72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "efi-loader.h"
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#include "generator.h"
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#include "log.h"
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#include "mkdir.h"
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#include "special.h"
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#include "string-util.h"
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#include "util.h"
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#include "virt.h"
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/* This generator pulls systemd-bless-boot.service into the initial transaction if the "LoaderBootCountPath" EFI
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* variable is set, i.e. the system boots up with boot counting in effect, which means we should mark the boot as
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* "good" if we manage to boot up far enough. */
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static const char *arg_dest = "/tmp";
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int main(int argc, char *argv[]) {
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const char *p;
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log_setup_generator();
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if (argc > 1 && argc != 4) {
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log_error("This program takes three or no arguments.");
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return EXIT_FAILURE;
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}
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if (argc > 1)
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arg_dest = argv[2];
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if (in_initrd() > 0) {
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log_debug("Skipping generator, running in the initrd.");
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return EXIT_SUCCESS;
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}
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if (detect_container() > 0) {
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log_debug("Skipping generator, running in a container.");
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return EXIT_SUCCESS;
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}
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if (!is_efi_boot()) {
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log_debug("Skipping generator, not an EFI boot.");
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return EXIT_SUCCESS;
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}
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if (access("/sys/firmware/efi/efivars/LoaderBootCountPath-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f", F_OK) < 0) {
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if (errno == ENOENT) {
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log_debug_errno(errno, "Skipping generator, not booted with boot counting in effect.");
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return EXIT_SUCCESS;
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}
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log_error_errno(errno, "Failed to check if LoaderBootCountPath EFI variable exists: %m");
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return EXIT_FAILURE;
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}
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/* We pull this in from basic.target so that it ends up in all "regular" boot ups, but not in rescue.target or
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* even emergency.target. */
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p = strjoina(arg_dest, "/" SPECIAL_BASIC_TARGET ".wants/systemd-bless-boot.service");
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(void) mkdir_parents(p, 0755);
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if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-bless-boot.service", p) < 0) {
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log_error_errno(errno, "Failed to create symlink '%s': %m", p);
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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