, "Failed to determine XBOOTLDR partition: %m"); |
| if (r < 0) |
| return r; |
| |
| r = boot_entries_load_config(arg_esp_path, arg_xbootldr_path, &config); |
| 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_entries_augment_from_loader(&config, efi_entries, false); |
| |
| if (config.n_entries == 0) |
| log_info("No boot loader entries found."); |
| else { |
| size_t n; |
| |
| (void) pager_open(arg_pager_flags); |
| |
| printf("Boot Loader Entries:\n"); |
| |
| for (n = 0; n < config.n_entries; n++) { |
| r = boot_entry_show(config.entries + n, n == (size_t) config.default_entry); |
| if (r < 0) |
| return r; |
| |
| if (n+1 < config.n_entries) |
| putchar('\n'); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int install_random_seed(const char *esp) { |
| _cleanup_(unlink_and_freep) char *tmp = NULL; |
| _cleanup_free_ void *buffer = NULL; |
| _cleanup_free_ char *path = NULL; |
| _cleanup_close_ int fd = -1; |
| size_t sz, token_size; |
| ssize_t n; |
| int r; |
| |
| assert(esp); |
| |
| path = path_join(esp, "/loader/random-seed"); |
| if (!path) |
| return log_oom(); |
| |
| sz = random_pool_size(); |
| |
| buffer = malloc(sz); |
| if (!buffer) |
| return log_oom(); |
| |
| r = genuine_random_bytes(buffer, sz, RANDOM_BLOCK); |
| if (r < 0) |
| return log_error_errno(r, "Failed to acquire random seed: %m"); |
| |
| /* Normally create_subdirs() should already have created everything we need, but in case "bootctl |
| * random-seed" is called we want to just create the minimum we need for it, and not the full |
| * list. */ |
| r = mkdir_parents(path, 0755); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create parent directory for %s: %m", path); |
| |
| r = tempfn_random(path, "bootctl", &tmp); |
| if (r < 0) |
| return log_oom(); |
| |
| fd = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|O_WRONLY|O_CLOEXEC, 0600); |
| if (fd < 0) { |
| tmp = mfree(tmp); |
| return log_error_errno(fd, "Failed to open random seed file for writing: %m"); |
| } |
| |
| n = write(fd, buffer, sz); |
| if (n < 0) |
| return log_error_errno(errno, "Failed to write random seed file: %m"); |
| if ((size_t) n != sz) |
| return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short write while writing random seed file."); |
| |
| if (rename(tmp, path) < 0) |
| return log_error_errno(r, "Failed to move random seed file into place: %m"); |
| |
| tmp = mfree(tmp); |
| |
| log_info("Random seed file %s successfully written (%zu bytes).", path, sz); |
| |
| if (!arg_touch_variables) |
| return 0; |
| |
| if (!is_efi_boot()) { |
| log_notice("Not booted with EFI, skipping EFI variable setup."); |
| return 0; |
| } |
| |
| r = getenv_bool("SYSTEMD_WRITE_SYSTEM_TOKEN"); |
| if (r < 0) { |
| if (r != -ENXIO) |
| log_warning_errno(r, "Failed to parse $SYSTEMD_WRITE_SYSTEM_TOKEN, ignoring."); |
| |
| if (detect_vm() > 0) { |
| /* Let's not write a system token if we detect we are running in a VM |
| * environment. Why? Our default security model for the random seed uses the system |
| * token as a mechanism to ensure we are not vulnerable to golden master sloppiness |
| * issues, i.e. that people initialize the random seed file, then copy the image to |
| * many systems and end up with the same random seed in each that is assumed to be |
| * valid but in reality is the same for all machines. By storing a system token in |
| * the EFI variable space we can make sure that even though the random seeds on disk |
