diff options
Diffstat (limited to 'src/boot/bootctl-install.c')
| -rw-r--r-- | src/boot/bootctl-install.c | 1101 |
1 files changed, 1101 insertions, 0 deletions
diff --git a/src/boot/bootctl-install.c b/src/boot/bootctl-install.c new file mode 100644 index 0000000..bacbbb2 --- /dev/null +++ b/src/boot/bootctl-install.c @@ -0,0 +1,1101 @@ +/* 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; + } +} |