/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include "bootctl.h" #include "bootctl-install.h" #include "bootctl-random-seed.h" #include "bootctl-util.h" #include "chase.h" #include "copy.h" #include "dirent-util.h" #include "efi-api.h" #include "env-file.h" #include "fd-util.h" #include "fileio.h" #include "fs-util.h" #include "glyph-util.h" #include "id128-util.h" #include "os-util.h" #include "path-util.h" #include "rm-rf.h" #include "stat-util.h" #include "sync-util.h" #include "tmpfile-util.h" #include "umask-util.h" #include "utf8.h" static int load_etc_machine_id(void) { int r; r = sd_id128_get_machine(&arg_machine_id); if (ERRNO_IS_NEG_MACHINE_ID_UNSET(r)) /* 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 *p = NULL, *s = NULL, *layout = NULL; int r; p = path_join(arg_root, "/etc/machine-info"); if (!p) return log_oom(); r = parse_env_file(NULL, p, "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)) { if (!arg_quiet) 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 /etc/machine-info.", SD_ID128_TO_STRING(arg_machine_id)); } if (!isempty(layout)) { if (!arg_quiet) 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, *p = NULL; int r; p = path_join(arg_root, etc_kernel(), "install.conf"); if (!p) return log_oom(); r = parse_env_file(NULL, p, "layout", &layout); if (r == -ENOENT) return 0; if (r < 0) return log_error_errno(r, "Failed to parse %s: %m", p); if (!isempty(layout)) { log_debug("layout=%s is specified in %s.", layout, p); free_and_replace(arg_install_layout, layout); } 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_type == BOOT_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; } 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 == -ESRCH) return log_notice_errno(r, "Source file \"%s\" does not carry version information!", from); if (r < 0) return r; r = get_file_version(fd_to, &b); if (r == -ESRCH) return log_notice_errno(r, "Skipping \"%s\", it's owned by another boot loader (no version info found).", to); if (r < 0) return r; if (compare_product(a, b) != 0) return log_notice_errno(SYNTHETIC_ERRNO(ESRCH), "Skipping \"%s\", it's owned by another boot loader.", to); r = compare_version(a, b); log_debug("Comparing versions: \"%s\" %s \"%s\"", a, comparison_operator(r), b); if (r < 0) return log_warning_errno(SYNTHETIC_ERRNO(ESTALE), "Skipping \"%s\", newer boot loader version in place already.", to); if (r == 0) return log_info_errno(SYNTHETIC_ERRNO(ESTALE), "Skipping \"%s\", 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 = -EBADF, fd_to = -EBADF; _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) < 0) 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(); 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(t); return log_error_errno(r, "Failed to copy data from \"%s\" to \"%s\": %m", from, t); } r = RET_NERRNO(renameat(AT_FDCWD, t, AT_FDCWD, to)); if (r < 0) { (void) unlink(t); return log_error_errno(r, "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) { char *root = IN_SET(arg_install_source, ARG_INSTALL_SOURCE_AUTO, ARG_INSTALL_SOURCE_IMAGE) ? arg_root : NULL; _cleanup_free_ char *source_path = NULL, *dest_path = NULL, *p = NULL, *q = NULL; const char *e; char *dest_name, *s; int r, ret; dest_name = strdupa_safe(name); s = endswith_no_case(dest_name, ".signed"); if (s) *s = 0; p = path_join(BOOTLIBDIR, name); if (!p) return log_oom(); r = chase(p, root, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS, &source_path, NULL); /* If we had a root directory to try, we didn't find it and we are in auto mode, retry on the host */ if (r == -ENOENT && root && arg_install_source == ARG_INSTALL_SOURCE_AUTO) r = chase(p, NULL, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS, &source_path, NULL); if (r < 0) return log_error_errno(r, "Failed to resolve path %s%s%s: %m", p, root ? " under directory " : "", strempty(root)); q = path_join("/EFI/systemd/", dest_name); if (!q) return log_oom(); r = chase(q, esp_path, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS|CHASE_NONEXISTENT, &dest_path, NULL); if (r < 0) return log_error_errno(r, "Failed