| * are all the same they will be different on each system under the assumption that |
| * the EFI variable space is maintained separate from the random seed storage. That |
| * is generally the case on physical systems, as the ESP is stored on persistent |
| * storage, and the EFI variables in NVRAM. However in virtualized environments this |
| * is generally not true: the EFI variable set is typically stored along with the |
| * disk image itself. For example, using the OVMF EFI firmware the EFI variables are |
| * stored in a file in the ESP itself. */ |
| |
| log_notice("Not installing system token, since we are running in a virtualized environment."); |
| return 0; |
| } |
| } else if (r == 0) { |
| log_notice("Not writing system token, because $SYSTEMD_WRITE_SYSTEM_TOKEN is set to false."); |
| return 0; |
| } |
| |
| r = efi_get_variable(EFI_VENDOR_LOADER, "LoaderSystemToken", NULL, NULL, &token_size); |
| if (r == -ENODATA) |
| log_debug_errno(r, "LoaderSystemToken EFI variable is invalid (too short?), replacing."); |
| else if (r < 0) { |
| if (r != -ENOENT) |
| return log_error_errno(r, "Failed to test system token validity: %m"); |
| } else { |
| if (token_size >= sz) { |
| /* Let's avoid writes if we can, and initialize this only once. */ |
| log_debug("System token already written, not updating."); |
| return 0; |
| } |
| |
| log_debug("Existing system token size (%zu) does not match our expectations (%zu), replacing.", token_size, sz); |
| } |
| |
| r = genuine_random_bytes(buffer, sz, RANDOM_BLOCK); |
| if (r < 0) |
| return log_error_errno(r, "Failed to acquire random seed: %m"); |
| |
| /* Let's write this variable with an umask in effect, so that unprivileged users can't see the token |
| * and possibly get identification information or too much insight into the kernel's entropy pool |
| * state. */ |
| RUN_WITH_UMASK(0077) { |
| r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderSystemToken", buffer, sz); |
| if (r < 0) { |
| if (!arg_graceful) |
| return log_error_errno(r, "Failed to write 'LoaderSystemToken' EFI variable: %m"); |
| |
| if (r == -EINVAL) |
| log_warning_errno(r, "Unable to write 'LoaderSystemToken' EFI variable (firmware problem?), ignoring: %m"); |
| else |
| log_warning_errno(r, "Unable to write 'LoaderSystemToken' EFI variable, ignoring: %m"); |
| } else |
| log_info("Successfully initialized system token in EFI variable with %zu bytes.", sz); |
| } |
| |
| return 0; |
| } |
| |
| static int sync_everything(void) { |
| int ret = 0, k; |
| |
| if (arg_esp_path) { |
| k = syncfs_path(AT_FDCWD, arg_esp_path); |
| if (k < 0) |
| ret = log_error_errno(k, "Failed to synchronize the ESP '%s': %m", arg_esp_path); |
| } |
| |
| if (arg_xbootldr_path) { |
| k = syncfs_path(AT_FDCWD, arg_xbootldr_path); |
| if (k < 0) |
| ret = log_error_errno(k, "Failed to synchronize $BOOT '%s': %m", arg_xbootldr_path); |
| } |
| |
| return ret; |
| } |
| |
| static int verb_install(int argc, char *argv[], void *userdata) { |
| sd_id128_t uuid = SD_ID128_NULL; |
| uint64_t pstart = 0, psize = 0; |
| uint32_t part = 0; |
| bool install; |
| int r; |
| |
| r = acquire_esp(false, &part, &pstart, &psize, &uuid); |
| if (r < 0) |
| return r; |
| |
| r = acquire_xbootldr(false, NULL); |
| if (r < 0) |
| return r; |
| |
| install = streq(argv[0], "install"); |
| |
| RUN_WITH_UMASK(0002) { |
| if (install) { |
