#include <fcntl.h>
#include <ctype.h>
+#include "acpi-fpdt.h"
#include "util.h"
#include "utf8.h"
#include "efivars.h"
+#ifdef ENABLE_EFI
+
bool is_efi_boot(void) {
return access("/sys/firmware/efi", F_OK) >= 0;
}
+static int read_flag(const char *varname) {
+ int r;
+ _cleanup_free_ void *v = NULL;
+ size_t s;
+ uint8_t b;
+
+ r = efi_get_variable(EFI_VENDOR_GLOBAL, varname, NULL, &v, &s);
+ if (r < 0)
+ return r;
+
+ if (s != 1)
+ return -EINVAL;
+
+ b = *(uint8_t *)v;
+ r = b > 0;
+ return r;
+}
+
+int is_efi_secure_boot(void) {
+ return read_flag("SecureBoot");
+}
+
+int is_efi_secure_boot_setup_mode(void) {
+ return read_flag("SetupMode");
+}
+
int efi_get_variable(
sd_id128_t vendor,
const char *name,
n = read(fd, r, (size_t) st.st_size - 4);
if (n < 0) {
free(r);
- return (int) -n;
+ return -errno;
}
if (n != (ssize_t) st.st_size - 4) {
free(r);
int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
_cleanup_free_ void *s = NULL;
- size_t ss;
+ size_t ss = 0;
int r;
char *x;
if (title_size > l - offsetof(struct boot_option, title))
return -EINVAL;
- s = utf16_to_utf8(header->title, title_size);
- if (!s) {
- err = -ENOMEM;
- goto err;
+ if (title) {
+ s = utf16_to_utf8(header->title, title_size);
+ if (!s) {
+ err = -ENOMEM;
+ goto err;
+ }
}
if (header->path_len > 0) {
if (dpath->drive.signature_type != 0x02)
continue;
- efi_guid_to_id128(dpath->drive.signature, &p_uuid);
+ if (part_uuid)
+ efi_guid_to_id128(dpath->drive.signature, &p_uuid);
continue;
}
/* Sub-Type 4 – File Path */
- if (dpath->sub_type == 0x04) {
+ if (dpath->sub_type == 0x04 && !p && path) {
p = utf16_to_utf8(dpath->path, dpath->length-4);
continue;
}
else if (s[i] >= 'A' && s[i] <= 'F')
id |= (s[i] - 'A' + 10) << (3 - i) * 4;
else
- return -1;
+ return -EINVAL;
return id;
}
+static int cmp_uint16(const void *_a, const void *_b) {
+ const uint16_t *a = _a, *b = _b;
+
+ return (int)*a - (int)*b;
+}
+
int efi_get_boot_options(uint16_t **options) {
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *de;
uint16_t *list = NULL;
- int count = 0;
+ int count = 0, r;
assert(options);
if (!dir)
return -errno;
- while ((de = readdir(dir))) {
+ FOREACH_DIRENT(de, dir, r = -errno; goto fail) {
int id;
uint16_t *t;
t = realloc(list, (count + 1) * sizeof(uint16_t));
if (!t) {
- free(list);
- return -ENOMEM;
+ r = -ENOMEM;
+ goto fail;
}
list = t;
list[count ++] = id;
-
}
+ qsort_safe(list, count, sizeof(uint16_t), cmp_uint16);
+
*options = list;
return count;
+
+fail:
+ free(list);
+ return r;
}
static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) {
- _cleanup_free_ void *i = NULL;
_cleanup_free_ char *j = NULL;
- size_t is;
int r;
- uint64_t x;
+ uint64_t x = 0;
assert(name);
assert(u);
- r = efi_get_variable(EFI_VENDOR_LOADER, name, NULL, &i, &is);
+ r = efi_get_variable_string(EFI_VENDOR_LOADER, name, &j);
if (r < 0)
return r;
- j = utf16_to_utf8(i, is);
- if (!j)
- return -ENOMEM;
-
r = safe_atou64(j, &x);
if (r < 0)
return r;
return 0;
}
-static int get_boot_usec(usec_t *firmware, usec_t *loader) {
+int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) {
uint64_t x, y;
int r;
return 0;
}
-int efi_get_boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader) {
- usec_t x, y, a;
- int r;
- dual_timestamp _n;
-
- assert(firmware);
- assert(loader);
-
- if (!n) {
- dual_timestamp_get(&_n);
- n = &_n;
- }
-
- r = get_boot_usec(&x, &y);
- if (r < 0)
- return r;
-
- /* Let's convert this to timestamps where the firmware
- * began/loader began working. To make this more confusing:
- * since usec_t is unsigned and the kernel's monotonic clock
- * begins at kernel initialization we'll actually initialize
- * the monotonic timestamps here as negative of the actual
- * value. */
-
- firmware->monotonic = y;
- loader->monotonic = y - x;
-
- a = n->monotonic + firmware->monotonic;
- firmware->realtime = n->realtime > a ? n->realtime - a : 0;
-
- a = n->monotonic + loader->monotonic;
- loader->realtime = n->realtime > a ? n->realtime - a : 0;
-
- return 0;
-}
-
-int efi_get_loader_device_part_uuid(sd_id128_t *u) {
- _cleanup_free_ void *s = NULL;
+int efi_loader_get_device_part_uuid(sd_id128_t *u) {
_cleanup_free_ char *p = NULL;
- size_t ss;
int r, parsed[16];
- unsigned i;
-
- assert(u);
- r = efi_get_variable(EFI_VENDOR_LOADER, "LoaderDevicePartUUID", NULL, &s, &ss);
+ r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderDevicePartUUID", &p);
if (r < 0)
return r;
- p = utf16_to_utf8(s, ss);
- if (!p)
- return -ENOMEM;
-
if (sscanf(p, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
&parsed[0], &parsed[1], &parsed[2], &parsed[3],
&parsed[4], &parsed[5], &parsed[6], &parsed[7],
&parsed[12], &parsed[13], &parsed[14], &parsed[15]) != 16)
return -EIO;
- for (i = 0; i < ELEMENTSOF(parsed); i++)
- u->bytes[i] = parsed[i];
+ if (u) {
+ unsigned i;
+
+ for (i = 0; i < ELEMENTSOF(parsed); i++)
+ u->bytes[i] = parsed[i];
+ }
return 0;
}
+
+#endif