to resolve path %s under directory %s: %m", q, esp_path); /* Note that if this fails we do the second copy anyway, but return this error code, * so we stash it away in a separate variable. */ ret = copy_file_with_version_check(source_path, dest_path, force); e = startswith(dest_name, "systemd-boot"); if (e) { _cleanup_free_ char *default_dest_path = NULL; char *v; /* Create the EFI default boot loader name (specified for removable devices) */ v = strjoina("/EFI/BOOT/BOOT", e); ascii_strupper(strrchr(v, '/') + 1); r = chase(v, esp_path, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS|CHASE_NONEXISTENT, &default_dest_path, NULL); if (r < 0) return log_error_errno(r, "Failed to resolve path %s under directory %s: %m", v, esp_path); r = copy_file_with_version_check(source_path, default_dest_path, force); if (r < 0 && ret == 0) ret = r; } return ret; } static int install_binaries(const char *esp_path, const char *arch, bool force) { char *root = IN_SET(arg_install_source, ARG_INSTALL_SOURCE_AUTO, ARG_INSTALL_SOURCE_IMAGE) ? arg_root : NULL; _cleanup_closedir_ DIR *d = NULL; _cleanup_free_ char *path = NULL; int r; r = chase_and_opendir(BOOTLIBDIR, root, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS, &path, &d); /* If we had a root directory to try, we didn't find it and we are in auto mode, retry on the host */ if (r == -ENOENT && root && arg_install_source == ARG_INSTALL_SOURCE_AUTO) r = chase_and_opendir(BOOTLIBDIR, NULL, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS, &path, &d); if (r == -ENOENT && arg_graceful) { log_debug("Source directory does not exist, ignoring."); return 0; } if (r < 0) return log_error_errno(r, "Failed to open boot loader directory %s%s: %m", strempty(root), BOOTLIBDIR); const char *suffix = strjoina(arch, ".efi"); const char *suffix_signed = strjoina(arch, ".efi.signed"); FOREACH_DIRENT(de, d, return log_error_errno(errno, "Failed to read \"%s\": %m", path)) { int k; if (!endswith_no_case(de->d_name, suffix) && !endswith_no_case(de->d_name, suffix_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, -ESRCH)) continue; RET_GATHER(r, k); } return r; } static int install_loader_config(const char *esp_path) { _cleanup_(unlink_and_freep) char *t = NULL; _cleanup_fclose_ FILE *f = NULL; _cleanup_free_ char *p = NULL; int r; assert(arg_make_entry_directory >= 0); p = path_join(esp_path, "/loader/loader.conf"); if (!p) return log_oom(); if (access(p, F_OK) >= 0) /* Silently skip creation if the file already exists (early check) */ return 0; r = fopen_tmpfile_linkable(p, O_WRONLY|O_CLOEXEC, &t, &f); if (r < 0) return log_error_errno(r, "Failed to open \"%s\" for writing: %m", p); fprintf(f, "#timeout 3\n" "#console-mode keep\n"); if (arg_make_entry_directory) { assert(arg_entry_token); fprintf(f, "default %s-*\n", arg_entry_token); } r = flink_tmpfile(f, t, p, LINK_TMPFILE_SYNC); 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 install_loader_specification(const char *root) { _cleanup_(unlink_and_freep) char *t = NULL; _cleanup_fclose_ FILE *f = NULL; _cleanup_free_ char *p = NULL; int r; p = path_join(root, "/loader/entries.srel"); if (!p) return log_oom(); if (access(p, F_OK) >= 0) /* Silently skip creation if the file already exists (early check) */ return 0; r = fopen_tmpfile_linkable(p, O_WRONLY|O_CLOEXEC, &t, &f); if (r < 0) return log_error_errno(r, "Failed to open \"%s\" for writing: %m", p); fprintf(f, "type1\n"); r = flink_tmpfile(f, t, p, LINK_TMPFILE_SYNC); 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 install_entry_directory(const char *root) { assert(root); assert(arg_make_entry_directory >= 0); if (!arg_make_entry_directory) return 0; assert(arg_entry_token); return mkdir_one(root, arg_entry_token); } static int install_entry_token(void) { _cleanup_free_ char* p = NULL; int r; assert(arg_make_entry_directory >= 0); assert(arg_entry_token); /* Let's save the used entry token in /etc/kernel/entry-token if we used it to create the entry * directory, or if anything else but the machine ID */ if (!arg_make_entry_directory && arg_entry_token_type == BOOT_ENTRY_TOKEN_MACHINE_ID) return 