| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| #include <unistd.h> |
| |
| #include "efi-loader.h" |
| #include "generator.h" |
| #include "initrd-util.h" |
| #include "log.h" |
| #include "mkdir.h" |
| #include "special.h" |
| #include "string-util.h" |
| #include "virt.h" |
| |
| /* This generator pulls systemd-bless-boot.service into the initial transaction if the "LoaderBootCountPath" |
| * EFI variable is set, i.e. the system boots up with boot counting in effect, which means we should mark the |
| * boot as "good" if we manage to boot up far enough. */ |
| |
| static int run(const char *dest, const char *dest_early, const char *dest_late) { |
| |
| if (in_initrd() > 0) { |
| log_debug("Skipping generator, running in the initrd."); |
| return 0; |
| } |
| |
| if (detect_container() > 0) { |
| log_debug("Skipping generator, running in a container."); |
| return 0; |
| } |
| |
| if (!is_efi_boot()) { |
| log_debug("Skipping generator, not an EFI boot."); |
| return 0; |
| } |
| |
| if (access(EFIVAR_PATH(EFI_LOADER_VARIABLE(LoaderBootCountPath)), F_OK) < 0) { |
| |
| if (errno == ENOENT) { |
| log_debug_errno(errno, "Skipping generator, not booted with boot counting in effect."); |
| return 0; |
| } |
| |
| return log_error_errno(errno, "Failed to check if LoaderBootCountPath EFI variable exists: %m"); |
| } |
| |
| /* We pull this in from basic.target so that it ends up in all "regular" boot ups, but not in |
| * rescue.target or even emergency.target. */ |
| const char *p = strjoina(dest_early, "/" SPECIAL_BASIC_TARGET ".wants/systemd-bless-boot.service"); |
| (void) mkdir_parents(p, 0755); |
| if (symlink(SYSTEM_DATA_UNIT_DIR "/systemd-bless-boot.service", p) < 0) |
| return log_error_errno(errno, "Failed to create symlink '%s': %m", p); |
| |
| return 0; |
| } |
| |
| DEFINE_MAIN_GENERATOR_FUNCTION(run); |