| /* Don't create any of these directories when we are just updating. When we update |
| * we'll drop-in our files (unless there are newer ones already), but we won't create |
| * the directories for them in the first place. */ |
| r = create_subdirs(arg_esp_path, esp_subdirs); |
| if (r < 0) |
| return r; |
| |
| r = create_subdirs(arg_dollar_boot_path(), dollar_boot_subdirs); |
| if (r < 0) |
| return r; |
| } |
| |
| r = install_binaries(arg_esp_path, install); |
| if (r < 0) |
| return r; |
| |
| if (install) { |
| r = install_loader_config(arg_esp_path); |
| if (r < 0) |
| return r; |
| |
| r = install_random_seed(arg_esp_path); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| (void) sync_everything(); |
| |
| if (arg_touch_variables) |
| r = install_variables(arg_esp_path, |
| part, pstart, psize, uuid, |
| "/EFI/systemd/systemd-boot" EFI_MACHINE_TYPE_NAME ".efi", |
| install); |
| |
| return r; |
| } |
| |
| static int verb_remove(int argc, char *argv[], void *userdata) { |
| sd_id128_t uuid = SD_ID128_NULL; |
| int r, q; |
| |
| r = acquire_esp(false, NULL, NULL, NULL, &uuid); |
| if (r < 0) |
| return r; |
| |
| r = acquire_xbootldr(false, NULL); |
| if (r < 0) |
| return r; |
| |
| r = remove_binaries(arg_esp_path); |
| |
| q = remove_file(arg_esp_path, "/loader/loader.conf"); |
| if (q < 0 && r >= 0) |
| r = q; |
| |
| q = remove_file(arg_esp_path, "/loader/random-seed"); |
| if (q < 0 && r >= 0) |
| r = q; |
| |
| q = remove_subdirs(arg_esp_path, esp_subdirs); |
| if (q < 0 && r >= 0) |
| r = q; |
| |
| q = remove_subdirs(arg_esp_path, dollar_boot_subdirs); |
| if (q < 0 && r >= 0) |
| r = q; |
| |
| if (arg_xbootldr_path) { |
| /* Remove the latter two also in the XBOOTLDR partition if it exists */ |
| q = remove_subdirs(arg_xbootldr_path, dollar_boot_subdirs); |
| if (q < 0 && r >= 0) |
| r = q; |
| } |
| |
| (void) sync_everything(); |
| |
| if (!arg_touch_variables) |
| return r; |
| |
| q = remove_variables(uuid, "/EFI/systemd/systemd-boot" EFI_MACHINE_TYPE_NAME ".efi", true); |
| if (q < 0 && r >= 0) |
| r = q; |
| |
| q = remove_loader_variables(); |
| if (q < 0 && r >= 0) |
| r = q; |
| |
| 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 parse_loader_entry_target_arg(const char *arg1, char16_t **ret_target, size_t *ret_target_size) { |
| int r; |
| if (streq(arg1, "@current")) { |
| r = efi_get_variable(EFI_VENDOR_LOADER, "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_VENDOR_LOADER, "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_VENDOR_LOADER, "LoaderEntryDefault", NULL, (void *) ret_target, ret_target_size); |
| if (r < 0) |
| return log_error_errno(r, "Failed to get EFI variable 'LoaderEntryDefault': %m"); |
| } else { |
| char16_t *encoded = NULL; |
| encoded = utf8_to_utf16(arg1, strlen(arg1)); |
| if (!encoded) |
| return log_oom(); |
| *ret_target = encoded; |
| *ret_target_size = char16_strlen(encoded) * 2 + 2; |
| } |
| return 0; |
| } |
| |
| static int verb_set_default(int argc, char *argv[], void *userdata) { |
| const char *name; |
| int r; |
| |
| if (!is_efi_boot()) |
| return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), |
| "Not booted with UEFI."); |
| |
| if (access("/sys/firmware/efi/efivars/LoaderInfo-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f", 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 --touch-variables=no.", |
| argv[0]); |
| |
| name = streq(argv[0], "set-default") ? "LoaderEntryDefault" : "LoaderEntryOneShot"; |