0; p = path_join(arg_root, etc_kernel(), "entry-token"); if (!p) return log_oom(); r = write_string_file(p, arg_entry_token, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_MKDIR_0755); if (r < 0) return log_error_errno(r, "Failed to write entry token '%s' to %s: %m", arg_entry_token, p); return 0; } 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; /* Some motherboards convert the path to uppercase under certain circumstances * (e.g. after booting into the Boot Menu in the ASUS ROG STRIX B350-F GAMING), * so use case-insensitive checking */ if (!strcaseeq_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 = efi_get_boot_options(&options); if (n < 0) return n; /* find already existing systemd-boot entry */ for (int 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 (int i = 0; i < n; i++) if (i != options[i]) { *id = i; return 0; } /* use the next one */ if (n == 0xffff) return -ENOSPC; *id = n; return 0; } static int insert_into_order(uint16_t slot, bool first) { _cleanup_free_ uint16_t *order = NULL; uint16_t *t; int n; 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 (int 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; n = efi_get_boot_order(&order); if (n <= 0) return n; for (int 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 const char *pick_efi_boot_option_description(void) { return arg_efi_boot_option_description ?: "Linux Boot Manager"; } 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, bool graceful) { uint16_t slot; int r; if (arg_root) { log_info("Acting on %s, skipping EFI variable setup.", arg_image ? "image" : "root directory"); return 0; } if (!is_efi_boot()) { log_warning("Not booted with EFI, skipping EFI variable setup."); return 0; } r = chase_and_access(path, esp_path, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS, F_OK, NULL); if (r == -ENOENT) return 0; if (r < 0) return log_error_errno(r, "Cannot access \"%s/%s\": %m", esp_path, path); r = find_slot(uuid, path, &slot); if (r < 0) { int level = graceful ? arg_quiet ? LOG_DEBUG : LOG_INFO : LOG_ERR; const char *skip = graceful ? ", skipping" : ""; log_full_errno(level, r, r == -ENOENT ? "Failed to access EFI variables%s. Is the \"efivarfs\" filesystem mounted?" : "Failed to determine current boot order%s: %m", skip); return graceful ? 0 : r; } if (first || r == 0) { r = efi_add_boot_option(slot, pick_efi_boot_option_description(), part, pstart, psize, uuid, path); if (r < 0) { int level = graceful ? arg_quiet ? LOG_DEBUG : LOG_INFO : LOG_ERR; const char *skip = graceful ? ", skipping" : ""; log_full_errno(level, r, "Failed to create EFI Boot variable entry%s: %m", skip); return graceful ? 0 : r; } log_info("Created EFI boot entry \"%s\".", pick_efi_boot_option_description()); } return insert_into_order(slot, first); } static int are_we_installed(const char *esp_path) { int 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). */ _cleanup_free_ char *p = path_join(esp_path, "/EFI/systemd/"); if (!p) return log_oom(); log_debug("Checking whether %s contains any files%s", p, special_glyph(SPECIAL_GLYPH_ELLIPSIS)); r = dir_is_empty(p, /* ignore_hidden_or_backup= */ false); if (r < 0 && r != -ENOENT) return log_error_errno(r, "Failed to check whether %s contains any files: %m", p); return r == 0; } 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, graceful; int r; /* Invoked for both "update" and "install" */ install = streq(argv[0], "install"); graceful = !install && arg_graceful; /* support graceful mode for updates */ r = acquire_esp(/* unprivileged_mode= */ false, graceful, &part, &pstart, &psize, &uuid, NULL); if (graceful && r == -ENOKEY) return 0; /* If --graceful is specified and we can't find an ESP, handle this cleanly */ if (r < 0) return r; if (!install) { /* If we are updating, don't do anything if sd-boot wasn't actually installed. */ r = are_we_installed(arg_esp_path); if (r < 0) return r; if (r == 0) { log_debug("Skipping update because sd-boot is not installed in the ESP."); return 0; } } r = acquire_xbootldr(/* unprivileged_mode= */ false, NULL, NULL); if (r < 0) return