1 files changed, 132 insertions, 0 deletions
diff --git a/src/boot/bootctl-util.c b/src/boot/bootctl-util.c
new file mode 100644
index 0000000..3cab875
--- /dev/null
+++ b/src/boot/bootctl-util.c
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sys/mman.h>
+
+#include "bootctl.h"
+#include "bootctl-util.h"
+#include "errno-util.h"
+#include "fileio.h"
+#include "stat-util.h"
+#include "sync-util.h"
+
+int sync_everything(void) {
+        int r = 0, k;
+
+        if (arg_esp_path) {
+                k = syncfs_path(AT_FDCWD, arg_esp_path);
+                if (k < 0)
+                        RET_GATHER(r, 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_GATHER(r, log_error_errno(k, "Failed to synchronize $BOOT '%s': %m", arg_xbootldr_path));
+        }
+
+        return r;
+}
+
+const char *get_efi_arch(void) {
+        /* Detect EFI firmware architecture of the running system. On mixed mode systems, it could be 32-bit
+         * while the kernel is running in 64-bit. */
+
+#ifdef __x86_64__
+        _cleanup_free_ char *platform_size = NULL;
+        int r;
+
+        r = read_one_line_file("/sys/firmware/efi/fw_platform_size", &platform_size);
+        if (r == -ENOENT)
+                return EFI_MACHINE_TYPE_NAME;
+        if (r < 0) {
+                log_warning_errno(r,
+                        "Error reading EFI firmware word size, assuming machine type '%s': %m",
+                        EFI_MACHINE_TYPE_NAME);
+                return EFI_MACHINE_TYPE_NAME;
+        }
+
+        if (streq(platform_size, "64"))
+                return EFI_MACHINE_TYPE_NAME;
+        if (streq(platform_size, "32"))
+                return "ia32";
+
+        log_warning(
+                "Unknown EFI firmware word size '%s', using machine type '%s'.",
+                platform_size,
+                EFI_MACHINE_TYPE_NAME);
+#endif
+
+        return EFI_MACHINE_TYPE_NAME;
+}
+
+/* search for "#### LoaderInfo: systemd-boot 218 ####" string inside the binary */
+int get_file_version(int fd, char **ret) {
+        struct stat st;
+        char *buf;
+        const char *s, *e;
+        char *marker = NULL;
+        int r;
+
+        assert(fd >= 0);
+        assert(ret);
+
+        if (fstat(fd, &st) < 0)
+                return log_error_errno(errno, "Failed to stat EFI binary: %m");
+
+        r = stat_verify_regular(&st);
+        if (r < 0) {
+                log_debug_errno(r, "EFI binary is not a regular file, assuming no version information: %m");
+                return -ESRCH;
+        }
+
+        if (st.st_size < 27 || file_offset_beyond_memory_size(st.st_size))
+                return log_debug_errno(SYNTHETIC_ERRNO(ESRCH),
+                                       "EFI binary size too %s: %"PRIi64,
+                                       st.st_size < 27 ? "small" : "large", st.st_size);
+
+        buf = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+        if (buf == MAP_FAILED)
+                return log_error_errno(errno, "Failed to mmap EFI binary: %m");
+
+        s = mempmem_safe(buf, st.st_size - 8, "#### LoaderInfo: ", 17);
+        if (!s) {
+                r = log_debug_errno(SYNTHETIC_ERRNO(ESRCH), "EFI binary has no LoaderInfo marker.");
+                goto finish;
+        }
+
+        e = memmem_safe(s, st.st_size - (s - buf), " ####", 5);
+        if (!e || e - s < 3) {
+                r = log_error_errno(SYNTHETIC_ERRNO(EINVAL), "EFI binary has malformed LoaderInfo marker.");
+                goto finish;
+        }
+
+        marker = strndup(s, e - s);
+        if (!marker) {
+                r = log_oom();
+                goto finish;
+        }
+
+        log_debug("EFI binary LoaderInfo marker: \"%s\"", marker);
+        r = 0;
+        *ret = marker;
+finish:
+        (void) munmap(buf, st.st_size);
+        return r;
+}
+
+int settle_entry_token(void) {
+        int r;
+
+        r = boot_entry_token_ensure(
+                        arg_root,
+                        etc_kernel(),
+                        arg_machine_id,
+                        /* machine_id_is_random = */ false,
+                        &arg_entry_token_type,
+                        &arg_entry_token);
+        if (r < 0)
+                return r;
+
+        log_debug("Using entry token: %s", arg_entry_token);
+        return 0;
+}