| |
| if (isempty(argv[1])) { |
| r = efi_set_variable(EFI_VENDOR_LOADER, name, NULL, 0); |
| if (r < 0 && r != -ENOENT) |
| return log_error_errno(r, "Failed to remove EFI variable '%s': %m", name); |
| } else { |
| _cleanup_free_ char16_t *target = NULL; |
| size_t target_size = 0; |
| |
| r = parse_loader_entry_target_arg(argv[1], &target, &target_size); |
| if (r < 0) |
| return r; |
| r = efi_set_variable(EFI_VENDOR_LOADER, name, target, target_size); |
| if (r < 0) |
| return log_error_errno(r, "Failed to update EFI variable '%s': %m", name); |
| } |
| |
| return 0; |
| } |
| |
| static int verb_random_seed(int argc, char *argv[], void *userdata) { |
| int r; |
| |
| r = find_esp_and_warn(arg_esp_path, false, &arg_esp_path, NULL, NULL, NULL, NULL); |
| if (r == -ENOKEY) { |
| /* find_esp_and_warn() doesn't warn about ENOKEY, so let's do that on our own */ |
| if (!arg_graceful) |
| return log_error_errno(r, "Unable to find ESP."); |
| |
| log_notice("No ESP found, not initializing random seed."); |
| return 0; |
| } |
| if (r < 0) |
| return r; |
| |
| r = install_random_seed(arg_esp_path); |
| if (r < 0) |
| return r; |
| |
| (void) sync_everything(); |
| return 0; |
| } |
| |
| static int verb_systemd_efi_options(int argc, char *argv[], void *userdata) { |
| int r; |
| |
| if (argc == 1) { |
| _cleanup_free_ char *line = NULL; |
| |
| r = systemd_efi_options_variable(&line); |
| if (r < 0) |
| return log_error_errno(r, "Failed to query SystemdOptions EFI variable: %m"); |
| |
| puts(line); |
| |
| } else { |
| r = efi_set_variable_string(EFI_VENDOR_SYSTEMD, "SystemdOptions", argv[1]); |
| if (r < 0) |
| return log_error_errno(r, "Failed to set SystemdOptions EFI variable: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int verb_reboot_to_firmware(int argc, char *argv[], void *userdata) { |
| int r; |
| |
| if (argc < 2) { |
| r = efi_get_reboot_to_firmware(); |
| if (r > 0) { |
| puts("active"); |
| return EXIT_SUCCESS; /* success */ |
| } |
| if (r == 0) { |
| puts("supported"); |
| return 1; /* recognizable error #1 */ |
| } |
| if (r == -EOPNOTSUPP) { |
| puts("not supported"); |
| return 2; /* recognizable error #2 */ |
| } |
| |
| log_error_errno(r, "Failed to query reboot-to-firmware state: %m"); |
| return 3; /* other kind of error */ |
| } else { |
| r = parse_boolean(argv[1]); |
| if (r < 0) |
| return log_error_errno(r, "Failed to parse argument: %s", argv[1]); |
| |
| r = efi_set_reboot_to_firmware(r); |
| if (r < 0) |
| return log_error_errno(r, "Failed to set reboot-to-firmware option: %m"); |
| |
| return 0; |
| } |
| } |
| |
| 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 }, |
| { "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 }, |
| { "random-seed", VERB_ANY, 1, 0, verb_random_seed }, |
| { "systemd-efi-options", VERB_ANY, 2, 0, verb_systemd_efi_options }, |
| { "reboot-to-firmware", VERB_ANY, 2, 0, verb_reboot_to_firmware }, |
| {} |
| }; |
| |
| return dispatch_verb(argc, argv, verbs, NULL); |
| } |
| |
| static int run(int argc, char *argv[]) { |
| int r; |
| |
| log_parse_environment(); |
| log_open(); |
| |
| /* If we run in a container, automatically turn off EFI file system access */ |
| if (detect_container() > 0) |
| arg_touch_variables = false; |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| return r; |
| |
| return bootctl_main(argc, argv); |
| } |
| |
| DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run); |