r; r = settle_make_entry_directory(); if (r < 0) return r; const char *arch = arg_arch_all ? "" : get_efi_arch(); 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, arch, install); if (r < 0) return r; if (install) { r = install_loader_config(arg_esp_path); if (r < 0) return r; r = install_entry_directory(arg_dollar_boot_path()); if (r < 0) return r; r = install_entry_token(); if (r < 0) return r; r = install_random_seed(arg_esp_path); if (r < 0) return r; } r = install_loader_specification(arg_dollar_boot_path()); if (r < 0) return r; } (void) sync_everything(); if (!arg_touch_variables) return 0; if (arg_arch_all) { log_info("Not changing EFI variables with --all-architectures."); return 0; } char *path = strjoina("/EFI/systemd/systemd-boot", arch, ".efi"); return install_variables(arg_esp_path, part, pstart, psize, uuid, path, install, graceful); } static int remove_boot_efi(const char *esp_path) { _cleanup_closedir_ DIR *d = NULL; _cleanup_free_ char *p = NULL; int r, c = 0; r = chase_and_opendir("/EFI/BOOT", esp_path, CHASE_PREFIX_ROOT|CHASE_PROHIBIT_SYMLINKS, &p, &d); if (r == -ENOENT) return 0; if (r < 0) return log_error_errno(r, "Failed to open directory \"%s/EFI/BOOT\": %m", esp_path); FOREACH_DIRENT(de, d, break) { _cleanup_close_ int fd = -EBADF; _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 == -ESRCH) continue; /* No version information */ if (r < 0) return r; if (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_entry_directory(const char *root) { assert(root); assert(arg_make_entry_directory >= 0); if (!arg_make_entry_directory || !arg_entry_token) return 0; return rmdir_one(root, arg_entry_token); } 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 (arg_root || !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) { int r = 0; /* Remove all persistent loader variables we define */ FOREACH_STRING(var, EFI_LOADER_VARIABLE(LoaderConfigConsoleMode), EFI_LOADER_VARIABLE(LoaderConfigTimeout), EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), EFI_LOADER_VARIABLE(LoaderEntryDefault), EFI_LOADER_VARIABLE(LoaderEntryLastBooted), EFI_LOADER_VARIABLE(LoaderEntryOneShot), EFI_LOADER_VARIABLE(LoaderSystemToken)){ int q; q = efi_set_variable(var, NULL, 0); if (q == -ENOENT) continue; if (q < 0) { log_warning_errno(q, "Failed to remove EFI variable %s: %m", var); if (r >= 0) r = q; } else log_info("Removed EFI variable %s.", var); } return r; } int verb_remove(int argc, char *argv[], void *userdata) { sd_id128_t uuid = SD_ID128_NULL; int r, q; r = acquire_esp(/* unprivileged_mode= */ false, /* graceful= */ false, NULL, NULL, NULL, &uuid, NULL); if (r < 0) return r; r = acquire_xbootldr(/* unprivileged_mode= */ false, NULL, NULL); if (r < 0) return r; r = settle_make_entry_directory(); 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_file(arg_esp_path, "/loader/entries.srel"); 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; q = remove_entry_directory(arg_esp_path); if (q < 0 && r >= 0) r = q; if (arg_xbootldr_path) { /* Remove a subset of these also from the XBOOTLDR partition if it exists */ q = remove_file(arg_xbootldr_path, "/loader/entries.srel"); if (q < 0 && r >= 0) r = q; q = remove_subdirs(arg_xbootldr_path, dollar_boot_subdirs); if (q < 0 && r >= 0) r = q; q = remove_entry_directory(arg_xbootldr_path); if (q < 0 && r >= 0) r = q; } (void) sync_everything(); if (!arg_touch_variables) return r; if (arg_arch_all) { log_info("Not changing EFI variables with --all-architectures."); return r; } char *path = strjoina("/EFI/systemd/systemd-boot", get_efi_arch(), ".efi"); q = remove_variables(uuid, path, true); if (q < 0 && r >= 0) r = q; q = remove_loader_variables(); if (q < 0 && r >= 0) r = q; return r; } int verb_is_installed(int argc, char *argv[], void *userdata) { int r; r = acquire_esp(/* unprivileged_mode= */ false, /* graceful= */ arg_graceful, NULL, NULL, NULL, NULL, NULL); if (r < 0) return r; r = are_we_installed(arg_esp_path); if (r < 0) return r; if (r > 0) { if (!arg_quiet) puts("yes"); return EXIT_SUCCESS; } else { if (!arg_quiet) puts("no"); return EXIT_FAILURE; } }