X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Fefivars.c;h=4fb77428f22a2b94d79f1ca349a225b40d898582;hb=9f26c90cb50c45d4549c4dd569917b4ac143b94d;hp=840e4e0c350cbbbfeb873375c19f783317f523ae;hpb=9db11a99beaf25f6eb948348202a4c783e1d31a6;p=elogind.git

diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index 840e4e0c3..4fb77428f 100644
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -28,10 +28,42 @@
 #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;
+        void *v;
+        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) {
+                r = -EINVAL;
+                goto finish;
+        }
+
+        b = *(uint8_t *)v;
+        r = b > 0;
+finish:
+        free(v);
+        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,
@@ -306,12 +338,7 @@ static int boot_id_hex(const char s[4]) {
 static int cmp_uint16(const void *_a, const void *_b) {
         const uint16_t *a = _a, *b = _b;
 
-        if (*a < *b)
-                return -1;
-        if (*a > *b)
-                return 1;
-
-        return 0;
+        return (int)*a - (int)*b;
 }
 
 int efi_get_boot_options(uint16_t **options) {
@@ -469,3 +496,5 @@ int efi_get_loader_device_part_uuid(sd_id128_t *u) {
 
         return 0;
 }
+
+#endif